Results 101 to 110 of about 81,226 (245)

A mechanistic study of the Diels-Alder reaction of isoprene with some substitutes benzalmalononitriles

open access: yes, 1980
This work was a kinetic study of the Diels-Alder reaction of isoprene with variously substituted benzalmalononitriles. Application of the Hammett equation, a linear free energy relationship, to the kinetic rate data yielded a value of 1.31 for rho.
Copp, James D.
core  

A New Chiral Anthracene for the Asymmetric Diels−Alder/Retro-Diels−Alder Sequence

open access: yes, 2016
(−)-(R)-9-(1,2-Dimethoxyethyl)anthracene (8) is successfully employed as a chiral template in the Diels−Alder/retro-Diels−Alder sequence for the preparation of α,β-unsaturated lactams.
Wanlin Yan (2105650)   +4 more
core   +1 more source

Click‐to‐Release Reactivity of Quaternary Anilinium Tetrazines Enables Cascade Assembly of Multifunctional Biomolecular Scaffolds

open access: yesAngewandte Chemie International Edition, EarlyView.
Click chemistry has evolved from making covalent connections to also breaking bonds. Here, a cascade assembly is reported that combines these maneuvers to build multifunctional biomolecular scaffolds in a modular one‐pot reaction. The unifying azide release‐tetrazine hub clicks with a trans‐cyclooctene tag, rapidly liberates N,N‐dimethylaniline to ...
Markus Staudt   +9 more
wiley   +1 more source

Formation of nanoporous materials via mild retro-Diels–Alder chemistry

open access: yes, 2011
Poly(styrene)-block-poly(ethylene oxide) copolymers synthesized via the combination of reversible addition fragmentation chain transfer (RAFT) polymerization and hetero Diels–Alder (HDA) cycloaddition can be cleaved in the solid state by a retro-HDA ...
James P. Blinco   +5 more
core   +1 more source

Multicomponent reactions for DNA‐encoded library construction: Scaffold diversity and reaction engineering strategies

open access: yesBulletin of the Korean Chemical Society, EarlyView.
Abstract DNA‐encoded libraries (DELs) enable large‐scale screening for hit identification, but accessing sp3‐rich, three‐dimensional chemotypes beyond flat, aromatic scaffolds remains challenging. Multicomponent reactions (MCRs) assemble such complexity from simple building blocks in a single step, and reaction‐engineering strategies have extended on ...
Jimin Moon   +3 more
wiley   +1 more source

Enantioselective Diels-Alder Reaction Catalyzed by G-Quadruplex DNA and Its Metalloenzyme

open access: yes, 2012
Enantioselective Diels-Alder Reaction Catalyzed by G-Quadruplex DNA and Its ...
卢胜梅   +6 more
core  

Fluorophobic Acceleration of Diels−Alder Reactions

open access: yes, 2016
Fluorophobic Acceleration of Diels−Alder ...
Kathleen E. Myers (2982246)   +1 more
core   +1 more source

Advances in Sustainable Production of Bio‐Derived 5‐Alkoxymethylfurfural and Levulinate Esters: A Comprehensive Review

open access: yesCarbon Energy, EarlyView.
The present review discusses the advancement in the catalytic synthesis of 5‐alkoxymethylfurfural (AMF) and levulinate esters (LEs) from the aspects of catalytic systems, reaction mechanisms, product isolation, and techno‐economic analysis, supplying valuable insights toward future sustainable and efficient manufacture of AMF and LEs. ABSTRACT The huge
Jun Zhang   +6 more
wiley   +1 more source

Development of Blue‐to‐Near‐Infrared rTCO–Caged Fluorogenic Probes for Click‐to‐Release Monitoring

open access: yesChemistry – A European Journal, EarlyView.
A series of fluorogenic rTCO‐caged click‐to‐release probes was prepared and evaluated both in a cuvette and in live cells. Some of the probes exhibited significant turn‐on and efficient fluorophore release spanning the blue‐to‐NIR region. A significant difference in the performance of the compounds in live cells was observed, highlighting the need for ...
Marek Chovanec   +4 more
wiley   +1 more source

On the Question of the Course of the Hetero Diels–Alder Reactions Between N-(2,2,2-Trichloroethylidene)Carboxamides and Dicyclohexylcarbodiimide: A New Case of the Stepwise Zwitterionic Cycloaddition Process

open access: yesMolecules
The regioselectivity and the molecular mechanism of the Diels–Alder reactions between N-(2,2,2-trichloroethylidene)carboxamides and dicyclohexylcarbodiimide were explored based on the ωB97xd/6-311G(d) (PCM) calculations.
Przemysław Woliński   +3 more
doaj   +1 more source

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