ISSN:
0894-3230
Keywords:
benzothiazole-2-thiol
;
formation mechanism
;
Chemistry
;
Theoretical, Physical and Computational Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The formation of benzothiazole-2-thiol from aniline, carbon disulphide and sulphur at 230°C was shown to occur by a sequence of three principal steps. Labelling experiments confirmed that both sulphur atoms originate from carbon disulphide. An initial polar reaction to form thiocarbanilide via phenylcarbamic acid and a tetrahedral intermediate is followed by radical cyclization of these to benzothiazole-2-thiol and 2-phenylaminobenzothiazole; the latter is converted into the desired product by a polar displacement of aniline by H2S. Mechanisms for the formation of minor byproducts are also considered. © 1998 John Wiley & Sons, Ltd.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
