Efficient synthesis and dehydration reaction of trichloromethylated 2-(3-phenyl-5-hydroxy-4,5-dihydro-1H-pyrazol-1-yl)-4-aryl-5-alkylthiazoles
作者:Helio G. Bonacorso、Mauro N. Muniz、Arci D. Wastowski、Nilo Zanatta、Marcos A. P. Martins
DOI:10.1002/hc.10113
日期:——
A convenient method for the synthesis of a novel series of 11, specifically substituted, noncondensed 5,5-bicycles 2-[3-phenyl-5-hydroxy-5-trichloromethyl-4,5-dihydro-1H-pyrazol-1-yl]-4-aryl-5-alkylthiazoles (3a–k; 65–94% yield) from the reactions of 3-phenyl-5-hydroxy-5-trichloromethyl-4,5-dihydro-1H-1-pyrazolethiocarboxyamide (1) with substituted 2-bromo-4′-acetophenones (2a–f) and 2-bromo-4′-propiophenones
一种合成 11 个新系列的便捷方法,特别是取代的非缩合 5,5-双环 2-[3-苯基-5-羟基-5-三氯甲基-4,5-二氢-1H-吡唑-1-基]-4-芳基-5-烷基噻唑(3a-k;产率65-94%)来自3-苯基-5-羟基-5-三氯甲基-4,5-二氢-1H-1-吡唑硫代羧酰胺(1)的反应据报道,具有取代的 2-bromo-4'-苯乙酮 (2a-f) 和 2-bromo-4'-propiophenones (2g-k)。化合物 3a-k 用浓硫酸/氯仿混合物脱水得到相应的 2-[3-苯基-5-三氯甲基-1H-吡唑-1-基]-4-芳基-5-烷基噻唑 (4a-k)收率良好 (61–93%)。© 2003 Wiley Periodicals, Inc. 杂原子化学 14:132–137, 2003; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI