Thermal and Au(I)-Catalyzed Intramolecular [4+2] Cycloaddition of Aryl-Substituted 1,6-Diynes for the Synthesis of Biaryl Compounds
作者:Takanori Shibata、Ryo Fujiwara、Daisuke Takano
DOI:10.1055/s-2005-871959
日期:——
1,6-Diynes, possessing aryl groups on their termini, undergo an intramolecular [4+2] cycloaddition via strained cyclic allene intermediates to give various biaryl compounds. Under thermal conditions, isomerization of the intermediates occurs, while, in the presence of a cationic gold catalyst, skeletal rearrangement is a major pathway.
1,6-二炔在其末端具有芳基,通过紧张的环状丙二烯中间体进行分子内[4+2]环加成,得到各种联芳基化合物。在热条件下,中间体发生异构化,而在阳离子金催化剂的存在下,骨架重排是主要途径。