Water → tert-butyl (6R,7R)-6-[2-amino-2-(hydroxyimino)ethyl]-7-(3,4-dichlorophenyl)-1,4-oxazepane-4-carboxylate

HRID 1022707Notes

Reaction equation

C(=O)([O-])O.[Na+].Cl.[NH2:7][OH:8].[C:9]([CH2:11][C@H:12]1[C@H:18]([C:19]2[CH:24]=[CH:23][C:22]([Cl:25])=[C:21]([Cl:26])[CH:20]=2)[O:17][CH2:16][CH2:15][N:14]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:13]1)#[N:10].O>CS(C)=O>[NH2:10][C:9](=[N:7][OH:8])[CH2:11][C@H:12]1[C@H:18]([C:19]2[CH:24]=[CH:23][C:22]([Cl:25])=[C:21]([Cl:26])[CH:20]=2)[O:17][CH2:16][CH2:15][N:14]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:13]1

Participants

Conditions

Temperature: 80 °C

Procedure

Sodium hydrogen carbonate (872 mg, 10.38 mmol) was added to a suspension of hydroxylamine monohydrochloride (721 mg, 10.38 mmol) in DMSO (3 mL), and the mixture was stirred at 80° C. for 15 min. The precipitate was filtered off, and a solution of tert-butyl (6R,7R)-6-(cyanomethyl)-7-(3,4-dichlorophenyl)-1,4-oxazepane-4-carboxylate (500 mg, 1.30 mmol) in DMSO (4 mL) was added to the filtrate. The reaction mixture was stirred at 80° C. overnight. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The extract was washed with brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure to give the title compound (588 mg). This compound was used for the next reaction without purification.

Workup

filtrationThe precipitate was filtered off
stirringThe reaction mixture was stirred at 80° C. overnight
extractionthe mixture was extracted with ethyl acetate
washThe extract was washed with brine
dry with materialdried over anhydrous sodium sulfate
customThe solvent was evaporated under reduced pressure

Sources & evidence

ORD record: ord-d9b419520b7c4e3cb54555168c21952c
Source dataset: uspto-grants-2014_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08722662B2

Reaction notes

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