Perfluoroalkylation of 2-mercaptobenzothiazole and its analogues with perfluoroalkyl iodides by an SRN1 reaction
摘要:
The thiolates, generated in situ by the reaction of 2-mercaptobenzothiazole (1) and its analogues (2) and (3) with sodium hydride, react under UV irradiation with perfluoroalkyl iodides (4)-(8) to give the corresponding heteroaromatic perfluoroalkyl sulfides (9)-(18) in 50-98% yields. The fact that the UV irradiation increases the conversion of perfluoroalkyl iodides and that the radical scavenger di-tert-butylnitroxide suppresses the reaction demonstrates that the reaction proceeds via an S(RN)1 mechanism.