描述了一种有效的三氟乙酸介导的 1,2,3-benzotriazin-4(3 H )-ones 的脱氮羟基化。这种不含金属的方法与多种 1,2,3-benzotriazin-4(3 H )-one相容,可在较短的反应时间内以良好至高产率提供邻羟基化苯甲酰胺。据信该反应通过苯重氮中间体进行。该反应的合成效用通过以良好收率制备抗微生物药物利肝素 C 和苯并恶嗪-2,4(3 H )-二酮类化合物得到成功证明。
作者:Rochelle McGrory、Réka J. Faggyas、Andrew Sutherland
DOI:10.1039/d1ob00968k
日期:——
A mild and effective one-pot synthesis of 1,2,3-benzotriazin-4(3H)-ones and benzothiatriazine-1,1(2H)-dioxide analogues has been developed. The method involves the diazotisation and subsequent cyclisation of 2-aminobenzamides and 2-aminobenzenesulfonamides via stable diazonium salts, prepared using a polymer-supported nitrite reagent and p-tosic acid. The transformation was compatible with a wide range
开发了一种温和有效的一锅法合成 1,2,3-benzotriazin-4(3 H )-ones 和 benzothiatriazine-1,1( 2H )-dioxide 类似物。该方法涉及通过使用聚合物负载的亚硝酸盐试剂和对甲苯磺酸制备的稳定的重氮盐对 2-氨基苯甲酰胺和 2-氨基苯磺酰胺进行重氮化和随后的环化。该转化与多种芳基官能团和酰胺/磺酰胺取代基相容,可用于合成药学上重要的靶标。通过制备含有 1,2,3-benzotriazin-4(3 H )-one的 α-氨基酸,进一步证明了一锅重氮环化过程的合成效用。
A15N NMR investigation of a series of benzotriazinones and related antitumour heterocycles
作者:Keith Vaughan、Derry E. V. Wilman、Richard T. Wheelhouse、Malcolm F. G. Stevens
DOI:10.1002/mrc.994
日期:2002.4
A series of 3‐substituted 1,2,3‐benzotriazin‐4‐ones, 1 and 2, were synthesized by standard methods and the 15N NMR spectra were recorded. All spectra were obtained using the natural abundance of the nitrogen‐15 isotope. The chemical shifts appear in the normal range for N‐1, N‐2 and N‐3 of the triazine ring, and also correlate with the chemical shifts in the spectra of the imidazolotriazinone, 4, and
1,2,3-Benzotriazin-4(3H)-ones react with 1,3-dienes in the presence of a nickel(0)/phosphine complex to give a variety of 3,4-dihydroisoquinolin-1(2H)-ones. Oxidative insertion of nickel(0) into the triazinone moiety prompts extrusion of dinitrogen to give a five-membered ring azanickelacyclic intermediate. Subsequent insertion of 1,3-dienes into the nickel−carbon bond followed by allylic amidation
作者:A. J. Boulton、Purabi Devi、Neil Henderson、Adil A. Jarrar、Mikl�s Kiss
DOI:10.1039/p19890000543
日期:——
3-Substituted 1,2,3-benzotriazin-4(3H)-one 1-oxides are formed on peracid oxidation of 3-alkyl- and 3-methoxy-1,2,3-benzotriazin-4(3H)-ones. The 3-(α-alkoxyalkyl) 1-oxide derivatives could be dealkylated to the tautomeric 3-unsubstituted compound. The acidities of the isomeric N-oxides of the 1,2,3-benzotriazinone system are compared. Phenyl iodosodiacetate converts o-nitrobenzaldehyde benzyl- and