反应详情

0.976 G. of 4'-cyano-4-hydroxy-biphenyl are dissolved in 10 ml. of absolute pyridine and reacted with 1.24 g. of chloroformic acid n-nonyl ester as in Example 1. The 2.026 g. of yellowish, turbid oil obtained according to the procedure described in Example 1 is dissolved in benzene and chromatographed on 90 g. of silica gel. Benzene elutes 1.646 g. of colorless crystals which are recrystallized from ether-hexane up to constant melting point and clearing point. The pure 4'-cyano-4-biphenylyl n-nonyl carbonate obtained melts at 53.0°-53.1° and has a clearing point of 70.0°. The compound is smectic up to 68.1°. UV (EtOH): ε 271 = 26600.

1. customof yellowish, turbid oil obtained
2. customchromatographed on 90 g
3. customof colorless crystals which are recrystallized from ether-hexane up to constant melting point and clearing point