Rh(II)-Catalyzed Intramolecular C−H Insertion of Diazo Substrates in Water: Scope and Limitations
摘要:
Preferential Rh(II) carbenoid intramolecular C-H versus O-H insertion derived from R-diazo-acetamides can be achieved in water by using an appropriate combination of the catalyst and amide groups, which creates a larger hydrophobic environment around the reactive carbenoid center.
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
Rh(II)-Catalyzed Intramolecular C−H Insertion of Diazo Substrates in Water: Scope and Limitations
作者:Nuno R. Candeias、Pedro M. P. Gois、Carlos A. M. Afonso
DOI:10.1021/jo060397a
日期:2006.7.1
Preferential Rh(II) carbenoid intramolecular C-H versus O-H insertion derived from R-diazo-acetamides can be achieved in water by using an appropriate combination of the catalyst and amide groups, which creates a larger hydrophobic environment around the reactive carbenoid center.