MICROWAVE ASSISTED SYNTHESIS AND SPECTRAL STUDIES OF 2-THIOPHEN-2-YLMETHYLENE-2,3,4,9-TETRAHYDRO-CARBAZOL-1-ONE,3-THIOPHEN-2-YL-4,5-DIHYDRO-10H-2-OXA-1,10-DIAZA-CYCLOPENTA[a]CARBAZOLE AND 3-THIOPHEN-2-YL-2,4,5,10-TETRAHYDRO-1,2,10-TRIAZA-CYCLOPENTA[a]CARBAZOLE DERIVATIVES

摘要

Microwave assisted new aldol condensation reaction of 1-oxo-1,2,3,4-tetrahydrocarbazoles 1 with thiophene-2-carbaldehyde 2 in the presence of alcoholic KOH affords asingle product 2-Thiophen-2-ylmethylene-2,3,4,9-tetrahydro-carbazol-1-one3. 3on irradiation withhydroxylamine hydrochloride yielded 3-Thiophen-2-yl-4,5-dihydro-10H-2-oxa-1,10-diaza-cyclopenta[a]carbazole 4 and3 on irradiation with hydrazine hydrate in ethanol medium to yielded3-Thiophen-2-yl-2,4,5,10-tetrahydro-1,2,10-triaza-cyclopenta[a]carbazole5. The structures of thesynthesized compounds were confirmed on the basis of physical and spectral analysis (FT-IR, 1H,13C-NMR) and Mass spectral data