Formaldehyde → 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-1-hydroxymethyl-3,4-dihydro-1H-quinolin-2-one

HRID 1774673Notes

Reaction equation

[S:1]1[CH:5]=[CH:4][C:3]2[C:6]([N:10]3[CH2:15][CH2:14][N:13]([CH2:16][CH2:17][CH2:18][CH2:19][O:20][C:21]4[CH:30]=[C:29]5[C:24]([CH2:25][CH2:26][C:27](=[O:31])[NH:28]5)=[CH:23][CH:22]=4)[CH2:12][CH2:11]3)=[CH:7][CH:8]=[CH:9][C:2]1=2.[CH2:32]=[O:33].C(N(CC)CC)C.O>CN(C=O)C>[S:1]1[CH:5]=[CH:4][C:3]2[C:6]([N:10]3[CH2:11][CH2:12][N:13]([CH2:16][CH2:17][CH2:18][CH2:19][O:20][C:21]4[CH:30]=[C:29]5[C:24]([CH2:25][CH2:26][C:27](=[O:31])[N:28]5[CH2:32][OH:33])=[CH:23][CH:22]=4)[CH2:14][CH2:15]3)=[CH:7][CH:8]=[CH:9][C:2]1=2

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-3,4-dihydro-1H-quinolin-2-one (1 g) synthesized in the same manner as in WO2006/112464 (Example 11) in DMF (10 ml) were added 37% aqueous formalin solution (3.7 ml) and triethylamine (0.05 ml), and the mixture was heated at 80° C. for 20 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate, and dried over magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography (dichloromethane:methanol=30:1) to give a mixture (1 g, 3:2) of 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-1-hydroxymethyl-3,4-dihydro-1H-quinolin-2-one and 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-3,4-dihydro-1H-quinolin-2-one.

Workup

extractionthe mixture was extracted with ethyl acetate
dry with materialdried over magnesium sulfate
customThe solvent was evaporated under reduced pressure
customthe residue was purified by silica gel column chromatography (dichloromethane:methanol=30:1)

Sources & evidence

ORD record: ord-a457c069cdf847d0a3a2bb92ff308509
Source dataset: uspto-grants-2016_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09260420B2

Reaction notes

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