558-37-2Relevant articles and documents
Reactions of alkenylruthenium(II) complexes with hydrosilane: C-Si vs C-H bond formation
Maruyama, Yooichiroh,Yamamura, Kunihiro,Ozawa, Fumiyuki
, p. 905 - 906 (1998)
Alkenylruthenium complexes, Ru{C(R1)=CH(R2)}Cl(CO)-(PPh3)2 (R1 = H, R2 = Ph; R1 = H, R2 = t-Bu; R1 = Ph, R2 = Ph; R1 = CH=CH(SiMe3), R2 = SiMe2Ph), react with HSiMe2Ph via two reaction courses (path A and path B), leading to C-Si and C-H bond formation, respectively. Relative ratio of the two courses is strongly dependent upon steric bulkiness of substituent(s) on the alkenyl ligands.
Cocks,Frey
, p. 2566 (1970)
Intermolecular chemistry of a cyclopropylcarbene and its mechanistic implications
Huang, Haiyong,Platz, Matthew S.
, p. 8337 - 8340 (1996)
Trans-3-(2-tert-butylcyclopropyl)-3H-diazirine was decomposed both thermally (100°C) and photochemically (350 nm, -25 to 25°C) to give the anticipated ring-expanded 3-tert-butylcyclobutene product (50% photochemical, 64% thermal), along with azine and products of trapping by solvent. In the presence of tetramethylethylene (TME), a bicyclopropyl adduct was formed in yields as high as 37% (thermal) or 32% (photochemical). The yield of 3-tert-butylcyclobutene product, however, is only very slightly (0-7%) decreased upon increasing the concentratin of TME. Similar results were obtained with propylamine as the carbene trapping agent. The response of the product mixture to changes in the concentration of the trapping agent shows that there are two product-forming pathways. The mechanistic implications of these observations are discussed.
Deoxygenation of Epoxides with Carbon Monoxide
Maulbetsch, Theo,Jürgens, Eva,Kunz, Doris
, p. 10634 - 10640 (2020/07/30)
The use of carbon monoxide as a direct reducing agent for the deoxygenation of terminal and internal epoxides to the respective olefins is presented. This reaction is homogeneously catalyzed by a carbonyl pincer-iridium(I) complex in combination with a Lewis acid co-catalyst to achieve a pre-activation of the epoxide substrate, as well as the elimination of CO2 from a γ-2-iridabutyrolactone intermediate. Especially terminal alkyl epoxides react smoothly and without significant isomerization to the internal olefins under CO atmosphere in benzene or toluene at 80–120 °C. Detailed investigations reveal a substrate-dependent change in the mechanism for the epoxide C?O bond activation between an oxidative addition under retention of the configuration and an SN2 reaction that leads to an inversion of the configuration.
A smarter approach to catalysts by design: Combining surface organometallic chemistry on oxide and metal gives selective catalysts for dehydrogenation of 2,3-dimethylbutane
Rouge, Pascal,Garron, Anthony,Norsic, Sébastien,Larabi, Cherif,Merle, Nicolas,Delevoye, Laurent,Gauvin, Regis M.,Szeto, Kai C.,Taoufik, Mostafa
, p. 21 - 26 (2019/04/25)
2,3-dimethylbutane is selectively converted into 2,3-dimethylbutenes at 500 °C under hydrogen or at 390 °C under nitrogen in the presence of bimetallic catalysts Pt-Sn/Li-Al2O3. The high stability of the catalyst along the reaction is obtained by selective modification of the Pt/Li-Al2O3 catalyst using Surface Organometallic Chemistry (SOMC).