Dimethylformamide Catalyzed Synthesis of Novel Heterocycles—Their Characterization and Antimicrobial Evaluation

Indandione 1 was brominated to yield 2-bromoIndandione 2, which further reacted with substituted thiocarbamides, carbamides, 2-aminothiophenols, 2-aminophenol, and triazole to furnished 3-substituted aniline-2-thia-4-aza-6,7-benzo-8-oxo-bicyclo[3.3.0]-1(5),3-octadiene 3, 3-substituted aniline-2-oxa-4-aza-6,7-benzo-8-oxo-bicyclo[3.3.0]-1(5),3-octadiene 4, 2-Thia-5-aza-9-oxo-3,4-(3′-substituted) benzo-7,8-benzo-bicyclo[4.3.0]-1(6) nonene 5, 2-oxa-5-aza-9-oxo-(3, 4)-(7,8)-dibenzo-bicyclo[4.3.0]-1(6) nonene 6, 3′-substituted-(1′,2′,4′)triazolo[5,6-b][indeno(2,3-e)]-1,3,4-thiadiazine 7, respectively. The structures of compounds were elucidated on the basis of spectral techniques, further the representative compounds were screened for their antimicrobial activity.