Patent ID: 7378556
Filing Date: 2008-05-27
Classification: C07F,C08G,C08L,G02B

Abstract:
1. A process for making a thiophosphine compound of formula (I): wherein X represents SH or  with R wherein y=1, X is in para position with regard to phosphorus and represents —SH, the process comprising: a) reacting in the presence of a catalyst a component A of formula: in which R′, n′ and x are defined above with a component B of formula: in which R and n are defined above and G is a blocking radical of the SH function, the molar ratio of components A to B being:  in which R′, n′, R, n, and x are defined above; c) reacting compound C with elemental sulphur; d) isolating from step c) an intermediate compound D of formula:  in which R′, n′, R, n, and x are defined above; e) reacting intermediate compound D with an alkaline thiolate in a solvent under reflux; and f) isolating from step e) a thiophosphine monomer of formula (I).