Pyridine → HCID 21404285, compound

Participants

Reaction Steps

0.976 G. of 4'-cyano-4-hydroxy-biphenyl are dissolved in 10 ml. of absolute pyridine and reacted with 0.988 g. of chloroformic acid n-hexyl ester as in Example 1. The 1.675 g. of yellowish, turbid, partially crystallized oil obtained according to the procedure in Example 1 is dissolved in benzene and chromatographed on 80 g.of silica gel. Benzene elutes 1.530 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-hexyl carbonate obtained melts at 87.1°-87.5° and is liquid crystalline (monotrope) upon cooling to 62.7°. UV (EtOH): ε 270 = 26300.

Provenance & Evidence