The unprecedented electrophilic iodo-mediated cyclization of α-amino-ynones afforded enantiomerically enriched β-iodopyrrolin-4-ones in excellent yields under mild conditions. The starting substituted α-amino-ynones were obtained from the chiral pool by selective mono-addition of an organolithium to optically pure N-protected carboxyanhydrides of amino acids (UNCAs).
前所未有的电亲核
碘介导的α-
氨基-炔酮环化反应在温和条件下以优异的产率获得了对映体富集的β-
碘吡咯林-4-酮。起始的取代α-
氨基-炔酮是通过对光学纯的
氨基酸N保护的
羧酸酸酐(UNCA)选择性单加成
有机锂化合物获得的。