Palladium Pincer Complex Catalyzed Substitution of Vinyl Cyclopropanes, Vinyl Aziridines, and Allyl Acetates with Tetrahydroxydiboron. An Efficient Route to Functionalized Allylboronic Acids and Potassium Trifluoro(allyl)borates

Sara Sebelius, Vilhelm J. Olsson, and Kálmán J. Szabó*
Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
J. Am. Chem. Soc., 2005, 127 (30), pp 10478–10479
DOI: 10.1021/ja052885q
Publication Date (Web): July 7, 2005
Copyright © 2005 American Chemical Society
*

In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.

, kalman@organ.su.se

Abstract

Abstract Image

Palladium-catalyzed boronation of vinyl cyclopropane, vinyl aziridine, and allyl acetate substrates could be accomplished using tetrahydroxydiboron reagent in the presence of SeCSe pincer complex catalyst 1a. These reactions result in allyl boronic acids, which were converted to synthetically useful trifluoro(allyl)borates or allyl boronates. The catalytic transformations proceed under mild and neutral conditions, and therefore many functionalities Br, COOEt, ArSO2(NH), OAc, and SiRMe2 are tolerated. The selectivity of the presented processes is very high, affording the linear products incorporating a trans double bond.

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History

  • Published In Issue August 03, 2005
  • Received May 3, 2005

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