1,2,4-Triazine chemistry. 11. Dihydro-1,2,4-triazines: structural studies on sodium borohydride reduction products from some 3-methylthio- and 3-methoxy-1,2,4-triazines
Intramolecular Inverse Electron Demand Diels–Alder Reactions of Tryptamine with Tethered Heteroaromatic Azadienes
作者:Scott C. Benson、Lily Lee、Lydie Yang、John K. Snyder
DOI:10.1016/s0040-4020(00)00003-x
日期:2000.2
1,2,4,5-Tetrazines and 1,2,4-triazines tethered to tryptamine via the ethylamine side chain undergo intramolecularinverseelectrondemand cycloadditions to produce adducts with the [ABazaCE]-ring skeleton of the Aspidosperma alkaloids.
Amino acids in the synthesis of heterocyclic systems. Synthesis of γ-(5-(1,2,4-Triazinylidene))-α,β-dehydro-α-amino acid derivatives and 6<i>H</i>-pyrido[1,2-<i>d</i>][1,2,4]triazin-6-ones
作者:Branko Stanovnik、Miha Tišler、Anton Čopar
DOI:10.1002/jhet.5570320208
日期:1995.3
with 5(4H)-oxazolones 4 in acetic anhydride to give acetylated products 5, while in toluene-acetic acid mixture nonacetylated products 9 are formed. Both types of products were isolated as (E,Z) mixtures. Compounds 5 and 9 rearrange into 6H-pyrido[1,2-d]-[1,2,4]triazin-6-ones 12 by heating in formic acid or in xylene, respectively. Compounds 5 are transformed in the presence of nucleophiles, such as
5-(1,2,4-三嗪基)取代的烯胺3与5(4反应ħ)-oxazolones 4在乙酸酐,得到乙酰化产物5,而在甲苯-乙酸混合物非乙酰化产物9而形成。两种类型的产物均以(E,Z)混合物的形式分离出来。通过在甲酸或二甲苯中加热,化合物5和9分别重排成6 H-吡啶并[1,2- d ]-[1,2,4]三嗪-6-酮12。化合物5在亲核试剂(如醇钠或酰胺钠)存在下通过阴离子形式转化10转化为相应的存在于2-(Z),4-(Z)中的α-氨基-2-丁烯酸的γ-(5-(1,2,4-三叠氮基))取代的衍生物的酯13和酰胺14形式。
Oki, Masaharu; Shimada, Sadakatsu, Chemical and pharmaceutical bulletin, 1987, vol. 35, # 12, p. 4705 - 4710
作者:Oki, Masaharu、Shimada, Sadakatsu
DOI:——
日期:——
SASAKI TADASHI; MINAMOTO KATSUMARO; HARADA KATSUHIKO, J. ORG. CHEM., 1980, 45, NO 23, 4594-4597