alpha-Thiocarbonylthioformmorpholines (2a-2c) have been synthesized, Compou
nd 2a can react with o-diaminobenzene, aminourea and phenylacetylene to yie
ld the corresponding products 2-morpholino-3-phenylquinoxaline (3) and 5-mo
rpholino-6-phenyl-1,2,4-triazine-3-one (4) and 2,4-diphenyl-3-morpholino th
iophene (6), respectively.