A Convenient Synthesis of Amides with 2-Halo-2,3-dihydro-1,3,4,2-oxadiazaphospholes as New Condensing Agents.
作者:Hiroshi Kimura、Hidetoshi Konno、Naomichi Takahashi
DOI:10.1246/bcsj.66.327
日期:——
Various amides, including some with bulky substituents, are prepared in good yields from free carboxylic acids and amines under mild conditions by a one-step method using new condensing agents 2-halo-2,3-dihydro-1,3,4,2-oxadiazaphospholes, especially 5-methyl-2-chloro-3-phenyl-2,3-dihydro-1,3,4,2-oxadiazaphosphole.
使用新型缩合剂2-卤代-2,3-二氢-1,3,4,2-氧二氮磷杂(2-halo-2,3-dihydro-1,3,4,2-oxadiazaphospholes),特别是5-甲基-2-氯-3-苯基-2,3-二氢-1,3,4,2-氧二氮磷杂(5-methyl-2-chloro-3-phenyl-2,3-dihydro-1,3,4,2-oxadiazaphosphole),通过一步法在温和条件下,可以从游离羧酸和胺类以良好产率制备各种酰胺,包括一些带有大体积取代基的酰胺。