HCID 21388924, compound → HCID 21401467, compound

Participants

Reaction Steps

5 g (0.0118 mole) of 1,3-bis-(4'-methoxycarbonylphenylmethyl)-2,2-dimethylimidazolidine-4,5-dione, with the addition of 0.01% of titanium as titanium tetraisopropylate, are refluxed for 2 hours in n-butanol. The methanol which forms is distilled off continuously. The colourless crystals which precipitate after the reaction mixture has cooled are collected by suction filtration and recrystallised from n-butanol to yield 4.2 g of colourless crystals with a melting point of 111°-112° C. The IR and NMR spectra confirm the presumed structure.

Provenance & Evidence