Tetrahydrofuran → tert-Butyl cis(+/-)-4-{[(benzyloxy)carbonyl]amino}-3-propoxypiperidine-1-carboxylate

HRID 43659Notes

Reaction equation

HRID 43659 reaction equation
[NH2:1][C@H:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4][C@H:3]1[O:15][CH2:16][CH2:17][CH3:18].C(=O)(O)[O-].[Na+].Cl[C:25]([O:27][CH2:28][C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[O:26].C1COCC1>O>[CH2:28]([O:27][C:25]([NH:1][C@H:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:12])([CH3:13])[CH3:14])=[O:9])[CH2:4][C@H:3]1[O:15][CH2:16][CH2:17][CH3:18])=[O:26])[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1

Participants

6

Reactant 4

HCID 8028TetrahydrofuranHCID 10387Benzyl chloroformateHCID 516892Sodium BicarbonateHCID 67548306Tert-butyl cis(+/-)-4-amino-3-propoxypiperidine-1-carboxylate

Product 1

HCID 86648603tert-Butyl cis(+/-)-4-{[(benzyloxy)carbonyl]amino}-3-propoxypiperidine-1-carboxylateYield 99.2%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

The same operation as in Example (103a) was performed using tert-butyl cis(±)-4-amino-3-propoxypiperidine-1-carboxylate obtained in Example (113d) (3.41 g, 13.2 mmol), sodium bicarbonate (1.26 g, 15 mmol), benzyl chloroformate (2.81 g, 16 mmol), THF (15 mL) and water (15 mL). The residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1) to obtain 5.14 g of the title compound as a colorless oily substance (99%).

Workup

  1. customThe residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1)

Sources & evidence

ORD record
ord-f0a8f61c22d149b49b16ebdedcefcc42
Source dataset
uspto-grants-2013_09
Patent number
US08536197B2

Reaction notes

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