Benzyl chloroformate → HCID 58745550, compound

HRID 402085Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C@@H:11]([NH2:14])[C@H:10]([OH:15])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)(O)[O-].[Na+].Cl[C:22]([O:24][CH2:25][C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1)=[O:23]>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C@@H:11]([NH:14][C:22]([O:24][CH2:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)=[O:23])[C@H:10]([OH:15])[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 2.5 °C

Procedure

To a stirred solution of (±)-trans-4-amino-3-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (9.48 mmol, 2.05 g) in a biphasic mixture of DCM (10 mL) and saturated sodium bicarbonate (10 mL) at 0° C. was added benzyl chloroformate (2.0 mL) drop-wise and continued stirring at 0-5° C. for 1 h. The organic layer was separated, and the aqueous layer was extracted with DCM. The combined organic layers were dried, filtered and concentrated under reduced pressure. The residue was purified by flash silica gel column chromatography by eluting with 50% ethyl acetate in hexanes to provide (±)-trans-4-benzyloxycarbonylamino-3-hydroxy-piperidine-1-carboxylic acid tert-butyl ester.

Workup

customThe organic layer was separated
extractionthe aqueous layer was extracted with DCM
customThe combined organic layers were dried
filtrationfiltered
concentrationconcentrated under reduced pressure
customThe residue was purified by flash silica gel column chromatography
washby eluting with 50% ethyl acetate in hexanes

Sources & evidence

ORD record: ord-c4bfb5e188a34eb5974b7734bba8348b
Source dataset: uspto-grants-2014_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08741900B2

Reaction notes

Loading…