Dimethylformamide → HCID 19046983, Verbindung

Temperatur

-78 °C

2.55 ml (18.2mmol) of diisopropylamine in 30 ml of tetrahydrofuran are stirred at 0° C. with 11.4 ml (18.2mmol) of a 1.6-molar n-butyllithium solution in hexane for one hour. After addition of 170 ml of tetrahydrofuran and cooling to -78° C., 3.64 g (12.1 mmol) of 2-fluoro-6-(4-octyloxyphenyl)pyridine (prepared as described in EXAMPLE 2) in 90 ml of tetrahydrofuran are added dropwise, and the mixture is stirred at -78° C. for 4 hours. 1.86 ml (24.2mmol) of N,N-dimethylformamide are then added dropwise at -78° C., and the reaction mixture is stirred overnight, during which it warms to room temperature. For workup, the mixture is poured onto sodium chloride solution, the resulting mixture is extracted with ether, the organic phase is washed with water, dried over sodium sulfate, filtered and concentrated. Purification of the residue by chromatography (silica gel, CH2Cl2) gives 2.20 g of 2-fluoro-3-formyl-6-(4-octyloxyphenyl)pyridine. ##STR62##

1. stirringthe reaction mixture is stirred overnight, during which it
2. customwarms to room temperature
3. additionFor workup, the mixture is poured onto sodium chloride solution
4. extractionthe resulting mixture is extracted with ether
5. washthe organic phase is washed with water
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated
9. customPurification of the residue by chromatography (silica gel, CH2Cl2)

ORD-Eintrag

ord-1cea35c9548d4858ac7ecb960e0909af

Quelldatensatz

uspto-grants-1997_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05630962