Regioselective synthesis and antimicrobial evaluation of new 1-aryloxyacetyl-, 1-thiophenoyacetyl- and 1-phenylaminoacetyl-substituted 3-alkyl(aryl/heteroaryl)-5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazoles
作者:Helio Gauze Bonacorso、Everton P. Pittaluga、Sydney H. Alves、Larissa F. Schaffer、Susiane Cavinatto、Liliane M. F. Porte、Gisele R. Paim、Marcos A. P. Martins、Nilo Zanatta
DOI:10.3998/ark.5550190.0013.806
日期:——
regioselective synthesis of new series of twenty 1-aryloxy(thio)acetyl and 1-(phenylamino)acetyl-substituted 5-trifluoromethyl-5hydroxy-4,5-dihydro-1H-pyrazoles (3) in 34–96% yields from the cyclocondensation reaction of 4-alkoxy-4-alkyl-(aryl/heteroaryl)-1,1,1-trifluoroalk-3-en-2-ones with different substituted acetohydrazides. Dehydration reactions of 3, carried out in the presence of thionyl chloride, furnished
本文描述了一种区域选择性合成新系列 20 个 1-芳氧基(硫代)乙酰基和 1-(苯氨基)乙酰基取代的 5-三氟甲基-5羟基-4,5-二氢-1H-吡唑 (3) 的有效方法4-烷氧基-4-烷基-(芳基/杂芳基)-1,1,1-三氟烷-3-en-2-酮与不同取代乙酰肼的环缩合反应产率为34-96%。在亚硫酰氯存在下进行的 3 的脱水反应提供了两个芳香族 5-三氟甲基-1H-吡唑衍生物的例子,产率为 78-82%。抗菌试验证明,白色念珠菌对 1-(苯基氨基)乙酰基取代的 3-烷基-2-吡唑啉衍生物的作用特别敏感;然而,与标准药物相比,最初的结果仍然很弱。