反应详情

温度

-15 °C

In 4 ml of tetrahydrofuran, 0.47 g of 2-[6-chloro-2-methyl-8-oxo-9-(4-isopropyl-2-methylthiophenyl)-8,9-dihydropurin-7-yl]acetic acid was dissolved. After the reaction mixture was cooled to −15° C., 0.14 g of N-methylmorpholine and 0.19 g of isobutyl chloroformate was added thereto. After the reaction solution was stirred for 5 minutes, 0.085 ml of 28% aqueous ammonia was added thereto. The reaction mixture was warmed up to room temperature and was subsequently stirred overnight. Water was poured into the reaction mixture. The reaction mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate. After the desiccant was filtered off, the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: chloroform-methanol=50:1) to yield 0.41 g of 2-[6-chloro-2-methyl-8-oxo-9-(4-isopropyl-2-methylthiophenyl)-8,9-dihydropurin-7-yl]acetamide as an oil.

1. temperatureThe reaction mixture was warmed up to room temperature
2. waitwas subsequently stirred overnight
3. extractionThe reaction mixture was extracted with ethyl acetate
4. dry with materialThe extract was dried over anhydrous sodium sulfate
5. filtrationAfter the desiccant was filtered off
6. concentrationthe filtrate was concentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (eluent: chloroform-methanol=50:1)