1,4-Dioxane hydrochloride → (R)-5-Bromo-1-methyl-3-(5-(2-methylpiperazin-1-yl)pyridin-2-ylamino)pyridin-2(1H)-one

HRID 1843219Notes

Reaction equation

HRID 1843219 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([NH:10][C:11]2[N:16]=[CH:15][C:14]([N:17]3[CH2:22][CH2:21][N:20](C(OC(C)(C)C)=O)[CH2:19][C@H:18]3[CH3:30])=[CH:13][CH:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[CH:7]=1.Cl.O1CCOCC1>CO>[Br:1][C:2]1[CH:3]=[C:4]([NH:10][C:11]2[CH:12]=[CH:13][C:14]([N:17]3[CH2:22][CH2:21][NH:20][CH2:19][C@H:18]3[CH3:30])=[CH:15][N:16]=2)[C:5](=[O:9])[N:6]([CH3:8])[CH:7]=1

Participants

4

Reactant 2

HCID 204431481,4-Dioxane hydrochlorideHCID 86683718(R)-tert-Butyl 4-(6-(5-Bromo-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)pyridin-3-yl)-3-methylpiperazine-1-carboxylate

Product 1

HCID 86683719(R)-5-Bromo-1-methyl-3-(5-(2-methylpiperazin-1-yl)pyridin-2-ylamino)pyridin-2(1H)-oneYield 95%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a mixture of 115c (600 mg, 1.26 mmol) in methanol (20 mL) was added HCl/dioxane (4M, 4 mL). The reaction mixture was stirred at room temperature for 4 h. It was then concentrated under reduced pressure. The residue was basified with aqueous 1M NaOH and extracted with dichloromethane (3×30 mL). The combined organic layer was washed with brine and concentrated under reduced pressure to afford 115d (450 mg, 95%) as a yellow solid. MS-ESI: [M+H]+ 378.

Workup

  1. concentrationIt was then concentrated under reduced pressure
  2. extractionextracted with dichloromethane (3×30 mL)
  3. washThe combined organic layer was washed with brine
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-4fc36d025e024d5eb4f85aa8eb488895
Source dataset
uspto-grants-2015_02
Patent number
US08946213B2

Reaction notes

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