p-Toluenesulfonic acid monohydrate → HCID 67707055, compound

Participants

Reaction Steps

A mixture of 5-[2-[4-[1-hydroxy-3-(5-methyl-2-phenyl-4-oxazolyl)propyl]phenyl]ethyl]-2,4-oxazolidinedione (0.32 g), p-toluenesulfonic acid monohydrate (p-TsOH.H2O) (0.145 g) and toluene (40 ml) was stirred under refluxing conditions for 2 hours. The reaction mixture was washed with an aqueous solution of sodium hydrogen carbonate and water, dried (MgSO4) and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography. From the fraction eluted with chloroform-methanol (100:2), 5-[2-[4-[3-(5-methyl-2-phenyl-4-oxazolyl)-1-propenyl]phenyl]ethyl]-2,4-oxazolidinedione (0.235 g, 77%) was obtained, which was then recrystallized from dichloromethane-isopropyl ether to yield colorless needles having a melting point of 175°-176° C.

Provenance & Evidence