Nickel powder promoted 5-endo radical cyclisations. A concise approach to Erythrina alkaloids
作者:Jérôme Cassayre、Béatrice Quiclet-Sire、Jean-Baptiste Saunier、Samir Z. Zard
DOI:10.1016/s0040-4039(98)02036-x
日期:1998.12
N-Alkenyl trichloroacetamides 3 undergo, upon refluxing with nickelpowder and aceticacid in 2-propanol, exclusive 5-endo-trig cyclisation to afford functionalised lactams 4; these are attractive precursors of erythrina alkaloids, as demonstrated by the expedient synthesis of 3-demethoxyerythratidinone 5.
New Palladium-Catalyzed Reaction Pathway to the <i>Erythrina</i> Skeleton
作者:Guncheol Kim、Jin Hee Kim、Ki Youn Lee
DOI:10.1021/jo052500m
日期:2006.3.1
Palladium-catalyzed arylation of alpha,beta-unsaturated gamma-lactam, which could be prepared by condensation of amines and ketoesters, has been carried out to make the core structure of Erythrina alkaloids.