Process for the production of distyryl-biphenyl compounds

Details Process for the production of distyryl-biphenyl compounds Process for the production of distyryl-biphenyl compounds

1997-12-19

1999-10-19

Shah, Mukund J.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By dimerization of vinyl aromatic

585435, 585508, 585651, C07C 274, C07C 509, C07C 202, C07C 402

Patent

active

059692049

ABSTRACT:
A process for the production of compounds useful as fluorescent whitening agents of formula: ##STR1## in which X and Y, are as defined herein and n is 1 or 2, comprises A) diazotising one mole of an amine of formula: ##STR2## (2A) to produce a diazonium compound of the formula: ##STR3## (2) in which G.sub.1 is a counter ion; and diazotising one mole of an amine of formula: ##STR4## (3A) to produce a diazonium compound having the formula: ##STR5## (3); and B) reacting one mole of a divinyl compound having the formula: ##STR6## (4) with one mole of a compound having the formula (2) and with one mole of a compound having the formula (3), in the presence of an inorganic or organic palladium salt, or a mixture thereof, as catalyst-precursor.

REFERENCES:
patent: 3984399 (1976-10-01), Weber et al.
patent: 5145991 (1992-09-01), Weber et al.
patent: 5231223 (1993-07-01), Bader et al.
patent: 5516932 (1996-05-01), Beller et al.

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