摘要:
4-Anisy1-5,6-polymethylene-3-cyanopyridine-2(1H)-thiones 1 were reacted with chloroacetonitrile in alcoholic KOH to give theino[2,3b]pyridine derivatives 2. Enaminonitriles 2 were reacted with each of HCOOH, formamide/HCOOH/DMF mixture and cyanamide/HCl to give 3, 4, and 5, respectively, whereas boiling 2 in a proper solvent and basic catalyst with each of CS2 and thiourea yielded 6 and 7 respectively, On the other hand, fused pyridine derivatives 8, 9, and 10 were obtained by refluxing 2 with each of malononitrile, ethyl cyanoacetate, and benzalmalononitrile in alcoholic triethylamine mixture. Also, fused pyrazoles and benzo-1,4-diazepines 12 and 14 were synthesized.