Ethanol → HCID 178433712, compound

Participants

Reaction Steps

A mixture of 1-(3-cyanophenylmethyl)-3-methyl-6-(4-pyridyl)-pyrazolo[3,4-d]pyrimidin-4-one (3.4 g, 10.2 mmol), 10M NaOH (100 ml) and ethanol (100 ml) was refluxed for 7 hours. The mixture was filtered hot, the filtrate was cooled in an ice-bath for 30 minutes and neutralized with acetic acid. The product was collected by filtration and washed with water, ethanol and ether. The solid residue was digested in methanol and the product was collected by filtration and washed with ether. The product was recrystallized from DMF to afford 0.91 g (25%) of 1-(3-carboxyphenylmethyl)-3-methyl-6-(4-pyridyl)-pyrazolo[3,4-d]pyrimidin-4-one as an off-white powder, m.p. >300° C. when dried at 125° C. for 18 hours in high vacuum.

Provenance & Evidence