Acetic Acid → HCID 67045353, compound

HRID 875633Notes

Reaction equation

[CH3:1][C@@H:2]1[CH2:7][CH2:6][NH:5][CH2:4][C@H:3]1[NH:8][P:9](=[O:16])([O:13][CH2:14][CH3:15])[O:10][CH2:11][CH3:12].[CH:17](=O)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C(O)(=O)C.[BH3-]C#N.[Na+]>CO>[CH2:17]([N:5]1[CH2:6][CH2:7][C@@H:2]([CH3:1])[C@H:3]([NH:8][P:9](=[O:16])([O:13][CH2:14][CH3:15])[O:10][CH2:11][CH3:12])[CH2:4]1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A mixture of diethyl trans-4-methylpiperidin-3-ylphosphoramidate (0.63 g, 2.52 mmol), benzaldehyde (0.38 mL, 3.78 mmol) and acetic acid (0.29 mL, 5.03 mmol) in methanol (20 mL) was stirred at 0° C. for 30 minutes. NaCNBH3 (0.24 g, 3.78 mmol) was added at 0° C. The resulting solution was warmed to room temperature and stirred at room temperature for 1 hour. The solvent was removed in vacuo, and saturated sodium bicarbonate (20 mL) and ethyl acetate (30 mL) were added. The organic layer was separated, washed with brine, dried (sodium sulfate) and concentrated in vacuo to give diethyl trans-1-benzyl-4-methylpiperidin-3-ylphosphoramidate (0.85 g, 99%), which was used directly in the next step without purification.

Workup

temperatureThe resulting solution was warmed to room temperature
stirringstirred at room temperature for 1 hour
customThe solvent was removed in vacuo, and saturated sodium bicarbonate (20 mL) and ethyl acetate (30 mL)
additionwere added
customThe organic layer was separated
washwashed with brine
dry with materialdried (sodium sulfate)
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-b107e75ef17b4b9ba8e3c05c40218ab5
Source dataset: uspto-grants-2015_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08981085B2

Reaction notes

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