Rh(i)-catalyzed formal [2+2+2] cycloadditions of 1,6-diynes with potassium (Z)-(2-bromovinyl)trifluoroborate: a new strategy and a facile entry to polysubstituented benzene derivatives
作者:Xianjie Fang、Junyao Sun、Xiaofeng Tong
DOI:10.1039/c001830a
日期:——
A new strategy for Rh(I)-catalyzed [2+2+2] cycloadditions of 1,6-diynes with potassium (Z)-(2-bromovinyl)trifluoroborate as the third two-atom unit has been realized, which provides a facile entry to polysubstituented benzene derivatives.
Rhodium(III)-Catalyzed [2+2+2] Cyclotrimerization of Diynes with Maleic Anhydrides as Alkyne Equivalents
作者:Takanori Matsuda、Kentaro Suzuki
DOI:10.1002/ejoc.201500252
日期:2015.5
anhydrides function as syntheticequivalents of alkynes in a rhodium(III)-catalyzed reaction with 1,6-diynes to achieve a formal [2+2+2] cyclotrimerization. This approach is useful for reactions involving alkynes with low boiling points or severe ring strain. Hard-to-access [2+2+2] cycloadducts are available through this new cycloaddition strategy by employing easy-to-handle alkyne equivalents.