反应详情

The TBDMS ether 10 (0.37 g, 0.66 mmol) in THF (20 mL) was deprotected (Method A: Bu4NF (0.8 ml, 0.8 mmol)) to give the product (flash column chromatography 80% EtOAc/20% n-hexane, then EtOAc) as a colourless oil (0.29 g, 97%). [α]D22.1−69.6° (c=0.23, CHCl3), 1H NMR (CDCl3) δ 8.72 (s, 1H), 7.76 (s, 1H), 7.34 (d, J=8.6 Hz, 2H), 6./90 (d, J=8.6 Hz, 2H), 6.80 (s, 1H), 5.10 (m, 2H), 4.40 (m, 1H), 4.30 (m, 1H), 3.92 (s, 3H), 3.83 (s, 3H), 3.80 (m, 4H), 3.7 (m, 1H), 3.58 (m, 1H), 3.45 (m, 1H), 2.15 (m, 1H), 1.90 (m, 1H), 1.70 (m, 2H). IR (neat) 3338, 2958, 2837, 1726, 1599 cm−1.