Réaction #2402

Équation de réaction

ammonium chloride

5-bromo-2-chloropyrimidine

2-{6-amino-5-(4-methylphenyl)pyrimidin-4-yloxy}-ethanol

sodium hydride

→

6-[2-(5-bromopyrimidin-2-yloxy)ethoxy]-5-(4-methylphenyl)pyrimidin-4-amine

Rendement 91.1%

Solvants

tetrahydrofuran

Conditions de réaction

Traitement

1. 1
   Autrethe mixture is evaporated
2. 2
   Autreto remove the solvent
3. 3
   FiltrationThe precipitated crystals are collected by filtration
4. 4
   Lavagewashed
5. 5
   Autredried
6. 6
   AutreThe crude crystals are purified by silica gel column chromatography (solvent; chloroform/methanol=100:1~80:1)
7. 7
   Autrerecrystallized from tetrahydrofuran/diethyl ether

Mode opératoire

To a solution of 2-{6-amino-5-(4-methylphenyl)pyrimidin-4-yloxy}-ethanol (7.54 g) in tetrahydrofuran (150 ml) is added sodium hydride (60% dispersion-type, 1.47 g), and thereto is added 5-bromo-2-chloropyrimidine (7.73 g), and the mixture is stirred at room temperature overnight. To the reaction solution is added saturated aqueous ammonium chloride solution, and the mixture is evaporated to remove the solvent. The precipitated crystals are collected by filtration, washed and dried. The crude crystals are purified by silica gel column chromatography (solvent; chloroform/methanol=100:1~80:1), and recrystallized from tetrahydrofuran/diethyl ether to give 6-[2-(5-bromopyrimidin-2-yloxy)ethoxy]-5-(4-methylphenyl)pyrimidin-4-amine (11.27 g).

Source