Reaktion #1949500

Reaktionsgleichung

3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine

compound 7-7

3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine

sodium carbonate

benzyl alcohol

→

3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(benzyloxycarbonyl)methoxypyridine

Ausbeute 34.8%

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturunder reflux for 2 hours
2. 2
   TemperaturIt was cooled to room temperature
3. 3
   workup.DISTILLATIONthe solvent was distilled off under reduced pressure

Vorschrift

A mixture of 0.60 g of 3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine [present compound 7-7], 0.13 g of sodium carbonate, 0.39 g of benzyl alcohol and 2.4 ml of toluene was heated at 90° C. for 2 hours, then under reflux for 2 hours. It was cooled to room temperature, then, the solvent was distilled off under reduced pressure, and the resulted residue was subjected to silica gel chromatography to obtain 0.24 g of 3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]phenoxy}-2-(benzyloxycarbonyl)methoxypyridine [present compound 7-82].

Quelle