Microwave induced synthesis of 2-substituted phenyl-3-(3-alkyl/aryl-5,6-dihydro-S-triazolo)[2,4-B][1,3,4]thiadiazo 6-yl indoles and 2-phenyl-3 [2,substituted benzothiazole] derivatives and their fungicidal activity

The title compounds were synthesised by condensation of 3-alykl/aryl-4-amino-5-mercaptotriazole (II) and 5-substituted 2-aminothiophenols (IV) with appropriate 2-phenyl-1H-indole-3-carboxaldehyde (I) under microwave irradiation in the presence of piperidine/p-toluenesulphonic acid using ethanol/DMF as energy transfer media. The considerable increase in reaction rare with improved yield has been observed, using microwave as compared to classical method.