Patent ID: 8058329
Filing Date: 2011-11-15
Classification: C07D,C07F,C08G,C09K

Abstract:
1. A process for preparation of nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides of Formulae (I) and (II) wherein R is one of the following radicals: wherein l is an integer of from 2 to 10, m and p are integers of from 1 to 20, n and o are each 0 or are integers from 1 to 20 and R′ is hydrogen or an alkyl group wherein: (a) a 6-alkoxy-6H-dibenz[c,e][1,2]-oxaphosphorine is reacted with a bishydroxyalkyl amine or a polyvalent alcohol formed by polycondensation of 1,3,5-tris(2-hydroxyethyl)cyanuric acid, to form an intermediate product and (b) said intermediate product obtained in step (a) is converted by adding a catalytic amount of an alkylating agent to a nitrous bridged 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxide derivative of the Formula (I) or (II).