Nickel‐Catalyzed Annulation of
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‐Haloarylamidines with Aryl Acetylenes: Synthesis of Isoquinolone and 1‐Aminoisoquinoline Derivatives
作者:Hao Xie、Qiaoyan Xing、Zhifei Shan、Fuhong Xiao、Guo‐Jun Deng
DOI:10.1002/adsc.201801635
日期:2019.4.16
An efficient method for the synthesis of substituted 1(2H)‐isoquinolone derivatives via nickel‐catalyzed annulation of substituted 2‐halobenzamidines with aryl alkynes in the presence of water is described. Benzo[4,5]imidazo[2,1‐a]isoquinolines were formed as the dominated products when dry dimethyl sulfoxide was used as the solvent. Furthermore, when benzyl substituted amidines were used as the substrates
Solvent-Switched Benzylic Methylene Functionalization: Addition, Ring-Opening, Cyclization, and Unexpected Cleavage of C–O and C–C Bonds
作者:Deng Yuan Li、Xue Song Shang、Guo Rong Chen、Pei Nian Liu
DOI:10.1021/ol401470y
日期:2013.8.2
been achieved using imines as reagents and potassium tert-butoxide as the catalyst. Depending on the solvent used, the reaction proceeds by two pathways. In THF, an addition/elimination reaction of exo-cyclic enol ethers with imines provides dihydroisobenzofuranderivatives in good yield. In DMSO, an addition/ring-opening/cyclization cascade reaction occurs with unexpected cleavage of C–O and C–C bonds
Transition Metal-Free Cascade Reactions of Alkynols to Afford Isoquinolin-1(2<i>H</i>)-one and Dihydroisobenzofuran Derivatives
作者:Deng Yuan Li、Ke Ji Shi、Xiao Feng Mao、Guo Rong Chen、Pei Nian Liu
DOI:10.1021/jo5006312
日期:2014.5.16
Transition metal-free cascade reactions of alkynols with imines have been achieved using potassium tert-butoxide as catalyst. Switching the reaction solvent gives two kinds of products in good yield: isoquinolin-1(2H)-one derivatives and dihydroisobenzofuran derivatives. This approach was used to generate the natural product 8-oxypseudopalmatine in a two-step procedure from commercially available starting materials. Additionally, multicomponent reactions of alkynols, aldehydes, and amines were also successfully achieved to afford isoquinolin-1(2H)-one derivatives.