4.8 Article

Strategic Trimethylsilyldiazomethane Insertion into pinB-SR Followed by Selective Alkylations

Journal

ORGANIC LETTERS
Volume 18, Issue 15, Pages 3830-3833

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b01840

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Funding

  1. Spanish Ministerio de Economia y Competitividad (MINECO) [CTQ2013-43395P]
  2. NSERC

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The insertion of the diazo derivative Me3SiCHN2 into pinB-SR sigma bonds (R = Ph, Tol, Bn) allows a direct synthesis of multisubstituted H-C(SR)(Bpin)(SiMe3) compounds. Consecutive base-assisted transformations of HC(S)(B) (Si) systems lead to deborylative alkylations, Sommelet-Hauser rearrangements, and deprotoalkylations. Intramolecular cyclizations can be selectively performed either via desilylative or deborylative manifolds by fine-tuning the base employed.

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