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DOI: 10.1055/s-0031-1289520
Buchner and Beyond: Arene Cyclopropanation as Applied to Natural Product Total Synthesis
Publication History
Publication Date:
06 October 2011 (online)
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Abstract
Buchner and Curtius first reported the cyclopropanation of arenes in 1885. Since the initial discovery, the Buchner reaction has been the subject of significant research by both physical and synthetic organic chemists. Described herein is a brief overview of the Buchner reaction and related arene cyclopropanation processes, with an emphasis on their application to natural product total synthesis.
Key words
Buchner - cyclopropanation - diazo - norcaradiene - cycloheptatriene - total synthesis
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References and Notes
Cyclopentanones i and ii were determined to be the major byproducts (Figure [²] ).
28Substrates 35b and 35c were screened against an array of rhodium and copper catalysts; Table [¹] , entries 9 and 10 represent the best catalysts identified for the formation of 36b and 36c, respectively.
31Ketoaldehyde iii (Figure [³] ) is also formed in 36% yield; iii can be converted into 32 using catalytic Rh(cod)Cl2 and diphenylphosphinopropane. See: Phan D. H. T., Kim B., Dong V. M.; J. Am. Chem. Soc.; 2009, 131: 156