Sodium hydride → tert-Butyl {1-[2-(6-methyl-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]piperidin-4-yl}-carbamate

HRID 255251Notes

Reaction equation

HRID 255251 reaction equation
[CH3:1][C:2]1[CH:3]=[CH:4][C:5]2[O:10][CH2:9][C:8](=[O:11])[NH:7][C:6]=2[CH:12]=1.[H-].[Na+].CS(O[CH2:20][CH2:21][N:22]1[CH2:27][CH2:26][CH:25]([NH:28][C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:24][CH2:23]1)(=O)=O.COC1C=C2C(C=CC(=O)N2CCN2CCC(NC(=O)OC(C)(C)C)CC2)=CC=1>ClCCl.CO>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]2[O:10][CH2:9][C:8](=[O:11])[N:7]([CH2:20][CH2:21][N:22]3[CH2:27][CH2:26][CH:25]([NH:28][C:29](=[O:30])[O:31][C:32]([CH3:35])([CH3:34])[CH3:33])[CH2:24][CH2:23]3)[C:6]=2[CH:12]=1

Participants

6

Reactant 4

HCID 24758Sodium hydrideHCID 27638392H-1,4-Benzoxazine-3(4H)-one, 6-methyl-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 86642624tert-Butyl {1-[2-(6-methyl-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)ethyl]piperidin-4-yl}-carbamateYield 66%

Reagents, catalysts & solvents 1

HCID 21226129Dichloromethane methanolSolvent

Procedure

Commercially available 6-methyl-2H-1,4-benzoxazin-3(4H)-one (326 mg, 2.0 mmol) was deprotonated with sodium hydride and alkylated with 2-{4-[(tert-butoxycarbonyl)amino]piperidin-1-yl}ethyl methanesulfonate (Intermediate 6) (2.2 mmol) as described for Intermediate 2. Chromatography on silica gel with dichloromethane/methanol (20:1) gave the product in 66% yield as a colorless solid.

Sources & evidence

ORD record
ord-08b5086a2ecb4d63876e3cc0ca964b26
Source dataset
uspto-grants-2011_01
Patent number
US07875715B2

Reaction notes

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