Methanamine, N-methoxy-, hydrochloride (1:1) → tert-Butyl 4-(methoxy(methyl)carbamoyl)piperidine-1-carboxylate

HRID 2206641Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]([OH:16])=O)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.[CH3:18][NH:19][O:20][CH3:21].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(C(C)C)C(C)C)C>ClCCl>[CH3:21][O:20][N:19]([CH3:18])[C:14]([CH:11]1[CH2:10][CH2:9][N:8]([C:6]([O:5][C:1]([CH3:2])([CH3:3])[CH3:4])=[O:7])[CH2:13][CH2:12]1)=[O:16]

Participants

Conditions

Temperature: 30 °C

Procedure

To a solution of 1-(tert-butoxycarbonyl)piperidin-4-carboxylic acid (5.0 g, 21.8 mmol) in dichloromethane (80 mL) were added N,O-dimethylhydroxylamine hydrochloride (2.55 g, 26.1 mmol), 2-(3H-[1,2,3]triazolo[4,5-b]pyridin-3-yl)-1,1,3,3-tetramethylisouronium hexafluorophosphate(V) (9.95 g, 26.1 mmol), N-ethyl-N-isopropylpropan-2-amine (8.46 g, 65.42 mmol) and stirred at 30° C. for 16 hours. The reaction was quenched by adding water (100 ml) and extracted with ethyl acetate (200 ml*3). The combined organic layers was washed with brine, dried over sodium sulfate and concentrated under vacuum to give tert-butyl 4-(methoxy(methyl)carbamoyl)piperidine-1-carboxylate (5.7 g, yield 97.6%). LRMS (M+H+) m/z: calcd 272.17. found 273.17.

Workup

customThe reaction was quenched
additionby adding water (100 ml)
extractionextracted with ethyl acetate (200 ml*3)
washThe combined organic layers was washed with brine
dry with materialdried over sodium sulfate
concentrationconcentrated under vacuum

Sources & evidence

ORD record: ord-ff74b01035a44e2fbec84f27a614ff1c
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09371331B2

Reaction notes

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