Sodium hydride → tert-Butyl{1-[2-(7-methoxy-3-methyl-2-oxoquinoxalin-1(2H)-yl)ethyl]piperidin-4-yl}carbamate

HRID 1644454Notes

Reaction equation

HRID 1644454 reaction equation
[CH3:1][O:2][C:3]1[CH:12]=[C:11]2[C:6]([N:7]=[C:8]([CH3:14])[C:9](=[O:13])[NH:10]2)=[CH:5][CH:4]=1.[H-].[Na+].CS(O[CH2:22][CH2:23][N:24]1[CH2:29][CH2:28][CH:27]([NH:30][C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:26][CH2:25]1)(=O)=O.C(OC(=O)NC1CCN(CCN2C3C(=CC=C(OC)C=3)C=CC2=O)CC1)(C)(C)C>CC(C)=O.C(OCC)(=O)C>[C:34]([O:33][C:31](=[O:32])[NH:30][CH:27]1[CH2:28][CH2:29][N:24]([CH2:23][CH2:22][N:10]2[C:11]3[C:6](=[CH:5][CH:4]=[C:3]([O:2][CH3:1])[CH:12]=3)[N:7]=[C:8]([CH3:14])[C:9]2=[O:13])[CH2:25][CH2:26]1)([CH3:37])([CH3:36])[CH3:35]

Participants

7

Reactant 4

HCID 24758Sodium hydrideHCID 217964227-Methoxy-3-methylquinoxalin-2(1H)-one2×HCID 568344782-(4-((Tert-butoxycarbonyl)amino)piperidin-1-yl)ethyl methanesulfonate2×HCID 59371209tert-butyl {1-[2-(7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl]piperidin-4-yl}carbamate

Product 1

HCID 86642647tert-Butyl{1-[2-(7-methoxy-3-methyl-2-oxoquinoxalin-1(2H)-yl)ethyl]piperidin-4-yl}carbamateYield 10.2%

Reagents, catalysts & solvents 2

HCID 180AcetoneSolventHCID 8857Ethyl AcetateSolvent

Procedure

7-Methoxy-3-methylquinoxalin-2(1H)-one (Intermediate 161, 500 mg, 2.60 mmol) was deprotonated with sodium hydride (60% in oil, 2.90 mmol) and alkylated with 2-{4-[(tert-butoxycarbonyl)amino]piperidin-1-yl}ethyl methanesulfonate (Intermediate 6) (3.9 mmol) as described for Intermediate 2. Chromatography on silica gel with 70% ethyl acetate in hexanes, followed by a second chromatography on silica gel with 20% acetone in hexanes gave 110 mg (10%) of the product as a colorless solid.

Sources & evidence

ORD record
ord-83fd7719941e4475b847b0a912ddeb43
Source dataset
uspto-grants-2012_02
Patent number
US08124602B2

Reaction notes

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