Ethyl 4-piperidinecarboxylate → ethyl 1-{(2R)-2-[(tert-butoxycarbonyl)amino]-2-phenylethyl}piperidine-4-carboxylate

HRID 64414Notes

Reaction equation

CS(O[CH2:6][C@H:7]([NH:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)(=O)=O.[NH:22]1[CH2:27][CH2:26][CH:25]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH2:24][CH2:23]1.C(N(C(C)C)CC)(C)C>C1COCC1>[C:18]([O:17][C:15]([NH:14][C@H:7]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[CH2:6][N:22]1[CH2:27][CH2:26][CH:25]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH2:24][CH2:23]1)=[O:16])([CH3:21])([CH3:20])[CH3:19]

Participants

Conditions

Temperature: 70 °C

Procedure

To a solution of 1 g of (2R)-2-[(tert-butoxycarbonyl)amino]-2-phenylethyl methanesulfonate in 5 mL of THF were added 0.4 mL of ethyl piperidine-4-carboxylate and 1 mL of diisopropylethylamine, followed by stirring at 70° C. for 14 hours, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography to obtain 160 mg of ethyl 1-{(2R)-2-[(tert-butoxycarbonyl)amino]-2-phenylethyl}piperidine-4-carboxylate.

Workup

customthe solvent was evaporated under reduced pressure
customThe obtained residue was purified by silica gel column chromatography

Sources & evidence

ORD record: ord-af5fd94627284af28a31a379107a2c06
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09447090B2

Reaction notes

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