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Lett."},{"key":"ol702548rb00009\/ol702548rb00009_1","unstructured":"Typical procedure:\u2009 To a solution of5(100 mg, 0.45 mmol) in dichloromethane (4.5 mL) were sequentially added H2O (8.0 \u03bcL, 0.45 mmol) and Hg(OTf)2(0.1 M solution in acetonitrile, 45 \u03bcL, 0.0045 mmol) at room temperature, and the mixture was stirred for 20 min at the same temperature. After addition of NaHCO3solution, organic material was extracted with dichloromethane. Dried and concentrated extract was purified by flash column chromatography on silica gel using hexane\u2212ethyl acetate (15:1) as an eluent to give6(74.7 mg, 92%, NMR yield 94%) as a colorless oil:\u2009 FTIR (neat) 2928, 2853, 1725, 1650, 1448, 1368, 1274, 1173, 1046, 983 cm-1;1H NMR (200 MHz, CDCl3) \u03b4 6.92 (dd,J= 15.4, 6.6 Hz, 1H), 5.76 (dd,J= 15.4, 1.6 Hz, 1H), 4.18 (q,J= 7.2 Hz, 1H), 2.13 (m, 1H), 1.60\u22121.85 (m, 6H), 1.29 (t,J= 7.2 Hz, 1H), 1.01\u22121.45 (m, 4H);13C NMR (50 MHz, CDCl3) \u03b4 167.1, 154.2, 118.9, 60.1, 40.4, 31.7, 25.9, 25.7, 14.2; HRMSm\/zcalcd for C11H19O2+[M + H]+183.1386, found 183.1384."},{"key":"ol702548rb00011\/ol702548rb00011_1","doi-asserted-by":"crossref","first-page":"7553","DOI":"10.1016\/S0040-4020(03)01198-0","volume":"59","author":"Chang M. Y.","year":"2003","journal-title":"Tetrahedron"},{"key":"ol702548rb00011\/ol702548rb00011_2","first-page":"1393","volume":"1377","author":"Curran D. P.","year":"1994","journal-title":"J. Chem. 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