Stereoselective Synthesis of Vinyl Selenides by Coupling of Vinyl Bromides with Diorgano Diselenides Catalyzed by Copper(I) in [Bmim]BF<sub>4</sub>
作者:Weiliang Bao、Dezhi Chang
DOI:10.1055/s-2006-947320
日期:2006.7
The CuI/L-proline-catalyzed zinc-promoted coupling reaction of vinylbromides with diaryl diselenides or dialkyl diselenides readily occurred at 110 °C in [Bmim]BF 4 to give the corresponding vinyl selenides in good to excellent yields. The recyclable catalyst system offered a convenient, stereoselective and versatile method for the synthesis of vinyl selenides.
New stereospecific syntheses of pheromone bombykol and its three geometrical isomers
作者:Norio Miyaura、Hiroshi Suginome、Akira Suzuki
DOI:10.1016/s0040-4020(01)91575-3
日期:1983.1
New stereospecific syntheses of the pheromone bombykol and its threegeometricalisomers are achieved by palladium-catalyzed cross-coupling reaction between an appropriate alkenylborane and an alkenyl halide in the presence of a base.
Alkenyl chlorides and bromides are converted into tertiary enamides by treatment with a carbamoylsilane in toluene at 110 degrees C in the presence of phosphine-palladium(0) catalysts. [reaction: see text]
Synthetic approaches to isobutylamides of insecticidal interest
作者:Leslie Crombie、Mark A. Horsham、Robert J. Blade
DOI:10.1016/s0040-4039(00)96650-4
日期:1987.1
Syntheses of 10,11-dehydro- and 10,11-()-pipercide, piperovatin, and an ene-yne, and a perfluoro-isobutylamide, illustrate the utility of hydrozirconation methodology in this area.
The conjugate addition of cis- or trans-1-alkenyl-cuprolithium complexes (RCHCH)2CuLi · Xn1 to α, β-unsaturated carbonyl compounds was found to occur with high retention of double bond geometry, affording isomerically pure cis- or trans-γ, δ-ethylenic carbonyl compounds. The same 1-alkenylcuprates also react stereospecifically with alkyl halides to give isomerically pure cis- or trans-olefins.
发现在α,β-不饱和羰基化合物上可以顺式或反式-1-烯基-铜锂复合物(RCHCH)2 CuLi·X n 1的共轭加成反应,可以保持双键几何结构的高度保留,从而提供异构体纯的顺式-或反式-γ,δ-烯属羰基化合物。相同的1-烯基铜酸酯也与卤代烷立体定向反应,得到异构纯的顺式或反式烯烃。