反应详情

--DEAD (470 mg, 2.70 mmol) in THF (3 ml) was added dropwise via syringe to a stirring solution of (R)-(+)-2-fluorooctanol (396 mg, 2.70 mmol), the hydroxypyrimidine 33 (750 mg, 2.70 mmol) and triphenylphosphine (707 mg, 2.70 mmol) in THF (10 ml) under nitrogen at ambient temperature for 15 h. The solvent was removed in vacuo and the residue was purified by flash chromatography (3 to 5% ethyl acetate-light petroleum) to give the 2-fluorooctyloxypyrimidine 34 (610 mg, 55%) (from MeOH), m.p. 74.7° C.; [α]D25 -3.6° (c 2.7 in CHCl3); νmax /cm-1 (KBr) 2950, 2920, 1575, 1545, 1460, 1440, 1280, 1210, 1130, 1080 and 995; δ 0.90 (6H, overlapping t, Me), 1.26-1.93 (16H, m), 2.70 (2H, t, ArCH2), 4.22 (2H, dd, 3JHF 22 and Jvic 4, OCH2), 4.87 (1H, d of sext, 2JHF 49 and J4, CHF), 7.02 (1H ddd, J7.5, 7 and 2, 5'-H), 7.6 (1H, ddd, J7.5, 7 and 2, 6'-H) and 8.55 (2H, s, 4- and 6-H); m/z 408 (M+), 365, 351, 291, 278, 250 and 221.

1. customThe solvent was removed in vacuo
2. customthe residue was purified by flash chromatography (3 to 5% ethyl acetate-light petroleum)