Mechanism
The initial dissociation of a triphenylphosphine ligand leads to the formation of a 14-electron Rh complex that undergoes oxidative addition with H2 followed by π-complexation with alkene, intramolecular hydride transfer and reductive elimination of the target product (Scheme 3).
Scheme 3
Examples:
L. J. Whalen, R. L. Org. Lett. 2004 , 6 , 3221.
H. M. L. Davies, E. Saikali, N. J. S. Huby, V. J. Gilliatt, J. J. Matasi, T. Sexton, S. R. Childers, J. Med. Chem. 1994 , 37 , 1262.