Hydrochloric Acid → Methyl(2S,3S,5S)-5-tert-butoxy-3-[(hydroxyamino)carbonyl]-2-[(4-phenylpiperazin-1-yl)carbonyl]piperidine-1-carboxylate

HRID 535087Notes

Reaction equation

HRID 535087 reaction equation
[C:1]([O:5][C@@H:6]1[CH2:11][N:10]([C:12]([O:14][CH3:15])=[O:13])[C@H:9]([C:16]([N:18]2[CH2:23][CH2:22][N:21]([C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=3)[CH2:20][CH2:19]2)=[O:17])[C@@H:8]([C:30]([O:32]C)=O)[CH2:7]1)([CH3:4])([CH3:3])[CH3:2].[OH:34][NH2:35].Cl.NO.C[O-].[Na+].Cl>CO>[C:1]([O:5][C@@H:6]1[CH2:11][N:10]([C:12]([O:14][CH3:15])=[O:13])[C@H:9]([C:16]([N:18]2[CH2:19][CH2:20][N:21]([C:24]3[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=3)[CH2:22][CH2:23]2)=[O:17])[C@@H:8]([C:30]([NH:35][OH:34])=[O:32])[CH2:7]1)([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 5

HCID 313Hydrochloric AcidHCID 787HydroxylamineHCID 443297Hydroxyamine hydrochlorideHCID 10942334Sodium MethoxideHCID 67304316dimethyl(2S,3S,5S)-5-tert-butoxy-2-[(4-phenylpiperazin-1-yl)carbonyl]piperidine-1,3-dicarboxylate

Product 1

HCID 86598261Methyl(2S,3S,5S)-5-tert-butoxy-3-[(hydroxyamino)carbonyl]-2-[(4-phenylpiperazin-1-yl)carbonyl]piperidine-1-carboxylateYield 45%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

To a solution of dimethyl (2S,3S,5S)-5-tert-butoxy-2-[(4-phenylpiperazin-1-yl)carbonyl]piperidine-1,3-dicarboxylate (0.038 g, 0.000082 mol) in methanol (0.30 mL, 0.0074 mol) was added 1.640 M of N-hydroxyamine in methanol (1.004 mL), freshly made from the corresponding hydroxylamine HCl salt and sodium methoxide. The mixture was stirred at rt for 1 h then acidified with 1N HCl. The resulting mixture was applied directly on RP-HPLC to give the targeted product as a TFA salt (10 mg, 45%). MS (ESI): (M+H)+=463.2.

Sources & evidence

ORD record
ord-6e50c332813d4b1d8bb44436410eade7
Source dataset
uspto-grants-2014_10
Patent number
US08853243B2

Reaction notes

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