Rh(<scp>ii</scp>) catalysed intramolecular C–H insertion of diazo substrates in water: a simple and efficient approach to catalyst reuse
作者:Nuno R. Candeias、Pedro M. P. Gois、Carlos A. M. Afonso
DOI:10.1039/b414233k
日期:——
Water is an efficient solvent for the Rh2(OAc)4 catalysedintramolecular C-H insertion of a range of diazo substrates without competitive water insertion. Due to the high solubility and stability of the catalyst in water, the catalyst can be efficiently reused.
Regio- and Stereocontrol Elements in Rh(II)-Catalyzed Intramolecular C−H Insertion of α-Diazo-α-(phenylsulfonyl)acetamides
作者:Cheol Hwan Yoon、Michael J. Zaworotko、Brian Moulton、Kyung Woon Jung
DOI:10.1021/ol016647l
日期:2001.11.1
see text]. Intramolecular C-H insertion reaction of alpha-diazo-alpha-(phenylsulfonyl)acetamides proceeded with high regio- and stereoselectivities to afford highly functionalized gamma-lactams predominantly or exclusively. The high regioselectivity was attributed to the use of the phenylsulfonyl moiety, which altered electron density at the carbenoid center and exerted a steric effect during the insertion
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.