Aldehyde and ketone compounds are ubiquitous in the air and prone to adverse effects on human health.Cooking emission is one of the major indoor sources.Aiming to evaluate health risks associated with inhalation expos...Aldehyde and ketone compounds are ubiquitous in the air and prone to adverse effects on human health.Cooking emission is one of the major indoor sources.Aiming to evaluate health risks associated with inhalation exposure to aldehyde and ketone compounds,13 carbonyl compounds(CCs)released from heating 5 edible oils,3 seasonings,and 2 dishes were investigated in a kitchen laboratory.For the scenarios of heating five types of oil,aldehydes accounted for 61.1%-78.0%of the total emission,mainly acetaldehyde,acrolein and hexanal.Comparatively,heating oil with added seasonings released greater concentrations of aldehyde and ketone compounds.The concentration enhancement of larger molecular aldehydes was significantly greater.The emission factors of aldehyde and ketone compounds for cooking the dish of chili friedmeatweremuch greater compared to that of tomato fried eggs.Therefore,food materials also had a great impact on the aldehyde and ketone emissions.Acetone and acetaldehyde were the most abundant CCs in the kitchen.Acrolein concentrations ranged from 235.18 to 498.71μg/m^(3),which was about 100 times greater compared to the guidelines provided by Office of Environmental Health Hazard Assessment(OEHHA).The acetaldehyde inhalation for adultswas 856.83-1515.55μg and 56.23-192.79μg from exposure to chili fried meat and tomato fried eggs,respectively.This exceeds the reference value of 90μg/day provided by OEHHA.The findings of this study provided scientific evidences for the roles of cooking emissions on indoor air quality and human health.展开更多
Green,mild and efficient iodination of hydroxylated aromatic aldehydes and ketones using iodine and iodic acid in the solidstate by grinding under solvent-free conditions at room temperature.This method provides sever...Green,mild and efficient iodination of hydroxylated aromatic aldehydes and ketones using iodine and iodic acid in the solidstate by grinding under solvent-free conditions at room temperature.This method provides several advantages such as environmentally friendly,short reaction times,high yields,non-hazardous and simple work-up procedure.展开更多
The sodium borohydride reduction of aldehydes and ketones to corresponding alcohols has been accomplished via the use of ionic liquids. The alcohols are easily obtained with excellent yields and the ionic liquid BMImB...The sodium borohydride reduction of aldehydes and ketones to corresponding alcohols has been accomplished via the use of ionic liquids. The alcohols are easily obtained with excellent yields and the ionic liquid BMImBF4 could be reused.展开更多
In this study,a practical process for ozonization of benzyl alcohols to ketones and aldehydes in a rotating packed bed(RPB-O3)reactor has been developed.Using 1-phenylethanol as a model reactant,the performance of RPB...In this study,a practical process for ozonization of benzyl alcohols to ketones and aldehydes in a rotating packed bed(RPB-O3)reactor has been developed.Using 1-phenylethanol as a model reactant,the performance of RPB-O3 process in different solvents has been compared with the commonly used stirred tank reactor(STR-O3).Ethyl acetate was the optimum solvent for the conversion of 1-phenylenthanol to acetophenone in RPB-O3 process,with 78%yield after 30 min.In a parallel STR-O3 experiment,the yield of acetophenone was50%.Other experimental variables,i.e.O3 concentration,reaction time,high-gravity factor and liquid flow rate were also optimized.The highest yield of acetophenone was obtained using O3 concentration of 80 mg·L-1,reaction time of 30 min,high gravity factor of 40 and liquid flow rate of 120 L·h-1.Under the optimized reaction conditions,a series of structurally diverse primary and secondary alcohols was oxidized with(19%–92%)yield.The ozonization mechanism was studied by Electron Paramagnetic Resonance(EPR)spectroscopy,monitoring the radical species formed upon self-decomposition of O3.The characteristic quadruple peak with the 1:2:2:1 intensity ratio that corresponds to hydroxyl radicals(·OH)was observed in the electron paramagnetic resonance(EPR)spectrum,indicating an indirect oxidation mechanism of alcohols via·OH radical.展开更多
Acrolein in spinal cord injury:The propensity of reactive aldehydes such as acrolein to both initiate and perpetuate tissue damage after spinal cord injury (SCI) is well established.Formed primarily from lipid peroxid...Acrolein in spinal cord injury:The propensity of reactive aldehydes such as acrolein to both initiate and perpetuate tissue damage after spinal cord injury (SCI) is well established.Formed primarily from lipid peroxidation,acrolein is known to be one of the most reactive aldehydes.Acrolein will quickly overwhelm endogenous clearance mechanisms and antioxidants,and form adductswith lipids,proteins,and DNA.展开更多
Mental disorders such as depression and anxiety inflict significant burdens on individuals and society.Commonly prescribed treatments often involve cognitive therapy and medications.However,for patients resistant to t...Mental disorders such as depression and anxiety inflict significant burdens on individuals and society.Commonly prescribed treatments often involve cognitive therapy and medications.However,for patients resistant to these conventional methods,alternative therapies like the Ketogenic Diet(KD)offer a promising avenue.KD and its key metabolite,β-hydroxybutyrate(BHB),have been hypothesized to alleviate mental disorders through antiinflammatory actions,a crucial pathway in the pathophysiology of depression.This mini-review examines 15 clinical trials exploring the influence of KD and BHB on inflammation and their potential roles in managing mental disorders.Both human and animal studies were scrutinized to elucidate possible cellular and molecular mechanisms.Out of the 15 trials,10 reported reduced levels of at least one inflammatory mediator or mRNA post KD or BHB treatment,while two observed an elevation in anti-inflammatory agents.These findings suggest that KD and BHB could modulate cellular inflammatory pathways,highlighting their potential for therapeutic application in mental disorders.展开更多
Acetals and ketals are among the important materials of organic synthesis and as protecting agent of carbonyl functionality. A milder, efficient and green synthesis of acetals and ketals has been developed using Silic...Acetals and ketals are among the important materials of organic synthesis and as protecting agent of carbonyl functionality. A milder, efficient and green synthesis of acetals and ketals has been developed using Silicotungstic acid modified Bentonite (STA-Ben) as a catalyst. STA-Ben has been synthesized and characterized by various analytical techniques. It has been found to be an efficient and reusable catalyst for the synthesis of acetyl derivatives in excellent yields. In order to elucidate the efficiency of the STA-Ben as catalyst, reaction has also been performed using various catalysts. The reaction conditions (time and amount of catalyst) have been optimized using various catalysts. The products of the various reactions have been characterized by FT-IR, NMR.展开更多
As one of the few renewable aromatic resources,the research of depolymerization of lignin into highvalue chemicals has attracted extensive attention in recent years.Catalytic wet aerobic oxidation(CWAO)is an effective...As one of the few renewable aromatic resources,the research of depolymerization of lignin into highvalue chemicals has attracted extensive attention in recent years.Catalytic wet aerobic oxidation(CWAO)is an effective technology to convert lignin like sodium lignosulfonate(SL),a lignin derivative,into aromatic aldehydes such as vanillin and syringaldehyde.However,how to improve the yield of aromatic aldehyde and conversion efficiency is still a challenge,and many operating conditions that significantly affect the yield of these aromatic compounds have rarely been investigated systematically.In this work,we adopted the stirred tank reactor(STR)for the CWAO process with nano-CuO as catalyst to achieve the conversion of SL into vanillin and syringaldehyde.The effect of operating conditions including reaction time,oxygen partial pressure,reaction temperature,SL concentration,rotational speed,catalyst amount,and NaOH concentration on the yield of single phenolic compound was systematically investigated.The results revealed that all these operating conditions exhibit a significant effect on the aromatic aldehyde yield.Therefore,they should be regulated in an optimal value to obtain high yield of these aldehydes.More importantly,the reaction kinetics of the lignin oxidation was explored.This work could provide basic data for the optimization and design of industrial operation of lignin oxidation.展开更多
The transformation of aldose to ketose or common sugars into rare saccharides,including rare ketoses and aldoses,is of great value and interest to the food industry and for saccharidic biomass utilization,medicine,and...The transformation of aldose to ketose or common sugars into rare saccharides,including rare ketoses and aldoses,is of great value and interest to the food industry and for saccharidic biomass utilization,medicine,and the synthesis of drugs.Nowadays,high-fructose corn syrup(HFCS)is industrially produced in more than 10 million tons annually using immobilized glucose isomerase.Some low-calorie saccharides such as tagatose and psicose,which are becoming popular sweeteners,have also been produced on a pilot scale in order to replace sucrose and HFCS.However,current catalysts and catalytic processes are still difficult to utilize in biomass conversion and also have strong substrate dependence in producing high-value,rare sugars.Considering the specific reaction properties of saccharides and catalysts,since the pioneering discovery by Fischer,various catalysts and catalytic systems have been discovered or developed in attempts to extend the reaction pathways,improve the reaction efficiency,and to potentially produce commercial products.In this review,we trace the history of sugar isomerization/epimerization reactions and summarize the important breakthroughs for each reaction as well as the difficulties that remain unresolved to date.展开更多
The complexation of four neutral guest molecules containing carbon-oxygen double bonds,i.e.,1,6-diacetoxy-hexane(1),dimethyl hexanedioate(2),hexanal(3),and 2-hexanone(4),by per-ethylated pillar[5]arene is reported.The...The complexation of four neutral guest molecules containing carbon-oxygen double bonds,i.e.,1,6-diacetoxy-hexane(1),dimethyl hexanedioate(2),hexanal(3),and 2-hexanone(4),by per-ethylated pillar[5]arene is reported.These guests show remarkably different binding affinities.For example,ester 1 could be fully engulfed by the host cavity to form a[2]pseudorotaxane-type inclusion complex,while for 2,no obvious host-guest interaction was ob-served.展开更多
The solvent-free reactions of aromatic ketones and aldehydes in the presence of Zn-ZnCl2 were performed with the aid of high-speed vibration mill, Retsch MM200 mixer mill and Retsch RM100 mortar grinder to give pinaco...The solvent-free reactions of aromatic ketones and aldehydes in the presence of Zn-ZnCl2 were performed with the aid of high-speed vibration mill, Retsch MM200 mixer mill and Retsch RM100 mortar grinder to give pinacol coupling and reduction products in varying yields.展开更多
The metal-free combination of catalytic amounts of PPh_3,B(C_6F_5)_3,and PhSiH_3 can efficiently hydrosilylate aldehydes, ketones,aldimines and ketimines to afford the corresponding reduction products in good yields.
Di(4-bromophenyl)ketone and various aromatic diamines as the monomers,a series of novel poly(imino ketone)s (PIKs)have been synthesized via palladium-catalyzed aryl amination,which is Hartwig-Buchwald polycondensation...Di(4-bromophenyl)ketone and various aromatic diamines as the monomers,a series of novel poly(imino ketone)s (PIKs)have been synthesized via palladium-catalyzed aryl amination,which is Hartwig-Buchwald polycondensation reaction.The structures of PIKs are characterized by means of elemental analysis,FT-IR,~1H-NMR and UV-Vis spectroscopy. The results show a good agreement with the proposed structure.The general properties of PIKs are studied by DSC,TG and wide-angle X-ray diffraction,the solubility behavior...展开更多
A new poly(aryl ether ketone) containing biphenylphthalazinone moiety was prepared by thereaction of 4-(4-hydroxybiphenyl) phthalazine-1-one with 4, 4’-difluorobenzophenone. The monomer and thepolymer were characteri...A new poly(aryl ether ketone) containing biphenylphthalazinone moiety was prepared by thereaction of 4-(4-hydroxybiphenyl) phthalazine-1-one with 4, 4’-difluorobenzophenone. The monomer and thepolymer were characterized by FT-IR and ~1H-NMR. Some properties of this polymer were described.展开更多
A novel heterocyclic poly (aryl ether ketone ketone) (PPEKK) containing cyclohexenering was prepared from 1-methyl-cyclohex-1-ene-4, 5 -diyl-bis(4-chlorophenyl methanone) and 4 (4-hydroxyphenyl)(2H) phthalazin-1-one. ...A novel heterocyclic poly (aryl ether ketone ketone) (PPEKK) containing cyclohexenering was prepared from 1-methyl-cyclohex-1-ene-4, 5 -diyl-bis(4-chlorophenyl methanone) and 4 (4-hydroxyphenyl)(2H) phthalazin-1-one. The polymer was characterized by FTIR, 1HNMR, DSC,TG and X-ray analysis.展开更多
In this paper,a series of optically active MeO-BIPHEP-type ligands,(S)-6,6′-dimethoxy-2,2’-bis(di-p-alkoxyphenylphosphine)- 1,1′-biphenyl were synthesized and used to prepare the ruthenium complex.The effects of pa...In this paper,a series of optically active MeO-BIPHEP-type ligands,(S)-6,6′-dimethoxy-2,2’-bis(di-p-alkoxyphenylphosphine)- 1,1′-biphenyl were synthesized and used to prepare the ruthenium complex.The effects of para-substituted were observed,the results showed that the ruthenium catalysts[diphosphine RuCl<sub>2</sub> diamine]containing both t-Bu and i-Pr substitutions have better activities and enantioselectivities than the non-substituted ruthenium catalysts in the asymmetric hydrogenation of acetophenone.展开更多
A novel soluble poly(aryl ether ketone) was prepared by the reaction of 4-(3-phenyl-4-hydr-oxyphenyl)phthalazinone with 4,4’-difluorobenzophenone. The polymer was characterized by DSC, TGA andX-ray diffraction.
The contents of terpenoid aldehydes in Bt transgenic cotton and their non-Bt parental varieties were analyzed by the HPLC method. Statistical analysis of variance showed that Bt insecticidal protein Bt-ICP expression ...The contents of terpenoid aldehydes in Bt transgenic cotton and their non-Bt parental varieties were analyzed by the HPLC method. Statistical analysis of variance showed that Bt insecticidal protein Bt-ICP expression has no negative effect on the synthesis of gossypol, total heliocides and total resistant terpenoids.The results of the combined dosage test of Bt-ICP and gossypoi in vitro showed that there is no interaction between gossypol and Bt-ICP on the mortality of cotton boilworm larvae Helicoverpa armigera (Hubnner). It is indicated that the actions of Bt-ICP and gossypol on cotton bollworm are additive. Therefore, it is advantageous to combine Bt-ICP with cotton terpenoid aldehydes in controlling cotton bollworm.展开更多
基金supported by the National Natural Science Foundation of China(No.22076025)Talent Introduction Project of Fudan University(No.JIH1829013)the National Natural Science Foundation of China(No.32101191).
文摘Aldehyde and ketone compounds are ubiquitous in the air and prone to adverse effects on human health.Cooking emission is one of the major indoor sources.Aiming to evaluate health risks associated with inhalation exposure to aldehyde and ketone compounds,13 carbonyl compounds(CCs)released from heating 5 edible oils,3 seasonings,and 2 dishes were investigated in a kitchen laboratory.For the scenarios of heating five types of oil,aldehydes accounted for 61.1%-78.0%of the total emission,mainly acetaldehyde,acrolein and hexanal.Comparatively,heating oil with added seasonings released greater concentrations of aldehyde and ketone compounds.The concentration enhancement of larger molecular aldehydes was significantly greater.The emission factors of aldehyde and ketone compounds for cooking the dish of chili friedmeatweremuch greater compared to that of tomato fried eggs.Therefore,food materials also had a great impact on the aldehyde and ketone emissions.Acetone and acetaldehyde were the most abundant CCs in the kitchen.Acrolein concentrations ranged from 235.18 to 498.71μg/m^(3),which was about 100 times greater compared to the guidelines provided by Office of Environmental Health Hazard Assessment(OEHHA).The acetaldehyde inhalation for adultswas 856.83-1515.55μg and 56.23-192.79μg from exposure to chili fried meat and tomato fried eggs,respectively.This exceeds the reference value of 90μg/day provided by OEHHA.The findings of this study provided scientific evidences for the roles of cooking emissions on indoor air quality and human health.
文摘Green,mild and efficient iodination of hydroxylated aromatic aldehydes and ketones using iodine and iodic acid in the solidstate by grinding under solvent-free conditions at room temperature.This method provides several advantages such as environmentally friendly,short reaction times,high yields,non-hazardous and simple work-up procedure.
文摘The sodium borohydride reduction of aldehydes and ketones to corresponding alcohols has been accomplished via the use of ionic liquids. The alcohols are easily obtained with excellent yields and the ionic liquid BMImBF4 could be reused.
基金supported by the Specialized Research Fund for Sanjin Scholars Program of Shanxi Province(201707)Key Research&Development Plan of Shanxi Province(201903D321059)+1 种基金Shanxi Scholarship Council of China(2019032)Shanxi Graduate Education Innovation Project(2019BY106)。
文摘In this study,a practical process for ozonization of benzyl alcohols to ketones and aldehydes in a rotating packed bed(RPB-O3)reactor has been developed.Using 1-phenylethanol as a model reactant,the performance of RPB-O3 process in different solvents has been compared with the commonly used stirred tank reactor(STR-O3).Ethyl acetate was the optimum solvent for the conversion of 1-phenylenthanol to acetophenone in RPB-O3 process,with 78%yield after 30 min.In a parallel STR-O3 experiment,the yield of acetophenone was50%.Other experimental variables,i.e.O3 concentration,reaction time,high-gravity factor and liquid flow rate were also optimized.The highest yield of acetophenone was obtained using O3 concentration of 80 mg·L-1,reaction time of 30 min,high gravity factor of 40 and liquid flow rate of 120 L·h-1.Under the optimized reaction conditions,a series of structurally diverse primary and secondary alcohols was oxidized with(19%–92%)yield.The ozonization mechanism was studied by Electron Paramagnetic Resonance(EPR)spectroscopy,monitoring the radical species formed upon self-decomposition of O3.The characteristic quadruple peak with the 1:2:2:1 intensity ratio that corresponds to hydroxyl radicals(·OH)was observed in the electron paramagnetic resonance(EPR)spectrum,indicating an indirect oxidation mechanism of alcohols via·OH radical.
文摘Acrolein in spinal cord injury:The propensity of reactive aldehydes such as acrolein to both initiate and perpetuate tissue damage after spinal cord injury (SCI) is well established.Formed primarily from lipid peroxidation,acrolein is known to be one of the most reactive aldehydes.Acrolein will quickly overwhelm endogenous clearance mechanisms and antioxidants,and form adductswith lipids,proteins,and DNA.
基金Department of Science and Technology of Jilin Province,No.20210402019GH,Fundamental Research Funds of Jilin University,Seed Fund,No.2021ZZ021Jilin Province Education Science Planning Project,No.GH21006 and the Fundamental Research Funds for the Central Universities,No.2022CXTD03.
文摘Mental disorders such as depression and anxiety inflict significant burdens on individuals and society.Commonly prescribed treatments often involve cognitive therapy and medications.However,for patients resistant to these conventional methods,alternative therapies like the Ketogenic Diet(KD)offer a promising avenue.KD and its key metabolite,β-hydroxybutyrate(BHB),have been hypothesized to alleviate mental disorders through antiinflammatory actions,a crucial pathway in the pathophysiology of depression.This mini-review examines 15 clinical trials exploring the influence of KD and BHB on inflammation and their potential roles in managing mental disorders.Both human and animal studies were scrutinized to elucidate possible cellular and molecular mechanisms.Out of the 15 trials,10 reported reduced levels of at least one inflammatory mediator or mRNA post KD or BHB treatment,while two observed an elevation in anti-inflammatory agents.These findings suggest that KD and BHB could modulate cellular inflammatory pathways,highlighting their potential for therapeutic application in mental disorders.
文摘Acetals and ketals are among the important materials of organic synthesis and as protecting agent of carbonyl functionality. A milder, efficient and green synthesis of acetals and ketals has been developed using Silicotungstic acid modified Bentonite (STA-Ben) as a catalyst. STA-Ben has been synthesized and characterized by various analytical techniques. It has been found to be an efficient and reusable catalyst for the synthesis of acetyl derivatives in excellent yields. In order to elucidate the efficiency of the STA-Ben as catalyst, reaction has also been performed using various catalysts. The reaction conditions (time and amount of catalyst) have been optimized using various catalysts. The products of the various reactions have been characterized by FT-IR, NMR.
基金supported by the National Key Research and Development Program of China(2019YFA0210302)the National Natural Science Foundation of China(21878009).
文摘As one of the few renewable aromatic resources,the research of depolymerization of lignin into highvalue chemicals has attracted extensive attention in recent years.Catalytic wet aerobic oxidation(CWAO)is an effective technology to convert lignin like sodium lignosulfonate(SL),a lignin derivative,into aromatic aldehydes such as vanillin and syringaldehyde.However,how to improve the yield of aromatic aldehyde and conversion efficiency is still a challenge,and many operating conditions that significantly affect the yield of these aromatic compounds have rarely been investigated systematically.In this work,we adopted the stirred tank reactor(STR)for the CWAO process with nano-CuO as catalyst to achieve the conversion of SL into vanillin and syringaldehyde.The effect of operating conditions including reaction time,oxygen partial pressure,reaction temperature,SL concentration,rotational speed,catalyst amount,and NaOH concentration on the yield of single phenolic compound was systematically investigated.The results revealed that all these operating conditions exhibit a significant effect on the aromatic aldehyde yield.Therefore,they should be regulated in an optimal value to obtain high yield of these aldehydes.More importantly,the reaction kinetics of the lignin oxidation was explored.This work could provide basic data for the optimization and design of industrial operation of lignin oxidation.
基金Financial support by Dual Initiative Project of Jiangsu Province and Changzhou University is gratefully acknowledgedSample analysis supported by Analysis and Testing Center,NERC Biomass of Changzhou University was also greatly acknowledged.
文摘The transformation of aldose to ketose or common sugars into rare saccharides,including rare ketoses and aldoses,is of great value and interest to the food industry and for saccharidic biomass utilization,medicine,and the synthesis of drugs.Nowadays,high-fructose corn syrup(HFCS)is industrially produced in more than 10 million tons annually using immobilized glucose isomerase.Some low-calorie saccharides such as tagatose and psicose,which are becoming popular sweeteners,have also been produced on a pilot scale in order to replace sucrose and HFCS.However,current catalysts and catalytic processes are still difficult to utilize in biomass conversion and also have strong substrate dependence in producing high-value,rare sugars.Considering the specific reaction properties of saccharides and catalysts,since the pioneering discovery by Fischer,various catalysts and catalytic systems have been discovered or developed in attempts to extend the reaction pathways,improve the reaction efficiency,and to potentially produce commercial products.In this review,we trace the history of sugar isomerization/epimerization reactions and summarize the important breakthroughs for each reaction as well as the difficulties that remain unresolved to date.
基金supported by NNSFC(Nos.21272155 and 21272147)Innovation Program of Shanghai Municipal Education Commission(No.13YZ010).
文摘The complexation of four neutral guest molecules containing carbon-oxygen double bonds,i.e.,1,6-diacetoxy-hexane(1),dimethyl hexanedioate(2),hexanal(3),and 2-hexanone(4),by per-ethylated pillar[5]arene is reported.These guests show remarkably different binding affinities.For example,ester 1 could be fully engulfed by the host cavity to form a[2]pseudorotaxane-type inclusion complex,while for 2,no obvious host-guest interaction was ob-served.
文摘The solvent-free reactions of aromatic ketones and aldehydes in the presence of Zn-ZnCl2 were performed with the aid of high-speed vibration mill, Retsch MM200 mixer mill and Retsch RM100 mortar grinder to give pinacol coupling and reduction products in varying yields.
文摘The metal-free combination of catalytic amounts of PPh_3,B(C_6F_5)_3,and PhSiH_3 can efficiently hydrosilylate aldehydes, ketones,aldimines and ketimines to afford the corresponding reduction products in good yields.
基金This work was financially supported by the National Natural Science Foundation of China(No.15076017).
文摘Di(4-bromophenyl)ketone and various aromatic diamines as the monomers,a series of novel poly(imino ketone)s (PIKs)have been synthesized via palladium-catalyzed aryl amination,which is Hartwig-Buchwald polycondensation reaction.The structures of PIKs are characterized by means of elemental analysis,FT-IR,~1H-NMR and UV-Vis spectroscopy. The results show a good agreement with the proposed structure.The general properties of PIKs are studied by DSC,TG and wide-angle X-ray diffraction,the solubility behavior...
基金This work was supported by the National Natural Science Foundation of China.
文摘A new poly(aryl ether ketone) containing biphenylphthalazinone moiety was prepared by thereaction of 4-(4-hydroxybiphenyl) phthalazine-1-one with 4, 4’-difluorobenzophenone. The monomer and thepolymer were characterized by FT-IR and ~1H-NMR. Some properties of this polymer were described.
文摘A novel heterocyclic poly (aryl ether ketone ketone) (PPEKK) containing cyclohexenering was prepared from 1-methyl-cyclohex-1-ene-4, 5 -diyl-bis(4-chlorophenyl methanone) and 4 (4-hydroxyphenyl)(2H) phthalazin-1-one. The polymer was characterized by FTIR, 1HNMR, DSC,TG and X-ray analysis.
基金the NSFC(No.20272037),the Doctor's Foundation of Education Ministry of China(No.20030610022)Foundation of Xihua University(No.R0723315) and(No.07ZA109) for the financial support of this work.
文摘In this paper,a series of optically active MeO-BIPHEP-type ligands,(S)-6,6′-dimethoxy-2,2’-bis(di-p-alkoxyphenylphosphine)- 1,1′-biphenyl were synthesized and used to prepare the ruthenium complex.The effects of para-substituted were observed,the results showed that the ruthenium catalysts[diphosphine RuCl<sub>2</sub> diamine]containing both t-Bu and i-Pr substitutions have better activities and enantioselectivities than the non-substituted ruthenium catalysts in the asymmetric hydrogenation of acetophenone.
基金This work was supported by the National Natural Science Foundation.
文摘A novel soluble poly(aryl ether ketone) was prepared by the reaction of 4-(3-phenyl-4-hydr-oxyphenyl)phthalazinone with 4,4’-difluorobenzophenone. The polymer was characterized by DSC, TGA andX-ray diffraction.
文摘The contents of terpenoid aldehydes in Bt transgenic cotton and their non-Bt parental varieties were analyzed by the HPLC method. Statistical analysis of variance showed that Bt insecticidal protein Bt-ICP expression has no negative effect on the synthesis of gossypol, total heliocides and total resistant terpenoids.The results of the combined dosage test of Bt-ICP and gossypoi in vitro showed that there is no interaction between gossypol and Bt-ICP on the mortality of cotton boilworm larvae Helicoverpa armigera (Hubnner). It is indicated that the actions of Bt-ICP and gossypol on cotton bollworm are additive. Therefore, it is advantageous to combine Bt-ICP with cotton terpenoid aldehydes in controlling cotton bollworm.
