Synthesis of hydroxy pyrrolidines and piperidines via free-radical cyclisations
作者:Andrew F. Parsons、Robert M. Pettifer
DOI:10.1039/a707740h
日期:——
-piperidines after work-up. Related cyclisations using an alkyne or α,β-unsaturated amide radical acceptor are shown to be problematic and low-yielding. Radical cyclisation of allylic O-stannyl ketyls, generated from reaction of α,β-unsaturated ketones with tin hydride, are also shown to have application in pyrrolidine/piperidine synthesis. A dilution study suggests that the cyclisation onto a cinnamyl