Efficient Route to 4-Substituted-2(5<i>H</i>)-furanones, 2(1<i>H</i>)-quinolones, and pyrones by Nickel-catalyzed Cross-coupling of Arenesulfonates with Organozinc Reagents
作者:Jie Wu、Xiaoyu Sun、Liang Zhang
DOI:10.1246/cl.2005.796
日期:2005.6
Nickel(II)-catalyzed cross-coupling reactions of 4-tosyl-2(1H)-quinolone, pyrone, and 2(5H)-furanone with various organozincreagents provide an efficient and practical method for the high-yielding...
Regiodivergent Ring-Expansion of Oxindoles to Quinolinones
作者:Hendrik L. Schmitt、Den Martymianov、Ori Green、Tristan Delcaillau、Young Seo Park Kim、Bill Morandi
DOI:10.1021/jacs.3c12119
日期:2024.2.21
The development of divergent methods to expedite structure–activity relationship studies is crucial to streamline discovery processes. We developed a rare example of regiodivergent ring expansion to access two regioisomers from a common starting material. To enable this regiodivergence, we identified two distinct reaction conditions for transforming oxindoles into quinolinone isomers. The presented
A photocatalytic method for the ring-closing 1,7-enyne metathesis using the α-amino radical as an alkene deconstruction auxiliary is present. Preliminary mechanistic studies suggest that intramolecular 1,5-hydrogen atom transfer is the key to the generation and β-scission of the α-amino radical, while the dearomatization of arenes and ring opening of cyclopropanes are the key to construct spirocyclic
Demethylenative cyclization of 1,7-enynes using α-amino radicals as a traceless initiator enabled by Cu(i)-photosensitizers
作者:Qinfang Jiang、Hanyang Bao、Yun Peng、Yan Zhou、Lang Chen、Yunkui Liu
DOI:10.1039/d4cc01592d
日期:——
A Cu(i)-photosensitizer-enabled demethylenative radical cyclization of 1,7-enynes to access quinoline-2-(1H)-ones was successfully achieved using α-amino radicals as a traceless radical initiator.