Reaction of α-Haloketones with<i>ortho</i>-Dihydroxy-2<i>H</i>-1-benzopyran-2-ones. Formation of α-Pyrano-1,5-benzodioxapines-A New Heterocyclic System
作者:Avula Prashant、Gazaula DavidKrupadanam、Roberto R. Gil、Lee-Juian Lin、Geoffrey A. Cordell
DOI:10.1080/00397919608004791
日期:1996.12
Abstract Reaction of 7,8-dihydroxy-2H-1-benzopyran-2-one, and its 4-methyl derivative, with α-haloketones affords α-pyrano-1,5-benzodioxapines, while 3-chloro-4-methyl-7,8-dihydroxy-2H-1-benzopyran-2-one gives α-pyrano-1,4-benzodioxane. The structures of the compounds were deduced using a combination of 1H nmr, 13C nmr (BB, DEPT), HETCOR, NOESY, and selective INEPT techniques and molecular modeling
摘要 7,8-二羟基-2H-1-苯并吡喃-2-one 及其4-甲基衍生物与α-卤代酮反应生成α-吡喃-1,5-苯并二氧杂茚,而3-氯-4-甲基- 7,8-二羟基-2H-1-苯并吡喃-2-one 生成 α-吡喃-1,4-苯并二恶烷。化合物的结构是使用 1H nmr、13C nmr (BB, DEPT)、HETCOR、NOESY 和选择性 INEPT 技术和分子建模的组合推导出来的。