Reactions of Sulfur- and Phosphorus-Substituted Fluoroalkylating Silicon Reagents with Imines and Enamines under Acidic Conditions
摘要:
Nucleophilic fluoroalkylation reactions of imines and enamines with alpha-phenylthio, alpha-phenylsulfonyl, and alpha-diethylphosphoryl substituted fluorinated silanes have been investigated. The reactions are promoted by hydrofluoric acid generated in situ from potassium hydrodifluoride and trifluoroacetic acid. Sulfur reagents worked well with both imines and enamines, whereas phosphorus reagent efficiently coupled only with enamines.
Reactions of Sulfur- and Phosphorus-Substituted Fluoroalkylating Silicon Reagents with Imines and Enamines under Acidic Conditions
作者:Mikhail D. Kosobokov、Alexander D. Dilman、Marina I. Struchkova、Pavel A. Belyakov、Jinbo Hu
DOI:10.1021/jo202669w
日期:2012.2.17
Nucleophilic fluoroalkylation reactions of imines and enamines with alpha-phenylthio, alpha-phenylsulfonyl, and alpha-diethylphosphoryl substituted fluorinated silanes have been investigated. The reactions are promoted by hydrofluoric acid generated in situ from potassium hydrodifluoride and trifluoroacetic acid. Sulfur reagents worked well with both imines and enamines, whereas phosphorus reagent efficiently coupled only with enamines.
Nucleophilic Trifluoromethylation of Imines under Acidic Conditions
作者:Vitalij V. Levin、Alexander D. Dilman、Pavel A. Belyakov、Marina I. Struchkova、Vladimir A. Tartakovsky
DOI:10.1002/ejoc.200800820
日期:2008.11
A general method for the trifluoromethylation of imines by using Me3SiCF3 under acidic conditions is described. The reaction is promoted by hydrofluoric acid generated in situ from KHF2 and either TFA or TfOH. A new chemoselectivity pattern was achieved, as the C=N bond was found to be more reactivate than the carbonyl group. The trifluoromethylation reaction is believed to proceed by concerted transfer