Acetonitrile → 1-[4-[3-[4-(1H-Indazol-3-yl)-1-piperidinyl]propoxy]-3-methoxyphenyl]ethanone

Participants

Reaction Steps

A mixture of 3-(4-piperidinyl)-1H-indazole (3.0 g, 15 mmol), K2 CO3 (1.6 g), 1-[4-(3-chloropropoxy)-3-methoxyphenyl]ethanone (5.3 g, 22 mmol), a few crystals of KI and acetonitrile (100 ml) was stirred and refluxed for 16 hours. The reaction was poured into water and a white solid separated from solution. The solid was collected, dried and afforded 5.1 g of product. Recrystallization from ethanol yielded 3.6 g of the compound, which upon chromatography (preparative HPLC on silica gel, eluting with methylene chloride/methanol--9:1) gave 3.0 g (49%) of an off-white solid. Recrystallization from ethanol afforded the analytically pure 1-[4-[3-[4-(1H-indazol-1 3-yl)-1-piperidinyl]-propoxy]-3-methoxyphenyl]ethanone as a white solid, m.p.=171°-173° C.

Provenance & Evidence