Potassium Iodide → Ethyl 4-(dibenzylamino)-3-methoxypiperidine-1-carboxylate

HRID 2053291Notes

Reaction equation

[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][CH2:11][CH3:12])=[O:9])[CH2:4][CH:3]1[O:13][CH3:14].[CH2:15](Br)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.C(=O)([O-])[O-].[K+].[K+].[I-].[K+]>CN(C=O)C.O>[CH2:15]([N:1]([CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][CH2:11][CH3:12])=[O:9])[CH2:4][CH:3]1[O:13][CH3:14])[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of racemic ethyl 4-amino-3-methoxypiperidine-1-carboxylate (1 part by mole) in DMF were added benzyl bromide (about 2.2 part by mole), potassium carbonate (about 2.4 part by mole) and potassium iodide (about 0.2 part by mole) respectively. The reaction was heated to about 80° C. (in the specification, delta, or “Δ,” refers to heat). After about 6 hours, the reaction was slowly diluted with water (about 12 parts by volume) and extracted with, for example, ethyl acetate. The organic layer was washed with brine and then dried over anhyh. Na2SO4. Subsequent filtration and concentration of the solvent provided the 1 as the yellow-orange oil (1 part by mole).

Workup

temperatureto heat)
extractionextracted with, for example, ethyl acetate
washThe organic layer was washed with brine
customdried over anhyh
filtrationSubsequent filtration and concentration of the solvent
customprovided the 1 as the yellow-orange oil (1 part by mole)

Sources & evidence

ORD record: ord-e302acb1816f4d00abc7b197530fa390
Source dataset: uspto-grants-2008_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07326787B2

Reaction notes

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