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
Radical cyclisation of amino aldehydes leading to hydroxy pyrrolidines and piperidines
作者:Andrew F. Parsons、Robert M. Pettifer
DOI:10.1016/s0040-4039(97)01316-6
日期:1997.8
The cyclisation of amino aldehydes using Bu3SnH in boiling benzene is reported. The reaction proceeds via addition of a tributyltin radical to the aldehyde forming an O-stannyl ketyl and radical cyclisation onto electron poor or rich double bonds gives rise to hydroxy pyrrolidines and piperidines.