Dimercapto-p-xylene

A mixture of 3,3-dimercapto-l-p-phenylthiophenyl-2-propen-l-one, o-phenylene-diamine, and xylene refluxed 3 hrs. under a stream of Ng ->- 4-p-phenylthiophenyl-l,3-dihydro-2H-l,5-benzodiazepin-2-thione. Y 90%. F. e. s. D. Nardi et al., Far-maco, Ed. Sci. 30, 248, 727 (1975). 

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