作者:Ning Zhu、Min Zhang、Qianqian Li、Zhongwei Wu、Hongmei Deng、Liping Song
DOI:10.1016/j.jfluchem.2019.04.007
日期:2019.5
A series of 4-substituted 3-aryl-5-trifluoromethyl-4,5-dihydroisoxazole derivatives was synthesized by selective reduction of the corresponding 3-aryl-5-trifluoromethyl-4-isoxazole with NaBH4 under various reaction conditions. It was found that the reduction selectivity of endocyclic carbon-carbon double bond of the isoxazole ring was strongly dependent on the electronic effects of substituents at
通过在各种反应条件下用NaBH 4选择性还原相应的3-芳基-5-三氟甲基-4-异恶唑,合成了一系列4-取代的3-芳基-5-三氟甲基-4,5-二氢异恶唑衍生物。发现异恶唑环的环内碳-碳双键的还原选择性强烈取决于三氟甲基化异恶唑的C-4处的取代基的电子效应。同时,溶剂效应也对4-亚氨基酰基取代的异恶唑环的内环碳-碳双键的还原选择性具有很大的影响。