Ammonium Acetate → 1-[8-(4-{[tert-Butyl(dimethyl)silyl]oxy}piperidin-1-yl)-5-chloroquinolin-7-yl]ethanamine

HRID 1192534Notes

Reaction equation

[Si:1]([O:8][CH:9]1[CH2:14][CH2:13][N:12]([C:15]2[C:16]([C:26](=O)[CH3:27])=[CH:17][C:18]([Cl:25])=[C:19]3[C:24]=2[N:23]=[CH:22][CH:21]=[CH:20]3)[CH2:11][CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].C([O-])(=O)C.[NH4+].C([BH3-])#[N:35].[Na+]>CO.C(#N)C>[Si:1]([O:8][CH:9]1[CH2:14][CH2:13][N:12]([C:15]2[C:16]([CH:26]([NH2:35])[CH3:27])=[CH:17][C:18]([Cl:25])=[C:19]3[C:24]=2[N:23]=[CH:22][CH:21]=[CH:20]3)[CH2:11][CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 65 °C

Procedure

A mixture of 1-[8-(4-{[tert-butyl(dimethyl)silyl]oxy}piperidin-1-yl)-5-chloroquinolin-7-yl]ethanone (275 mg, 0.656 mmol) and ammonium acetate (506 mg, 6.56 mmol) in methanol (3.7 mL) and acetonitrile (3.7 mL) was heated at 65° C. in a sealed tube for 30 minutes. After cooling to room temperature, sodium cyanoborohydride (82.5 mg, 1.31 mmol) was added to the resulting mixture. The reaction was heated at 65° C. for another 4 hours, then cooled to room temperature, quenched with sat. sodium bicarbonate and extracted with dichloromethane. The combined extracts were dried over magnesium sulfate and evaporated to dryness. The residue was used directly in the next step. LCMS calculated for C22H35ClN3OSi (M+H)+: m/z=421.2; Found: 421.1.

Workup

temperatureAfter cooling to room temperature
temperatureThe reaction was heated at 65° C. for another 4 hours
temperaturecooled to room temperature
customquenched with sat. sodium bicarbonate
extractionextracted with dichloromethane
dry with materialThe combined extracts were dried over magnesium sulfate
customevaporated to dryness

Sources & evidence

ORD record: ord-54e384467a454e8c9dca4ff4170b8aaf
Source dataset: uspto-grants-2014_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08680108B2

Reaction notes

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