Results 101 to 110 of about 2,240,218 (271)

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

Catalytic enantioselective synthesis of 2,6-disubstituted dihydropyrones by hetero-Diels-Alder reaction using chiral BINOL-Ti(IV) complex [PDF]

, 2002
Highly efficient enantioselective synthesis of optically active 2,6-disubstituted dihydropyrones was easily available by hetero-Diels-Alder reaction of aldehydes in presence of 20 mol% (R)-(+)-BINOL-Ti(IV) complex under mild reaction conditions.
Jiang, YZ, Huang, YZ, Wang, B, Feng, XM, Sichuan Univ, Fac Chem, Sichuan Key LGreen Chem & Technol, Chengdu 610064, Peoples R China., Feng, XM, Zhang, GL, Bin Wang, Yaozhong Jiang, Guolin Zhang, Xiaoming Feng, Yaozong Huang   +10 more
core   +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

Synthesis of a Stable Hydrophilic trans‐Cyclooctene Amino Acid Unlocks Fast Bioorthogonal Click Chemistry for the Generation of Antibody‐Drug Conjugates by Genetic Code Expansion

Angewandte Chemie International Edition, EarlyView.
A novel trans‐cyclooctene (TCO) based noncanonical amino acid (ncAA) is reported, characterized by high hydrophilicity and remarkable stability to trans‐cis isomerization. Its incorporation via genetic code expansion into an antibody and subsequent conjugation resulted in a highly efficacious antibody‐drug conjugate (ADC).
Georgi R. Genov, Dina Osmanović, Ines Bašić, Christine Koehler, Paul F. Sauter   +4 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

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

Angewandte 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, Christian B. M. Poulie, Andreas Löffler, Peter R. Meinig, Riley J. Deutsch‐Williams, Barbara Herrmann, Ralph Weissleder, Hannes Mikula, Jonathan C. T. Carlson, Matthias M. Herth   +9 more
wiley   +1 more source

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

Bulletin 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, Hyemin Yoon, Kang Ju Lee, Hyun Jin Kim   +3 more
wiley   +1 more source