Stereospecific benzylic dehydroxyfluorination reactions using Bio's TMS-amine additive approach with challenging substrates

Stefano Bresciani, David O'Hagan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Reactions involving the conversion of a benzylic alcohol into a benzylic fluoride using RSF3 reagents are notoriously difficult to achieve with high stereochemical inversion (S(N)2 reaction) due 70 competing dissociative S(N)1 reaction processes. This Letter develops the methodology of Bio et al., and reports that the addition of a preformed 1:TMS-amine 1:RSF(3) (fluorination reagent) complex as the reagent in these reactions significantly suppresses the S(N)1 process and promotes a highly stereospecific reaction generating benzylic fluorination products of high %ee. (C) 2010 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)5795-5797
Number of pages3
JournalTetrahedron Letters
Volume51
Issue number44
DOIs
Publication statusPublished - 3 Nov 2010

Keywords

  • DESIGN
  • ALPHA-FLUORINATION
  • REAGENTS
  • CHEMISTRY
  • ENANTIOSELECTIVE FLUORINATION
  • ASYMMETRIC FLUORINATION
  • ALDEHYDES

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