Studies in Thiazolo Quinoxalines. Part I

2-Arylimino-2 : 3-dihydro thiazolo(4,5-b)quinoxalines and 2-imino-3-aryl-2 : 3-dihydro thiazolo (4,5-b) quinoxalines have been obtained by the condensation of 2: 3-dichloro quinoxalines and N-aryl thioureas. N-phenyl-N'-methyl thiourea on interaction with the dichloro quinoxaline furnished 2-phenylimino- 3-methyl-2 : 3-dihydro thiazolo(4,5-b)quinoxaline and 2-methyl-imino-3-phenyl-2 : 3-dihydro thiazolo (4,5-b)quinoxaline