Thionyl Chloride → 2-(S)-(4-Chloromethyl-1H-indazol-5-ylmethyl)-succinic acid dimethyl ester hydrochoride
反応式
S(Cl)([Cl:3])=O.[CH3:5][O:6][C:7](=[O:26])[C@@H:8]([CH2:14][C:15]1[C:16]([CH2:24]O)=[C:17]2[C:21](=[CH:22][CH:23]=1)[NH:20][N:19]=[CH:18]2)[CH2:9][C:10]([O:12][CH3:13])=[O:11]>ClCCl>[ClH:3].[CH3:5][O:6][C:7](=[O:26])[C@@H:8]([CH2:14][C:15]1[C:16]([CH2:24][Cl:3])=[C:17]2[C:21](=[CH:22][CH:23]=1)[NH:20][N:19]=[CH:18]2)[CH2:9][C:10]([O:12][CH3:13])=[O:11]参加物
4
実験手順
Thionyl chloride (5.0 mL) was added to a solution of 2-(S)-(4-hydroxymethyl-1H-indazol-5-ylmethyl)-succinic acid dimethyl ester (1.53 g, 5.0 mmol) in dichloromethane (30 mL). Reaction mixture was stirred at ambient temperature for 2 hours. Mixture was concentrated in vacuo. Residue was triturated in toluene (30 mL), then concentrated in vacuo. Residue was treated with dichloromethane (30 mL) then concentrated in vacuo. Desired product was obtained in 96% yield as an orange solid. 1H NMR (300 MHz, CDCl3): δ=8.22 (s, 1H), 7.49 (d, J=8.8, 1H), 7.15 (d, J=8.8, 1H), 5.12 (s, 2H), 3.56 (s, 3H), 3.52 (s, 3H), 3.05 (m, 3H), 2.69 (dd, J1=8.1, J2=16.5), 2.54 (m, 1H). MS m/e (M+H)+=325.2.