Stereospecific introduction of a C-17 side chain in a 14β-hydroxy-steroid was carried out using acetylenic lithium or Grignard reagents; unequivocal proof of the structures of the two products was derived from single-crystal X-ray analyses.
J. Beloeil, M. Bertranne, M. Fétizon and T. Prangé, J. Chem. Soc., Chem. Commun., 1981, 363 DOI: 10.1039/C39810000363
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