Aitken RA, Harper AD, Inwood RA, Slawin AMZ. Access to Diarylmethanols by Wittig Rearrangement of
ortho-,
meta-, and
para-Benzyloxy-
N-Butylbenzamides.
J Org Chem 2022;
87:4692-4701. [PMID:
35286089 PMCID:
PMC9007461 DOI:
10.1021/acs.joc.1c03160]
[Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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The N-butyl amide
group, CONHBu, has been found
to be an effective promoter of the [1,2]-Wittig rearrangement of aryl
benzyl ethers and thus allow the two-step synthesis of isomerically
pure substituted diarylmethanols starting from simple hydroxybenzoic
acid derivatives. The method is compatible with a wide range of functional
groups including methyl, methoxy, and fluoro, although not with nitro
and, unexpectedly, is applicable to meta as well
as ortho and para isomeric series.
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