N-Heterocyclic Carbene-Catalyzed Radical Ring-Opening Acylation of Oxime Esters with Aldehydes

2021 ◽  
Author(s):  
Zhihao Zhang ◽  
Xin Zou ◽  
Zhenjiang Li ◽  
Yu Gao ◽  
Yuanyuan Qu ◽  
...  
Keyword(s):  
Ring Opening ◽  
Cross Coupling ◽  
Radical Ring ◽  
Easy Operation

A cross-coupling of cycloketone oxime esters with aldehydes catalyzed by N-heterocyclic carbene via radical pathway was established. This modular protocol features easy operation, no external oxidants or reductants, and a...

Design and synthesis of 1,8-Naphthalimide Functionalized Benzothiadiazoles

2021 ◽  
Author(s):  
Rajneesh Misra ◽  
Yogjivan Rout
Keyword(s):  
Ring Opening ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Design And Synthesis ◽  
Cross Coupling Reaction ◽  
Ring Opening Reaction

A series of multi acceptor based push-pull derivatives BTD2–BTD5 were designed and synthesized via Pd-catalyzed Sonogashira cross-coupling reaction followed by [2+2] cycloaddition–electrocyclic ring-opening reaction in which benzothiadiazole (BTD, A1), naphthalimide...

TiCp2Cl-Catalyzed Living Radical and Ring Opening Polymerizations Initiated from Epoxides and Aldehydes in the Synthesis of Linear, Graft and Branched Polymers

2004 ◽  
Vol 856 ◽  
Author(s):  
Alexandru D. Asandei ◽  
Isaac W. Moran ◽  
Gobinda Saha ◽  
Yanhui Chen
Keyword(s):  
Electron Transfer ◽  
Ring Opening ◽  
Glycidyl Methacrylate ◽  
Ring Opening Polymerization ◽  
Branched Polymers ◽  
Single Electron Transfer ◽  
Radical Ring ◽  
Polymer Architectures ◽  
Complex Polymer

ABSTRACTTi(III)Cp2Cl-catalyzed radical ring opening (RRO) of epoxides or single electron transfer (SET) reduction of aldehydes generates Ti alkoxides and carbon centered radicals which add to styrene, initiating a radical polymerization. This polymerization is mediate in a living fashion by the reversible termination of growing chains with the TiCp2Cl metalloradical. In addition, polymers or monomers containing pendant epoxide groups (glycidyl methacrylate) can be used as substrates for radical grafting or branching reactions by self condensing vinyl polymerization. In addition, Ti alkoxides generated in situ by both epoxide RRO and aldehyde SET initiate the living ring opening polymerization of ε-caprolactone. Thus, new initiators and catalysts are introduced for the synthesis of complex polymer architectures.

Radical Ring-Opening Copolymerization of 2-Methylene 1,3-Dioxepane and Methyl Methacrylate:  Experiments Originally Designed To Probe the Origin of the Penultimate Unit Effect

1999 ◽  
Vol 32 (5) ◽  
pp. 1332-1340 ◽  
Author(s):  
G. Evan Roberts ◽  
Michelle L. Coote ◽  
Johan P. A. Heuts ◽  
Leesa M. Morris ◽  
Thomas P. Davis
Keyword(s):  
Methyl Methacrylate ◽  
Ring Opening ◽  
Radical Ring

Scope and limitations of the nitroxide-mediated radical ring-opening polymerization of cyclic ketene acetals

2013 ◽  
Vol 4 (17) ◽  
pp. 4776 ◽  
Author(s):  
Antoine Tardy ◽  
Vianney Delplace ◽  
Didier Siri ◽  
Catherine Lefay ◽  
Simon Harrisson ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Radical Ring ◽  
Cyclic Ketene Acetals ◽  
Ketene Acetals

Copper-mediated controlled radical ring-opening polymerization (RROP) of a vinylcycloalkane

2008 ◽  
pp. 3049 ◽  
Author(s):  
Nikhil Kumar Singha ◽  
Amalin Kavitha ◽  
Prodip Sarker ◽  
Stephen Rimmer
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Radical Ring

Free-radical ring-opening polymerization of 2-(o-chlorophenyl)-4-methylene-1,3-dioxolane

1993 ◽  
Vol 30 (1) ◽  
pp. 7-12 ◽  
Author(s):  
Simona Morariu ◽  
Emil C. Buruiana ◽  
Bogdan C. Simionescu
Keyword(s):  
Free Radical ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Radical Ring
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