Abstract A series of benzfused heterocyclic derivatives such as amide conjugates of 2- (benzo [d] thiazol-2-ylthio) acetic acid with aromatic/aliphatic/cyclic secondary amines (5a– 5o & 8a–8m); 1, 2, 3-triazole conjugates of 2-mercaptobenzothiazoles and amide conjugates of indole-3-glyoxalic acid with cyclic secondary amines (14a–14g) have been synthesized and were screened for their antitubercular activity against Mycobacterium ...