Hydrochloric Acid → HCID 20042471, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 1-(4-methylbenzyl)piperazine (14 g) in tetrahydrofuran (30 cc) is added in the course of 15 minutes at a temperature in the region of 20° C. to a stirred solution of 3-phenyl-3-(2-pyridyl)propenal (5.4 g) in tetrahydrofuran (150 cc), and the mixture is left with stirring for 8 hours at a temperature in the region of 66° C. After the solution is cooled to a temperature in the region of 20° C., the reaction mixture is evaporated to dryness under reduced pressure (20 mm Hg; 2.7 kPa) at 40° C. The residue obtained is dissolved in ethyl ether (50 cc) and the solution obtained poured onto silica (400 g) contained in a column 4.7 cm in diameter. Elution is performed with a mixture (300 cc) of ethyl ether and petroleum ether (40°-65° C.) (80:20 by volume) and the corresponding eluate is concentrated to dryness under reduced pressure (20 mm Hg; 2.7 kPa) at 40° C. The oil obtained is dissolved in boiling ethyl ether (200 cc). A boiling 2.5N solution (3 cc) of hydrochloric acid in ethyl alcohol is added. After the mixture is cooled to a temperature in the region of 20° C, the precipitate formed is separated by filtration and then recrystallized in boiling ethyl alcohol (400 cc). 3-[4-(4-Methylbenzyl)-1-piperazinyl]-1-phenylindolizine hydrochloride (3.1 g), m.p. 210° C. with decomposition, is thereby obtained.

Provenance & Evidence