HCID 21388924、化合物 → HCID 21401467、化合物

反応式

[CH3:1][O:2][C:3]([C:5]1[CH:10]=[CH:9][C:8]([CH2:11][N:12]2[C:16](=[O:17])[C:15](=[O:18])[N:14]([CH2:19][C:20]3[CH:25]=[CH:24][C:23]([C:26]([O:28][CH3:29])=[O:27])=[CH:22][CH:21]=3)[C:13]2([CH3:31])[CH3:30])=[CH:7][CH:6]=1)=[O:4]>C(O)CCC.[Ti].CC([O-])C.CC([O-])C.CC([O-])C.CC([O-])C.[Ti+4]>[CH2:29]([O:28][C:26]([C:23]1[CH:24]=[CH:25][C:20]([CH2:19][N:14]2[C:15](=[O:18])[C:16](=[O:17])[N:12]([CH2:11][C:8]3[CH:9]=[CH:10][C:5]([C:3]([O:2][CH2:1][CH2:7][CH2:8][CH3:9])=[O:4])=[CH:6][CH:7]=3)[C:13]2([CH3:31])[CH3:30])=[CH:21][CH:22]=1)=[O:27])[CH2:3][CH2:5][CH3:6]

参加物

実験手順

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.