2-(4-butyl-phenyl)-4-chloro-pyrimidine-5-carbonitrile 在
锌 作用下,
以
1,4-二氧六环 为溶剂,
以There is obtained 5-cyano-2-(4-n-butylphenyl)-pyrimidine as colorless crystals of melting point 108.6°-109.5° C., which的产率得到2-(4-butyl-phenyl)-pyrimidine-5-carbonitrile
Phenyl-pyrimidines of the formula ##STR1## wherein R.sub.1 and R.sub.2 are as hereinafter set forth, are described. The end products are useful as liquid crystals.