Abstract: A series of some new bisadducts possessing five, six membered and coumarin subunits were synthesized by the condensation of heterocyclic aldehydes with active methylene compounds and characterized by IR, NMR and X-ray crystallographic studies and were assayed as antitubercular agents. Among the bisadducts, 4-hydroxy-3-[(4-hydroxy- 2-oxo-2H-3-chromenyl)(3-thienyl) methyl]-2H-2-chromenone 3a was found to be the most ...
