[F:1][C:2]1[CH:3]=[C:4]([C:9]#[C:10][Si](C)(C)C)[C:5]([NH2:8])=[N:6][CH:7]=1.CC(C)([O-])C.[K+].[Cl-].[Na+]>CN1CCCC1=O>[F:1][C:2]1[CH:3]=[C:4]2[CH:9]=[CH:10][NH:8][C:5]2=[N:6][CH:7]=1A mixture of 3.80 g of 5-fluoro-3-trimethylsilanylethynylpyrid-2-ylamine and 3.40 g of potassium tert-butoxide in 100 cm3 of 1-methylpyrrolidin-2-one is maintained in the region of 130° C. for about 4 hours. After cooling to a temperature in the region of 20° C., the mixture is poured into 1000 cm3 of saturated aqueous sodium chloride solution and extracted with 5 times 250 cm3 of diethyl oxide. The organic phases are combined, washed with 5 times 100 cm3 of saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered and concentrated to dryness under reduced pressure (13 kPa). 2.35 g of 5-fluoro-1H-pyrrolo[2,3-b]pyridine are obtained in the form of a solid, the characteristics of which are as follows:
Wird geladen…
