Reductive Activation and Hydrofunctionalization of Olefins by Multiphoton Tandem Photoredox Catalysis
作者:Milena L. Czyz、Mitchell S. Taylor、Tyra H. Horngren、Anastasios Polyzos
DOI:10.1021/acscatal.1c01000
日期:2021.5.7
of olefin feedstocks to architecturally complex alkanes represents an important strategy in the expedient generation of valuable molecules for the chemical and life sciences. Synthetic approaches are reliant on the electrophilicactivation of unactivated olefins, necessitating functionalization with nucleophiles. However, the reductive functionalization of unactivated and less activatedolefins with
Nickel-Catalyzed Reductive Cross-Coupling of Benzyl Halides with Aryl Halides
作者:Qun Qian、Hegui Gong、Qingchen Zhang、Xuan Wang
DOI:10.1055/s-0035-1562442
日期:——
Abstract Systematic studies of the coupling of benzylic with aryl halides are presented. The optimized reaction conditions for electron-deficient aryl halides cannot be applied to the electron-rich or neutral counterparts, and vice versa. The excellent functional group tolerance and broad substrate scope may enable the current work to be useful for the construction of diaryl methane products. Systematic
Feedstocks to Pharmacophores: Cu-Catalyzed Oxidative Arylation of Inexpensive Alkylarenes Enabling Direct Access to Diarylalkanes
作者:Aristidis Vasilopoulos、Susan L. Zultanski、Shannon S. Stahl
DOI:10.1021/jacs.7b03387
日期:2017.6.14
A Cu-catalyzed method has been identified for selective oxidative arylation of benzylic C-H bonds with arylboronic esters. The resulting 1,1-diarylalkanes are accessed directly from inexpensive alkylarenes containing primary and secondary benzylic C-H bonds, such as toluene or ethylbenzene. All catalyst components are commercially available at low cost, and the arylboronic esters are either commercially
已经确定了一种 Cu 催化的方法,用于苄基 CH 键与芳基硼酸酯的选择性氧化芳基化。所得的 1,1-二芳基烷烃可直接从含有伯和仲苄基 CH 键的廉价烷基芳烃(如甲苯或乙苯)中获得。所有催化剂组分均可以低成本商购获得,并且芳基硼酸酯可商购获得或容易从商购硼酸获得。强调了这些方法在药物化学应用中的潜在效用。
Cation−π Interactions in the Benzylic Arylation of Toluenes with Bimetallic Catalysts
作者:Sheng-Chun Sha、Sergei Tcyrulnikov、Minyan Li、Bowen Hu、Yue Fu、Marisa C. Kozlowski、Patrick J. Walsh
DOI:10.1021/jacs.8b05143
日期:2018.10.3
A method to directly arylate toluene derivatives with aryl bromides to generate diarylmethanes, which are important building blocks in drug discovery, is described. In this method, KN(SiMe3)2 in combination with a (NIXANTPHOS)Pd catalyst accomplished the deprotonative activation of toluene derivatives to permit cross-coupling with aryl bromides. Good to excellent yields are obtained with a range of
Ni‐catalyzed hydroarylation of styrenes and 1,3‐dienes with organoboron compounds has been developed. The reaction offers a highly selective approach to diarylalkanes and allylarenes under redox‐neutral conditions. In this hydroarylation reaction, a new strategy that uses the proton of methanol to generate the active catalyst species Ni−H was developed. The Ni‐catalyzed hydroarylation, combined with