important macromolecules in mammalian cells, consisting of a core protein substituted with carbohydrate chains, known as glycosaminoglycans (GAGs). Simple xylosides carrying hydrophobic aglycons can enter cells and act as primers for GAG chain synthesis, independent of the core protein. Previously it has been shown that aromatic aglycons can be separated from the sugar residue by short linkers without affecting
Direct cross-coupling of benzyl alcohols to construct diarylmethanes via palladium catalysis
作者:Zhi-Chao Cao、Da-Gang Yu、Ru-Yi Zhu、Jiang-Bo Wei、Zhang-Jie Shi
DOI:10.1039/c4cc10084k
日期:——
A direct arylation to furnish diarylmethanes from benzyl alcohols was realized through Pd(PPh3)4-catalyzed Suzuki–Miyaura coupling via benzylic C–O activation in the absence of any additives. The arylation is compatible with various functional groups. This development provides an atom- and step-economic way to approach a diarylmethane scaffold under mild and environmentally benign conditions.
Nickel-Catalyzed Asymmetric Reductive Arylbenzylation of Unactivated Alkenes
作者:Youxiang Jin、Haobo Yang、Chuan Wang
DOI:10.1021/acs.orglett.0c00688
日期:2020.4.3
Herein, we report a nickel-catalyzed asymmetric two-component reductive dicarbofunctionalization of aryl iodide-tethered unactivated alkenes using benzylchlorides as the challenging coupling partner. This arylbenzylation reaction enables the efficient synthesis of diverse benzene-fused cyclic compounds bearing a quaternary stereocenter with a high tolerance of sensitive functionalities in highly enantioselective