Ethyl Acetate → (2R,5S)-2-Azidomethyl-5-(3-trifluoromethoxy-phenylcarbamoyl)-pyrrolidine-1-carboxylic acid benzyl ester

HRID 1527349Notes

Reaction equation

[CH2:1]([O:8][C:9]([N:11]1[C@H:15]([C:16](=[O:29])[NH:17][C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([O:24][C:25]([F:28])([F:27])[F:26])[CH:19]=2)[CH2:14][CH2:13][C@@H:12]1[CH2:30]OS(C)(=O)=O)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[N-:36]=[N+:37]=[N-:38].[Na+].CCOC(C)=O>CN(C=O)C.O>[CH2:1]([O:8][C:9]([N:11]1[C@H:15]([C:16](=[O:29])[NH:17][C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([O:24][C:25]([F:28])([F:27])[F:26])[CH:19]=2)[CH2:14][CH2:13][C@@H:12]1[CH2:30][N:36]=[N+:37]=[N-:38])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of (2R,5S)-2-methanesulfonyloxymethyl-5-(3-trifluoromethoxy-phenylcarbamoyl)-pyrrolidine-1-carboxylic acid benzyl ester (589 mg, 1.14 mmol) in DMF (4.5 mL) was added a solution of sodium azide (371 mg, 5.7 mmol) in water (0.5 mL) and the mixture was stirred at 80° C. under nitrogen atmosphere overnight. EtOAc and a water were added, the layers were separated and the aqueous one back-extracted with EtOAc. The combined organic extracts were washed with brine, dried over Na2SO4, filtered and concentrated. The crude residue was purified by flash column chromatography on silica gel (c-hexane/EtOAc gradient 100:0 to 6:5) to give the desired compound. MS (LC-MS): 464 [MH−Boc]+; tR (HPLC conditions b) 5.73 min.

Workup

customthe layers were separated
extractionthe aqueous one back-extracted with EtOAc
washThe combined organic extracts were washed with brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated
customThe crude residue was purified by flash column chromatography on silica gel (c-hexane/EtOAc gradient 100:0 to 6:5)

Sources & evidence

ORD record: ord-86d8b1d516274f08a76080c739338619
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09085555B2

Reaction notes

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