Thionicotinamide → 4-(2-Hydroxyphenyl)-2-(3-pyridyl)thiazole

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

o-(Bromoacetyl)phenyl acetate (2.57 g, 10 mmol) in dry acetone (30 mL) was treated with thionicotinamide (1.38 g, 10 mmol). The mixture was refluxed 16 hours, cooled to about 20° C. at which point a precipitate formed (2.46 g). The precipitate was filtered and dried in vacuo. The precipitate was dissolved in MeOH (50 mL) and treated with 10% NaOH in H2O (20 mL) for 1 hour at about 20° C. to hydrolyze the acetate ester. The pH was adjusted to neutrality with 6N HCl while chilling on ice/H2O and the volume was reduced to about 35 mL in vacuo. After cooling to about 4° C., an orange solid precipitate formed, which was removed by filtration and dried in vacuo to constant mass to yield 36-50% product (LSIMS m/s 254 (MH+)).

Herkunft & Nachweise