T. Itoh et al., THE SYNTHESIS OF 5-SUBSTITUTED 1,2,3-TRIAZINES WITH KETENE SILYL ACETALS AND CERIC AMMONIUM-NITRATE, Chemical and Pharmaceutical Bulletin, 43(5), 1995, pp. 881-883
Monocyclic 1,2,3-triazines were reacted with ketene silyl acetal or si
lyl enol ether in the presence of 1-chloroethyl chloroformate to give
5-substituted 2-(1-chloroethoxycarbonyl)-2,5-dihydrotriazines. These d
ihydro-adducts were readily oxidized and hydrolyzed with eerie ammoniu
m nitrate in CH3CN/H2O to afford 5-substituted triazines.