SELECTIVE OLEFIN METATHESIS WITH CYCLOMETALATED RUTHENIUM COMPLEXES
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US20160185684A1
公开(公告)日:2016-06-30
This invention relates generally to C—H activated ruthenium olefin metathesis catalyst compounds which are stereogenic at the ruthenium center, to their preparation, and the use of such catalysts in the metathesis of olefins and olefin compounds. In particular, the invention relates to the use of C—H activated ruthenium olefin metathesis catalyst compounds in Z-selective olefin metathesis reactions, enantio-selective olefin metathesis reactions, and enantio-Z-selective olefin metathesis reactions. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and industrial and fine chemicals chemistry.
partners including those containing sulfur and nitrogen heterocycles. An example of an intramolecular Rh‐catalyzed [5+2]‐cycloaddition of a vinyl spirocyclopropane is demonstrated, providing rapid access to a complex tricyclic framework. Overall, this catalyst system is capable of suppressing the kinetically facile 1,2‐hydride shift, which has hampered the development of Simmons−Smith reactions using
A New Ruthenium-Catalyzed Hydrogen-Transfer Reaction: Transformation of 3-Benzyl But-1-ynyl Ethers into 1,3-Dienes and Benzaldehyde
作者:Kuo-Liang Yeh、Bo Liu、Ching-Yu Lo、Heh-Lung Huang、Rai-Shung Liu
DOI:10.1021/ja012623y
日期:2002.6.1
We report a ruthenium-catalyzedreaction for various 3-benzyl but-1-ynyl ethers with suitable functionalities. Treatment of these substrates with TpRu(PPh3)(CH3CN)2PF6 (8.0 mol %) catalyst in 1,2-dichloroethane (80 degrees C, 12 h) afforded functionalized 1,3-dienes and benzyl aldehyde in good yields. This process is considered to be a tandem dealkoxylation and transfer hydrogenation. Deuterium-labeling
Nickel-Catalyzed Three-Component Connection Reaction of Dimethylzinc, 1,ω-Ene-Diene, and Acetone: Synthesis of 1,2-Disubstituted Cycloalkanes
作者:Yoshinao Tamaru、Masanari Kimura、Keisuke Kojima
DOI:10.1055/s-2004-834908
日期:——
Under nickel catalysis, 1,3,8-nonatrienes and 1,3,9-decatrienes 3 react at room temperature with dimethylzinc and acetone at the alkene and diene termini, respectively, providing 1,2-disubstituted cycloalkanes 4 in good yield. The stereoselectivities of 4 provide useful information about the mechanistic frameworks for the present reaction and related cyclization reaction of Ï-dienynes 1.
Rhodium-Catalyzed Carbonylative [3+2+1] Cycloaddition Reaction: Catalytic Formation of Bicyclic Cyclohexenones from Trienes and Carbon Monoxide
作者:Sang Ick Lee、Ji Hoon Park、Young Keun Chung、Sueg-Geun Lee
DOI:10.1021/ja039301+
日期:2004.3.1
The rhodium-catalyzed carbonylative [3+2+1] cycloaddition of trienes into bicyclohexenones has been developed. The carbonylated cycloaddition products have a high regioselectivity. This catalytic system tolerates functionalities including ether, sulfonamide, and ester.