| 摘要 |
PURPOSE:To prepare the subject compound in high purity and yield while inhibiting the by-production of azo components by charging hydrogen gas and simultaneously adding a bis(3-nitrophenoxy)compound into a reactor into which a reaction solvent and a catalyst are preliminarily charged. CONSTITUTION:When a compound of formula I [X is 1-10C divalent hydrocarbon group, C(CF3)2, CO, S, SO, SO2, O, single bond] is catalytically reduced, a reaction solvent and a hydrogenation catalyst are preliminarily charged to a reactor and a raw material compound of formula I is added into the reactor as a rate corresponding to the reaction rate with stirring, while the concentrations of nitroso compounds and hydroxylamine are controlled in low states to inhibit the by-production of azo compounds, thereby providing compound of formula II in good purity and high yield. The compound of formula II is important as a monomer for heat-resistant polymers, especially as a raw material for polyamides, polyimides, polyamideimides, etc. |
