Linear-Organic-Polymer-Supported Iridium Complex as a Recyclable Auto-Tandem Catalyst for the Synthesis of Quinazolinones via Selective Hydration/Acceptorless Dehydrogenative Coupling from <i>o</i>-Aminobenzonitriles
作者:Shushu Hao、Jiazhi Yang、Peng Liu、Jing Xu、Chenchen Yang、Feng Li
DOI:10.1021/acs.orglett.1c00475
日期:2021.4.2
coordinative immobilization of [Cp*IrCl2]2 on poly(4-vinylpyridine), was proven to be an efficient heterogeneous autotandem catalyst for synthesizing quinazolinones via selective hydration/acceptorless dehydrogenative coupling from o-aminobenzonitriles. Furthermore, the synthesized catalyst was recycled five times without an obvious decrease in the catalytic activity.
通过将[Cp * IrCl 2 ] 2配位固定在聚(4-乙烯基吡啶)上设计和合成的线性有机聚合物负载的铱络合物Cp * Ir @ P4VP被证明是一种有效的异质串联催化剂通过邻氨基苄腈的选择性水合/无受体脱氢偶联合成喹唑啉酮。此外,将合成的催化剂循环使用五次,而催化活性没有明显降低。
Site‐Selective C–H Amidation of 2‐Aryl Quinazolinones Using Nitrene Surrogates
作者:Saegun Kim、Daeun Jeoung、Kunyoung Kim、Seok Beom Lee、Suk Hun Lee、Min Seo Park、Prithwish Ghosh、Neeraj Kumar Mishra、Suckchang Hong、In Su Kim
DOI:10.1002/ejoc.202001128
日期:2020.12.13
The site‐selectiveC–Hamidation of 2‐aryl quinazolin‐4(3H)‐ones with dioxazolones under rhodium(III) catalysis is described. Gram‐scale reaction, late‐stage C–H functionalization, and synthetic transformations highlight the potential of the developed method.
An efficient and simple VO(acac)2-catalyzed approach to the synthesis of quinazolinones has been developed. Various substituted quinazolinones have been synthesized from 2-aminobenzamides with alcohols or aldehydes in good to excellent yields with molecular oxygen as the oxidant. The process can also be scaled up.
by nature, organic chemists have been using a divergent strategy to improve the synthetic efficiency of diverse molecules. Transition-metal-catalyzed C–H functionalization has become one of the most straightforward, powerful, and atom-economical methods to construct complex scaffolds. However, C–H activation initiated divergent transformation to prepare diverse molecules is still limited. To address
We report the synthesis of C6-substituted isoquinolino[1,2-b]quinazolinones via rhodium(III)-catalyzed C-H annulation with sulfoxonium ylides and evaluation of the cytotoxic activity of the scaffold. This C-H activation approach enables the most straightforward and convergent synthesis of C6-substituted isoquinolino[1,2-b]quinazolines reported to date. This operationally simple method is compatible