Cu-Promoted difluorocarbene-derived trifluoromethylselenolation of benzylhalides with the Ph3P+CF2CO2−/Se/F− system is described. Three new carbon–heteroatom bonds, a Se–CF2 bond, SeCF2–F bond, and C–SeCF3 bond, were sequentially formed in the reaction. This work represents the first trifluoromethylselenolation protocol involving an external fluoride for the generation of the key intermediate, CF3Se−
铜促进的苄基卤的二氟卡宾衍生trifluoromethylselenolation随pH 3 P + CF 2 CO 2 - / S ë / F -系统进行说明。在反应中依次形成了三个新的碳-杂原子键:Se-CF 2键,SeCF 2 -F键和C-SeCF 3键。这项工作是涉及为关键中间体,CF的产生的外部氟化物第一trifluoromethylselenolation协议3硒-阴离子。
Copper-Catalyzed Trifluoromethylselenolation of Aryl and Alkyl Halides: The Silver Effect in Transmetalation
作者:Chaohuang Chen、Chuanqi Hou、Yuguang Wang、T. S. Andy Hor、Zhiqiang Weng
DOI:10.1021/ol403406y
日期:2014.1.17
A catalytic trifluoromethylselenolation of aryl and alkylhalides by a Cu(I) catalyst has been developed. A key intermediate, [(phen)Cu(SeCF3)]2 (5) was successfully isolated and characterized by X-ray diffraction. The important role of silver in the transmetalation process during the catalytic cycle was elucidated. A wide range of trifluoromethylselanes have been prepared from readily available starting
Dehydroxytrifluoromethylthiolation(selenolation) of alcohols with C S(Se)CF3 reagent based on imidazole skeleton
作者:Zhenyu Wang、Jiaxin Hu、Wei Liu、Chao Chen
DOI:10.1016/j.tetlet.2023.154670
日期:2023.9
Directtrifluoromethylthiolation and trifluoromethylselenolation of alcohols with the new CS(Se)CF3 reagent based on imidazole skeleton has been realized. The reaction proceeds smoothly at room temperature under transition-metal-free conditions and affords the corresponding trifluoromethylthiolated and trifluoromethylselenolated products in good yields. Advantages of the method include mildness, good