Water → 5-bromo-1-methyl-3-[[5-[(2R)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]-2-pyridyl]amino]pyridin-2-one

HRID 1026464Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[C:4]([NH:10][C:11]2[CH:16]=[CH:15][C:14]([N:17]3[CH2:22][CH2:21][N:20]([CH3:23])[CH2:19][C@H:18]3[CH3:24])=[CH:13][N:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[CH:7]=1.[O:25]1[CH2:28]C(=O)[CH2:26]1.[BH3-]C#N.[Na+].O>CO.[Cl-].[Zn+2].[Cl-]>[Br:1][C:2]1[CH:3]=[C:4]([NH:10][C:11]2[CH:16]=[CH:15][C:14]([N:17]3[CH2:22][CH2:21][N:20]([CH:23]4[CH2:28][O:25][CH2:26]4)[CH2:19][C@H:18]3[CH3:24])=[CH:13][N:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[CH:7]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of 115e (40.0 g, 106 mmol), oxetan-3-one (11.4 g, 159 mmol), NaBH3CN (10.0 g, 159 mmol), and zinc chloride (21.3 g, 159 mmol) in methanol (700 mL) was stirred at 50° C. for 5 hours. water (50 mL) was added to the mixture and concentrated under reduced pressure. The residue was extracted with dichloromethane (3×200 mL) and the combined organic layer was concentrated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 40:1 dichloromethane/methanol to afford 115f (35 g, 73%). MS: [M+H]+ 434.

Workup

concentrationconcentrated under reduced pressure
extractionThe residue was extracted with dichloromethane (3×200 mL)
concentrationthe combined organic layer was concentrated under reduced pressure
customThe residue was purified by silica-gel column chromatography
washeluting with 40:1 dichloromethane/methanol

Sources & evidence

ORD record: ord-d2286580d7494f38858527b8acbdcea5
Source dataset: uspto-grants-2014_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08729072B2

Reaction notes

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