METHOD FOR PRODUCING FLUORESCENT BRIGHTENING AGENT

PROBLEM TO BE SOLVED: To obtain the subject distyryl-biphenyl compound useful as a fluorescent brightening agent or its precursor by rearranging a hydrazobenzene compound, diazotizing the reaction product, and subsequently reacting the obtained diazonium compound with a styrene compound. SOLUTION: A...

Full description

Saved in:
Bibliographic Details
Main Authors WYSER PHILIPP, KANERT WERNER, SCHNYDER ANITA, INDOLESE ADRIANO, ELIU VICTOR
Format Patent
LanguageEnglish
Published 22.12.1998
Edition6
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To obtain the subject distyryl-biphenyl compound useful as a fluorescent brightening agent or its precursor by rearranging a hydrazobenzene compound, diazotizing the reaction product, and subsequently reacting the obtained diazonium compound with a styrene compound. SOLUTION: A hydrazobenzene compound is rearranged and subsequently diazotized, and the obtained compound of formula I (Z is H, a 1-4C alkyl, or the like; G1 is a counter ion) (e.g. benzidine bisdiazo) is arylated with two moles of a styrene compound of formula II (X is H, a halogen or the like), (e.g. 2-styrene sulfonic acid) in the presence of a palladium catalyst precursor (e.g. palladium chloride) and a base (sodium acetate) in an organic solvent (e.g. alcohol) at -10 to 100 deg.C, preferably 0-80 deg.C, to obtain the objective compound of formula III in a high yield from the safer starting materials.
Bibliography:Application Number: JP19980114455