Parallel synthesis and spectroscopic analysis of a collection of heterocycles based on the diazabenz[e]aceanthrylene core structure
作者:Alan M. Jones、Tomas Lebl、Stephen Patterson、Tanja van Mourik、Herbert A. Früchtl、Douglas Philp、Alexandra M.Z. Slawin、Nicholas J. Westwood
DOI:10.1016/j.tet.2008.10.049
日期:2009.1
A practical strategy for the synthesis of diazabenz[e]aceanthrylene-based heterocycles is reported. The key step in this approach is a microwave-assisted condensation and cyclisation reaction between an anthranilic acid derivative and a 2′-carbomethoxy substituted N-aryl lactam. The scope of the reaction has been explored as a function of both the nature and position of substituents in both components
报道了一种合成基于二氮杂[ e ]乙炔基杂环的实用策略。该方法的关键步骤是邻氨基苯甲酸衍生物与2'-羰甲氧基取代的N-芳基内酰胺之间的微波辅助缩合和环化反应。已经根据两种组分中取代基的性质和位置以及内酰胺环尺寸的变化来探索反应的范围。使用NMR,X射线晶体学和计算技术描述并探索了整个化合物集合中观察到的有趣的结构和光谱变化。
Asymmetric Catalytic Oxidative Cleavage of Polycyclic Systems: The Synthesis of Atropisomeric Diazonanes and Diazecanes
作者:Alan M. Jones、Gu Liu、Magali M. Lorion、Stephen Patterson、Tomas Lebl、Alexandra M. Z. Slawin、Nicholas J. Westwood
DOI:10.1002/chem.201003188
日期:2011.5.9
internal double bonds in polycyclic systems can give access to compounds containing medium‐ to large‐sized rings. In this example, the nine‐ and ten‐membered ring containing compounds that resulted from the mCPBA‐mediated (mCPBA=meta‐chloroperoxybenzoic acid) oxidative cleavage reaction were shown to exhibit atropisomerism. The reaction of the polycyclic system with catalytic amounts of ruthenium tetraoxide
A novel method for electrochemical lactonization via C(sp3)–H functionalization was developed. This metal- and oxidant-free strategy enabled the efficient synthesis of various lactones. Gram-scale reaction and derivatization of the lactone product demonstrated the synthetic utility of this methodology. Mechanistic studies using control experiments and CV curves elucidated the proposed intramolecular
开发了一种通过 C( sp 3 )–H 官能化进行电化学内酯化的新方法。这种不含金属和氧化剂的策略能够有效合成各种内酯。内酯产物的克级反应和衍生化证明了该方法的合成效用。使用对照实验和 CV 曲线进行的机理研究阐明了所提出的分子内 HAT 和氧化环化途径。通过这种电化学方法实现了不寻常的肖诺型氧化,无需传统的亲核加成过程。