Process for the preparation of 4,7-dichloro-3-hydroxy-thionaphth

Details Process for the preparation of 4,7-dichloro-3-hydroxy-thionaphth Process for the preparation of 4,7-dichloro-3-hydroxy-thionaphth

1982-06-01

1984-06-26

Siegel, Alan

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D33352

Patent

active

044567626

ABSTRACT:
The invention provides a process for the preparation of 4,7-dichloro-3-hydroxy-thionaphthene by reaction of 2,5-dichlorophenyl-thioglycolic acid chloride in dichloromethane in the presence of Friedel-Crafts catalysts.

REFERENCES:
patent: 1913484 (1931-05-01), Haller
patent: 2158032 (1939-05-01), Lubs et al.

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