Ruthenium-Catalyzed Carboxylative Cyclization of 1,6-Diynes
作者:Hahn Kim、Stephen D. Goble、Chulbom Lee
DOI:10.1021/ja067336e
日期:2007.2.1
with 1,6-terminal diynes to give rise to cyclohexylidene enol carboxylates as the products with exclusive (E)-selectivity. A set of control experiments suggests that the reaction proceeds through a mechanism involving an anti attack of the carboxylate nucleophile on the π-alkyne coordinated to a ruthenium vinylidene complex. Thus, the new reaction achieves C−C bond formation through a dual mode of alkyne