Preparation of α-Haloacrylate Derivatives via Dimethyl Sulfoxide-Mediated Selective Dehydrohalogenation

Wei Li,* Jianchang Li, Zhao-Kui Wan, Junjun Wu, and Walter Massefski
Chemical and Screening Sciences, Wyeth Research, 200 Cambridge Park Drive, Cambridge, Massachusetts 02140
Org. Lett., 2007, 9 (22), pp 4607–4610
DOI: 10.1021/ol7021142
Publication Date (Web): October 2, 2007
Copyright © 2007 American Chemical Society

Abstract

Abstract Image

Dimethyl sulfoxide causes α,β-dihalopropanoate derivatives to undergo efficient, selective dehydrohalogenation to form α-haloacrylate analogues. A variety of α-halo Michael acceptors were prepared in dimethyl sulfoxide under mild, base-free conditions, including the preparation of α-bromoacrolein and α-chloro- and bromoacrylonitriles. Synthesis of these molecules has been reported in the literature to be difficult. Among all the existing dehydrohalogenation procedures, this protocol is the most facile, practical, and environmentally benign process.

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

  • Cover Image

    Mechanistic Pathways in CF3COOH-Mediated Deacetalization Reactions

    Wei Li, Jianchang Li, Yuchuan Wu, Nathan Fuller and Michelle A. Markus
    The Journal of Organic Chemistry2010 75 (4), 1077-1086
    • Mechanistic Pathways in CF3COOH-Mediated Deacetalization Reactions

      Wei Li, Jianchang Li, Yuchuan Wu, Nathan Fuller and Michelle A. Markus
      The Journal of Organic Chemistry2010 75 (4), 1077-1086

      It has been widely accepted that both the protection of carbonyls and the deprotection of acetals and ketals involve the participation of a water molecule: formation of acetals and ketals is a dehydration process, whereas the deprotection is often ...

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History

  • Published In Issue October 25, 2007
  • Received August 28, 2007

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