Ruthenium-Catalyzed [2 + 2] Cycloaddition of Allenynes Leading to a Bicyclo[4.2.0]octa-1(8),5-diene Skeleton
作者:Nozomi Saito、Yuki Tanaka、Yoshihiro Sato
DOI:10.1021/ol901616b
日期:2009.9.17
employed. That is, while a cyclodimerization of allenyne proceeded to give a pentacyclic compound in toluene, a bicyclo[4.2.0]octa-1(8),5-diene derivative was exclusively produced by [2 + 2] cycloaddition of allenyne in methanol. It was also demonstrated that the [2 + 2] cycloaddition was catalyzed by a cationic ruthenium complex generated from Cp*RuCl(cod) and methanol in situ.
Ruthenium-Catalyzed [2 + 2] Cyclization of 1,7-Allenynes in Ionic Liquid and Catalyst Recycling
作者:Nozomi Saito、Momoko Koyama、Yoshihiro Sato
DOI:10.3987/com-18-s(t)46
日期:——
Ruthenium-catalyzed [2 + 2] cyclization of 1,7-allenynes in ionic liquid ([BDMI]PF6) as a reaction medium proceeded to give the corresponding bicyclo[4.2.0]octa-1(8),5-diene derivative in high yield. Furthermore, the recovered catalyst immobilized in the ionic liquid could be recycled up to 10 times.