A Palladium/Copper Bimetallic Catalytic System: Dramatic Improvement for Suzuki–Miyaura‐Type Direct CH Arylation of Azoles with Arylboronic Acids
作者:Bo Liu、Xurong Qin、Kaizhi Li、Xiyu Li、Qiang Guo、Jingbo Lan、Jingsong You
DOI:10.1002/chem.201001338
日期:2010.10.18
Bimetalliccatalyticsystem: Palladium/copperbimetallic‐catalyzed Suzuki–Miyaura‐type coupling has been disclosed for directCHarylation of azoles, instead of azole halides or pseudohalides, with arylboronicacids (see scheme).
Palladium-Catalyzed Direct Arylation of N-Heteroarenes with Arylsulfonyl Hydrazides
作者:Bo Liu、Jian Li、Feijie Song、Jingsong You
DOI:10.1002/chem.201201450
日期:2012.8.27
Hydrazides applied: A palladium‐catalyzed direct CH arylation of heteroarenes, with arylsulfonylhydrazides as the arylating reagents, has been developed (see scheme). The reaction is chemoselective, in that arylsulfonylhydrazides containing halogen substituents can be employed without participation of the halogen substituent in the reaction. The method offers a straightforward approach to a variety
Double C−H Activation: The Palladium-Catalyzed Direct C-Arylation of Xanthines with Arenes
作者:Chandi C. Malakar、Dietmar Schmidt、Jürgen Conrad、Uwe Beifuss
DOI:10.1021/ol200065s
日期:2011.3.18
The novel Pd-catalyzedC(sp2)−H/C(sp2)−H cross-coupling of unactivated xanthines with unactivated arenes utilizing a combination of Ag(I) and O2 as oxidants exclusively yields C-8 arylated xanthines in a single synthetic operation.
Palladium-Catalyzed Desulfitative CH Arylation of Heteroarenes with Sodium Sulfinates
作者:Bo Liu、Qiang Guo、Yangyang Cheng、Jingbo Lan、Jingsong You
DOI:10.1002/chem.201102644
日期:2011.11.25
Desulfitative CHarylation: Palladium‐catalyzed desulfitative CHarylation of heteroarenes with sodium sulfinates has been disclosed to construct aryl–heteroaryl bonds without the need for any extra ligands (see scheme).