960化工网
Organocatalytic enantioselective formal synthesis of bromopyrrole alkaloidsvia aza-Michael addition†
Su-Jeong Lee,Seok-Ho Youn,Chang-Woo Cho
Organic & Biomolecular Chemistry Pub Date : 08/23/2011 00:00:00 , DOI:10.1039/C1OB06078C
Abstract

An unprecedented organocatalytic enantioselective formal synthesis of bromopyrrole alkaloid natural products is reported. An organocatalytic aza-Michael addition using pyrroles as the N-centered nucleophile is utilized as the enantioselective step to construct the nitrogen-substituted stereogenic carbon center in bromopyrrole alkaloids in good yield and excellent enantioselectivity. The aza-Michael product is converted via lactamization using a Staudinger-type reductive cyclization to the key intermediate, which was previously used in the total synthesis of bromopyrrole alkaloid natural products.

Graphical abstract: Organocatalytic enantioselective formal synthesis of bromopyrrole alkaloidsvia aza-Michael addition
平台客服
平台客服
平台在线客服