Nucleophilic reactivity of the carbon-carbon double bond—V
作者:P.D. Bartlett、E.M. Nicholson、R. Owyang
DOI:10.1016/s0040-4020(01)90951-2
日期:1966.1
The acetolysis of 3-(Δ2-cyclohexenyl)propyl p-nitrobenzenesulfonate (11) is 1·64 times as fast as that of its saturated analog, the 3-cyclohexylpropyl ester; it leads to a mixture including 18·9% of bicyclic products, which consist of olefins (3 or 4) and acetate (2) in the ratio of 1·67 to 1. The product is closely related in composition to that obtained7 by acetolysis of the toluenesulfonate (14)
Adjusting the Features of Active Metallocene Ziegler Systems fot Their Potential Use as Carbon–Carbon Coupling Catalysts in Organic Synthesis
作者:Sven Thiele、Gerhard Erker
DOI:10.1002/cber.19971300210
日期:1997.2
A variety of bent metallocene dichloride/methylalumoxane catalysts, derived from the zirconocene complexes 10, 12-18, have been employed in intramolecular olefin-coupling reactions yielding monomeric or dimeric products. This was achieved by using optimized reaction conditions employing low substrate concentrations (1.0-1.8 M) and rather long reaction times. Under these particular conditions, 1,5-hexadiene