Monocyclic 1, 2, 3-triazines were reacted with ketene silyl acetal or silyl enol ether in the presence of 1-chloroethyl chloroformate to give 5-substituted 2-(1-chloroethoxycarbonyl)-2, 5-dihydrotriazines. These dihydro-adducts were readily oxidized and hydrolyzed with ceric ammonium nitrate in CH3CN/H2O to afford 5-substituted triazines.
单环
1,2,3-三嗪与
乙烯酮甲
硅烷基
缩醛或甲
硅烷基烯醇醚在
氯甲酸1-
氯乙酯存在下反应,得到5-取代的2-(1-
氯乙氧基羰基)-2,5-二氢三嗪。这些二氢加合物很容易被
硝酸高
铈铵在CH3CN/
H2O中氧化和
水解,得到5-取代的三嗪。