Triethylamine → (S)-1-Boc-3-(Cbz-amino-methyl)-piperidine

HRID 2062266Notes

Reaction equation

[NH2:1][CH2:2][C@@H:3]1[CH2:8][CH2:7][CH2:6][N:5]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:4]1.C(N(CC)CC)C.Cl[C:24]([O:26][CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:25]>C(Cl)Cl>[CH2:27]([O:26][C:24](=[O:25])[NH:1][CH2:2][C@@H:3]1[CH2:8][CH2:7][CH2:6][N:5]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:4]1)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1

Participants

Conditions

Temperature: 0 °C

Procedure

(S)-tert-Butyl 3-(aminomethyl)piperidine-1-carboxylate (1.00 g, 4.67 mmol) was dissolved in 14 mL anhydrous CH2Cl2 under an N2 atmosphere and cooled to 0° C. Triethylamine (1.30 mL, 945 mg, 9.34 mmol) was added followed by the dropwise addition of benzyl chloroformate (0.99 mL, 1.20 g, 7.00 mmol). After 16 h, the reaction mixture was partitioned between H2O and CH2Cl2, and separated, and the aqueous layer was extracted twice with CH2Cl2. The organic layers were combined, dried over Na2SO4, filtered, and concentrated to a light yellow oil. Purification via silica gel chromatography using 97% CH2Cl2/3% MeOH gave benzyl((S)-1-(tert-butoxycarbonyl)piperidin-3-yl)methylcarbamate as a clear colorless oil (895 mg, 55%). LC/MS: m/z 349.5 (M+H)+ at 3.21 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Workup

customthe reaction mixture was partitioned between H2O and CH2Cl2
customseparated
extractionthe aqueous layer was extracted twice with CH2Cl2
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated to a light yellow oil
customPurification via silica gel chromatography

Sources & evidence

ORD record: ord-62e78cb6d71e438683b1b5e7e3e9f2ba
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08283354B2

Reaction notes

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