反应详情

1,3-bis[4-(N-hydroxyaminomethyl)phenoxy]benzene (1.76 g) was dissolved in 35 ml of tetrahydrofuran to which, with ice-cooling and in an atmosphere of argon, was subsequently added dropwise 1.65 g of n-butoxycarbonyl isocyanate. After 30 minutes of stirring at the same temperature, 1N sodium hydroxide aqueous solution was added dropwise thereto and the stirring was continued for 30 minutes at room temperature. After adding 1N hydrochloric acid, the solvent was evaporated, and the resulting residue was subjected to silica gel column chromatography to obtain 1.0 g of 1,3-bis[4-[(3,5-dioxo-1,2,4-oxadiazolidin-2-yl)methyl]phenoxy]benzene from fractions of chloroform-methanol (30:1) elution.

1. temperaturecooling and in an atmosphere of argon
2. additionwas added dropwise
3. customthe solvent was evaporated