Synthesis of novel 2-alkoxy(aralkoxy)-4H-[1,2,4]triazolo[1,5-a]quinazolin-5-ones starting with dialkyl-N-cyanoimidocarbonates
作者:Rashad Al-Salahi、Detlef Geffken
DOI:10.1002/jhet.574
日期:2011.5
A novel series of 2‐alkoxy(aralkoxy)‐4H‐[1,2,4]triazolo[1,5‐a]quinazolines were synthesized employing N‐cyanoimidocarbonates and 2‐hydrazinobenzoic acid as building blocks. Chemical transformation of the inherent lactam moiety in the targeted 2‐alkoxy(aralkoxy)[1,2,4]triazolo[1,5‐a]quinazolines was offered access to a variety of derivatives. J. Heterocyclic Chem., (2011).
以N-氰基亚氨基碳酸酯和2-肼基苯甲酸为基础,合成了一系列新型的2-烷氧基(芳烷氧基)-4 H- [1,2,4]三唑并[1,5- a ]喹唑啉。在目标2-烷氧基(芳烷氧基)[1,2,4]三唑并[1,5- a ]喹唑啉中固有的内酰胺部分的化学转化提供了获得各种衍生物的途径。J.杂环化学。(2011)。
Synthesis and Reactivity of [1,2,4]Triazolo-annelated Quinazolines
作者:Rashad A. Al-Salahi
DOI:10.3390/molecules15107016
日期:——
This paper reports the synthesis of phenyl-substituted 2-alkoxy(methylsulfanyl)-1,2,4-triazolo[1,5-a]quinazolines starting from N-cyanoimidocarbonates and substituted hydrazinobenzoic acids as building blocks. Thionation or chlorination of the inherent lactam moiety in the target compounds followed by treatment with multifunctional nucleophiles provided access to a variety of derivatives.
Synthesis of Substituted 2-Amino-6H-1,3-oxazin-6-ones
作者:Haukur Kristinsson、Tammo Winkler、Grety Rihs、Hans Fritz
DOI:10.1002/hlca.19850680510
日期:1985.8.14
Derivatives of the unknown 2-amino-6H-1,3-oxazin-6-one 2 have been synthesized for the first time in two steps and in excellent yields, starting from N-cyanocarbonimidates 3a–c and cyanoacetates. The structures of 2a–c are assigned by NMR-spectroscopic methods and corroborated by an X-ray structure analysis of 2c.
未知的2-氨基-6 H -1,3-恶嗪-6-one 2的衍生物是从N-氰基碳亚氨酸3a - c和氰基乙酸盐开始,以两个步骤并且以优异的收率首次合成的。2a - c的结构通过NMR光谱法确定,并通过2c的X射线结构分析得到证实。
Notiz über die Reaktion von Methylhydrazin mit<i>N</i>-Cyano-azomethinen. Abhängigkeit des Reaktionsverlaufs von der Natur der Abgangsgruppe
作者:Haukur Kristinsson、Tammo Winkler
DOI:10.1002/hlca.19830660416
日期:1983.6.15
The reaction of methylhydrazine with N-cyanoazomethines 1 containing a thioalkyl leaving group yields the 3-amino-1,2,4-triazole derivatives 2, whereas the N-cyanoazomethines 1 containing an alkoxy leaving group give the isomeric 5-amino-1,2,4-triazoles 3. The yields are excellent and the position selectivity is high. The structures of the 1,2,4-triazole derivatives were determined with the aid of