Chemical synthesis method for 2-formylcyanoacetylhydrazone-quinoxaline-1,4-dioxide

The invention discloses a synthesizing method of 2-formyl cyano aceto hydrazone-quinoxaline-1, 4-dioxide, which comprises the following steps: adding benzofuran and acetone into reacting bottle; dripping pyrrolidone, diethylamine or condensed ammonia as catalyst slowly; refluxing; obtaining N, N-1, 4-dioxy-2-methyl quinoxaline as intermediate; adding the intermediate and selenium dioxide, manganese dioxide or chromium trioxide into reacting bottle; adding dimethyl sulfoxide and anhydrous alcohol; heating to obtain N, N-dioxy quinoxaline-2-formaldehyde as intermediate; adding cyanacethydrazide into the mass; stirring; adjusting pH value of reacting liquid; evolving product; filtering; drying; obtaining the product.