Triethylamine → 3-(2,4-Dimethoxybenzylamino)picolinonitrile

HRID 20106

Reaktionsgleichung

[CH3:1][O:2][C:3]1[CH:10]=[C:9]([O:11][CH3:12])[CH:8]=[CH:7][C:4]=1[CH2:5][NH2:6].C(N(CC)CC)C.[C:20]([C:22]1[C:27](F)=[CH:26][CH:25]=[CH:24][N:23]=1)#[N:21]>CN(C)C(=O)C>[CH3:1][O:2][C:3]1[CH:10]=[C:9]([O:11][CH3:12])[CH:8]=[CH:7][C:4]=1[CH2:5][NH:6][C:27]1[C:22]([C:20]#[N:21])=[N:23][CH:24]=[CH:25][CH:26]=1

Komponenten

Reaktionsbedingungen

Temperatur: 80 °C

Versuchsvorschrift

2,4-Dimethoxybenzylamine (3.29 g, 19.7 mmol) and triethylamine (1.99 g, 19.7 mmol) were added sequentially to a solution of 2-cyano-3-fluoropyridine (2.0 g, 16.4 mmol) (Sakamoto et. al., Chem. Pharm. Bull., 1985, 33, 565-71) in N,N-dimethylacetamide (29 mL). The reaction was heated at 80° C. for 4 h, quenched with water and extracted with diethyl ether (3×). The combined organic extracts were washed water, saturated brine, dried over magnesium sulfate and concentrated. The crude product was purified by flash chromatography (silica gel, 0-12% ethyl acetate (with 0.1 triethylamine) in dichloromethane gradient elution) to produce the title compound (3.25 g). MS 270.3 (M+1).

Aufarbeitung

customquenched with water
extractionextracted with diethyl ether (3×)
washThe combined organic extracts were washed water, saturated brine
dry with materialdried over magnesium sulfate
concentrationconcentrated
customThe crude product was purified by flash chromatography (silica gel, 0-12% ethyl acetate (with 0.1 triethylamine) in dichloromethane gradient elution)

Quellen und Nachweise

ORD-Eintrag: ord-eb10cc9be3b049d8b11cf9434a42020e
Quelldatensatz: uspto-grants-2010_06
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07745427B2

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