Réaction #336663

Équation de réaction

6-hydroxynicotinic acid

H2SO4

MeOH

→

methyl 6-hydroxynicotinate

Conditions de réaction

Traitement

1. 1
   TempératureThe mixture was refluxed for 10 hours
2. 2
   TempératureAfter cooling
3. 3
   workup.DISTILLATIONMeOH was distilled off
4. 4
   FiltrationThe precipitate was collected by filtration
5. 5
   Lavagerinsed (twice) with water
6. 6
   Autredried

Mode opératoire

In 70 ml of MeOH was suspended 12.0 g (0.086 mole) of 6-hydroxynicotinic acid followed by addition of 4 ml of concentrated H2SO4. The mixture was refluxed for 10 hours. After cooling, MeOH was distilled off and the residue was adjusted to pH about 8 with a saturated aqueous solution of sodium hydrogen carbonate. The precipitate was collected by filtration, rinsed (twice) with water and dried to give 10.5 g of methyl 6-hydroxynicotinate as pale yellow crystals. This product was in the pyridone structure.

Source