FIELD: organic chemistry. SUBSTANCE: product: 6,7-dichloro-1,5-dihydroimidazo-[2,1-b] -quinazoline-2-(3H)-one, empirical formula is C10H7C12N3O, m. p. is above 300 C. Reagent: ethyl-(2-cyanoimino-5,6-dichloro-1,2,3,4-tetrahydroquinazoline-3-yl)-acetate. Reaction conditions: reagent cyclization at temperature above 80 C in the medium of solvent. EFFECT: improved method of synthesis. 12 cl
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