New succinyl-spaced pyrazoles: Regioselective synthesis of 1,4-bis[5-(trichloromethyl)-1H-pyrazol-1-yl]butane-1,4-diones
作者:Helio G. Bonacorso、Cleber A. Cechinel、Gisele R. Paim、Marcos A. P. Martins、Nilo Zanatta、Alex F. C. Flores
DOI:10.1002/jhet.523
日期:2011.1
The facile and convenient access by a conventional procedure in ethanol as solvent to a new series of succinyl‐spaced pyrazoles including 1,4‐bis[5‐(trichloromethyl)‐5‐hydroxy‐4,5‐dihydro‐1H‐pyrazol‐1‐yl]butane‐1,4‐diones (64–82%) and the respective dehydrated derivatives as 1,4‐bis[5‐(trichloromethyl)‐1H‐pyrazol‐1‐yl]butane‐1,4‐diones in 57–82% yields, from the regioselective cyclocondensation reactions
在乙醇中以常规方法通过常规方法可轻松便捷地获得一系列新的琥珀酰间隔的吡唑,其中包括1,4-双[5-(三氯甲基)-5-羟基-4,5-二氢-1H-吡唑- 1-基]丁烷-1,4-二酮(64-82%)和相应的脱水衍生物为1,4-双[5-(三氯甲基)-1 H-吡唑-1-基]丁烷-1,4-由4-取代的4-甲氧基-1,1,1-三氯烷基-3-烯-2-酮与琥珀酸二酰肼的区域选择性环缩合反应制得的二酮,产率为57-82%,其中4个取代基为Me,Ph ,4-FC 6 H ^ 4,4-CLC 6 ħ 4,4-NO 2 C ^ 6 ħ 4报道了2-呋喃基和2-噻吩基。J.杂环化学.2011。