SYNTHESIS AND SPECTRAL STUDIES OF NOVEL BIS-CHROMENE BY THE CYCLIZATION OF N, N'-METHYLENEBIS(2-CHLOROACETAMIDE) WITH SALICYLDEHYDE Synthese und spektrale STUDIUM DER NEUE BIS-chromen durch die Cyclisierung von N, N'-Methylen-bis (2-CHLOROACETAMIDE) MIT SALICYLDEHYDE

1, 2-diaminoethane react with chloroacetyl chloride to form N, N'-methylenebis(2- chloroacetamide), which exist in tautomeric equilibrium in DMSO-d6 solution. N, N'-bis(3- chloro-chromen)methanediamine was obtained by cyclocondensation of N, N'-methylenebis(2- chloroacetamide) with salicyldehyde in the presence of KOH. The synthesis of novel heterocyclic azo disperse dye bis[3-chloro-4(substituted)phenylazo-2H-chromene-2- iminyl]ethane derived from N, N'-bis(3-chloro-chromen)methanediamine and by using various diazonium salt. The structures of the newly synthesized compounds were confirmed by spectral data such as IR and NMR.