Synthesis of 2,3-Disubstituted Pyrroles and Pyridines from 3-Halo-1-azaallylic Anions
作者:Wim Aelterman、Norbert De Kimpe、Vladimir Tyvorskii、Oleg Kulinkovich
DOI:10.1021/jo000724t
日期:2001.1.1
A new synthesis of 2,3-disubstituted pyrroles and pyridines is described. The reaction of 3-halo-1-azaallylic carbanions, regiospecifically generated from alpha-halogenated ketimines, with omega-iodoazides led to the regiospecific formation of omega-azido-alpha-haloketimines. Treatment of these functionalized imines with tin(II) chloride afforded halogenated five- and six-membered cyclic imines, which
描述了2,3-二取代的吡咯和吡啶的新合成。从α-卤代酮亚胺产生的区域特异性的3-卤-1-氮杂烯丙基碳负离子与ω-碘叠氮化物的反应导致ω-叠氮基-α-卤代亚胺的区域特异性形成。用氯化锡(II)处理这些官能化的亚胺得到卤化的五元和六元环状亚胺,其在温和条件下转化为2,3-二取代的吡咯和吡啶。还报道了2,3-二烷基-3-氯-1-吡咯啉的立体选择性还原,得到顺式2,3-二烷基-3-氯吡咯烷。