hydroxylamine), an alkene or alkyne dipolarophile and an aldehyde bearing a halide as a leaving group has been developed. Condensation of the amine with the aldehyde and cyclization (intramolecular N-alkylation) provides, after decarboxylation or deprotonation, a cyclic azomethine ylide (or nitrone) that undergoes intermolecular dipolar cycloaddition with the dipolarophile. This sets up, in a single step, the
已经开发了
伯胺(
氨基酸或
氨基酯或
羟胺),烯烃或
炔烃双极性亲和物和带有卤化物作为离去基团的醛的三组分偶联反应。在脱羧或去质子化之后,胺与醛的缩合和环化(分子内N-烷基化)提供了环偶氮甲碱叶立德(或硝酮),该环偶氮
亚胺叶立德(或硝酮)经历了与双极性亲核剂的分子间偶极环加成。根据醛和卤化物之间系链的长度,这一步就建立了双环
吲哚并
咪唑或
吡咯并
咪唑环系统。使用分别由伯
氨基酯或
氨基酸产生的稳定化和非稳定化的甲
亚胺基团可以成功地进行反应。