Sodium hydride → 1-{2-[3-(benzyloxy)propoxy]ethyl}-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinoline

HRID 433979Notes

Reaction equation

[CH2:1]([O:3][CH2:4][C:5]1[N:6]([CH2:18][CH2:19][OH:20])[C:7]2[C:16]3[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=3[N:10]=[CH:9][C:8]=2[N:17]=1)[CH3:2].[H-].[Na+].Br[CH2:24][CH2:25][CH2:26][O:27][CH2:28][C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1>CN(C)C=O>[CH2:28]([O:27][CH2:26][CH2:25][CH2:24][O:20][CH2:19][CH2:18][N:6]1[C:7]2[C:16]3[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=3[N:10]=[CH:9][C:8]=2[N:17]=[C:5]1[CH2:4][O:3][CH2:1][CH3:2])[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A solution of 2-[2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]ethanol (1.0 g, 3.7 mmol) in N,N-dimethylformamide was added dropwise to a suspension of sodium hydride (0.19 g of a 60% dispersion in mineral oil, 4.8 mmol) in N,N-dimethylformamide (20 ml). The reaction was maintained for 2 hours followed by the dropwise addition of benzyl 3-bromopropyl ether (0.72 ml, 4.1 mmol). The reaction was stirred overnight at 100° C., quenched by pouring over ice, and extracted with ethyl acetate. The organic fractions were washed with water, dried (MgSO4), filtered, and concentrated. The crude product was purified by flash column chromatography (silica gel, 4:1 ethyl acetate/hexanes) to provide 0.45 g of 1-{2-[3-(benzyloxy)propoxy]ethyl}-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinoline as a brown oil.

Workup

temperatureThe reaction was maintained for 2 hours
customquenched
additionby pouring over ice
extractionextracted with ethyl acetate
washThe organic fractions were washed with water
dry with materialdried (MgSO4)
filtrationfiltered
concentrationconcentrated
customThe crude product was purified by flash column chromatography (silica gel, 4:1 ethyl acetate/hexanes)

Sources & evidence

ORD record: ord-6460183fea9a4c44a81430cb14dfdb51
Source dataset: uspto-grants-2003_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06670372B2

Reaction notes

Loading…