Ar-C(CN)=NN=C(CN)-Ar and Ar-C(CN)=NNHCO-Ar′, easily prepared from the bromoderivatives Ar-CBr(SEt)-CN, afford in good yields, by heating in a basic medium, 3,6-diaryl-5 hydroxy-1,2,4-triazines.
由
溴代衍
生物Ar-CBr(
SEt)-CN容易制备的Ar-C(CN)= N = N = C(CN)-Ar和Ar-C(CN)= N = NH = CO-Ar'通过在碱性介质中加热3,6-二芳基-5羟基-
1,2,4-三嗪可得到良好的收率。