Transmetallation of n-(trialkylstannyl)methylimines. A new method for the generation and cycloaddition of 2-azaallyl anions.
作者:William H. Pearson、Daniel P. Szura、William G. Harter
DOI:10.1016/s0040-4039(00)80203-8
日期:1988.1
Transmetallation of imines 1 at −78° with RLi provided 2-azaallyl anions 2, which readily undergo cycloaddition with olefinic anionophiles, providing pyrrolidines. Of particular note is the generation of unstabilized 2-azaallyl anions for the first time (Table 1, entries 1–3).
亚胺1在-78°上用RLi进行金属转移提供了2-氮杂烯丙基阴离子2,该2氮杂烯丙基阴离子2易于与烯属阴离子亲和剂进行环加成反应,从而提供了吡咯烷。特别值得注意的是,首次生成了不稳定的2-氮杂烯丙基阴离子(表1,条目1-3)。