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Combined directed ortho-metalation, remote metalation, and Stille cross-coupling strategies. Concise stereoselective synthesis of polysubstituted 9H-fluoren-9-ones
Authors:Anne-Sophie Castanet,Jean-Baptiste Vé  ron,Asish De,Jacques Mortier
Affiliation:a Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
b Indian Association for the Cultivation of Science, 700 032 Jadavpur, Kolkata, India
Abstract:The new sequential stereoselective synthesis of diversely substituted 9H-fluoren-9-ones by ortho-lithiation/Bu3SnCl quench of unprotected benzoic acids followed by Stille cross-coupling reaction and remote metalation is reported.
Keywords:ortho and Remote metalations   Stille reaction   Benzoic acids
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