反应详情

Compound 14 was prepared from Compound 7 using the same procedure as described above for Compound 13. Yield 3.69 g (70.3%) as an oil. Rf=0.55 (hexane:ethyl acetate 95:5); IR (neat) 2932, 1457, 1422, 1208, 1066 702 cm−1; 1H NMR δ 6.48 (d, J=2.4 Hz, 2H), 6.35 (t, J=2.1 Hz, 1H), 3.80 (s, 6H), 1.72–1.55 (m, 6H), 1.45–1.39 (m, 1H), 1.21 (s, 6H), 1.18–1.05 (m, 2H), 0.97–0.85 (m, 2H); 13C NMR δ 160.52, 153.48, 105.35, 96.64, 55.44, 49.28, 41.06, 28.18, 27.44, 26.96, 25.50; MS: (ESI, Pos.) m/z 263 ([M+H]+).