Phosphorus, Sulfur and Silicon and the Related Elements p. 293 - 303 (2004)
Update date:2022-08-02
Topics:
Sharaf, Mohie A. F.
Sherif, Sherif M.
Ibraheim, Nasser A. A.
4-Anisy1-5,6-polymethylene-3-cyanopyridine-2(1H)-thiones 1 were reacted with chloroacetonitrile in alcoholic KOH to give theino[2,3- b]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 CS 2 and thiourea yielded 6 and 7 respcetively. On the other hand, fused pyridine derivatives 8, 9, and 10 were obtained by re fluxing 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.
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