Synthesis and Characterization of Novel 2-(1,2,3-Triazol-4-yl)-4,5-dihydro-1H-pyrazol-1-yl)thiazoles and 2-(4,5-Dihydro-1H-pyrazol-1-yl)-4-(1H-1,2,3-triazol-4-yl)thiazoles
作者:Benson M. Kariuki、Bakr F. Abdel-Wahab、Hanan A. Mohamed、Mohamed S. Bekheit、Gamal A. El-Hiti
DOI:10.3390/molecules27248904
日期:——
Reactions of 1-(5-methyl)-1H-1,2,3-triazol-4-yl)ethan-1-ones and benzaldehydes in ethanol under basic conditions gave the corresponding chalcones. Reactions of the chalcones combined with thiosemicarbazide in dry ethanol containing sodium hydroxide afforded the corresponding pyrazolin-N-thioamides. Reactions of the synthesized pyrazolin-N-thioamides and several ketones (namely, ethyl 2-chloro-3-oxobutanoate
在碱性条件下,1-(5-甲基)-1H-1,2,3-三唑-4-基)乙-1-酮和苯甲醛在乙醇中发生反应,得到相应的查耳酮。在含有氢氧化钠的干燥乙醇中,查耳酮与硫代氨基甲酰肼反应生成相应的吡唑啉-N-硫代酰胺。将合成的吡唑啉-N-硫酰胺与几种酮(即 2-氯-3-氧代丁酸乙酯、2-溴乙酰基苯并呋喃和肼酰氯)反应,可得到相应的新型 2-(1,2,3-三唑-4-基)-4,5-二氢-1H-吡唑-1-基)噻唑,产率高(77-90%)。此外,在碱性条件下,通过与 N-吡唑啉硫酰胺和 4-溴乙酰基-1,2,3-三唑反应,高产率(84-87%)地获得了 2-(4,5-二氢-1H-吡唑-1-基)-4-(1H-1,2,3-三唑-4-基)噻唑。六种新合成杂环的结构通过 X 射线晶体学得到了证实。