White synthesis

Graybill J. Org. Chem. 1967,32, 2931 Sipe Clary White Synthesis 1984, 283, See also Ueda Uchiyama Kano Synthesis 1984, 323. 

Effcnbcrger Huthmacher Chem. Ber. 1976, 109, 2315. For similar methods, sec Hancock Tyobeka Weigel J. Chem. Res.. (S) 1980, 270 Ono Nakamura Sato Itoh Chem. Lett. 1988, 395. l7,Hyatt White Synthesis 1984, 214. 

The second White synthesis of 154 (depicted in Scheme 4.29) began with the treatment of dibromoketone 181 with zinc-copper couple to give a 2-oxo-l,3-dipole, which upon condensation with furan gave the oxabicyclo[3.2.1] system 182. Hydrogenation of the double bond followed by Baeyer-Villiger reaction afforded lactone 183 in 92% yield. The prior three steps have created the stereochemistry (albeit undesired but manipulable) not only at the C-3 and C-6... 

L. Zhang, M. Brookhart, P. White, Synthesis, characterization, and ethylene polymerization activities of neutral nickel(II) complexes derived from anilino-substituted enone ligands bearing trifluoromethyl and trifluoroacetyl substituents. Organometallics 25(8), 1868-1974 (2006)... 

Banderanayake, M., M.J. Begeley, B.O. Brown, D.G. Clarke, L. Crombie, and D.A. Whiting Synthesis of Acridone and Carbazole Alkaloids Involving Pyridine Catalysed Chromene Formation Crystal and Molecular Structure of Dibromocanna-bicyclol and Its Bearing on the Structures of Cyclol Alkaloids. J. Chem. Soc. Perkin I, 999 (1974). 

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