Preparation of 1,1-difluoroalkanes from aldehydes via 1,1-bistriflates: Advantageous use of HF–Lewis base reagents
摘要:
Alkane-1,1-bistriflates, prepared in excellent yields by reaction of aldehydes with triflic anhydride, are converted to their respective 1,1-difluoroalkanes in good to excellent yield through reaction with fluorinating agent, triethylaminetrishydrofluoride. Straight chain 1,1-bistriflates are more reactive than those substituted at the 2-position, but the latter are also converted successfully, without evidence of any rearrangement products. (C) 2014 Elsevier B.V. All rights reserved.
Arylsulfur trifluorides: Improved method of synthesis and use as in situ deoxofluorination reagents
作者:Wei Xu、Henry Martinez、William R. Dolbier
DOI:10.1016/j.jfluchem.2011.05.001
日期:2011.7
improved method of synthesis of arylsulfurtrifluorides, including the excellent, new deoxofluorination reagent Fluolead, is hereby reported. The method utilizes Br2 and KF as oxidizing and fluorinating reagents for efficient, high yield conversion of aryl disulfides and mercaptans to arylsulfurtrifluorides. It has also been shown that both Fluolead and mesitylsulfur trifluoride may be generated in acetonitrile