反应详情

A mixture of 5.9 g. of p-aminobenzonitrile and 10.9 g. of p-n-octylbenzaldehyde in 100 ml. of benzene is treated with 150 ml. of p-toluenesulfonic acid and reacted as described in Example 1. After evaporation, there remain 16.5 g. of a yellow oil which crystallizes with cooling. Purification is carried out by several recrystallizations from isopropanol as described in Example 1. The p-[(p-n-octylbenzyliden)amino]benzonitrile which is obtained has a melting point of 32.5°-32.8° C. and a clearing point of 68.8° C. Up to 54.4° C. the compound is smectic. UV (ethanol): ε280 = 24200 (shoulder at 312 nm). The nuclear magnetic resonance, mass spectrum, infrared and microanalysis data confirm the structure.

1. additionA mixture of 5.9 g
2. customAfter evaporation, there
3. customof a yellow oil which crystallizes
4. temperaturewith cooling
5. customPurification
6. customis carried out by several recrystallizations from isopropanol