A gold-catalyzed cyclization/carbonylation cascade reaction of 1,6-diynes is reported. The reaction goes through 6-exo-dig and 6-endo-dig cyclizations in sequence, followed by hydration to provide the β,γ-unsaturated ketones with moderate to high yields under mild reaction conditions. This is the first example of intercepting the postulated 1,3-oxazine vinylgold intermediate with another pendant alkyne
Synthesis of Polycyclic Isoindoline Derivatives via Tandem Pd-Catalyzed Coupling, Propargyl–Allenyl Isomerization, [4 + 2] Cycloaddition and Aromatization Reaction
作者:Shugao Zhu、Jian Cao、Luling Wu、Xian Huang
DOI:10.1021/jo301437k
日期:2012.11.16
We report in this paper an interesting sequential reaction involving sequential Sonogashira coupling, propargyl–allenyl isomerization, [4 + 2] cycloaddition and aromatization reaction, which provides a facile method for the synthesis of a variety of polycyclic isoindoline derivatives from easily accessible starting materials.
Domino Access to Yne-Functionalized Benzoisoindolines from Triynes
作者:Yimin Hu、Lidong Li、Qiong Hu、Pingping Zhou、Haifeng Xie、Xiaorong Zhang、Hao Zhang、Hua Wang
DOI:10.1055/s-0033-1341045
日期:——
The first examples of a convenient domino synthesis of fused yne-functionalized benzoisoindoline derivatives by a copper(I) iodide catalyzed cyclization reaction of simple triynes in a single operation are described.