Method of preparing 2-mercaptobenzothiazole and benzothiazole

Details Method of preparing 2-mercaptobenzothiazole and benzothiazole Method of preparing 2-mercaptobenzothiazole and benzothiazole

1993-05-17

1994-01-04

Lee, Mary C.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548175, C07D20902

Patent

active

052762068

ABSTRACT:
2-mercaptobenzothiazole and benzothiazole are prepared from dibenzothiazyl disulphide by reacting dibenzothiazyl disulphide in the presence of an alkali and/or alkaline earth hydroxide solution at temperatures from 40.degree. to 120.degree. C. until a constant pH value in the range from 8 to 10 has been reached, then treating the reaction mixture with an aqueous solution of mineral acids at temperatures from 10.degree. to 100.degree. C., and subsequently removing benzothiazole by distillation or extraction from the reaction mixture containing 2-mercaptobenzothiazole.

REFERENCES:
patent: 4429134 (1984-01-01), Papenfuhs
CA 116:108044v Differential . . . polyisoprene, Luyt, p. 87, 1992.

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