Enantioselective Formal [3+2]-Cycloadditions to Access Spirooxindoles Bearing Four Contiguous Stereocenters through Synergistic Catalysis

2021 ◽  
Author(s):  
Jun-An Xiao ◽  
Jin-Lian Li ◽  
Xiu-Liang Chen ◽  
Kai Chen ◽  
Peng Hai ◽  
...  
Keyword(s):  
Ring Opening ◽  
Synergistic Catalysis

An enantioselective ring-opening formal [3+2]-cycloaddition of spirovinylcyclopropyl oxindoles with enals via synergistic catalysis of palladium(0) and chiral organocatalyst has been developed, affording spirooxindoles bearing four contiguous stereocenters in good yields...

scholarly journals Synergistic catalysis: enantioselective cyclopropanation of alkylidene benzoxazoles by Pd(ii) and secondary amine catalysis. Scope, limitations and mechanistic insight

2018 ◽  
Vol 5 (5) ◽  
pp. 806-812 ◽  
Author(s):  
Marta Meazza ◽  
Victor Polo ◽  
Pedro Merino ◽  
Ramon Rios
Keyword(s):  
Dft Calculations ◽  
Secondary Amine ◽  
Ring Opening ◽  
Synergistic Catalysis ◽  
Mechanistic Insight ◽  
Amine Catalysis

An enantioselective synergistic cascade cyclopropanation/NHC catalyzed ring opening has been reported. DFT calculations have been performed to confirm the mechanism.

scholarly journals The crucial roles of guest water in a biocompatible coordination network in the catalytic ring-opening polymerization of cyclic esters: a new mechanistic perspective

2020 ◽  
Vol 11 (12) ◽  
pp. 3345-3354 ◽  
Author(s):  
Sheng-Chun Chen ◽  
Fei-Hang Zhang ◽  
Kun-Lin Huang ◽  
Feng Tian ◽  
Zhi-Hui Zhang ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclic Esters ◽  
Polymerization Mechanism ◽  
Synergistic Catalysis ◽  
Coordination Network ◽  
Coordination Framework ◽  
Acid Centers ◽  
Brønsted And Lewis Acid

A new ring-opening polymerization mechanism is unveiled based on synergistic catalysis involving Brønsted and Lewis acid centers in a coordination framework.

Synergistic catalysis-induced ring-opening reactions of 2-substituted 3,4-dihydropyrans with α-oxoketene dithioacetals

2015 ◽  
Vol 5 (1) ◽  
pp. 234-245 ◽  
Author(s):  
Changhui Liu ◽  
Amir Taheri ◽  
Bingbing Lai ◽  
Yanlong Gu
Keyword(s):  
Ring Opening ◽  
Synergistic Catalysis ◽  
Ring Opening Reactions

Synergistic catalysis enables ring-opening reactions of 2-substituted 3,4-dihydropyrans with α-oxoketene dithioacetals to proceed very well.

Amino-functional polyethers: versatile, stimuli-responsive polymers

2020 ◽  
Vol 11 (24) ◽  
pp. 3940-3950 ◽  
Author(s):  
Patrick Verkoyen ◽  
Holger Frey
Keyword(s):  
Ring Opening ◽  
Review Article ◽  
Stimuli Responsive ◽  
New Class ◽  
Stimuli Responsive Polymers ◽  
Responsive Polymers

Amino-functional polyethers have emerged as a new class of “smart”, i.e. pH- and thermoresponsive materials. This review article summarizes the synthesis and applications of these materials, obtained from ring-opening of suitable epoxide monomers.

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