Chiral a-P,N ligands from a diastereoselective Ph2PH addition to (eta 6-benzaldimine)tricarbonylchromium complexes

Chiral a-aminophosphane (a-P-C-N) ligands have been CH3O, CH3 or p-CH3OC6H4; Cl, C6H5), with complete prepared by reversible addition of Ph2PH to tri- diastereoselectivity. These complexes are stabilized in carbonylchromium benzaldimine complexes (CO)3Cr[eta 6-o- solution by electron-withdrawing group(s) on the imine. C6H4(Y)(CH=NR)] (with Y, R = CH3, CH3 or CH2COOCH3