Synthesis of 2-Thioxohydropyridine-3-Carbonitrile, 2-Alkylthiopyridine, Thienopyridine, Pyrazolopyridine Derivatives and Their Theoretical Calculations
作者:Fawzy A. Attaby、Ahmed H. H. Elghandour、Hussein M. Mustafa、Yasser M. Ibrahem
DOI:10.1002/jccs.200200087
日期:2002.8
starting material for the synthesis of 1-(3-amino-4-methylthieno[2,3-b]pyridin-2-yl)ethan-1-one (10), 3-amino-4-methylthieno[2,3-b]pyridine-2-carboxamide (15), 3-amino-4-methylthieno[2,3-b]pyridine-2-carboxylate (18) and 3-amino-4-methylthieno[2,3-b]pyridin-2-ylarylketone 25a-c through its reactions with each of (1-chloroacetone (8), 3-chloropentane-2,4-dione (11) or ethyl 2-chloro-3-oxo-butanoate (19))
氰基硫代乙酰胺 (1) 与丁-2-烯醛 (2) 反应得到相应的 4-甲基-2-硫烷基吡啶-3-甲腈 (7),它可用作合成 1-(3-氨基) 的良好原料-4-methylthieno[2,3-b]pyridin-2-yl)ethan-1-one (10), 3-amino-4-methylthieno[2,3-b]pyridine-2-carboxamide (15), 3 -氨基-4-甲基噻吩并[2,3-b]吡啶-2-羧酸盐 (18) 和 3-氨基-4-甲基噻吩并[2,3-b]吡啶-2-基芳基酮 25a-c (1-氯丙酮 (8)、3-氯戊烷-2,4-二酮 (11) 或 2-氯-3-氧代丁酸乙酯 (19))、2-氯乙酰胺 (13)、2-氯乙酸乙酯 (16)和 2-bromo-1-arylethan-1-one 23a-c,分别。结合元素分析、IR、1HNMR、质谱和理论计算数据,阐明了新合成的杂环化合物的结构。