Patent ID: 7790923

Claim:
Process for the production of a phosphorous compound having the structure wherein X is O, N or C; R 1 is an alkylene moiety of 0 to 5 carbon atoms; R 2 is a hydrogen atom or a substituted or unsubstituted alkyl or aryl group; R 3 , R 4 , R 5 and R 6 are independently hydrogen or an optionally substituted aryl or alkyl group; and Z is at least one of in which process wherein X is O, N or C and n and m are independently 0 or 1, is reacted with HY—C(R 6 )—R 1 (R 5 )—Z—R 2 , wherein Y is O or NH, and Z is as defined above, to produce the said phosphorous compound, in the presence of a solid alkaline ion-exchange resin.