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Keywords:

  • 1-Benzoxepine;
  • Sharpless asymmetric dihydroxylation;
  • Cyclic sulfate

Abstract

A new asymmetric synthesis of 2,3-disubstituted 1-benzoxepines is described. Key steps include Sharpless asymmetricdihydroxylation of trans-α,β-unsaturated esters and phenoxide ion mediated intramolecular 7-endo-tet carbocyclization of syn-2,3-dihydroxy ester derived cyclic sulfates. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)