Synthesis of Quinolines and 2<i>H</i>-Dihydropyrroles by Nucleophilic Substitution at the Nitrogen Atom of Oxime Derivatives
作者:Koichi Narasaka、Mitsuru Kitamura、Masayuki Yoshida、Takashi Kikuchi
DOI:10.1055/s-2003-42439
日期:——
Isomerization of oxime derivatives was researched in detail to find out the methods for the syn-anti isomerization of O-substituted oximes. Based on these findings were developed simple methods for the preparation of aza-heterocycles from both stereoisomers of oximes. Quinolines were synthesized from β-aryl ketone oximes by treatment with trifluoroacetic anhydride and 4-chloranil. γ,δ-Unsaturated O-methoxyacetyloximes were transformed to 2H-dihydropyrroles by reaction with methoxy-acetic acid.
详细研究了肟衍生物的异构化,以探索O-取代肟的顺反异构化方法。基于这些发现,开发了从肟的立体异构体中简单制备氮杂环的方法。通过用三氟乙酸酐和四氯苯醌处理β-芳基酮肟,合成了喹啉。γ,δ-不饱和O-甲氧基乙酰肟在甲氧基乙酸的作用下转化为2H-二氢吡咯。