Patent ID: 6362358
Filing Date: 2002-03-26
Classification: C07F

Abstract:
A process for preparing a phosphonite or phosphinite of general formula (I) where aryl is a substituted or unsubstituted aryl or heteroaryl radical; R is any organic radical having 5-36 carbon atoms, which can also contain hetero atoms; and A is either R or OR, the process comprising:reacting a product of a Friedel-Crafts reaction of general formula (II) where aryl has the meaning above; Hal is halogen; and Aâ€² is either Hal or R, with a compound of general formula (III)Râ€”OHâ€ƒâ€ƒ(III) where R has the meaning above, and separating off a majority of insoluble byproducts formed during the reaction, characterized in that an aftertreatment is carried out wherein the aftertreatment comprises:addinga) a protic compound selected from the group consisting of alcohols, ammonia, primary amines, secondary amines and water, or b) an oxide, hydroxide, (hydrogen)carbonate or (hydrogen)phosphate of a metal, or c) a nitrogen containing compound selected from the group consisting of carbonic acid amides, thiocarbonic acid amides, carbonic acid imides, thiocarbonic acid imides, lactames, thiolactames, carbonic acid hydrazides, urea, thiourea, symmetrically and asymmetrically substituted urea and thiourea derivatives, urethanes, uretimides, guanidine and its salts and melamine and derivatives thereof, including polymeric compounds of all named classes, or d) any combination of one or more of the compounds of a) to c), wherein the addition of a) to d) is carried out in the absence of a solvent or in an inert, nonpolar solvent and finally separating off resulting byproducts from the reaction mixture.