Sodium Carbonate → Methyl 3-amino-6-bromo-2-(4-(morpholinosulfonyl)phenyl)isonicotinate

反応式

[O:1]1[CH2:6][CH2:5][N:4]([S:7]([C:10]2[CH:15]=[CH:14][C:13](B(O)O)=[CH:12][CH:11]=2)(=[O:9])=[O:8])[CH2:3][CH2:2]1.[NH2:19][C:20]1[C:29](Br)=[N:28][C:27]([Br:31])=[CH:26][C:21]=1[C:22]([O:24][CH3:25])=[O:23].C(=O)([O-])[O-].[Na+].[Na+]>>[NH2:19][C:20]1[C:29]([C:13]2[CH:14]=[CH:15][C:10]([S:7]([N:4]3[CH2:5][CH2:6][O:1][CH2:2][CH2:3]3)(=[O:9])=[O:8])=[CH:11][CH:12]=2)=[N:28][C:27]([Br:31])=[CH:26][C:21]=1[C:22]([O:24][CH3:25])=[O:23]

参加物

反応物 3

HCID 10340Sodium Carbonate

HCID 441195464-(Morpholin-4-ylsulphonyl)benzeneboronic acid

HCID 53419616Methyl 3-amino-2,6-dibromoisonicotinate

生成物 1

HCID 86663067Methyl 3-amino-6-bromo-2-(4-(morpholinosulfonyl)phenyl)isonicotinate収率 76%

実験手順

A flask containing mixture of 4-(morpholinosulfonyl)-phenylboronic acid (0.920 g, 3.39 mmol), methyl 3-amino-2,6-dibromoisonicotinate (0.877 g, 2.83 mmol), tetrakistriphenylphosphine palladium(0) (0.196 g, 0.170 mmol), sodium carbonate (0.719 g, 6.79 mmol) was flushed with nitrogen. Toluene (7 mL), and MeOH (2.4 mL) were added and the reaction was heated at reflux under nitrogen for 24 hr. The reaction was partitioned between EtOAc and water. The organic phase was washed with brine, dried with sodium sulfate, and the solvent removed. Radial silica gel chromatography (step gradient elution with DCM containing 0 to 20% EtOAc) afforded methyl 3-amino-6-bromo-2-(4-(morpholinosulfonyl)phenyl)isonicotinate (982 mg, 2.15 mmol, 76% yield) as a yellow solid. MS (ESI) m/z 457.9 (M+H). 1H NMR (500 MHz, chloroform-d) δ ppm 7.80-7.91 (5H, m), 5.94 (2H, br. s.), 3.94 (3H, s), 3.68-3.79 (4H, m), 2.98-3.07 (4H, m).