Bis-stilbene compounds

Details Bis-stilbene compounds Bis-stilbene compounds

1991-05-23

1993-01-05

Pal, Asok

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

562 85, 562 88, 25230121, C07C14338

Patent

active

051772558

ABSTRACT:
Sulphonic acids of bis-styrylbiphenyls, which are useful optical brighteners, are obtained in good yields in a simple manner by reacting styrene compounds with 4,4'-dibromobiphenyl-3,3'-disulphonic acids or their salts in the presence of bases and palladium catalysts.
The bis-stilbene compounds have the formula: ##STR1## where at least one of the rings A or B contains a sulfonic acid group.

REFERENCES:
patent: 4339238 (1982-07-01), Fringeli et al.
Chemical Abstract 102:76417m (1985).
Chemical Abstract 104:49208d (1986).

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