Methanol → 2-[3-Methoxymethyl-4-(2-nitro-benzenesulfonyl)-piperazine-1-yl]-3-naphthalen-2-yl-propionic acid methyl ester
反応式
[CH3:1][O:2][C:3](=[O:38])[CH:4]([N:16]1[CH2:21][CH2:20][N:19]([S:22]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=2[N+:31]([O-:33])=[O:32])(=[O:24])=[O:23])[CH:18]([CH2:34][O:35][CH3:36])[C:17]1=O)[CH2:5][C:6]1[CH:15]=[CH:14][C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[CH:7]=1.CO>C1COCC1>[CH3:1][O:2][C:3](=[O:38])[CH:4]([N:16]1[CH2:21][CH2:20][N:19]([S:22]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=2[N+:31]([O-:33])=[O:32])(=[O:23])=[O:24])[CH:18]([CH2:34][O:35][CH3:36])[CH2:17]1)[CH2:5][C:6]1[CH:15]=[CH:14][C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[CH:7]=1参加物
4
実験手順
To a solution of 2-[3-methoxymethyl-4(2-nitro-benzenesulfonyl)-2-oxo-piperazin-1-yl]-3-naphthalen-2-yl-propionic acid methyl ester, 60, (5.6 g, 10.4 mmol) in anhydrous THF (10 mL) is added 1.0M borane-tetrahydrofuran complex (31.2 mL) at −20° C. The reaction mixture is stirred at this temperature overnight. Methanol (3 mL) is added to the reaction mixture at −20° C. and allowed to stir for twenty minutes. Additional methanol (6 mL) is and the reaction mixture is allowed to warm to the room temperature. The solvent is removed in vacuo and the product purified over silica (EtOAc/Hexane, 1:1) to afford 3.5 g (64% yield) of the desired product. 1H NMR (CDCl3, δ): 8.05 (m, 1H), 7.75 (m,3H), 7.62 (m, 4H), 7.50 (m, 2H), 7.30 (dd, J=8.4, 2.1 Hz, 1H), 3.94 (t, J=6.3 Hz, 1H), 3.66 (s, 3H), 3.58 (t, J=6.8 Hz, 1H), 3.30–2.95 (m, 7H), 2.82 (s, 3H), 2.79 (m, 2H), 2.40 (dt, J=12.7, 4.3 Hz, 1H); 13C NMR, δ 171.8, 148.0, 136.0, 134.1, 133.7, 132.4, 132.0, 131.5, 128.1, 127.9, 127.7, 126.3, 125.8, 124.5, 69.5, 68.7, 58.7, 53.8, 52.8, 51.6, 46.6, 42.8, 35.4.