Abstract: o-Phenylendiamine 1 is condensed with oxalic acid using Phillip's procedure to obtain quinoxaline-2, 3-doine 2, which on treatment with POCI 3 gives the known 2, 3- dichloroquinoxaline 3. 2-Chloro-3-hydrazinoquinoxaline 4 is prepared in a facile and simple way by treatment of 3 with hydrazine hydrate in methanol or in dioxane containing triethylamine. Condensation of 4 with a variety of aldehydes in DMF at room temperature ...
