Process for the preparation of 3-chlorophthalide

Details Process for the preparation of 3-chlorophthalide Process for the preparation of 3-chlorophthalide

1982-05-06

1984-05-01

Chan, Nicky

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30777

Patent

active

044463278

ABSTRACT:
A process is provided for the direct hydrolysis of pentachloro-o-xylene to 3-chlorophthalide in high yield and high purity by carrying out the hydrolysis with 2 mols of water in the presence of a catalyst at a temperature above 100.degree. C., proportioning the water uniformly during the reaction time so that it immediately reacts completely and does not leave the reaction vessel in vapor form.

REFERENCES:
patent: 2748161 (1956-05-01), Head et al.
patent: 3663575 (1972-05-01), Roos et al.
patent: 3787447 (1974-01-01), Raoul
Ralyohn, Journ. Amer. Chem. Soc., vol. 76, pp. 5479-5481 (1954).

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