Pyridine → HCID 21404277, compound

Participants

Reaction Steps

0.390 G. of 4'-cyano-4-hydroxy-biphenyl are dissolved in 4.0 ml. of absolute pyridine and reacted with 0.293 g. of chloroformic acid n-propyl ester as in Example 1. The 0.546 g. of brownish crystals obtained according to the procedure described in Example 1 are dissolved in benzene and chromatographed on 40 g. of silica gel. Benzene elutes 0.528 g. of yellowish crystals which are recrystallized from ether-hexane up to constant melting point and clearing point. The pure 4'-cyano-4-biphenylyl n-propyl carbonate obtained melts at 70.2°-70.9° and is liquid crystalline (monotrope) upon cooling to 68.2°. UV (EtOH): ε270 = 26,000.

Provenance & Evidence