Works matching DE "UMPOLUNG"

Results: 237

Copper‐Mediated N‐Trifluoromethylation of O‐Benzoylhydroxylamines.

Published in:

Chemistry - A European Journal, 2024, v. 30, n. 6, p. 1, doi. 10.1002/chem.202303314

By:

Fleetwood, Thomas D.;
Kerr, William J.;
Mason, Joseph

Publication type:

Article

Spectroscopic and Computational Study of the Organocatalytic Umpolung of Bromocations: An Accelerated Stereoselective Dibromination Protocol**.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 45, p. 1, doi. 10.1002/chem.202300675

By:

Panda, Jeetendra;
Sahoo, Jigyansa;
Dutta, Juhi;
Biswal, Himansu Sekhar;
Sahoo, Gokarneswar

Publication type:

Article

One‐Pot Synthesis of Diverse 1,4‐[60]Fullerephenols via Three‐Component Umpolung Cascade Coupling of Phenols, C60, and Nucleophiles.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 35, p. 1, doi. 10.1002/chem.202300391

By:

Zhang, Jun‐Xiang;
Wu, Yuan‐Ze;
Chen, Dong‐Mei;
Xuan, Jun;
Li, Fei

Publication type:

Article

Exploring the Lewis Acidity and Reactivity of Neutral Pentacoordinate Dithienophospholes.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 32, p. 1, doi. 10.1002/chem.202300173

By:

Asok, Nayanthara;
Zondag, Benjamen A.;
Pradhan, Ekadashi;
Odagwe, Mary;
LeBlanc, Jesse;
Walsh, Joshua C.;
Bodwell, Graham J.;
Zeng, Tao;
Baumgartner, Thomas

Publication type:

Article

An Umpolung Approach to Acyclic 1,4‐Dicarbonyl Amides via Photoredox‐Generated Carbamoyl Radicals.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 28, p. 1, doi. 10.1002/chem.202300403

By:

Williams, Jason D.;
Leach, Stuart G.;
Kerr, William J.

Publication type:

Article

A Simple Four‐Step Synthesis of the Potato Alkaloid Demissidine from the Common Sapogenin Tigogenin.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 20, p. 1, doi. 10.1002/chem.202203314

By:

Baj, Aneta;
Kaewnok, Nirawit;
Rivas‐Loaiza, Juan A.;
Szymańska, Magdalena;
Witkowski, Stanisław;
Wojtkielewicz, Agnieszka;
Morzycki, Jacek W.

Publication type:

Article

Oxidative N‐Heterocyclic Carbene Catalysis.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 4, p. 1, doi. 10.1002/chem.202202467

By:

De Risi, Carmela;
Brandolese, Arianna;
Di Carmine, Graziano;
Ragno, Daniele;
Massi, Alessandro;
Bortolini, Olga

Publication type:

Article

Divergent Copper‐salt‐controlled Reactions of Donor‐Acceptor Cyclopropanes and N‐Fluorobenzene Sulfonimide: Access to the 1,3‐Haloamines and Aminoindanes.

Published in:

Chemistry - A European Journal, 2023, v. 29, n. 3, p. 1, doi. 10.1002/chem.202202544

By:

Liu, Lingyan;
Wang, Xiao;
Xiao, Weiguo;
Chang, Weixing;
Li, Jing

Publication type:

Article

Umpolung Reactivity of Imine Ester: Visible‐Light Mediated Transfer Hydrogenation of α‐Aryl Imino Esters by Phenylsilane and Water.

Published in:

Chemistry - A European Journal, 2022, v. 28, n. 68, p. 1, doi. 10.1002/chem.202202460

By:

Wu, Wei;
Zhao, HengYuan;
Chen, Jingchao;
Zhang, FuQin;
Fan, Baomin

Publication type:

Article

Water Reduction and Dihydrogen Addition in Aqueous Conditions With ansa‐Phosphinoborane.

Published in:

Chemistry - A European Journal, 2022, v. 28, n. 61, p. 1, doi. 10.1002/chem.202201927

By:

Sorochkina, Kristina;
Chernichenko, Konstantin;
Zhivonitko, Vladimir V.;
Nieger, Martin;
Repo, Timo

Publication type:

Article

An Expedient Method for the Umpolung Coupling of Enols with Heteronucleophiles**.

Published in:

Chemistry - A European Journal, 2022, v. 28, n. 44, p. 1, doi. 10.1002/chem.202201000

By:

García‐Vázquez, Víctor;
Carretero Cerdán, Alba;
Sanz‐Marco, Amparo;
Gómez‐Bengoa, Enrique;
Martín‐Matute, Belén

Publication type:

Article

Formal Umpolung Addition of Phosphites to 2‐Azaaryl Ketones under Chiral Brønsted Base Catalysis: Enantioselective Protonation Utilizing [1,2]‐Phospha‐Brook Rearrangement.

Published in:

Chemistry - A European Journal, 2022, v. 28, n. 42, p. 1, doi. 10.1002/chem.202201240

By:

Kondoh, Azusa;
Hirozane, Takayuki;
Terada, Masahiro

Publication type:

Article

Peptide Cyclization Mediated by Metal‐Free S‐Arylation: S‐Protected Cysteine Sulfoxide as an Umpolung of the Cysteine Nucleophile.

Published in:

Chemistry - A European Journal, 2021, v. 27, n. 56, p. 14092, doi. 10.1002/chem.202102420

By:

Kobayashi, Daishiro;
Kohmura, Yutaka;
Sugiki, Toshihiko;
Kuraoka, Eisuke;
Denda, Masaya;
Fujiwara, Toshimichi;
Otaka, Akira

Publication type:

Article

Pd/Cu Dual‐Catalyzed Asymmetric Synthesis of Highly Functional All‐Carbon Quaternary Stereocenters from Vinyl Carbonates.

Published in:

Chemistry - A European Journal, 2021, v. 27, n. 39, p. 10107, doi. 10.1002/chem.202100677

By:

Xue, Sijing;
Lücht, Alexander;
Benet‐Buchholz, Jordi;
Kleij, Arjan W.

Publication type:

Article

Breslow Intermediates (Amino Enols) and Their Keto Tautomers: First Gas‐Phase Characterization by IR Ion Spectroscopy.

Published in:

Chemistry - A European Journal, 2021, v. 27, n. 8, p. 2662, doi. 10.1002/chem.202003454

By:

Paul, Mathias;
Peckelsen, Katrin;
Thomulka, Thomas;
Martens, Jonathan;
Berden, Giel;
Oomens, Jos;
Neudörfl, Jörg‐M.;
Breugst, Martin;
Meijer, Anthony J. H. M.;
Schäfer, Mathias;
Berkessel, Albrecht

Publication type:

Article

An Apparent Umpolung Reactivity of Indole through [Au]‐Catalysed Cyclisation and Lewis‐Acid‐Mediated Allylation.

Published in:

Chemistry - A European Journal, 2020, v. 26, n. 71, p. 17171, doi. 10.1002/chem.202003441

By:

Shinde, Mahesh H.;
Ramana, Chepuri V.

Publication type:

Article

Electrophilic and Nucleophilic Aromatic Substitutions are Mechanistically Similar with Opposite Polarity.

Published in:

Chemistry - A European Journal, 2020, v. 26, n. 67, p. 15346, doi. 10.1002/chem.202003770

By:

Mąkosza, Mieczysław

Publication type:

Article

One Terminal Guanosine Flip of Intramolecular Parallel G‐Quadruplex: Catalytic Enhancement of G‐Quadruplex/Hemin DNAzymes.

Published in:

Chemistry - A European Journal, 2020, v. 26, n. 39, p. 8631, doi. 10.1002/chem.202001462

By:

Cao, Yanwei;
Li, Wenjing;
Gao, Tian;
Ding, Pi;
Pei, Renjun

Publication type:

Article

A Sequential Umpolung/Enzymatic Dynamic Kinetic Resolution Strategy for the Synthesis of γ‐Lactones.

Published in:

Chemistry - A European Journal, 2020, v. 26, n. 26, p. 5794, doi. 10.1002/chem.202000747

By:

Maskeri, Mark A.;
Schrader, Malte L.;
Scheidt, Karl A.

Publication type:

Article

Palladium-Catalyzed C−H Arylation of α,β-Unsaturated Imines: Catalyst-Controlled Synthesis of Enamine and Allylic Amine Derivatives.

Published in:

Angewandte Chemie, 2016, v. 128, n. 8, p. 2875, doi. 10.1002/ange.201509757

By:

Li, Minyan;
González ‐ Esguevillas, María;
Berritt, Simon;
Yang, Xiaodong;
Bellomo, Ana;
Walsh, Patrick J.

Publication type:

Article

Direct Umpolung of Glycals and Related 2,3-Unsaturated N-Acetylneuraminic Acid Derivatives Using Samarium Diiodide.

Published in:

Angewandte Chemie, 2014, v. 126, n. 24, p. 6298, doi. 10.1002/ange.201402891

By:

Le, Tien Xuan;
Papin, Caroline;
Doisneau, Gilles;
Beau, Jean-Marie

Publication type:

Article

Bis(amino)cyclopropenylidenes as Organocatalysts for Acyl Anion and Extended Umpolung Reactions.

Published in:

Angewandte Chemie, 2013, v. 125, n. 48, p. 12883, doi. 10.1002/ange.201307167

By:

Wilde, Myron M. D.;
Gravel, Michel

Publication type:

Article

DP-internal Inversion and Negative Polarity: Latin aliquis and its Romance Descendants.

Published in:

Probus: International Journal of Latin & Romance Linguistics, 2020, v. 32, n. 2, p. 271, doi. 10.1515/probus-2020-0005

By:

Gianollo, Chiara

Publication type:

Article

莺歌海盆地乐东区深层暗点型目标敏感属性优化方法.

Published in:

Natural Gas Geoscience, 2019, v. 30, n. 3, p. 407, doi. 10.11764/j.issn.1672-1926.2018.12.022

By:

刘仕友;
李洋森;
周凡;
孙万元;
付琛

Publication type:

Article

盖层厚度对天然气封闭能力的实验分析.

Published in:

Natural Gas Geoscience, 2019, v. 30, n. 3, p. 322, doi. 10.11764/j.issn.1672-1926.2018.11.012

By:

林潼;
王孝明;
张璐;
曾旭;
张帅;
程煜宗

Publication type:

Article

Emoji, Text, and Sentiment Polarity Detection Using Natural Language Processing.

Published in:

Information (2078-2489), 2023, v. 14, n. 4, p. 222, doi. 10.3390/info14040222

By:

Gupta, Shelley;
Singh, Archana;
Kumar, Vivek

Publication type:

Article

Differential Far-End Crosstalk Mitigation with Polarity Reversal.

Published in:

Progress in Electromagnetics Research Letters, 2019, v. 86, p. 53, doi. 10.2528/pierl19043004

By:

Xiaofeng Song;
Deheng Li

Publication type:

Article

Studies on Pumiliotoxin A Alkaloids: An Approach to Preparing the Indolizidinic Core by Intramolecular Diastereoselective N-Heterocyclic Carbene Catalyzed Benzoin Reaction.

Published in:

European Journal of Organic Chemistry, 2016, v. 2016, n. 11, p. 1972, doi. 10.1002/ejoc.201600172

By:

Correia, José Tiago M.;
Acconcia, Laís V.;
Coelho, Fernando

Publication type:

Article

Metal-Free Direct Dehydroxytrifluoromethylthiolation of Alcohols via the Umpolung Reactivity of Trifluoromethanesulfenamides.

Published in:

European Journal of Organic Chemistry, 2016, v. 2016, n. 11, p. 1955, doi. 10.1002/ejoc.201600197

By:

Glenadel, Quentin;
Tlili, Anis;
Billard, Thierry

Publication type:

Article

Room-Temperature Alkynylation of Phosphine Oxides with Copper Acetylides: Practical Synthesis of Alkynylphosphine Oxides.

Published in:

European Journal of Organic Chemistry, 2016, v. 2016, n. 4, p. 633, doi. 10.1002/ejoc.201501440

By:

Gérard, Phidéline;
Veillard, Romain;
Alayrac, Carole;
Gaumont, Annie‐Claude;
Evano, Gwilherm

Publication type:

Article

Vicinal Functionalization of N-Alkoxyenamines: Tandem Umpolung Phenylation-Nucleophilic Addition Reaction Sequence.

Published in:

European Journal of Organic Chemistry, 2015, v. 2015, n. 18, p. 3899, doi. 10.1002/ejoc.201500308

By:

Sato, Shohei;
Takeda, Norihiko;
Miyoshi, Tetsuya;
Ueda, Masafumi;
Miyata, Okiko

Publication type:

Article

Synthesis of Multisubstituted Dihydroquinoxaline Derivatives by Tandem N-Alkylation and Addition Reactions of 3-Oxoquinoxaline-2-carboxylates.

Published in:

European Journal of Organic Chemistry, 2015, v. 2015, n. 15, p. 3327, doi. 10.1002/ejoc.201500225

By:

Miyamaru, Satoru;
Umezu, Kazuto;
Ito, Akinori;
Shimizu, Makoto

Publication type:

Article

Umpolung Pd-Catalyzed α-Arylation Reactions in Natural Product Synthesis: Syntheses of (+)-Xestodecalactone A, (-)-Curvularin, (+)-12-Oxocurvularin and (-)-Citreofuran.

Published in:

European Journal of Organic Chemistry, 2015, v. 2015, n. 15, p. 3303, doi. 10.1002/ejoc.201500287

By:

De Joarder, Dripta;
Jennings, Michael P.

Publication type:

Article

Frontispiece: Sulfones as Chemical Chameleons: Versatile Synthetic Equivalents of Small‐Molecule Synthons.

Published in:

Chemistry - A European Journal, 2019, v. 25, n. 48, p. N.PAG, doi. 10.1002/chem.201984862

By:

Trost, Barry M.;
Kalnmals, Christopher A.

Publication type:

Article

From Phosphidic to Phosphonium? Umpolung of the P4‐Bonding Situation in [CpFe(CO)(L)(η1‐P4)]+ Cations (L=CO or PPh3).

Published in:

Chemistry - A European Journal, 2019, v. 25, n. 45, p. 10546, doi. 10.1002/chem.201902075

By:

Riddlestone, Ian M.;
Weis, Philippe;
Martens, Arthur;
Schorpp, Marcel;
Scherer, Harald;
Krossing, Ingo

Publication type:

Article

Catalytic Regio‐ and Stereoselective Alkene Sulfenoamination for 1,4‐Benzothiazine Synthesis.

Published in:

Chemistry - A European Journal, 2019, v. 25, n. 28, p. 6902, doi. 10.1002/chem.201900549

By:

Alom, Nur‐E.;
Kaur, Navdeep;
Wu, Fan;
Saluga, Shannon Jasmine;
Li, Wei

Publication type:

Article

Umpolung at Boron: Ancillary‐Ligand‐Induced Formation of Boron‐Based Donor Ligands from Phosphine‐Boranes.

Published in:

Chemistry - A European Journal, 2018, v. 24, n. 47, p. 12346, doi. 10.1002/chem.201705847

By:

Vondung, Lisa;
Alig, Lukas;
Ballmann, Monika;
Langer, Robert

Publication type:

Article

Organocatalytic Highly Regio- and Enantioselective Umpolung Michael Addition Reaction of α-Imino Esters.

Published in:

Chemistry - A European Journal, 2017, v. 23, n. 52, p. 12749, doi. 10.1002/chem.201703479

By:

Yoshida, Yasushi;
Mino, Takashi;
Sakamoto, Masami

Publication type:

Article

Access to α-Arylglycines by Umpolung Carboxylation of Aromatic Imines with Carbon Dioxide.

Published in:

Chemistry - A European Journal, 2016, v. 22, n. 48, p. 17156, doi. 10.1002/chem.201604623

By:

Guo, Chun ‐ Xiao;
Zhang, Wen ‐ Zhen;
Zhou, Hui;
Zhang, Ning;
Lu, Xiao ‐ Bing

Publication type:

Article

Very Facile Polarity Umpolung and Noncovalent Functionalization of Inorganic Nanoparticles: A Tool Kit for Supramolecular Materials Chemistry.

Published in:

Chemistry - A European Journal, 2015, v. 21, n. 40, p. 14030, doi. 10.1002/chem.201501682

By:

Zeininger, Lukas;
Petzi, Stefanie;
Schönamsgruber, Jörg;
Portilla, Luis;
Halik, Marcus;
Hirsch, Andreas

Publication type:

Article

trans-Symmetric Dynamic Covalent Systems: Connected Transamination and Transimination Reactions.

Published in:

Chemistry - A European Journal, 2015, v. 21, n. 27, p. 9776, doi. 10.1002/chem.201500520

By:

Schaufelberger, Fredrik;
Hu, Lei;
Ramström, Olof

Publication type:

Article

Isostrychnine Synthesis Mediated by Hypervalent Iodine Reagent.

Published in:

Chemistry - A European Journal, 2015, v. 21, n. 21, p. 7713, doi. 10.1002/chem.201500185

By:

Jacquemot, Guillaume;
Maertens, Gaëtan;
Canesi, Sylvain

Publication type:

Article

Trifluoromethylation-Initiated Remote Cross-Coupling of Carbonyl Compounds to Form Carbon-Heteroatom/Carbon Bonds.

Published in:

Chemistry - A European Journal, 2015, v. 21, n. 18, p. 6718, doi. 10.1002/chem.201500629

By:

Huang, Lin;
Zheng, Sheng ‐ Cai;
Tan, Bin;
Liu, Xin ‐ Yuan

Publication type:

Article

Umpolung Synthesis of Diarylmethylamines via Palladium- Catalyzed Arylation of N-Benzyl Aldimines.

Published in:

Advanced Synthesis & Catalysis, 2016, v. 358, n. 12, p. 1910, doi. 10.1002/adsc.201600075

By:

Li, Minyan;
Yucel, Baris;
Jiménez, Jacqueline;
Rotella, Madeline;
Fu, Yue;
Walsh, Patrick J.

Publication type:

Article

Aryl λ3-Iodane-Mediated 6- exo- trig Cyclization to Synthesize Highly Substituted Chiral Morpholines.

Published in:

Advanced Synthesis & Catalysis, 2015, v. 357, n. 13, p. 2788, doi. 10.1002/adsc.201500177

By:

Kishore Vandavasi, Jaya;
Hu, Wan ‐ Ping;
Chandru Senadi, Gopal;
Chen, Hui ‐ Ting;
Chen, Hsing ‐ Yin;
Hsieh, Kuang ‐ Chan;
Wang, Jeh ‐ Jeng

Publication type:

Article

Reversed-Polarity Synthesis of Diaryl Ketones through Palladium-Catalyzed Direct Arylation of 2-Aryl-1,3-dithianes.

Published in:

Advanced Synthesis & Catalysis, 2014, v. 356, n. 17, p. 3659, doi. 10.1002/adsc.201400695

By:

Yucel, Baris;
Walsh, Patrick J.

Publication type:

Article

Synthesis of α-Methylidene-γ-amino Acid Esters from Aldehydes via an Aminative Umpolung Strategy.

Published in:

2014

By:

Xu, Juan;
Chen, Jing;
Yang, Qin;
Ding, Lei;
Liu, Xuliang;
Xu, Dongfang;
Zhao, Baoguo

Publication type:

Other

Evolution of internal solitary waves on the slope-shelf topography in the northern South China Sea.

Published in:

Ocean Dynamics, 2020, v. 70, n. 6, p. 729, doi. 10.1007/s10236-020-01357-5

By:

Wang, Shuya;
Meng, Jing;
Li, Qun;
Chen, Xu

Publication type:

Article

Catalytic asymmetric umpolung reactions of imines.

Published in:

Nature, 2015, v. 523, n. 7561, p. 445, doi. 10.1038/nature14617

By:

Wu, Yongwei;
Hu, Lin;
Li, Zhe;
Deng, Li

Publication type:

Article

Determination and identification of focal mechanism solutions for Himalayan earthquakes from waveform inversion employing ISOLA software.

Published in:

Natural Hazards, 2015, v. 76, n. 1, p. 1163, doi. 10.1007/s11069-014-1540-6

By:

Kumar, Rohtash;
Gupta, S.;
Kumar, Arjun

Publication type:

Article