Abstract
Reaction of N-acyI-3,3-diamino-2-nitroacrylthioamides 1 with MeI at room temperature leads to N-acyl-S-methyl-3,3-diamino-2-nitroacrylthioimidates 2 in moderate yields. The latter react with Hg(OAc)2 in DMF yielding 3-(acylamino)-3-amino-2-nitroacrylonitriles 8. The structures of 2a and 8a were established by X-ray crystallography.