摘要
苯并咪唑和香豆素并吡喃衍生物具有重要的生物活性.目前制备兼具苯并咪唑和香豆素并吡喃骨架的杂环化合物尚缺乏有效的方法.报道了在醋酸促进下芳醛、2-氰甲基苯并咪唑和4-羟基香豆素的三组分串联环化反应,合成了一系列3-苯并咪唑啉取代的吡喃并[3,2-c]色烯-2-酮衍生物,收率为58%~84%.该反应采用兼容各种官能化的芳醛,如氯、溴、氰基、甲氧基取代的芳醛以及杂芳醛等,且醋酸既为溶剂又为布朗斯特酸催化剂,为含氧、含氮杂环的合成提供了一种有效的策略.
Both benzimidazoles and pyranochromenes exhibit a variety of important biological activities.However,the effective preparation of compounds incorporating both pyranochromene and benzoimidazole moieties is very rare.In this paper,a HOAc-promoted three-component annulation reaction of aromatic aldehydes with 2-(1 H-benzo[d]imidazol-2-yl)acetonitrile and 4-hydroxy-2 H-chromen-2-one is reported,leading to the formation of a series of 3-benzo[d]imidazol-2(3 H)-ylidene substituted pyrano[3,2-c]chromen-2-ones in 58%~84%yields.The current reaction could tolerate aromatic aldehydes with diverse functional groups such as chloro,bromo,cyano,methoxy and heteroaryl aldehydes,and HOAc served as the reaction media as well as the Br?nsted acid catalyst,thereby providing an effective synthetic method for the construction of N,O-containing heterocyles.
作者
王翔
陈平
支三军
胡华友
阚玉和
唐果东
张载超
Xiang Wang;Ping Chen;Sanjun Zhi;Huayou Hu;Yuhe Kan;Guodong Tang;Zaichao Zhang(Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials,School of Chemistry and Chemical Engineering,Huaiyin Normal University,Huai'an 223300)
出处
《有机化学》
SCIE
CAS
CSCD
北大核心
2021年第3期1241-1245,共5页
Chinese Journal of Organic Chemistry
基金
国家自然科学基金(Nos.51403073,21601061)
江苏省高等学校自然科学研究基金(No.16KJB150006)
江苏省低维材料化学重点实验室开放基金(No.JSKC15145)资助项目。
