[Thiourea derivatives of 1,3,4-thiadiazole and their cyclization products]

The synthesis and chemical behaviour of 1-methoxycarbonyl-3-(1,3,4-thiadiazol-2-yl)thyoureas and 7-alkyl-2-methyltio-1,3,4-thiadiazolo [3,2-a]-s-triazine-4-ones is described. All compounds were tested in vitro for their antibacterial activity.