Patent ID: 7094931
Filing Date: 2006-08-22
Classification: C07F

Abstract:
1. A process for the preparation of acylphosphine oxides and acylphosphine sulfides of formula IV wherein n is 1 or 2; when n is 1, m is 1; when n is 2, m is 1 or 2; R C R C R R R phenyl-substituted C Q is a single bond, CR R R Z is O or S, by (1) reacting organic phosphorus halides of formula II wherein Y is Br or Cl and R with an alkali metal or with magnesium in combination with lithium, or with mixtures thereof, optionally in the presence of a catalyst, and (2) subsequent reaction with m equivalents of acid halides of formula III wherein R (3) oxidation or reaction with sulfur of the acylphosphine of formula I which is obtained by reaction (2), wherein R which process is carried out without isolation of the intermediates.