Oxidative radical cyclization on enamide systems using n-Bu3SnH and dilauroyl peroxide
作者:Miguel A. Guerrero、Raymundo Cruz-Almanza、Luis D. Miranda
DOI:10.1016/s0040-4020(03)00764-6
日期:2003.6
Efficient 5-endo and 6-endo oxidative radical cyclizations on enamide systems are described using nBu(3)SnH and dilauroyl peroxide both as initiator and oxidant. Dibenzoyl peroxide and dicumyl peroxide were also tested in the same reaction and the product yields were very similar to those obtained with dilauroyl peroxide. The erythrina ring system was constructed in a two-step sequence featuring this novel process. (C) 2003 Elsevier Science Ltd. All rights reserved.
A Short Synthesis of the Erythrina Skeleton and of (±)-α-Lycorane
作者:Luis D. Miranda、Samir Z. Zard
DOI:10.1021/ol025534e
日期:2002.4.1
[reaction: see text] A new nonchain 5-endo radical cyclization starting with xanthates was exploited in a short synthesis of (+/-)-alpha-lycorane and the erythrina ring system.