Studies on the Synthesis of Some New Cyanopyridine-Thione and Thieno[2,3-<i>b</i>]pyridine Derivatives
作者:Omima S. Mohamed、Elham A. Al-Taifi、Talaat I. El-Emary、Etify Abdel-Ghafar Bakhite
DOI:10.1080/10426500601096369
日期:2007.3.15
reaction of 1a,b with ethyl acetoacetate produced 4-aryl-3-cyano-5-ethoxycarbonyl-6-methylpyridine-2(1H)-thiones ( 12a,b ). The reaction of compound 4a with methyl iodide gave 2-methylthio derivative 6 , which upon treatment with hydrazine hydrate furnished pyrazolopyridine 7 . Treatment of 4a–c with chloroacetaimde, in the presence of sodium ethoxide, led to the formation of 3-amino-4-aryl-6-(2-thienyl)thieno[2
本文中包括的工作涉及合成新的氰基吡啶硫酮作为具有预期生物活性的新噻吩并 [2,3-b] 吡啶的良好合成子。因此,β-芳基-α-硫代氨基甲酰基丙烯腈 (1a-c) 与 (2-thenoyl)-ω,ω,ω-三氟丙酮的反应导致了 4-芳基-3-氰基-6-(2- thienyl)pyridine-2(1H)-thiones (4a–c)。相反,1a,b 与乙酰乙酸乙酯的反应产生 4-aryl-3-cyano-5-ethoxycarbonyl-6-methylpyridine-2(1H)-thiones (12a,b)。化合物 4a 与甲基碘反应得到 2-甲硫基衍生物 6 ,其在用水合肼处理后得到吡唑并吡啶 7 。在乙醇钠存在下用氯乙酰胺处理 4a–c 导致形成 3-amino-4-aryl-6-(2-thienyl)thieno[2,3-b]pyridine-2-carboxamides (8a -C