Results 91 to 100 of about 2,093,219 (268)

Taming a Blue Gas—Structure and Chemistry of Hexafluorothioacetone

Angewandte Chemie International Edition, EarlyView.
Hexafluorothioacetone (1), a blue gas at r.t., was synthesized by flash vacuum pyrolysis of its cyclic dimer at 660°C. We discuss fundamental properties of elusive 1, including single‐crystal structure and nuclear magnetic resonance spectroscopy, despite its tendency to dimerize even at –74°C.
Hennes Günther, Antti J. Karttunen, Xiulan Xie, Frank Tambornino   +3 more
wiley   +1 more source

Anthracen- und Anthrachinon-Oligomere mit ortho-Cyclophanverknüpfung durch wiederholte Diels-Alder-Reaktion von 1,2,5,6-Tetra-exo-methylencyclooctan

CHIMIA, 1988
The design of efficient organic electron acceptors requires oligomeric and polymeric hydrocarbons in which separate redox-active units are connected in a sterically variable fashion.
Manfred Wagner, Werner Wohlfarth, Klaus Müllen   +2 more
doaj   +1 more source

Activation of Metal Complexes With Ultrasound Waves for Targeted Anticancer Therapy

Angewandte Chemie International Edition, EarlyView.
Ultrasound enables non‐invasive activation of metal‐based therapeutics deep within tumors. Acoustic cavitation can drive sonodynamic reactive oxygen species generation or mechanochemical metal–ligand bond dissociation, enabling controlled release of bioactive payloads.
Félix Grosjean, Nicolás Montesdeoca, Gilles Berger, Johannes Karges   +3 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

Molecules
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, Karolina Zawadzińska-Wrochniak, Ewa Dresler, Radomir Jasiński   +3 more
doaj   +1 more source

Preparation and Reaction Chemistry of Novel Silicon-Substituted 1,3-Dienes

Molecules, 2015
2-Silicon-substituted 1,3-dienes containing non transferrable groups known to promote transmetallation were prepared by Grignard chemistry and enyne metathesis.
Partha P. Choudhury, Mark E. Welker
doaj   +1 more source

Synthesis of 3-Alkenyl-1-azaanthraquinones via Diels-Alder and Electron Transfer Reactions

Molecules, 2002
A convenient route to 3-alkenyl-1-azaanthraquinones via a hetero Diels-Alder reaction between an azadiene and naphthoquinone, a free radical chlorination and an electron transfer reaction is reported.
Patrice Vanelle, Vincent Rémusat, Pascal Rathelot   +2 more
doaj   +1 more source

Diels-Alder reactions of imino dienophiles

, 2016
Kutatómunkám során célul tűztük ki N-toziloxim és N-szulfonil imin származékok előállítását benzaldehid származékokból kiindulva, majd ezen vegyületek aza-Diels-Alder reakcióit kívántam vizsgáltam tetrahidropiridin származékok előállítására. A lehetséges
Auksz, Flóra
core  

Transformative Masked Ortho‐Quinone Chemistry: From Direct Guaiacol Activation to Lignin‐Based Adhesives

Angewandte Chemie International Edition, EarlyView.
Renewable guaiacols are rapidly oxidized by phenyliodine(III)diacetate to masked ortho‐quinones, giving a new class of monomers that undergo selective Michael‐type polyaddition with multithiols to from thiol‐guaiacol connectivity‐bearing polymers. The activation applies to discrete monomers and directly to lignin, enabling two‐component adhesives that ...
Dominik P. Hoch, Keven Walter, Oliver Sipura, Jana Falkenhagen, Xinyang Peng, Leon Gerndt, Hamy Nguyen, Hans G. Börner   +7 more
wiley   +1 more source

High-level Computational Study of the Site-, Facial- and Stereoselectivities for the Diels-Alder Reaction Between o-Benzoquinone and Norbornadiene

Molecules, 2000
Ab initio and DFT quantum chemical calculations have been applied to a study of the Diels-Alder reaction of o-benzoquinone as diene and norbornadiene as dienophile.
Ronald N. Warrener, Martin R. Johnston, Davor Margetic   +2 more
doaj   +1 more source

Expanding the scope of cyclopropene reporters for the detection of metabolically engineered glycoproteins by Diels–Alder reactions

Beilstein Journal of Organic Chemistry, 2014
Monitoring glycoconjugates has been tremendously facilitated by the development of metabolic oligosaccharide engineering. Recently, the inverse-electron-demand Diels–Alder reaction between methylcyclopropene tags and tetrazines has become a popular ...
Anne-Katrin Späte, Verena F. Schart, Julia Häfner, Andrea Niederwieser, Thomas U. Mayer, Valentin Wittmann   +5 more
doaj   +1 more source