STABLE C - (sp3) - CYCLOMETALATED PINCER COMPLEXES, THEIR PREPARATION AND USE AS CATALYSTS

摘要

The invention relates to a novel class of stable pincer complexes comprising a pinσer ligand linked to the metal via a Calfa cyclometalated carbon and via two donor atoms W1 and W2, wherein said Calfa carbon has a sp3 hybridization; said Calfa carbon is bonded to three Cbeta carbons; each of said Cbeta carbons is linked to the non-hydrogen atoms,- and W1 and W2 are independently selected from P, As, N or O. Said complexes are used as catalyst in transfer hydrogenation reactions such as reduction of ketones, reductions of imines and reductions of olefines.