Accessing Polyoxygenated Dibenzofurans via the Union of Phenols and <i>o</i>-Benzoquinones: Rapid Syntheses of Metabolites Isolated from <i>Ribes takare</i>
作者:Meng Yao Zhang、Russell A. Barrow
DOI:10.1021/acs.orglett.7b00840
日期:2017.5.5
construction of polyoxygenated dibenzo[b,d]furan frameworks from the union of substituted phenols/naphthols and o-benzoquinones via a Michael-oxidation-oxa-Michael cascade is reported. The power of this transformation is demonstrated in the generation of a library of highlysubstituted dibenzofurans, featuring specifically substituted molecules containing broad ranges of functionality. The utility of this
Enantioselective Ni-Catalyzed Electrochemical Synthesis of Biaryl Atropisomers
作者:Hui Qiu、Bin Shuai、Yun-Zhao Wang、Dong Liu、Yue-Gang Chen、Pei-Sen Gao、Hong-Xing Ma、Song Chen、Tian-Sheng Mei
DOI:10.1021/jacs.9b13117
日期:2020.6.3
A scalable enantioselective nickel-catalyzed electrochemical reductive homocoupling of aryl bromides has been developed, affording enantioenriched axially chiral biaryls in good yield under mild conditions using electricity as a reductant in an undivided cell. Common metal reductants such as Mn or Zn powder resulted in significantly lower yields in the absence of electric current under otherwise identical