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Water → (S)-5-bromo-3-(5-(2-ethyl-4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-ylamino)-1-methylpyridin-2(1H)-one

HRID 1026456
Notes
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Reaction equation

HRID 1026456 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][NH:20][CH2:19][C@@H:18]3[CH2:23][CH3:24])=[CH:13][N:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[CH:7]=1.[O:25]1[CH2:28][C:27](=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:27]4[CH2:28][O:25][CH2:26]4)[CH2:19][C@@H:18]3[CH2:23][CH3:24])=[CH:13][N:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[CH:7]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 962WaterHCID 5003444Sodium cyanoborohydrideHCID 150242543-OxetanoneHCID 86683741(S)-5-Bromo-3-(5-(2-ethylpiperazin-1-yl)pyridin-2-ylamino)-1-methylpyridin-2(1H)-one

Product 1

HCID 86683708(S)-5-bromo-3-(5-(2-ethyl-4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-ylamino)-1-methylpyridin-2(1H)-oneYield 68%

Reagents, catalysts & solvents

2
HCID 3007855ZincchlorideCatalystHCID 887MethanolSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of 114d (263 mg, 0.67 mmol), oxetan-3-one (96 mg, 1.34 mmol), NaBH3CN 104 mg, 1.68 mmol), and zinc chloride (227 mg, 1.68 mmol) in methanol (10 mL) was stirred at 50° C. for 5 hours. water (10 mL) was then added to the reaction. The resulting mixture was concentrated under reduced pressure. The residue was extracted with dichloromethane three times. The combined organic layer was concentrated under reduced pressure and the residue was purified by silica-gel column chromatography eluting with 50:1 dichloromethane/methanol to afford 114e (203 mg, 68%). MS: [M+H]+ 448.

Workup

  1. concentrationThe resulting mixture was concentrated under reduced pressure
  2. extractionThe residue was extracted with dichloromethane three times
  3. concentrationThe combined organic layer was concentrated under reduced pressure
  4. customthe residue was purified by silica-gel column chromatography
  5. washeluting with 50:1 dichloromethane/methanol

Sources & evidence

ORD record
ord-857daf44ab56430b9ef53dc8a77972f0
Source dataset
uspto-grants-2014_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08729072B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes