Ligand-Free Iron-Catalyzed Carbon (sp<sup>2</sup>)–Carbon (sp<sup>2</sup>) Oxidative Homo-Coupling of Alkenyllithiums
作者:Zhuliang Zhong、Zhi-Yong Wang、Shao-Fei Ni、Li Dang、Hung Kay Lee、Xiao-Shui Peng、Henry N. C. Wong
DOI:10.1021/acs.orglett.8b03893
日期:2019.2.1
and hexa-substituted 1,3-butadienes. This one-pot procedure involves lithium–iodine exchange to generate the corresponding vinyllithium intermediates. A subsequent iron-catalyzed ligand-free oxidativehomo-coupling eventually led to the formation of 1,3-butadienes in acceptable to excellent isolated yields.
Photochemical Nozaki–Hiyama–Kishi Coupling Enabled by Excited Hantzsch Ester
作者:Yonghong Liu、Shuangjie Lin、Dandan Zhang、Bingkun Song、Yunhe Jin、Erjun Hao、Lei Shi
DOI:10.1021/acs.orglett.2c00877
日期:2022.5.13
This work reports the first photochemical Nozaki–Hiyama–Kishi coupling enabled by bioinspired Hantzsch ester. The salient feature of this process is that commercially available and low-cost organic photoactive Hantzsch ester can serve as both an electron and a proton donor to reduce Cr/Ni to low-valent species and hydrolyze the CrIII-alkoxy bond, thus bypassing the use of stoichiometric metallic reductants