A novel alkenoic acid ester, （E）-4-hydroxy-dodec-2-enedioic acid-12-O-methyl ester and a new benzophenone, ethyl （S）-3-[2- （3,4-dihydroxybenzoyl）-4,5-dihydroxyphenyl]-2-hydroxypropanoate, together with a known c...A novel alkenoic acid ester, （E）-4-hydroxy-dodec-2-enedioic acid-12-O-methyl ester and a new benzophenone, ethyl （S）-3-[2- （3,4-dihydroxybenzoyl）-4,5-dihydroxyphenyl]-2-hydroxypropanoate, together with a known compound, （E）-4-hydroxy-dodec-2- enedioic acids were isolated from the roots of Ranunculus ternatus. Their structures were elucidated by spectroscopic methods.展开更多
The novel and facile one-pot method for sulfonyloxylactonization of alkenoic acids was reported： when （diacetoxyiodo）- benzene, various 4-pentenoic acids or 5-hexenoic acid and sulfonic acids were mixed in CH2Cl2 a...The novel and facile one-pot method for sulfonyloxylactonization of alkenoic acids was reported： when （diacetoxyiodo）- benzene, various 4-pentenoic acids or 5-hexenoic acid and sulfonic acids were mixed in CH2Cl2 at room temperature, sulfonyloxylactons were obtained in good to excellent yields in short times, some had two diastereoisomers.展开更多
The convenient one-pot method for phosphoryloxylactonization of alkenoic acids was reported：when（diacetoxyiodo）benzene, various 4-pentenoic acids and phosphates were mixed in CH_3CN at room temperature,phosphorylox...The convenient one-pot method for phosphoryloxylactonization of alkenoic acids was reported：when（diacetoxyiodo）benzene, various 4-pentenoic acids and phosphates were mixed in CH_3CN at room temperature,phosphoryloxylactones were obtained in good to excellent yields in short times,some had two diastereoisomers.展开更多
The effective chlorolactonization of alkenoic acids with（diacetoxyiodo）benzene and lithium chloride under mild conditions have been studied.Experiments show that various 4-pentenoic acids react with（diacetoxyiodo）...The effective chlorolactonization of alkenoic acids with（diacetoxyiodo）benzene and lithium chloride under mild conditions have been studied.Experiments show that various 4-pentenoic acids react with（diacetoxyiodo）benzene and lithium chloride fluently in CH_3OH at room temperature,obtaining five-membered chlorolactones in good yields in short times.Other alkenoic acids,such as 3-butenoic acid and trans 3-hexenoic acid give some more complicated results,and 4-pentynoic acid provides a chloroenol lactone with Z configuration in 40%of yield.展开更多
文摘A novel alkenoic acid ester, （E）-4-hydroxy-dodec-2-enedioic acid-12-O-methyl ester and a new benzophenone, ethyl （S）-3-[2- （3,4-dihydroxybenzoyl）-4,5-dihydroxyphenyl]-2-hydroxypropanoate, together with a known compound, （E）-4-hydroxy-dodec-2- enedioic acids were isolated from the roots of Ranunculus ternatus. Their structures were elucidated by spectroscopic methods.
基金the National Science Foundation of China(No.20672100)Zhejiang Province Natural Science Foundation of China(No.Y4080068) are greatly appreciated.
文摘The novel and facile one-pot method for sulfonyloxylactonization of alkenoic acids was reported： when （diacetoxyiodo）- benzene, various 4-pentenoic acids or 5-hexenoic acid and sulfonic acids were mixed in CH2Cl2 at room temperature, sulfonyloxylactons were obtained in good to excellent yields in short times, some had two diastereoisomers.
基金support from the Zhejiang Province Natural Science Foundation of China(No.Y4080068) is greatly appreciated
文摘The convenient one-pot method for phosphoryloxylactonization of alkenoic acids was reported：when（diacetoxyiodo）benzene, various 4-pentenoic acids and phosphates were mixed in CH_3CN at room temperature,phosphoryloxylactones were obtained in good to excellent yields in short times,some had two diastereoisomers.
基金Financial support from the Zhejiang Province Natural Science Foundation of China(No.Y4080068)
文摘The effective chlorolactonization of alkenoic acids with（diacetoxyiodo）benzene and lithium chloride under mild conditions have been studied.Experiments show that various 4-pentenoic acids react with（diacetoxyiodo）benzene and lithium chloride fluently in CH_3OH at room temperature,obtaining five-membered chlorolactones in good yields in short times.Other alkenoic acids,such as 3-butenoic acid and trans 3-hexenoic acid give some more complicated results,and 4-pentynoic acid provides a chloroenol lactone with Z configuration in 40%of yield.
