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Sodium Bicarbonate → Ethyl cis(+/-)-2-(4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidin-1-yl)-5-ethyl-1,3-oxazole-4-carboxylate

HRID 43638
Notes
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Reaction equation

HRID 43638 reaction equation
[C:1]([N:4]1[CH2:9][CH2:8][C@H:7]([NH:10][C:11](=[O:20])[O:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C@H:6]([O:21][CH3:22])[CH2:5]1)(=[O:3])[NH2:2].Br[CH:24]([CH2:34][CH3:35])[C:25](=O)[C:26]([O:28][CH2:29][CH2:30]CC)=[O:27].C(=O)(O)[O-].[Na+]>C1COCC1>[CH2:13]([O:12][C:11]([NH:10][C@H:7]1[CH2:8][CH2:9][N:4]([C:1]2[O:3][C:24]([CH2:34][CH3:35])=[C:25]([C:26]([O:28][CH2:29][CH3:30])=[O:27])[N:2]=2)[CH2:5][C@H:6]1[O:21][CH3:22])=[O:20])[C:14]1[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 516892Sodium BicarbonateHCID 86648534Butyl 3-bromo-2-oxopentanoateHCID 131730860cis(+/-)-Benzyl (1-carbamoyl-3-methoxypiperidin-4-yl)carbamate

Product 1

HCID 131730862Ethyl cis(+/-)-2-(4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidin-1-yl)-5-ethyl-1,3-oxazole-4-carboxylateYield 108.6%

Reagents, catalysts & solvents 1

HCID 8028
Tetrahydrofuran
Solvent

Procedure

The same operation as in Example (103c) was performed using cis(±)-benzyl (1-carbamoyl-3-methoxypiperidin-4-yl)carbamate obtained in Example (103b) (0.98 g, 3.2 mmol), butyl 3-bromo-2-oxopentanoate obtained in Example (110a) (5 g, 19.9 mmol), sodium bicarbonate (0.63 g, 7.5 mmol) and THF (20 mL). The resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1, 2/1, 4/1) to obtain 1.5 g of the title compound as a yellow solid (100%).

Workup

  1. customThe resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1, 2/1, 4/1)

Sources & evidence

ORD record
ord-1f3a1c011707411db1f9f96b56789e8e
Source dataset
uspto-grants-2013_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08536197B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes