Synthesis of Alkyl- and Aryl-Substituted Pyridines from (α,β-Unsaturated) Imines or Oximes and Carbonyl Compounds
作者:Robert J. Vijn、Henricus J. Arts、Richard Green、Anna M. Castelijns
DOI:10.1055/s-1994-25526
日期:——
Reaction of a variety of (α,β-unsaturated) imines or oximes with aliphatic aldehydes or cyclic ketones in the presence of a secondary amine afforded alkyl-, and/or aryl-, and/or cycloalkyl-substituted pyridines.1 To explain their formation, a hetero Diels-Alder reaction has been postulated, in which an 1-aza-1,3-butadiene reacts with an in situ generated enamine.
在存在二级胺的条件下,各种(α,β-不饱和)亚胺或肟与脂肪族醛或环酮反应,得到烷基-、芳基-和/或环烷基取代的吡啶。为了解释它们的形成,提出了杂Diels-Alder反应,其中1-氮-1,3-丁二烯与现场生成的烯胺反应。