Alkene Isomerization-Hydroarylation Tandem Catalysis: Indole C2-Alkylation with Aryl-Substituted Alkenes Leading to 1,1-Diarylalkanes

2014 ◽  
Vol 9 (5) ◽  
pp. 1242-1246 ◽  
Author(s):  
Takeshi Yamakawa ◽  
Naohiko Yoshikai
Keyword(s):  
Tandem Catalysis ◽  
Alkene Isomerization

scholarly journals Lactone Synthesis by Enantioselective Orthogonal Tandem Catalysis

2019 ◽  
Vol 131 (28) ◽  
pp. 9585-9590
Author(s):  
Sourabh Mishra ◽  
Aaron Aponick
Keyword(s):  
Tandem Catalysis ◽  
Lactone Synthesis

scholarly journals Plastic waste to fuels by hydrocracking at mild conditions

2021 ◽  
Vol 7 (17) ◽  
pp. eabf8283
Author(s):  
Sibao Liu ◽  
Pavel A. Kots ◽  
Brandon C. Vance ◽  
Andrew Danielson ◽  
Dionisios G. Vlachos
Keyword(s):  
Direct Method ◽  
Acid Sites ◽  
Liquid Fuels ◽  
High Yield ◽  
Tandem Catalysis ◽  
Hy Zeolite ◽  
Environmental Threat ◽  
Single Use ◽  
Initial Activation ◽  
A Direct Method

Single-use plastics impose an enormous environmental threat, but their recycling, especially of polyolefins, has been proven challenging. We report a direct method to selectively convert polyolefins to branched, liquid fuels including diesel, jet, and gasoline-range hydrocarbons, with high yield up to 85% over Pt/WO3/ZrO2 and HY zeolite in hydrogen at temperatures as low as 225°C. The process proceeds via tandem catalysis with initial activation of the polymer primarily over Pt, with subsequent cracking over the acid sites of WO3/ZrO2 and HY zeolite, isomerization over WO3/ZrO2 sites, and hydrogenation of olefin intermediates over Pt. The process can be tuned to convert different common plastic wastes, including low- and high-density polyethylene, polypropylene, polystyrene, everyday polyethylene bottles and bags, and composite plastics to desirable fuels and light lubricants.

Boron insertion into alkyl ether bonds via zinc/nickel tandem catalysis

Science ◽  
2021 ◽  
Vol 372 (6538) ◽  
pp. 175-182
Author(s):  
Hairong Lyu ◽  
Ilia Kevlishvili ◽  
Xuan Yu ◽  
Peng Liu ◽  
Guangbin Dong
Keyword(s):  
Nickel Catalyst ◽  
Bioactive Compounds ◽  
Cyclic Ethers ◽  
Alkyl Ether ◽  
Tandem Catalysis ◽  
Mechanistic Studies ◽  
Alkyl Ethers ◽  
Nitrogen Substitution ◽  
Zinc Nickel

Mild methods to cleave the carbon-oxygen (C−O) bond in alkyl ethers could simplify chemical syntheses through the elaboration of these robust, readily available precursors. Here we report that dibromoboranes react with alkyl ethers in the presence of a nickel catalyst and zinc reductant to insert boron into the C−O bond. Subsequent reactivity can effect oxygen-to-nitrogen substitution or one-carbon homologation of cyclic ethers and more broadly streamline preparation of bioactive compounds. Mechanistic studies reveal a cleavage-then-rebound pathway via zinc/nickel tandem catalysis.

scholarly journals Stereoselective Tandem Iridium-Catalyzed Alkene Isomerization-Cope Rearrangement of ω-diene Epoxides: Efficient Access to Acyclic 1,6-Dicarbonyl Compounds

2021 ◽  
Author(s):  
Rahul Suresh ◽  
Itai Massad ◽  
Ilan Marek
Keyword(s):  
Bond Cleavage ◽  
Cope Rearrangement ◽  
Dicarbonyl Compounds ◽  
Alkene Isomerization ◽  
Efficient Access

The Cope rearrangement of 2,3-divinyloxiranes, a rare example of epoxide C-C bond cleavage, results in 4,5-dihydrooxepines which are amenable to hydrolysis, furnishing 1,6-dicarbonyl compounds containing two contiguous stereocenters at the 3- and 4- positions. We employ...

Both sites must turn over in tandem catalysis: Lessons from one-pot CO2 capture and hydrogenation

2021 ◽  
Author(s):  
Elizabeth A. K. Wilson ◽  
Shawn C. Eady ◽  
Trent Silbaugh ◽  
Levi T. Thompson ◽  
Mark A. Barteau
Keyword(s):  
Co2 Capture ◽  
Tandem Catalysis ◽  
One Pot ◽  
Turn Over

scholarly journals Tandem catalyzing the hydrodeoxygenation of 5-hydroxymethylfurfural over a Ni3Fe intermetallic supported Pt single-atom site catalyst

2021 ◽  
Author(s):  
Ge Meng ◽  
Kaiyue Ji ◽  
Wei Zhang ◽  
Yiran Kang ◽  
Yu Wang ◽  
...  
Keyword(s):  
Single Atom ◽  
Bond Rupture ◽  
Tandem Catalysis

A robust Pt1/Ni3Fe single-atom site catalyst was designed for the tandem catalysis of 5-hydroxymethylfurfural hydrodeoxygenation to DMF, where Pt atoms catalyze the CO group hydrogenation and Ni3Fe interface accounts for the C–OH bond rupture.

Tandem catalysis in electrochemical CO2 reduction reaction

Nano Research ◽  
2021 ◽  
Author(s):  
Yating Zhu ◽  
Xiaoya Cui ◽  
Huiling Liu ◽  
Zhenguo Guo ◽  
Yanfeng Dang ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Reduction Reaction ◽  
Tandem Catalysis ◽  
Electrochemical Co2 Reduction ◽  
Co2 Reduction Reaction

Asymmetric Hydroacylation Involving Alkene Isomerization for the Construction of C3‐Chirogenic Center

2021 ◽  
Author(s):  
Chong Liu ◽  
Jing Yuan ◽  
Zhenfeng Zhang ◽  
Ilya D. Gridnev ◽  
Wanbin Zhang
Keyword(s):  
Alkene Isomerization
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