Process for the preparation of 2-aminodithiothiazoles and 2-amin

Details Process for the preparation of 2-aminodithiothiazoles and 2-amin Process for the preparation of 2-aminodithiothiazoles and 2-amin

1991-10-15

1992-06-23

Ramsuer, Robert W.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

540603, 544368, 546198, C07D41712

Patent

active

051244500

ABSTRACT:
2-(aminodithio)thiazoles and 2-(aminotrithio)thiazoles are prepared by reacting a mixture of a 2-mercaptothiazole or a dithiazolyl 2,2'-disulphide with a saturated secondary heterocyclic amine and sulphur in a reaction medium containing an inert organic solvent in the presence of an oxidant. The reaction is carried out in the present of ammonia and a catalyst containing copper, a copper compound or a cerium compound, and the oxidant is molecular oxygen or a gas containing oxygen. In particular, 2-(4-morpholinodithio)benzo-thiazole, which is technically interesting as a vulcanization accelerator, can be prepared in high product yield and virtually without by-products using the oxidant which is less expensive and can be handled with greater ease.

REFERENCES:
patent: 2983726 (1961-05-01), Hendry
patent: 3281418 (1966-10-01), Budd et al.
patent: 3489754 (1970-01-01), D'Amico
patent: 3969350 (1976-07-01), D'Amico et al.
patent: 4182873 (1980-01-01), Janin

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