Ethyl imidazo[1,2-a]pyridine-6-carboxylate → 1-tert-butyl-6-pyridin-4-yl-3-(pyridin-4-ylmethyl)-2H-pyrazolo[3,4-d]pyrimidin-4-one

Participants

Reaction Steps

Following a procedure substantially similar to that described in Example 16, part c, but substituting ethyl isonicotinate for 6-carboethoxyimidazo[1,2-a]pyridine and 1-tert-butyl-3-(4-pyridylmethyl)-5-amino-1H-pyrazole-4-carboxamide for 1-cyclopentyl-3-ethyl-5-amino-1H-pyrazole-4-carboxamide there was obtained 1-tert-butyl-3-(4-pyridylmethyl)-6-(4-pyridyl)-pyrazolo[3,4-d]pyrimidin-4-one in 84% yield as a white powder, m.p. 233°-235° C.

Provenance & Evidence