Synthesis of tailor-made 1-aryl-2-arylamino-4-imino-1,4,5,6-tetrahydro-1,3,5-triazine-6-thiones

Reaction of 1-amidino-3-arylthioureas (1) with aryl isothiocyanates yielded 1-aryl-2-arylamino-4-imino-1,4,5,6-tetrahydro-1,3,5-triazine-6-thiones (3) which contained the more electron releasing aryl substituent at the ring nitrogen. The reaction of the S-benzyl derivatives of (1) with aryl isothiocyanates could be directed to give the same type of triazinethione derivatives but with the desired aryl substituent at the ring nitrogen.