The convergent synthesis of ethyl 5-chloro- and 5-amino-3-aryl-1,2,4-triazinecarboxylates 9a-9d and 10a-10d as well as of 5-amino-3-aryl-1,2,4-triazine-6-carboxamides 11a-11d is described. Compounds 9, 10 and 11 are powerful key compounds for cyclization reactions to the novel pyrimido[4,5-e][1,2,4]triazines 13d, 14c, 14d, 15c and 17a, 17d.
乙基5-氯和5-氨基-3-芳基-1,2,4-三嗪羧酸乙酯9a-9d和10a-10d的收敛合成,以及5-氨基-3-芳基-1,2,4-三嗪-6-羧酰胺11a-11d的合成被描述。化合物9、10和11是用于新型嘧啶并[4,5-e][1,2,4]三嗪13d、14c、14d、15c和17a、17d的环化反应的关键化合物。