Results 231 to 240 of about 153,572 (317)

Reaction of aromatic N-oxides with dipolarophiles. III. Cycloadditions of substituted phenyl isocyanates to 3,5-dimethyl and 3,5-dibromopyridine N-oxides and X-ray crystal structures of the isomeric cycloadducts.

, 1979
T. HISANO, Masataka Ichikawa, T. MATSUOKA, Hisao Hagiwara, K. MURAOKA, Tetsuya Komori, Kazunobu Harano, Yoshiteru Ida, Arild Christensen   +8 more
openalex   +2 more sources

From Oxygen to Tellurium: The Impact of the Chalcogen on Nucleophilicities and Basicities of Isochalcogenourea Catalysts

Angewandte Chemie International Edition, EarlyView.
Incorporation of different chalcogen atoms allows for the fine‐tuning of nucleophilicity and basicity of commonly used isochalcogenourea organocatalyst scaffolds. Kinetic and thermodynamic descriptors for the molecular properties of the catalysts are introduced as tools to predict their efficiency and tested in acyl transfer and allenoate activation ...
Lotte Stockhammer, Kevin Kasten, Andreas Eitzinger, Lukas S. Vogl, Magdalena Piringer, David Weinzierl, Armin R. Ofial, Andrew D. Smith, Mario Waser   +8 more
wiley   +1 more source

On the Question of the Regio-Orientation, Stereo-Orientation and Molecular Mechanism in the Cascade Cycloaddition/Rearrangement/Elimination Processes Leading to Nitro-Substituted Thiopyran Analogs: DFT Computational Study. [PDF]

Int J Mol Sci
Sadowski M, Dresler E, Jasiński R.
europepmc   +1 more source

Cycloaddition reactions of bridgehead enones

, 1988
George A. Kraus, Y.‐S. HON, James Sy, Jeff Raggon   +3 more
openalex   +2 more sources

Aminocatalytic enantioselective [2 + 2] cycloaddition of Bicyclo[1.1.0]butanes and α,β-unsaturated aldehydes. [PDF]

Chem Sci
Bitsch RS, Marcantonio E, Obregón EB, Kocemba IR, Faghtmann J, Jørgensen KA.   +5 more
europepmc   +1 more source

A new ring transformation of thiazolo(4,5-g)quinazoline 3-oxides into (1,4)thiazino(3,2-g)quinazolines by the 1,3-dipolar cycloaddition reaction.

, 1986
Hashime Kanazawa, Zenzo Tamura, K. SENGA
openalex   +2 more sources

The Uncatalyzed Cycloaddition of a Siloxydiene to N-Acylimines. The Synthesis of 4-Pyridones

, 1984
Hongwei Cao, Rudolph A. Abramovich, Lames R. Stowers   +2 more
openalex   +1 more source

Recent advances in multicomponent synthesis of 5-substituted 1<i>H</i>-tetrazoles from aldehydes: catalytic methods and green chemistry approaches. [PDF]

RSC Adv
Hsu CY, Altalbawy FMA, Asiri M, Abosaoda MK, Ballal S, Singh A, Nanda A, Ray S, Hussein AR, Baqir SJ.   +9 more
europepmc   +1 more source

Chemoenzymatic total synthesis of the antibiotic (-)-13-deoxytetrodecamycin using the Diels-Alderase TedJ. [PDF]

Chem Sci
Russell SJ, Back CR, Perry C, Cheung KA, Maschio L, Charlton SN, Lees NR, Manzo-Ruiz M, Hayes MA, van der Kamp MW, Race PR, Willis CL.   +11 more
europepmc   +1 more source