“…Purification by flash column chromatography (SiO 2 , EtOAc:hexane (70:30)) gave the title compound 26 (2.5 g, 16 mmol, 91% yield) as a yellow oil. R f 0.26 (EtOAc:hexane (70:30)); 1 H NMR (300 MHz, CDCl 3 ) δ 5.43 (q, J = 6.9 Hz, 1H), 5.11 (d,J = 1.3 Hz,1H),4.81 (d,J = 2.3 Hz,1H),3.62 (dt,J = 13.2,6.3 Hz,4H), 2.42 (br s, 2H), 2.38 (t, J = 6.5 Hz, 2H), 2.32 (t, J = 6.3 Hz, 2H), 1.63 (d, J = 6.7 Hz, 3H) ppm; 13 C NMR (75 MHz, CDCl 3 ) δ 144.1 (C), 138.5 (C), 124.1 (CH), 115.9 (CH 2 ), 60.9 (CH 2 ), 60.8 (CH 2 ), 39.6 (CH 2 ), 38.6 (CH 2 ), 14.7 (CH 3 ) ppm; IR (thin film) ν max = 3339, 2936, 2882, 1441, 1045 cm −1 ; LRMS (70 eV, EI) m/z (%) 156 ([M] +• , 4%), 138 (10), 126 (36), 111 (71), 97 (100); HRMS calc for C 9 H 16 O 2 [M] +• 156.1150, found 156.1150.…”