Nitric Acid → HCID 178433429, compound

Participants

Reaction Steps

In a 500 ml single-necked round-bottomed flask, 230 ml of a 65% ageous HNO3 solution is added and stirred under cooling (ice/water cooling bath). 7.00 g of 3-bromo-6-methyl-pyridin-2-ol 2 at ambient temperature is introduced portion-wise. Stirring is continued for 3.5 hours at ambient temperature. After pouring the mixture into 200 ml of an ice/water mixture (pH 1), the water phase is extracted with AcOEt. The organic phase is washed twice with water brought to pH 4 by adding ageous NaOH solution (pH meter), then dried over sodium sulfate, filtered and concentrated in vacuo to give 7.52 g of a yellow solid. This crude material is suspended in diethyl ether and stirred for 1 hour at ambient temperature, filtered, washed with the same solvent and dried to give 3.89 g of the compound as a yellow-orange solid (m.p. >220° C.).

Provenance & Evidence