Ammonium Chloride → HCID 14391477, compound

Participants

Reaction Steps

To a suspension of magnesium turnings (1.0 g, 0.04 mole) in 25 ml tetrahydrofuran (THF) and 10 ml ether, was added a few drops of a solution of 2-bromo-1-(2-fluorobenzyl) pyrrole (10.0 g, 0.04 mole) in 30 ml THF. The reaction was initiated with a few drops of dibromoethane and heat, and reflux was maintained by the addition of the bromo compound after stirring at reflux for 30 minutes, the mixture was cooled with an ice-bath; then a solution of 1-(4-chlorophenethyl)-4-piperidone (5.0 g, 0.021 mole) was added. After stirring at ambient temperature for one hour, the mixture was poured into a solution of NH4Cl, then extracted with ether. The ether solution was washed with water, then dried over anhydrous MgSO4. After evaporation of the solvent, the resultant oil, 12 g, was purified by high pressure liquid chromatography (HPLC), using ethyl acetate as the eluent to give 4.5 g of 1-(4-chlorophenethyl)-4-[1-(2 -fluorobenzyl) pyrrol-2-yl]-4-piperidinol, m.p. 108°-9° C.

Provenance & Evidence