N-bromobutanimide → HCID 57995561、化合物

反応式

[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2([C:13]([O:15][CH2:16][CH3:17])=[O:14])[CH2:12][CH2:11][CH2:10][CH2:9]2)=[CH:4][C:3]=1[O:18][CH2:19][CH:20]1[CH2:22][CH2:21]1.C1C(=O)N([Br:30])C(=O)C1>C(Cl)(Cl)(Cl)Cl.O>[NH2:1][C:2]1[C:3]([O:18][CH2:19][CH:20]2[CH2:21][CH2:22]2)=[CH:4][C:5]([C:8]2([C:13]([O:15][CH2:16][CH3:17])=[O:14])[CH2:12][CH2:11][CH2:10][CH2:9]2)=[CH:6][C:7]=1[Br:30]

参加物

実験手順

To a stirred solution of ethyl 1-(4-amino-3-(cyclopropylmethoxy)phenyl)cyclopentanecarboxylate (1.2 g, 4.0 mmol) in dry CCl4 (60 mL), NBS (0.427 g, 3.2 mmol) was added at 0° C. The reaction mixture was allowed to stir for 3 at room temperature to complete the reaction. The reaction mixture was diluted with water, extracted with DCM (2×50 mL), the combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure. The crude reaction mixture was purified by column chromatography to yield ethyl 1-(4-amino-3-bromo-5-(cyclopropylmethoxy)phenyl)cyclopentanecarboxylate (920 mg) as a yellow solid.