Transition-Metal-Free Synthesis of Substituted Pyridines via Ring Expansion of 2-Allyl-2<i>H-</i>azirines
作者:Yaojia Jiang、Cheol-Min Park、Teck-Peng Loh
DOI:10.1021/ol501010k
日期:2014.7.3
good to excellent yields is reported. The reaction displays a broad substrate scope and good tolerance to a variety of substituents including aryl, alkyl, and heterocyclic groups. In addition, one-pot synthesis of pyridines from oximes via in situ formation of 2H-azirines was achieved.
一种在无金属条件下通过1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)促进作用打开2-烯丙基2 H-叠氮基的新策略,该方法可将1-氮杂环丁烷原位电环化为吡啶据报道收率良好。该反应显示出广泛的底物范围和对包括芳基,烷基和杂环基团在内的各种取代基的良好耐受性。另外,通过原位形成2 H-叠氮基,从肟一锅合成吡啶。