Reaktion #40543

Reaktionsgleichung

HCl

methyl 4-amino-3-[(3-oxo-6-pyridin-4-yl-2,3-dihydropyridazine-4-carbonyl)amino]benzoate

tetrahydrofuran

lithium hydroxide

→

2-(3-Oxo-6-pyridin-4-yl-2,3-dihydropyridazin-4-yl)-1H-benzimidazole-5-carboxylic acid

Lösungsmittel

methanol

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter cooling to room temperature
2. 2
   Filtrationis filtered off with suction
3. 3
   Waschenwashed with water
4. 4
   Sonstigedried in vacuo

Vorschrift

A mixture consisting of 500 mg of methyl 4-amino-3-[(3-oxo-6-pyridin-4-yl-2,3-dihydropyridazine-4-carbonyl)amino]benzoate, 6 ml of tetrahydrofuran (THF), 6 ml of methanol, 6 ml of water and 173 mg of lithium hydroxide is stirred at 50° C. for 5 hours. After cooling to room temperature, the pH is adjusted to 4-5 with 1N HCl, whereupon a precipitate separates out and is filtered off with suction and then washed with water and dried in vacuo.

Quelle