Sodium Hydroxide → HCID 56610792, compound

[step 2] 2-Methoxy-N-(2-methoxy-6-nitrophenyl)acetamide (5.4 g, 22.5 mmol) obtained in step 1 was dissolved in ethanol (45 mL), tin (II) chloride.2 hydrate (24.4 g, 108 mmol) was added, and the mixture was stirred with heating under reflux for 1 hr. After cooling to room temperature, 4 mol/L aqueous sodium hydroxide solution was added to the mixture. The mixture was filtered through celite, and the solution was extracted 3 times with ethyl acetate. The combined organic layers were dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained brown oil (3.7 g) was suspended in diisopropyl ether (30 mL) and isopropyl alcohol (3 mL), and stirred at room temperature for 1 hr. The suspension was suction filtered, and the obtained solid was dried under reduced pressure to give 4-methoxy-2-(methoxymethyl)-1H-benzo[d]imidazole (1.38 g, 32%).

1. temperaturewith heating
2. temperatureunder reflux for 1 hr
3. filtrationThe mixture was filtered through celite
4. extractionthe solution was extracted 3 times with ethyl acetate
5. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. stirringisopropyl alcohol (3 mL), and stirred at room temperature for 1 hr
8. filtrationsuction filtered
9. customthe obtained solid was dried under reduced pressure

ORD record

ord-ce86a6393888457b9dea5130c51239a3

Source dataset

uspto-grants-2015_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08969345B2