Ortho Arylation of Acetanilides via Pd(II)-Catalyzed C−H Functionalization
摘要:
A remarkable transformation to realize ortho arylation of acetanilides via Pd(II)-catalyzed C-H functionalization with trialkoxyarylsinaes was demonstrated.
Palladium-Catalyzed Direct Monoarylation of Aryl C−H Bonds with Iodoarenes
作者:Li Su、Dong-Dong Guo、Bin Li、Shi-Huan Guo、Gao-Fei Pan、Ya-Ru Gao、Yong-Qiang Wang
DOI:10.1002/cctc.201700138
日期:2017.6.8
transition-metal-catalyzed direct arylation of nonactivated aryl C−Hbonds with iodoarenes has emerged as an important method for the construction of biaryls. Generally, the direct arylation reaction proceeds in the presence of stoichiometric Ag additives; moreover, the diarylation product is often unavoidable if there are two identical aromatic C−Hbonds in the substrate. Herein we disclose an efficient Pd(
过渡金属催化的未活化芳基CH键与碘代芳烃的直接芳基化已成为构建联芳基的重要方法。通常,直接芳基化反应在化学计量的Ag添加剂的存在下进行;优选地,在室温下进行。此外,如果在底物中存在两个相同的芳族CH键,则通常不可避免地存在二芳基化产物。在这里,我们公开了一种有效的Pd(OAc)2 /三氟乙酸/ O 2催化体系,该体系在无银条件下促进各种芳族CH键与各种碘代芳烃的直接芳基化反应。偶联反应具有完全的单芳基化选择性。这种方法为联芳烃提供了一种简单,便捷且经济的途径。
Ortho Arylation of Acetanilides via Pd(II)-Catalyzed C−H Functionalization
作者:Shangdong Yang、Bijie Li、Xiaobing Wan、Zhangjie Shi
DOI:10.1021/ja070767s
日期:2007.5.1
A remarkable transformation to realize ortho arylation of acetanilides via Pd(II)-catalyzed C-H functionalization with trialkoxyarylsinaes was demonstrated.
Isocyanurates with Planar Chirality: Design, Optical Resolution, and Isomerization
Designs and syntheses of isocyanurates (1–3) are described on the basis of a novel concept that two enantiotopic faces of Cs‐symmetric, prochiral planar molecules are differentiated with a location of groups at the top or bottom of the planar skeleton using a rigid linker. Such isocyanurates are atropisomeric. The planar‐chiral structures of 1 and 2anti (anti‐conformer of 2) were confirmed by single‐crystal