Synthesis of fluorenones based on a '[3+ 3] cyclization/Suzuki cross-coupling/Friedel–Crafts acylation'strategy

S Reim, M Lau, P Langer

Index: Reim, Stefanie; Lau, Matthias; Langer, Peter Tetrahedron Letters, 2006 , vol. 47, # 38 p. 6903 - 6905

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Citation Number: 34

Abstract

Fluorenones are of pharmacological relevance and occur in a number of natural products, such as dengibsin, dengibsinin, or dendroflorin. 1 Fluorenones have been prepared, for example, by intramolecular Friedel–Crafts acylations of biaryls. 2 Snieckus and co-workers reported the synthesis of fluorenones based on remote aromatic metalation. 3 Some years ago, Chan and co-workers reported 4 the synthesis of arenes by [3+3] cyclization of 1,3-bis-silyl enol ...