New homochiral ketoalcohols from aldol reactions of (+)-isomenthone and reversal of diastereoselectivity
作者:Jameel H. Chughtai、John M. Gardiner、Steven G. Harris、Simon Parsons、David W.H. Rankin、Carl H. Schwalbe
DOI:10.1016/s0040-4039(97)10430-0
日期:1997.12
Aldol reaction of (+)-isomenthone lithium enolate with aryl and alkyl aldehydes proceeds with complete diastereocontrol at the α-carbon (C6), but the stereochemicaloutcome at the secondary alcohol stereocentre (established by X-raycrystalstructuredeterminations) can be unexpectedly reversed by changing reaction quenching temperature. This provides a route to a range of new homochiral ketoalcohols