7-Chloro-5-methylpyrazolo[1,5-a]pyrimidine → 7-[(3-Bromo-2-(2-cyanophenyl)benzofuran-5-yl)methylamino]-5-methylpyrazolo[1,5-a]pyrimidine

Participants

Reaction Steps

A solution of 1.7 g (10.1 mmol) 7-chloro-5-methylpyrazolo[1,5-a]pyrimidine (prepared according to Y. Makisumi, Chem. Pharm. Bull. 1962, 10, 620) and 3.27 g (10.0 mmol) 5-(aminomethyl)-3-bromo-2-(2-cyanophenyl)benzofuran (prepared according to WO 92/09600) in 50 ml dry ethanol was heated with reflux for 5 h. The title compound precipitated upon cooling to room temperature, was filtered with suction, and recrystallized from ethanol to give colorless crystals. yield: 3.5 g (76%), m.p. 210°-215° C.

Provenance & Evidence