Lewis acid catalyzed Claisen rearrangement: Regioselective synthesis of oxygen, nitrogen, and sulfur heterocycles
作者:K C Majumdar、A K Pal
DOI:10.1139/v07-139
日期:2008.1.1
nitrogen, and sulfur has been achieved in good to excellent yields by the sequential Claisen rearrangement of but-2-ynyl ethers and sulfides containing quinolone moiety. The substrates ethers and sulfides were prepared from 1-aryloxy-4-chlorobut-2-ynes with N-alkyl-4-hydroxyquinoline-2(1H)-ones.Key words: regioselectivity, [3,3] sigmatropic rearrangement, nucleophilicity of sulfur, aluminium chloride
通过丁-2-炔基醚和含有喹诺酮部分的硫化物的连续克莱森重排,已经实现了含有氧、氮和硫的五环杂环的区域选择性合成,产率非常好。底物醚和硫化物由 1-芳氧基-4-氯丁-2-炔与 N-烷基-4-羟基喹啉-2(1H)-酮制备。 关键词: 区域选择性, [3,3] σ 重排, 亲核性硫、氯化铝、杂环。