تفاعل #6758

معادلة التفاعل

citric acid

1-acetyl-4-[(4-ethylthiophenyl)methyl]-3-(β-D-glucopyranosyloxy)-5-methylpyrazole

ethyl chloroformate

→

1-acetyl-3-(6-O-ethoxycarbonyl-β-D-glucopyranosyloxy)-4-[(4-ethylthiophenyl)methyl]-5-methylpyrazole

المذيبات

2,4,6-trimethylpyridine

ظروف التفاعل

المعالجة

1. 1
   workup.STIRRINGthe resulting mixture was stirred at room temperature overnight
2. 2
   ترشيحThe resulting precipitatse were collected by filtration
3. 3
   غسيلwashed with 10% aqueous citric acid solution and water

الإجراء التجريبي

To a solution of 1-acetyl-4-[(4-ethylthiophenyl)methyl]-3-(β-D-glucopyranosyloxy)-5-methylpyrazole (0.03 g) in 2,4,6-trimethylpyridine (0.5 mL) was added ethyl chloroformate (0.012 mL), and the mixture was stirred at room temperature overnight. To the reaction mixture was added 10% aqueous citric acid solution (5 mL), and the resulting mixture was stirred at room temperature overnight. The resulting precipitatse were collected by filtration and washed with 10% aqueous citric acid solution and water to give 1-acetyl-3-(6-O-ethoxycarbonyl-β-D-glucopyranosyloxy)-4-[(4-ethylthiophenyl)methyl]-5-methylpyrazole (0.020 g).

المصدر