Studies in the triazine series including a new synthesis of 1:2:4-triazines
作者:P.V. Laakso、R. Robinson、H.P. Vandrewala
DOI:10.1016/0040-4020(57)85014-5
日期:1957.1
mono-aroylhydrazones of benzil are cyclised by ammoniumacetate in hot aceticacid to tri-substituted-1:2:4-triazines. The yield is favourable and it is not necessary, or even advantageous, to isolate the presumed intermediates. The new synthesis has been applied to a sufficient range of examples to establish its status as a general method. In the case of phenanthraquinone the reaction took a more complex course and
Palladium-catalyzed cross-coupling of 5-acyl and 5-formyl-1,2,4-triazines and their derivatives with heteroaromatic tin compounds
作者:Danuta Branowska、Ewa Olender、Andrzej Rykowski
DOI:10.1016/j.tet.2014.04.094
日期:2014.8
mono- and di(substituted)-1,2,4-triazine derivatives containing thiophene and furan rings are described. Heteroaromatic rings were provided using palladium-catalyzedcross-coupling reaction between 3-alkylsulfanyl-5-acyl-1,2,4-triazines or 5-cyano-3-alkylsulfanyl-1,2,4-triazines and heteroaromatic tin compounds. New compounds bearing masked acyl groups were also obtained. These reactions were optimized