Steric and Chelate Directing Effects in Aromatic Borylation
作者:Jian-Yang Cho、Carl N. Iverson、Milton R. Smith
DOI:10.1021/ja0013069
日期:2000.12.1
Jian-Yang Cho, Carl N. Iverson, and Milton R. Smith, III*Department of Chemistry, Michigan State UniVersityEast Lansing, Michigan 48824ReceiVed April 14, 2000ReVised Manuscript ReceiVed October 18, 2000Hydrocarbon activation has attracted considerable attentionbecause hydrocarbon feedstocks are ubiquitous.
Jan-Yang Cho, Carl N. Iverson, and Milton R. Smith, III*Department of Chemistry, Michigan State University East Lansing, Michigan 48824ReceiVed April 14, 2000Receive Manuscript Received 2000 年 10 月 18 日 碳氢化合物活化已引起相当多的关注,因为碳氢化合物的原料无处不在。
Sterically Controlled Alkylation of Arenes through Iridium-Catalyzed CH Borylation
作者:Daniel W. Robbins、John F. Hartwig
DOI:10.1002/anie.201208203
日期:2013.1.14
one‐pot method for the site‐selective alkylation of arenes controlled by steric effects is reported. The process occurs through Ir‐catalyzed CHborylation, followed by Pd‐ or Ni‐catalyzed coupling with alkyl electrophiles. This selectivity complements that of the typical Friedel–Crafts alkylation; meta‐selective alkylation of a broad range of arenes with various electronic properties and functional
Copper‐Catalyzed Oxidative Cross‐Coupling of Electron‐Deficient Polyfluorophenylboronate Esters with Terminal Alkynes
作者:Zhiqiang Liu、Yudha P. Budiman、Ya‐Ming Tian、Alexandra Friedrich、Mingming Huang、Stephen A. Westcott、Udo Radius、Todd B. Marder
DOI:10.1002/chem.202002888
日期:2020.12.18
We report herein a mild procedure for the copper‐catalyzed oxidative cross‐coupling of electron‐deficient polyfluorophenylboronate esters with terminal alkynes. This method displays good functional group tolerance and broad substrate scope, generating cross‐coupled alkynyl(fluoro)arene products in moderate to excellent yields. Thus, it represents a simple alternative to the conventional Sonogashira
Two-component boronic acid catalysis for increased reactivity in challenging Friedel–Crafts alkylations with deactivated benzylic alcohols
作者:Hwee Ting Ang、Jason P. G. Rygus、Dennis G. Hall
DOI:10.1039/c9ob01043b
日期:——
report the use of perfluoropinacol as an effective co-catalyst to improve the reactivity of a boronic acid catalyst in the Friedel-Crafts benzylations of electronically deactivated primary and secondary benzylic alcohols. According to spectroscopic studies, it is believed that perfluoropinacol condenses with the arylboronic acid catalyst to form a highly electrophilic and Lewis acidic boronicester. This
Iridium‐Catalysed C−H Borylation of Fluoroarenes: Insights into the Balance between Steric and Electronic Control of Regioselectivity
作者:Mingyan Ding、Jonathan A. Reuven、Andrew C. Hones、Mark A. Fox、Patrick G. Steel
DOI:10.1002/ejoc.202201005
日期:2022.12.19
Iridium catalysed C−H borylation provides an effective method for late stage functionalization of fluorinated arenes and heteroarenes. The reaction occurs rapidly and efficiently with selectivity that can be best predicted using computed relative transition stage energies.