BENZOPYRANS FROM 2-BROMO-4,6-DIACETYL RESORCINOL

yl-8-bromo-2-methyl-7-hydroxy-4-oxo-4H-1benzopyran Vb; romo-7-hydroxy- 4-oxo-4H-1-benzopyran-2-carboxylate VIIb, and 10-bromo-2,8-diphenyl-4, 6-dioxo-4H, 6H-benzo[1,2-b:5,6-b')-dipyran XV were prepared, from 2-br omo-4,6-diacetylresorcinol Ib. The behaviour of the Vb towards benzald ehyde, hydroxylamine, hydrazine, and amines was investigated. Also the action of thiourea on the benzodipyran XV was investigated, where the dithiopyrimidine derivative XVI was obtained.