3-(1-Benzyl-1,2,3,6-tetrahydropyridin-4-yl)quinolin-2(1H)-one → 3-(Piperidin-4-yl)quinolin-2(1H)-one

HRID 550388Notes

Reaction equation

C([N:8]1[CH2:13][CH:12]=[C:11]([C:14]2[C:15](=[O:24])[NH:16][C:17]3[C:22]([CH:23]=2)=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:10][CH2:9]1)C1C=CC=CC=1.[H][H]>CO.[Pd]>[NH:8]1[CH2:9][CH2:10][CH:11]([C:14]2[C:15](=[O:24])[NH:16][C:17]3[C:22]([CH:23]=2)=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:12][CH2:13]1

Participants

Conditions

Temperature: 50 °C

Procedure

A solution of 3-(1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)quinolin-2-(1H)-one (4.00 g, 12.6 mmol) in methanol (500 mL) was degassed with argon, and 10% palladium on carbon (1.2 g) added. The reaction was placed under 1 atm hydrogen and heated to 50° C. for 5.5 h. The reaction was cooled and filtered through celite. Concentration provided the title compound, 2.7 g. MS: m/z=229 (M+1). 1H NMR (500 MHz, CD3OD) δ 7.80 (s, 1H), 7.67 (d, J=8 Hz, 1H), 7.51 (t, J=8 Hz, 1H), 7.33 (d, J=8 Hz, 1H), 7.25 (t, J=8 Hz, 1H), 3.52 (t, J=12 Hz, 2H), 3.17 (dt, J=3, 13 Hz, 2H), 3.15 (m, overlaps with δ3.17 peak, 1H), 2.18 (d, J=14 Hz, 2H), 1.91 (dq, J=3, 12 Hz, 2H).

Workup

additionadded
temperatureThe reaction was cooled
filtrationfiltered through celite
concentrationConcentration

Sources & evidence

ORD record: ord-b1404824af874e26a4824198a127440e
Source dataset: uspto-grants-2011_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07947678B2

Reaction notes

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