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。
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,
Synthesis of Cu-catalysed quinazolinones using a C<sub>sp3</sub>–H functionalisation/cyclisation strategy
作者:Aniket V. A. Gholap、Soham Maity、Carola Schulzke、Debabrata Maiti、Anant R. Kapdi
DOI:10.1039/c7ob01723e
日期:——
A series of 2,3-disubstituted-4(3H)-quinazolinones were synthesised via a copper-catalysed Csp3–H functionalisation/cyclisation of 2-amino-N,N-dialkylbenzamides. In comparison to the reported methods this strategy allows an easy access to diversely substituted quinazolinones under mild conditions in air. The reaction also exhibits good functionalgroup tolerance and would be of value to heterocyclic