Potassium Carbonate → (2R,5S)-4-Benzyl-2-methyl-5-(2-oxo-oxazolidin-3-ylmethyl)-piperazine-1-carboxylic acid tert-butyl ester

HRID 1475470Notes

Reaction equation

C([O-])([O-])=O.[K+].[K+].[O:7]1[CH2:11][CH2:10][NH:9][C:8]1=[O:12].[C:13]([O:17][C:18]([N:20]1[CH2:25][C@H:24]([CH2:26]Cl)[N:23]([CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH2:22][C@H:21]1[CH3:35])=[O:19])([CH3:16])([CH3:15])[CH3:14]>C(#N)C>[C:13]([O:17][C:18]([N:20]1[CH2:25][C@H:24]([CH2:26][N:9]2[CH2:10][CH2:11][O:7][C:8]2=[O:12])[N:23]([CH2:28][C:29]2[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=2)[CH2:22][C@H:21]1[CH3:35])=[O:19])([CH3:14])([CH3:15])[CH3:16]

Participants

Conditions

Temperature: 60 °C

Procedure

K2CO3 (610 mg, 4.4 mmol), KI (730 mg, 4.4 mmol) and oxazolidinone (170 mg, 2.2 mmol) were added to a solution of (2R,5R)-4-benzyl-5-chloromethyl-2-methyl-piperazine-1-carboxylic acid tert-butyl ester (500 mg, 1.47 mmol) in acetonitrile (10 mL). The reaction was stirred at 60° C. for 3 days. The solids were filtered off and the solvent was removed in vacuo. Chromatography (40% EtOAc in petrol) gave the title compound (450 mg) as a white solid, MS: [M+H]+=390.

Workup

filtrationThe solids were filtered off
customthe solvent was removed in vacuo

Sources & evidence

ORD record: ord-072f9e6939a944b8958e47db31b564c7
Source dataset: uspto-grants-2015_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09018214B2

Reaction notes

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