Copper and Zinc Copromoted Bromo(chloro)trifluoromethylation of Alkenes and Alkynes with Trifluoromethanesulfonic Anhydride
作者:Yao Ouyang、Chao-Lai Tong、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.orglett.0c03855
日期:2021.1.15
The first copper and zinc copromoted trifluoromethylation using trifluoromethanesulfonic anhydride (Tf2O) as a trifluoromethylating reagent has been developed. The reaction of alkenes or alkynes with Tf2O in the presence of CuX2 (X = Br, Cl), Zn powder, and 2,2′-bipyridine affords bromo(chloro)trifluoromethylated products in good yields. CuX2 plays a dual role as the catalyst and halide source, whereas
已经开发出使用三氟甲磺酸酐(Tf 2 O)作为三氟甲基化试剂的铜和锌共促进的三氟甲基化。在CuX 2(X = Br,Cl),Zn粉和2,2'-联吡啶的存在下,烯烃或炔烃与Tf 2 O的反应可得到高产率的溴(氯)三氟甲基化产物。CuX 2担当催化剂和卤化物源的双重角色,而2,2'-联吡啶既充当活化剂又充当配体。