作者:D. N. Kozhevnikov、V. N. Kozhevnikov、I. S. Kovalev、V. L. Rusinov、O. N. Chupakhin、G. G. Aleksandrov
DOI:10.1023/a:1019631610505
日期:——
The scope of functionalization of 1,2,4-triazines can be considerably extended via successive nucleophilic substitution of hydrogen (S-N(H)) and ipso-substitution. A convenient procedure has been developed for direct cyanation of 1,2,4-triazine 4-oxides with acetone cyanohydrin in the presence of triethylamine. The cyano group in the resulting 5-cyano-1,2,4-triazines is readily replaced by reactions with various aliphatic alcohols and amines.