| Abstract: | Cyanic Acid Esters. 25 The Reaction of Mercapto-N-heterocycles with Aryl Cyanates Unsaturated N-heterocycles containing a cyclic thio urea structure and aryl cyanates (molar ratio 1:2), react to form azolo(1,2-d) (1,2,4)thiadiazoles. This reaction has a wide scope concerning starting materials and gives good yields. Under the same conditions 2-thione-benzthiazolin is transformed to the corresponding disulfide. 4,5-Bis-mercaptomethylene-o-xylene and aryl cyanates give 2,3-dithia-6, 7-dimethyl-tetraline. |
