Eco-friendly reactions in PEG-400: a highly efficient and green approach for stereoselective access to multisubstituted 3,4-dihydro-2(1<i>H</i>)-quinazolines using 2-aminobenzylamines
作者:Nutan Sharma、Pankaj Sharma、Sunita Bhagat
DOI:10.1039/c7ra13487h
日期:——
An efficient and stereoselective synthesis of novel 3,4-dihydro-2(1H)-quinazolines has been developed throughcyclization reactions of 2-aminobenzylamines with α-oxoketene dithioacetals using PEG-400 as an inexpensive, easy to handle, non-toxic and recyclable reaction medium. The developed protocol is operationally simple and tolerates various substrates having different functionalities. This protocol
通过 2-氨基苄胺与 α-氧代烯酮二硫缩醛的环化反应,使用 PEG-400 作为一种廉价、易于处理、无毒的化合物,开发了新型 3,4-二氢-2( 1 H )-喹唑啉的高效立体选择性合成方法。和可回收的反应介质。所开发的协议操作简单,并且可以容忍具有不同功能的各种基材。该方案具有多种属性,例如优异的产率、无需后处理、绿色反应条件以及对环境无害。这种新策略的吸引人的特点是,所有报道的最终化合物都被分离为单一(E)-立体异构形式,这已通过1 HNMR 和 X 射线晶体学研究得到证实。
Novel Lipopeptides as Antibacterial Agents
申请人:Hill Jason
公开号:US20090011977A1
公开(公告)日:2009-01-08
The present invention relates to novel lipopeptide compounds. The invention also relates to pharmaceutical compositions of these compounds and methods of using these compounds as antibacterial compounds. The invention also relates to methods of producing these novel lipopeptide compounds and intermediates used in producing these compounds.
Convenient access to isoindolinones via carbamoyl radical cyclization. Synthesis of cichorine and 4-hydroxyisoindolin-1-one natural products
作者:Germán López-Valdez、Simón Olguín-Uribe、Alejandra Millan-Ortíz、Rocio Gamez-Montaño、Luis D. Miranda
DOI:10.1016/j.tet.2011.01.003
日期:2011.4
An efficient and convenient access to 2-tert-butylisoindolin-1-ones via an oxidative radical cyclization process from stable carbamoylxanthates, derived from secondary tert-butylamines, is described. The proposed mechanism for this transformation involves, the generation of a carbamoyl radical, its cyclization to the aromatic system, and the dilauroyl peroxide (DLP) mediated rearomatization to generate the isoindolinone ring system. Additionally, the syntheses of cichorine and 4-hydroxyisoindolin-1-one natural products were carried out to underscore the synthetic potential of this xanthate-based carbamoyl radical-oxidative cyclization. (C) 2011 Elsevier Ltd. All rights reserved.
US7408025B2
申请人:——
公开号:US7408025B2
公开(公告)日:2008-08-05
Quinazolinones, Quinazolinthiones, and Quinazolinimines as Nitric Oxide Synthase Inhibitors: Synthetic Study and Biological Evaluation
作者:M. Encarnación Camacho、Mariem Chayah、M. Esther García、Nerea Fernández-Sáez、Fabio Arias、Miguel A. Gallo、M. Dora Carrión
DOI:10.1002/ardp.201600020
日期:2016.8
The synthesis of different compounds with a quinazolinone, quinazolinthione, or quinazolinimine skeleton and their in vitro biologicalevaluation as inhibitors of inducible and neuronal nitric oxide synthase (iNOS and nNOS) isoforms are described. These derivatives were obtained from substituted 2‐aminobenzylamines, using diverse cyclization procedures. Furthermore, the diamines were synthesized by
描述了具有喹唑啉酮、喹唑啉硫酮或喹唑啉亚胺骨架的不同化合物的合成及其作为诱导型和神经元一氧化氮合酶 (iNOS 和 nNOS) 异构体抑制剂的体外生物学评价。这些衍生物是使用不同的环化程序从取代的 2-氨基苄胺中获得的。此外,二胺通过两种途径合成:常规途径和在连续流动氢化器中的高效单锅合成。这些杂环的结构由 1H 和 13C 核磁共振和高分辨率质谱数据证实。根据 R 自由基和 2 位 X 杂原子的影响讨论了目标分子的构效关系。一般来说,