Copper-Catalyzed Asymmetric Propargylic Substitution of 2,2,2-Trifluoroethyl-isoxazoles with Propargylic Alcohol Derivatives
作者:Guangzheng Tian、Mingtong Ji、Fan Wu、Guan Wang、Changwu Zheng、Xiaoyu Wu
DOI:10.1021/acs.orglett.3c01521
日期:2023.6.30
methodologies have been reported for the asymmetric introduction of the trifluoromethyl group into organic molecules. In this study, a diastereo- and enantioselective propargylic substitution reaction was performed between propargylic carbonates and 2,2,2-trifluoroethyl-substituted nitroisoxazoles catalyzed by a Cu-pybox complex. This method enables the preparation of a series of propargylation products
三氟甲基是药物化学和药物发现中功能最丰富、应用最广泛的氟烷基之一。然而,将三氟甲基不对称引入有机分子的方法学报道很少。在本研究中,在 Cu-pybox 络合物的催化下,在炔丙基碳酸酯和 2,2,2-三氟乙基取代的硝基异恶唑之间进行了非对映和对映选择性炔丙基取代反应。该方法能够制备一系列具有两个连续立体中心的炔丙基化产物,其中一个是手性三氟甲基碳。在大多数情况下,所需产物的产率很高,并且具有良好至优异的非对映选择性和对映选择性。