HCID 178478164, compound → HCID 178515473, compound

Participants

Reaction Steps

2,3-Dihydro-7-benzyloxy-1H-pyrazolo[1,2-a]indazolium chloride (6 g) obtained in Examples 1 and 2 was dissolved in methanol (100 ml) and catalytically reduced by adding 10% palladium-charcoal (0.6 g) to the solution, to give 3.5 g of 2,3-dihydro-7-hydroxy-1H-pyrazolo[1,2-a]indazolium chloride. After recrystallization from isobutanol, the product had a melting point of 278° to 279° C. (decomposition).

Provenance & Evidence