National Basic Research Program of China (No. 2012CB821600), National Natural Science Foundation of China (Nos. 21372247, 21572258, 21421002) and SIOC.
An improved method for the preparation of pentafluoroethylating reagent pentafluoroethyl-substituted benzio- doxole (BIX-C2Fs) was described. Under mild conditions, BIX-C2F5 was able to react with β-ketoesters or a...