Process for preparing nematicidal benzoxazole and benzthiazole c

Details Process for preparing nematicidal benzoxazole and benzthiazole c Process for preparing nematicidal benzoxazole and benzthiazole c

1994-12-29

1995-09-19

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548221, C07D27774, C07D26358

Patent

active

054516811

ABSTRACT:
A process for preparing a compound of formula (I) ##STR1## wherein X is oxygen or sulphur, by (a) reacting a substituted ortho-nitro or -nitroso phenol or a substituted ortho-nitro or -nitroso thiophenol with an alkali metal dithionite reducing agent in an alkaline reaction medium in the presence of carbon disulphide, to form a substituted 2-mercaptobenz-oxazole or -thiazole, acidifying the reaction mixture and collecting the 2-mercaptobenz-oxazole or -thiazole; and then (b) reacting the 2-mercaptobenz-oxazole or -thiazole with a compound of formula (IV)

REFERENCES:
patent: 4724072 (1988-02-01), Bornengo et al.

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