Synthesis and Reactivity of (Z)-3-Benzoylamino-4-dimethylamino-2-oxo-3-butene. Preparation of 1-Aryl- and 1-Heteroaryl-substituted 4-Benzoyl-amino-5-methyl-1H-pyrazoles
作者:Branko Stanovnik、Urska Bratusek、Simon Recnik、Jurij Svete、Ljubo Golic
DOI:10.3987/com-02-9566
日期:——
(Z)-3-Benzoylamino-4-dimethylamino-2-oxo-3-butene (4), prepared from 1-benzoylamino-2-propanone (3) and N,N-dimethylformamide dimethyl acetal, was converted regioselectively by reaction with a series of hydrazines (5) into 1-substituted 4-benzoylamino-5-methyl-1H-pyrazoles (8). Reactions of 4 with primary amines (10) and with dimethylbarbituric acid (12) afforded the dimethylamine substitution products
(Z)-3-Benzoylamino-4-dimethylamino-2-oxo-3-butene (4) 由 1-benzoylamino-2-propanone (3) 和 N,N-dimethylformamide 二甲基缩醛制备,通过与一系列肼 (5) 转化为 1-取代的 4-苯甲酰氨基-5-甲基-1H-吡唑 (8)。4 与伯胺 (10) 和二甲基巴比妥酸 (12) 的反应分别得到二甲胺取代产物 (11) 和 (13)。用氨处理丁烯酮(13),得到四氢吡啶并[2,3-d]嘧啶衍生物(14)。