作者:Markus Kordes、Harald Winsel、Armin de Meijere
DOI:10.1002/1099-0690(200009)2000:18<3235::aid-ejoc3235>3.0.co;2-7
日期:2000.9
Our recently reported titanium-mediated transformation of N,N-dialkylcarboxamides to cyclopropylamines has been applied to N,N-dibenzyl-2-benzyloxyacetamide using a variety of alkylmagnesium bromides to yield 1-(benzyloxymethyl)-1-(dibenzylamino)cyclopropane (15a, 48%) and 2-substituted analogs 15b−f (33−48%). These have been transformed in just a few steps into N-Boc-protected methyl esters of 1-
我们最近报道的钛介导的N,N-二烷基羧酰胺向环丙胺的转化已使用各种烷基溴化镁应用于N,N-二苄基-2-苄氧基乙酰胺,以生成1-(苄氧基甲基)-1-(二苄氨基)环丙烷(15a,48%)和2取代的类似物15b-f(33-48%)。这些已转化在短短步入Ñ 1-氨基环丙烷羧酸(-Boc保护的甲酯1整体,29%),coronamic酸(2,35%)和norcoronamic酸(21%),2,3-甲基谷氨酸(21g,19%)和2,3-甲基鸟氨酸(21l,占12%)。类似地,3,4-亚甲基- γ氨基丁酸(相应的衍生物26,23%)和4-螺环丙烷-γ丁内酰胺(32,44%)已被合成。