A Concise Route to Pyridines from Hydrazides by Metal Carbene N−H Insertion, 1,2,4-Triazine Formation, and Diels−Alder Reaction
作者:Baolu Shi、William Lewis、Ian B. Campbell、Christopher J. Moody
DOI:10.1021/ol901502u
日期:2009.8.20
three-step sequence for the conversion of hydrazides into pyridines is reported in which the key steps are N−H insertion by a copper carbene intermediate derived from α-diazo-β-ketoesters into the hydrazide, reaction with ammonium acetate to give 1,2,4-triazines, followed by Diels−Alder reaction with norbornadiene.
据报道,酰肼转化为吡啶的简单,新的三步过程,其中关键步骤是将衍生自α-重氮-β-酮酸酯的铜卡宾中间体将N-H插入酰肼中,并与乙酸铵反应生成氨。得到1,2,4-三嗪,然后与降冰片二烯进行狄尔斯-阿尔德反应。