[EN] METHOD FOR PREPARING SILAHYDROCARBONS<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE SILAHYDROCARBURES
申请人:UNIV DELAWARE
公开号:WO2018064163A1
公开(公告)日:2018-04-05
The present disclosure is directed to a process for preparing silahydrocarbons of formula (I), the process comprising the step of reacting a compound of formula (II), with a compound of formula (III), as well as to silahydrocarbons prepared by such a process, and to compositions and articles of manufacture comprising such silahydrocarbons.
Stereoselective Synthesis of <i>Cis</i>- and <i>Trans</i>-Tetrasubstituted Vinyl Silanes Using a Silyl-Heck Strategy and Hiyama Conditions for Their Cross-Coupling
作者:Michael F. Wisthoff、Sarah B. Pawley、Andrew P. Cinderella、Donald A. Watson
DOI:10.1021/jacs.0c05382
日期:2020.7.15
report a palladium-catalyzed, three-component carbosilylation reaction of internal symmetrical alkynes, silicon electro-philes, and primary alkyl zinc iodides. Depending on the choice of ligand, stereoselective synthesis of either cis- or trans-tetrasubstituted vinyl silanes is possible. We also demonstrate conditions for the Hiyama cross-coupling of these products to prepare geometrically defined tetrasubstituted
A Bench-Stable, Single-Component Precatalyst for Silyl–Heck Reactions
作者:Sarah B. Krause、Jesse R. McAtee、Glenn P. A. Yap、Donald A. Watson
DOI:10.1021/acs.orglett.7b02807
日期:2017.10.20
reaction aimed at identifying active palladium complexes have revealed a new species that is formed in situ. This complex has been identified as the palladium iodide dimer, [(JessePhos)PdI2]2, which has been found to be a competent single-component precatalyst for the silyl-Heck reaction. This complex is easily prepared and is temperature, moisture, and airstable. Additionally, this precatalyst provides
Bromination and iodination of hydrosilanes and germanes were studied. Treatment of hydrosilanes with an excess of ethyl, propyl, or allyl bromide in the presence of a catalytic amount of PdCl2 or NiCl2 gave bromosilanes in good to high yield by hydrogen–halogen exchange. By using methyl, propyl, or allyl iodide as the iodine source, similar iodination of hydrosilanes was readily performed. Halogenation
Preparation of Functionalized<i>Z</i>-Olefins Using 1,1-Dimetalloalkanes
作者:Charles E. Tucker、Paul Knochel
DOI:10.1055/s-1993-25899
日期:——
1,1-Dimetalloalkanes obtained by the allylzincation of alkenylmagnesium compounds react smoothly with various functionalized alkylidenemalonates providing functionalized Z-olefins in good yields. If dimenthyl alkylidenemalonates are used, then excellent stereoselectivities are observed (92:8 to 100:0). An application to a short stereospecific synthesis of an insect pheromone [(Z)-7-dodecenyl acetate] is described (> 99.9% Z, 70% overall yield).