Acetyl chloride → HCID 136087647, compound

Participants

Reaction Steps

To a solution of 6.5 g of the compound of Example 1 in 50 ml of chloroform and 2.4 g of triethylamine is added dropwise 1.9 g of acetyl chloride over 15 minutes under cooling and stirring. After addition, the resulting mixture is stirred under cooling for 2 hours and then at room temperature for 3 hours. The reaction solution is washed with water, dried and then concentrated. The obtained residue is recrystallized from ethanol to give 5.7 g of 1-acetyl-3-(3,5-di-tertiary butyl-4-hydroxyphenyl)-1H-pyrazolo[3,4-b]pyridine as oale yellow crvstals. melting at 169°-171° C.

Provenance & Evidence