Dimethylformamide → 4-(4-Methyl-pyridin-2-yloxymethyl)-benzaldehyde

HRID 640180

Reaktionsgleichung

[O:1]1CCC[CH2:2]1.Br[C:7]1[CH:21]=[CH:20][C:10]([CH2:11][O:12][C:13]2[CH:18]=[C:17]([CH3:19])[CH:16]=[CH:15][N:14]=2)=[CH:9][CH:8]=1.C([Li])CCC.CN(C)C=O>O>[CH3:19][C:17]1[CH:16]=[CH:15][N:14]=[C:13]([O:12][CH2:11][C:10]2[CH:20]=[CH:21][C:7]([CH:2]=[O:1])=[CH:8][CH:9]=2)[CH:18]=1

Komponenten

Reaktionsbedingungen

Temperatur: -78 °C

Versuchsvorschrift

To a tetrahydrofuran (150 mL) solution of 2-(4-bromo-benzyloxy)-4-methyl-pyridine (5.70 g, 20.5 mmol) described in Manufacturing Example 43-1-1 was added dropwise n-butyl lithium (2.67 M n-hexane solution, 9.21 mL, 24.6 mmol) on a dry ice-ethanol bath (−78° C.) under nitrogen atmosphere, which was stirred for 20 minutes at −78° C. N,N-dimethylformamide (3.16 mL, 41.0 mmol) was then added dropwise thereto and stirred for 10 minutes at −78° C. The reaction solution was allowed to room temperature, water was added, and the solution was extracted with ethyl acetate. The organic layer was separated and washed with saturated aqueous sodium chloride, and the solvent was evaporated under a reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:heptane=1:3) to obtain the title compound (2.58 g, 55.4%).

Aufarbeitung

stirringstirred for 10 minutes at −78° C
customwas allowed to room temperature
extractionthe solution was extracted with ethyl acetate
customThe organic layer was separated
washwashed with saturated aqueous sodium chloride
customthe solvent was evaporated under a reduced pressure
customThe residue was purified by silica gel column chromatography (ethyl acetate:heptane=1:3)

Quellen und Nachweise

ORD-Eintrag: ord-88d5c0faf7784eff80fe53e639f72f18
Quelldatensatz: uspto-grants-2010_04
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07691882B2

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