Abstract 5-Chloro-6-nitroquinoxaline 2, made in six steps from 2, 3-dichloronitro-benzene, reacts 1) with piperidine to give 6-nitro-5-piperidinoquinoxaline as the only product; 2) with methoxide to give a 95: 5 ratio of 5-methoxy-6-nitro-and 5-chloro-6-methoxy-quinoxaline; 3) with p-thiocresolate to give the disubstitution product without showing any monosubstitution product.
