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
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,