Patent ID: 6509505
Filing Date: 2003-01-21
Classification: B01J,C07C,C07D,C07F

Abstract:
A phosphabenzene compound of the formula (I) where the radicals R1 to R13 are, independently of one another, hydrogen, COOM, SO3M, NR3X, NR2, OR, COOR or SR (where M=hydrogen, NH4 or alkali metal, X=anion, R=hydrogen or C1-C6-alkyl), or C1-C12-alkyl, C6-C12-aryl, C7-C12-aralkyl, C7-C12-alkaryl or C3-C6-heteroaromatics, where the alkyl, aryl, alkaryl and aralkyl radicals optionally substituted by the abovementioned radicals as substituents and two or more of the radicals can optionally be joined to form aliphatic or fused-on rings, where at least one of the radicals R4 and R8 and at least one of the radicals R9 and R13 is not hydrogen.