Palladium-catalysed mono-α-alkenylation of ketones with alkenyl tosylates
作者:Yong Wu、Wai Chung Fu、Chien-Wei Chiang、Pui Ying Choy、Fuk Yee Kwong、Aiwen Lei
DOI:10.1039/c6cc08392g
日期:——
The first example of palladium-catalysed selective mono-[small alpha]-alkenylation of ketones with alkenyl tosylates is described. In the presence of Pd/XPhos catalyst system (0.1-1.0 mol%), the reaction provides mono--alkenylated of ketones in...
Investigation of the mechanisms of ene reactions of carbonyl enophiles by intermolecular and intramolecular hydrogen-deuterium isotope effects: partitioning of reaction intermediates
作者:Zhiguo Song、Peter Beak
DOI:10.1021/ja00178a042
日期:1990.10
concerted mechanism for each reaction. In the ene reactions of 1 with 8 catalyzed by tin tetrachloride and of 1 with acetylium hexachloroantimonate, both the intermolecular and intramolecularisotopeeffects are small, results that are inconsistent with either a stepwise reaction via an equilibrating intermediate or a concerted mechanism. The ene reaction of 2 with acetic anhydride catalyzed by zinc chloride