Cyclocondensation reactions of heterocyclic carbonyl compounds XI . Synthesis and study of cyclocondensation reactions of some 3-substituted-5-(2-aminobenzyl)-1<i>H</i>-[1,2,4]triazine-6-ones
作者:Tomáš Guckýa、Jan Slouka、Iveta Fryšová、Michal Maloň
DOI:10.1002/jhet.5570430314
日期:2006.5
(5) were also obtained by catalytic hydrogenation of corresponding nitroderivatives (4). The cyclization reaction of hydrazides (4) or (5) proceeded to 3,5-disubstituted-1,6-dihydro-[1,2,4]triazine-6-ones (6) or (7). Aminoderivatives (7) were also obtained by reduction of nitro group of compounds (6). The aminoderivatives (7) were then cyclized to 3-substituted-1,5-dihydro-[1,2,4]triazino[6,5-b]quinolines
通过Erlenmeyer与酰基甘氨酸(1a-1i)合成2-硝基苯甲醛,制备了一系列2-取代的4-(2-硝基亚苄基)-4,5-二氢恶唑-5-酮(2a-2i),相应氨基衍生物(3B-3D和3G-3I)通过(催化加氢synthetised 2B-2D和3G-3I)。肼酮(2)和(3)的水合肼解反应得到酰肼(4)和(5)。酰肼(5)也通过相应的硝基衍生物(4)的催化氢化而获得。酰肼的环化反应(4)或(5)进行到3,5-二取代-1,6-二氢-[1,2,4]三嗪-6-一(6)或(7)。还通过还原化合物(6)的硝基获得氨基衍生物(7)。然后将氨基衍生物(7)环化为3-取代的1,5-二氢-[1,2,4]三嗪基[6,5-b]喹啉(9)。其互变异构体(10)。