Condensation of methyl 2-chloro-3-(3-nitrophenyl)-2,3-epoxypropionate with 1,2-phenylene diamine
It is established that the α-chloroepoxide methyl 2-chloro-3-(3-nitrophenyl)-2, 3-epoxypropionate, in contrast to its a-chloroketone isomer methyl 3-(3-nitrophenyl-3-chloro-2-oxopropionate, forms 2-(3-nitrophenyl-3methoxycarbonylquinoxaline in reaction with 1,2-phenylene diamine, whereas the condensation of the achloroketone with 1,2 phenylene diamine gives 3-(α-chloro-3-nitrophenyl)-2-oxo-1,2-dihydroquinoxaline.