Process for the preparation of 2,6-dichlorobenzoxazole

Details Process for the preparation of 2,6-dichlorobenzoxazole Process for the preparation of 2,6-dichlorobenzoxazole

1985-02-21

1987-04-14

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260694, C07D26354

Patent

active

046580344

ABSTRACT:
A process for the preparation of 2,6-dichlorobenzoxazole, which comprises reacting 6-chlorobenzoxazolone in the presence of chlorine, phosphorus trichloride and phosphoryl chloride, or in mixtures of phosphorus pentachloride and phosphoryl chloride, at temperatures of 150.degree. to 170.degree. C., under pressure, the weight ratio of chlorine and phosphorus trichloride to phosphoryl chloride or of phosphorus pentachloride to phosphoryl chloride being 0.15:1 to 0.60:1.

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