Patent ID: 6031126
Filing Date: 2000-02-29
Classification: C07C

Abstract:
A process for the production of a compound of formula: ##STR17## in which X is hydrogen, halogen, NO.sub.2, CF.sub.3, CN, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, COO--C.sub.1 -C.sub.4 alkyl, CO--C.sub.1 -C.sub.4 alkyl, NH-(C.sub.1 -C.sub.4 alkyl), N(C.sub.1 -C.sub.4 alkyl).sub.2, NH(C.sub.1 -C.sub.4 alkyl-OH), N(C.sub.1 -C.sub.4 alkyl-OH).sub.2, COOH or SO.sub.3 H or an ester or amide thereof, or COOM or SO.sub.3 M in which M is Na, K, Ca, Mg, ammonium, mono-, di-, tri- or tetra-C.sub.1 -C.sub.4 alkylammonium, mono-, di- or tri-hydroxyalkylammonium or ammonium that is di- or tri-substituted with a mixture of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 hydroxyalkyl groups;Z is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, CF.sub.3, halogen (F, Cl, Br, I), SO.sub.3 H or SO.sub.3 M in which M has its previous significance; andn is 1 or 2; comprisingA) rearranging a hydrazobenzene compound having the formula: ##STR18## in which Z has its previous significance, to produce in situ a compound having the formula: ##STR19## B) diazotising the compound of formula (3) to produce a compound having the formula: ##STR20## in which Z has its previous significance and G.sub.1 is a counter ion; and C) reacting the compound of formula (4) with 2 moles of a compound having the formula: ##STR21## in which X and n have their previous significance, in the presence of an inorganic or organic palladium salt, or a mixture thereof, as catalyst-precursor, to produce a compound having the formula (1).