Shyroka T. Synthesis of 1,2-polymethylene-1,3-diazaheterocycles and polymethyne dyes on their base

The present work is devoted to the elaborate of convenient general method for synthesis of some 1,2-polymethylene-1,3-diazaheterocycles such as 1,2-polymethylene-4-quinazolones, 3,4-polymethylene-1,2,4-benzothiadiazinedioxides-1,1 and 1,2-polymethylenebenzimidazoles starting from lactim ethers. Based on N-phenacylium salts of 1,2-polymethylenebenzimidazole derivatives of new heterocyclic system - 3,4,5,6-tetrahydro-6a,10b-diazabenzo[a]cyclopenta[cd]azulene was obtained. Based on salts and formyl derivatives of obtained compounds a set of symmetric and unsymmetric dyes were prepared and their spectrum qualities were investigated.