A new method for the preparation of β-(alkylamino)-carbonyl compounds by rearrangement of β-chloroimines via azetidine intermediates
作者:Paul Sulmon、Norbert De Kimpe、Niceas Schamp
DOI:10.1016/s0040-4020(01)80122-8
日期:1989.1
in methanol gave rise to β-(alkylamino)- and β-(arylamino)-carbonyl compounds in high yield. The reaction mechanism for the generation of β-(alkylamino)- and β-(arylamino)-carbonyl compounds passes via an intermediate α-methoxyazetidine which is, after ringopening, transformed into a β-(alkylamino)- or β-(arylamino)-carbonyl compund. Only one 2-methoxyazetidine (2-methoxy-2,3,3-trimethyl-1-phenylazetidine)
β-氯亚胺与甲醇钠在甲醇中的反应以高收率产生了β-(烷基氨基)-和β-(芳基氨基)-羰基化合物。生成β-(烷基氨基)-和β-(芳基氨基)-羰基化合物的反应机理是通过中间体α-甲氧基氮杂环丁烷进行的,该中间体在开环后转化为β-(烷基氨基)-或β-(芳基氨基) -羰基化合物。在给定的反应条件下,只能分离出一种2-甲氧基氮杂环丁烷(2-甲氧基-2,3,3-三甲基-1-苯基氮杂环丁烷)。β-氯亚氨基与叔丁醇钾在叔丁醇或四氢呋喃中反应也可生成β-烷基氨基羰基化合物。后者的反应由闭环后的去质子作用引发,生成2-亚甲基氮杂环丁烷,