Acetone → 9-[(4-fluorophenyl)methyl]-N-[1-(1-methylethyl)-4-piperidinyl]-9H-purin-8-amine

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Reaction Steps

A mixture of 4.9 parts of 9-[(4-fluorophenyl)methyl]-N-(4-piperidinyl)-9H-purin-8-amine, 1 part of a solution of thiopene in methanol 4%. 120 parts of methanol and 8 parts of 2-propanone was hydrogenated at normal pressure and at room temperature with 2 parts of palladium-on-charcoal catalyst 10%. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (90:10 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from acetonitrile, yielding 1.5 parts (27.2%) of 9-[(4-fluorophenyl)methyl]-N-[1-(1-methylethyl)-4-piperidinyl]-9H-purin-8-amine; mp. 185.6° C. (compound 138).

Provenance & Evidence