4-chloro-2-(4-heptyl-phenyl)-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-heptylphenyl)-pyrimidine having a melting point of 96.3° C. (smectic)的产率得到5-Cyan-2-(4-heptylphenyl)-pyrimidin
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.