Dimethylformamide → (R)-tert-butyl 3-((R)-(2-azidoethoxy)(3-chlorophenyl)methyl)piperidine-1-carboxylate

HRID 451928Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([C@H:8]([O:22][CH2:23][CH2:24]OS(C)(=O)=O)[C@@H:9]2[CH2:14][CH2:13][CH2:12][N:11]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:10]2)[CH:5]=[CH:6][CH:7]=1.CN(C=O)C.[N-:35]=[N+:36]=[N-:37].[Na+]>CCOC(C)=O>[N:35]([CH2:24][CH2:23][O:22][C@@H:8]([C:4]1[CH:5]=[CH:6][CH:7]=[C:2]([Cl:1])[CH:3]=1)[C@@H:9]1[CH2:14][CH2:13][CH2:12][N:11]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:10]1)=[N+:36]=[N-:37]

Participants

Conditions

Temperature: 80 °C

Procedure

(R)-tert-butyl 3-((R)-(3-chlorophenyl)(2-(methylsulfonyloxy)ethoxy)methyl)piperidine-1-carboxylate (15 g, 34 mmol) was dissolved into anhydrous DMF (150 mL), solid NaN3 (6.7 g, 102 mmol, 3 eq) was added and the reaction mixture was heated to 80° C. for overnight. The reaction mixture was cooled to rt and then was added with EtOAc (500 mL), the organic phase was washed with water (3×100 mL) and brine (2×80 mL), dried over Na2SO4 and concentrated in vacuo to provide crude (R)-tert-butyl 3-((R)-(2-azidoethoxy)(3-chlorophenyl)methyl)piperidine-1-carboxylate (13.3 g), which was used for next step without purification.

Workup

additionwas added
temperatureThe reaction mixture was cooled to rt
washthe organic phase was washed with water (3×100 mL) and brine (2×80 mL)
dry with materialdried over Na2SO4
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-df5eeeb43f444320b4edf0e3cecd1f2b
Source dataset: uspto-grants-2013_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08487108B2

Reaction notes

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