Regio- and Stereoselective Dirhodium(II)-Catalysed Intramolecular C−H Insertion Reactions ofα-Diazo-α-(dialkoxyphosphoryl)acetamides and -acetates
作者:Pedro M. P. Gois、Carlos A. M. Afonso
DOI:10.1002/ejoc.200300330
日期:2003.10
α-Diazo-α-(dialkoxyphosphoryl)acetates and -acetamides afforded α-(dialkoxyphosphoryl)lactones and lactams, respectively, in moderate to high yields through dirhodium(II)-catalysed intramolecularcarbon−hydrogeninsertion reactions. In the case of α-diazo-α-(dialkoxyphosphoryl)acetamides a remarkable preference for the formation of γ-lactam was observed, with stereocontrol in favour of the trans diastereomer