Synthesis, antitumor and antimicrobial activities of 4-(4-chlorophenyl)-3-cyano-2-( β- O-glycosyloxy)-6-(thien-2-yl)-nicotinonitrile

Abstract

4-(4-Chlorophenyl)-3-cyano-6-(thien-2-yl)-1 H-pyridin-2-one ( 2) was obtained by reaction of 2-acetyl thiophene with 4-chlorobenzaldehyde and ethyl cyanoacetate in presence of ammonium acetate or by the reaction of α, β-unsaturated compound 1 with ethyl cyanoacetate in the presence of ammonium acetate. 4-(4-Chlorophenyl)-2-(2′,3′,4′,6′-tetra- O-acetyl- β- d-gluco/galactopyranosyloxy)-6-(thien-2-yl)nicotinonitrile ( 5a and 5b), riboside 11, xyloside 12 and lactoside 16 were prepared by the reaction of 2 with glycosyl/galactosyl/xylosyl/lactosyl bromide and peracetylated xylose/ribose under the conventional and microwave irradiation methods. The reaction has regioselectively gave the O-glycosides and not the N-glycosides. The glycosides 5a, b, riboside 11, xyloside 12 and lactoside 16 were deacetylated in the presence of Et 3N/MeOH and few drops of water to give 7a, b, 13, 14 and 17. The structure of the new synthesized compounds was confirmed by using IR, 1H, 13C NMR spectra and microanalysis. Selected members of these compounds were screened for antitumor and antibacterial activity.