13340-46-0

Upstream product

• 3277-89-2 phenethylmagnesium bromide 
• 78-10-4 tetraethoxy orthosilicate 
• 100-42-5 styrene 
• 64-17-5 ethanol 
• 998-30-1 Triethoxysilane 
• 673-32-5 1-Phenylprop-1-yne 
• 15267-95-5 chloromethyltriethoxysilane 
• 100-39-0 benzyl bromide 
• 501-65-5 diphenyl acetylene 
• 42599-24-6 E-styryl iodide 
• 57918-63-5 (Z)-styryl iodide 
• 298-07-7 Bis(2-ethylhexyl)phosphoric acid 
• 79-41-4 poly(methacrylic acid) 

Downstream Products

• 18849-30-4 (2-phenylethyl)triphenylsilane 

Relevant academic research and scientific papers

Platinum catalyzed hydrosilylation of alkynes: comparison of rates of addition of terminal olefins to internal alkynes

The relative rates of platinum catalyzed hydrosilylation of terminal olefins versus internal alkynes were compared in competitive reactions. (EtO)3SiH added almost exclusively (97percent) to PhCCPh versus styrene.The reaction of (EtO)3SiH with equimolar amounts of 2-decyne and 1-hexene gave a 78:22 ratio of alkyne products 6/6' versus alkene product 7.The reaction of (EtO)3SiH with equimolar amounts of styrene and 1-phenyl-1-propyne gave a 78:22 ratio of alkyne products 10/10' to products 9.The silane, Me3SiOSiMe2H, reacted with equimolar amounts of 2-decyne and 1-hexene to give a 90:10 ratio of alkyne products 8/8' to alkene product 9.All of the products had E stereochemistry about the C=C double bond as determined by 29Si NMR (3J(Si-H)).

Efficient magnetically separable heterogeneous platinum catalyst bearing imidazolyl schiff base ligands for hydrosilylation

Reported herein is a magnetically separable heterogeneous nano catalyst Fe3O4@SiO2-biIMI- PtCl2, which is prepared by firstly applying a SiO2 coating onto readily synthesized magnetite nanoparticles via the hydrolysis condensation of tetraethyl orthosilicate (TEOS) under basic conditions, then modifying it using aminopropyl triethoxysilane and bis(imidazole) aldehyde, and finally incorporating a PtCl2 complex via coordination chemistry. The chemical structure and morphology of the nanocatalyst as well as the valence state and content of platinum within this catalyst were carefully characterized. This catalyst can mediate the hydrosilylation between 1-octene and hydrosilane, with the conversion of 1-octene reaching up to 99%, and it shows good regioselectivity as only β-adducts are identified. In addition, this catalyst can be reused for at least 5 cycles. The hydrosilylation reaction between different olefins and hydrosilanes can also be efficiently mediated by Fe3O4@SiO2-biIMI-PtCl2.

COMPOUND, AND MANUFACTURING METHOD OF COMPOUND

PROBLEM TO BE SOLVED: To provide a novel silane coupling agent and its manufacturing method. SOLUTION: A compound represented by the following formula (1). In the formula (1), R1 and R2 each independently represents a hydrocarbon group. m represents an integer of 1 to 3. n represents an integer of 0 to 2. However, a relational formula of m + n=3 is satisfied. In the formula (1), L1 represents a single bond or a divalent organic group. In the formula (1), L2 represents a divalent hydrocarbon group that may have -S-CO- or -CO-S-. In the formula (1), X represents a substituent. y represents an integer of 0 to 4. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT

Platinum-Pyridine Schiff base complexes immobilized onto silica gel as efficient and low cost catalyst for hydrosilylation

A heterogeneous platinum catalyst with tridentate pyridine Schiff base ligands supported on silica gel is reported. The catalyst was fully characterized via FTIR, solid-state 13C NMR spectroscopy, X-ray photoelectron spectroscopy (XPS), N2 adsorption/desorption analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The catalyst showed potential application in mediating hydrosilylation reactions between olefins and hydrosilanes, and it can be reused for at least five cycles.

Platinum-Imidazolyl Schiff Base Complexes Immobilized in Periodic Mesoporous Organosilica Frameworks as Catalysts for Hydrosilylation

An imidazolyl Schiff base-containing periodic mesoporous organosilica (PMO) was synthesized via co-condensation reactions between a newly prepared bis (imidazolyl)imine-bridged bis silane and tetraethyl orthosilicate in the presence of cetyltrimethyl ammonium bromide as a soft template. The resultant as-synthesized PMO was then employed as a solid support for platinum catalysts. This complex was fully characterized via various techniques including FTIR, solid-state13C NMR, and 29Si-NMR spectroscopy, as well as N2 adsorption/desorption analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) methods. In addition, the catalyst was proven to efficiently mediate hydrosilylation reactions between olefins and hydrosilanes, and it can be reused for at least five cycles without significant loss of activity.

Platinum(II) complexes bearing bulky Schiff base ligands anchored onto mesoporous SBA-15 supports as efficient catalysts for hydrosilylation

Reported herein is an easy-to-prepare novel heterogeneous catalyst of platinum complexes bearing binary ligands of bidentate naphthalenolimine and cyclo-1,5-octadiene that are anchored onto mesoporous silica SBA-15. The presence of the binary ligands not only stabilized the platinum, but also enabled the platinum atoms to form nanoclusters with diameters of ca 1?nm, and led to high platinum loading (8.69?wt%). Moreover, the platinum catalyst exhibited high catalytic activity towards hydrosilylation of terminal alkenes and styrene with silanes under mild and solvent-free conditions, with excellent regioselectivity.

Preparation, characterization and evaluation of a series of heterogeneous platinum catalysts immobilized on magnetic silica with different acid ligands

Platinum was immobilized on magnetic silica gel by means of boronic, nitric, carboxylic or sulfuric acid ligands to give four heterogeneous Pt nano-catalysts, designated as Fe3O4@SiO2-BA@Pt, Fe3O4@SiO2-NA@Pt, Fe3O4@SiO2-CA@Pt and Fe3O4@SiO2-SA@Pt, respectively. Particles of these mono-dispersible Pt catalysts were 10–20?nm in size and could be separated for recycling by means of a magnet. Fe3O4@SiO2-BA@Pt (0.174?mmol/g Pt) showed the best catalytic activity and selectivity, which were better than Speier’s catalyst. Its turnover numbers were up to 1.7 × 106 and 1.1 × 106 for hydrosilylation of 1-hexene or styrene, respectively. This material could also catalyze the hydrosilylation of a broad range of alkenes and alkynes as substrates and methyldichlorosilane or triethoxysilane as silanes. Similar yields of 1-hexyl-methyldichlorosilane at the first and eighth runs (96.5% and 95.2%, respectively), together with a final Pt content of 0.171?mmol/g indicated the outstanding stability of Fe3O4@SiO2-BA@Pt under the catalytic reaction conditions.

The effect of an acylphosphine ligand on the rhodium-catalyzed hydrosilylation of alkenes

We synthesized a series of acylphosphines and investigated the hydrosilylation of alkenes that were catalyzed using RhCl3/acylphosphine. The results indicated that RhCl3/(diphenylphosphino) (phenyl)methanone exhibited higher activity as well as higher levels of β–adduct selectivity.

Synthesis of novel poly(ethylene glycol)-containing imidazolium-functionalized phosphine ligands and their application in the hydrosilylation of olefins

A series of polyethylene glycol-containing imidazolium-functionalized phosphine ligands (mPEG-im-PPh2) were successfully synthesized and used in the rhodium-catalyzed hydrosilylation of olefins. The results indicate that the RhCl3/mPEG-im-PPh2 catalytic system exhibits both excellent activity and selectivity for the β-adduct. In addition, the catalytic system may be recycled at least six times.

Manganese-Catalyzed Hydrofunctionalization of Alkenes

The manganese-catalyzed hydrosilylation and hydroboration of alkenes has been developed using a single manganese(II) precatalyst and reaction protocol. Both reactions proceed with excellent control of regioselectivity and in high yields across a variety of sterically and electronically differentiated substrates (25 examples). Alkoxide activation, using NaOtBu, was key to precatalyst activation and reactivity. Catalysis was achieved across various functional groups and on gram-scale for both the developed methodologies with catalysts loadings as low as 0.5 mol %.