A number of improved laboratory procedures for the synthesis of imidazol [1,2-a]pyridine derivatives are reported. The resulting compounds, which are structurally related to indole derivatives, have been screened for analgetic, antipyretic, anticonvulsant, and antiinflammatory activity. Phytopharmacological tests have also been performed on the derivatives structurally related to indoleacetic acid. © 1969, American Chemical Society. All rights reserved.