Tandem <i>N</i>,<i>N</i>-Dialkylation Reaction of <i>N</i>-Trimethylsilyl α-Iminoesters Utilizing an Umpolung Reaction and Characteristics of the Silyl Substituent: Synthesis of Pyrrolidine, Piperidine, and Iminodiacetate
作者:Isao Mizota、Yurie Tadano、Yusuke Nakamura、Tomoki Haramiishi、Miyuki Hotta、Makoto Shimizu
DOI:10.1021/acs.orglett.9b00654
日期:2019.4.19
with organometallics gave directly N-alkylaminoesters in high yields without the need for removing a protecting group at the nitrogen atom. Efficient syntheses of pyrrolidines, piperidines, and iminodiacetate derivatives were also developed via tandem N,N- or N,C-dialkylation reactions utilizing characteristics of the silyl substituent. Furthermore, under the influence of silica gel, the addition of
N-三甲基甲硅烷基α-亚氨基酯与有机金属的Umpolung反应可以高产率直接得到N-烷基氨基酯,而无需除去氮原子上的保护基。吡咯烷,哌啶和亚氨基二乙酸酯衍生物的有效合成还通过串联的N,N-或N,C-二烷基化反应,利用甲硅烷基取代基的特性来开发。此外,在硅胶的影响下,向亚氨基氮中加入烯醇化物以得到亚氨基二乙酸酯衍生物。