[Fe(F<sub>20</sub>TPP)Cl]-Catalyzed Amination with Arylamines and {[Fe(F<sub>20</sub>TPP)(NAr)](PhINAr)} + . Intermediate Assessed by High-Resolution ESI-MS and DFT Calculations
作者:Yungen Liu、Guo-Qiang Chen、Chun-Wai Tse、Xianguo Guan、Zheng-Jiang Xu、Jie-Sheng Huang、Chi-Ming Che
DOI:10.1002/asia.201402580
日期:2015.1
Amination of CH bonds catalyzed by transition metal complexes via nitrene/imide insertion is an appealing strategy for CN bond formation, and the use of iminoiodinanes, or their in situ generated forms from ‘PhI(OAc)2+primary amides (such as sulfonamides, sulfamates, and carbamates)’, as nitrogen sources for the amination reaction has been well documented. In this work, a ‘metal catalyst+PhI(OAc)2+primary
的Ç胺化经由氮烯/酰亚胺插入由过渡金属配合物催化的H键是对于C一个有吸引力的策略 N键的形成,以及使用iminoiodinanes的,或从“岛(OAC)其在原位产生的形式2个+伯酰胺(如磺酰胺,氨基磺酸盐和氨基甲酸酯等,作为胺化反应的氮源已被充分证明。在这项工作中,使用[Fe(F 20 TPP)Cl](H 2 F 20 TPP = meso- tetrakis(五氟苯基)卟啉)作为“金属催化剂+ PhI(OAc)2 +伯芳基胺”的胺化方案已被开发出来。催化剂。该催化方法适用于sp的分子内和分子间胺化2个SP 3 Ç H键(> 27个实施例),得到氨基化的产品,包括天然产物如吴茱萸,在中度至良好的产率。ESI-MS分析和DFT计算借给的参与支持[铁(F 20 TPP)(NC 6 H ^ 4 - p -NO 2)](PHI = NC 6 H ^ 4 - p -NO 2)}在中间催化。
Metal-Free Synthesis of Polycyclic Quinazolinones Enabled by a (NH<sub>4</sub>
)<sub>2</sub>
S<sub>2</sub>
O<sub>8</sub>
-Promoted Intramolecular Oxidative Cyclization
An efficient metal‐free, (NH4)2S2O8 mediated intramolecularoxidativecyclization for the construction of fused polycyclic quinazolinone derivatives under mild conditions was disclosed. This method provides an efficient and facile approach to the synthesis of polycyclic quinazolinone derivatives (> 40 examples), as well as the natural products tryptanthrin, rutaecarpine, and their analogues.
公开了在温和条件下用于构建稠合多环喹唑啉酮衍生物的高效无金属,(NH 4)2 S 2 O 8介导的分子内氧化环化反应。该方法为合成多环喹唑啉酮衍生物(> 40个实例)以及天然产物色胺酮,芸苔芸香碱及其类似物提供了一种高效简便的方法。
Copper-Catalyzed Intramolecular α-C–H Amination via Ring-Opening Cyclization Strategy to Quinazolin-4-ones: Development and Application in Rutaecarpine Synthesis
作者:Srilaxmi M. Patel、Harika Chada、Sonali Biswal、Sonika Sharma、Duddu S. Sharada
DOI:10.1055/s-0037-1611575
日期:2019.8
amination has been developed for the synthesis of quinazolin-4(3H)-onederivatives from commercially available isatoic anhydride and primary and secondary benzylamines via ring-opening cyclization (ROC). This method shows good functional group tolerance and allows access to a range of 2-aryl, 2-alkyl, and spiroquinazolinone derivatives. However, 2-methylquinazolin-4(3H)-one was synthesized from 2-amino-N-isopropylbenzamide
I<sub>2</sub>-Catalyzed cross dehydrogenative coupling: rapid access to benzoxazinones and quinazolinones
作者:Kaili Chen、Biao Gao、Yanguo Shang、Jianyao Du、Qinlan Gu、Jinxin Wang
DOI:10.1039/c7ob02038d
日期:——
efficient and applicable I2-catalyzed intramolecular dehydrogenative C-O/C-N coupling reaction via activating the C-H bond adjacent to the N atom has been developed to provide dozens of substituted benzoxazinones (31 examples) and quinazolinones (5 examples) in good to excellent yields (up to 98%). This one-pot methodology has significant advantages, including metal-free process, broad substrate scope,