Preparation method of trifluoromethyl olefin

The invention discloses a preparation method of trifluoromethyl olefin. The invention provides a preparation method of trifluoromethyl olefin, which comprises the following steps: (1) in a halogenated hydrocarbon solvent or an ether solvent, carrying out addition reaction as shown in the specification on a compound as shown in a formula I, CuX '2, CF3SO2Na and N (R2) 4X; and (2) carrying out elimination reaction as shown in the specification on the product of the addition reaction in the step (1) and alkali in an organic solvent. The preparation method of trifluoromethyl olefin provided by the invention has the advantages that the electron-rich styrene substrate is applicable, the dosage of the metal catalyst is small, high-pressure conditions are not needed, photocatalysis is not needed, reaction conditions are easy to control, post-treatment is relatively convenient, the yield is high and the like. # imgabs0 # 本发明公开了一种三氟甲基烯烃的制备方法。本发明提供了一种三氟甲基烯烃的制备方法，其包括如下步骤：(1)在卤代烃溶剂或醚类溶剂中，将如式Ⅰ所示化合物、CuX'2、CF3SO2Na、N(R2)4X进行