branched allylsilanes were formed by judicious choice of solvents. Furthermore, branched allylsilanes were obtained with high enantioselectivity (up to 97% enantiomericexcess) with the aid of a C2-symmetric bisphosphine ligand in the unprecedented asymmetric allene hydrosilylation.
Monooxygenase-like oxidations of olefins and alkanes catalyzed by manganese porphyrins : comparison of systems involving either O2 and ascorbate or iodosylbenzene
作者:Marc Fontecave、Daniel Mansuy
DOI:10.1016/s0040-4020(01)98805-2
日期:——
Regioselectivity of olefin oxidation by iodosobenzene catalyzed by metalloporphyrins : control by the catalyst
importance of these reactions greatly depends upon both the metal and porphyrin constituents of the catalyst. More particularly, the competition between epoxidation and allylic hydroxylation can be efficiently controlled by non-bonded interactions between the olefin and porphyrin substituents. No hydroxylation of the aromatic rings and no oxidative dealkylation of the ether function was detected.