反应详情

BH3-THF complex (1.0 M sol., 0.13 mL, 0.13 mmol) was added to a solution of [4-(N-benzyloxycarbonylamino)-2-nitronaphthalen-1-yl]acetic acid (40.0 mg, 0.11 mmol) in THF (5 mL) under N2 atmosphere and stirred overnight. The reaction mixture was treated with saturated aqueous NH4Cl (1 mL) and extracted with AcOEt (20 mL), The organic layer was washed with saturated aqueous NaCl (5 mL), dried (Na2SO4) and concentrated under reduced pressure. Flash chromatography (25% AcOEt-Petroleum ether) afforded 2-[4-(N-benzyloxycarbonylamino)-2-nitronaphthalen-1-yl]ethanol (21.2 mg, 53%) as a dark red solid. M.p. 128-130° C.; 1H NMR (CDCl3, 500 MHz) δ 8.24 (d, 9.0, 1H), 7.88 (d, 8.0, 1H), 7.66 (t, 7.5, 1H), 7.60 (t, 7.5, 1H), 7.45 (d, 7.5, 2H), 7.41 (t, 7.5, 2H), 7.35 (t, 7.5, 1H), 6.92 (s, 1H), 4.87 (brs, 1H), 4.50 (d, 5.0, 2H), 4.05 (t, 8.5, 2H), 3.40 (t, 7.0, 2H), 1.84 (brs, 1H); IR (neat) 3406, 2936, 2892, 1594, 1519, 1435, 1342, 1124, 1036, 912, 823, 752, 699 cm−1. FABMS (NBA) m/z 322 (M−CO2+), ESMS m/z 323 (M−CO2+H+), 645 ((M−CO2)×2+H+).

1. extractionextracted with AcOEt (20 mL)
2. washThe organic layer was washed with saturated aqueous NaCl (5 mL)
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated under reduced pressure