Results 31 to 40 of about 55,078 (177)

Synthesis and palladium-catalysed isomerisation of fused polycyclic tetrahydrofurans : efficient and stereoselective one-pot domino construction of functionalised bridged bicyclo[n.2.1] ring systems

, 2009
International audienceA new one-pot domino reaction for a general entry to functionalised bridged bicyclo[n.2.1] ring systems from α,α'-diactivated cyclic ketones and trans-1,4-dihalides is described.
Bensa, David, Blondeau, Fabien, Constantieux, Thierry, Rodriguez, Jean, Roger, Pierre-Yves   +4 more
core   +4 more sources

Methyl on the Bridge: 2‐Methyl Propellane as Precursor for 1,3‐Substituted 2‐Methylated Bicyclo[1.1.1]Pentanes

Chemistry – A European Journal, EarlyView.
The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve, Mariana Gomes Manso, Tibo Van Eeckhoorn, Mark E. Light, Bruno Linclau   +4 more
wiley   +1 more source

ChemInform Abstract: 3‐Trimethylsilylbicyclo[3.2.1]oct‐2‐ene in the Synthesis of Functionalized Bicyclo[3.2.1]octane Systems [PDF]

, 2002
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option ...
Gopalpur Nagendrappa, ., Govindagouda, S.Patil.   +1 more
core   +1 more source

Transannular O‐Heterocyclization Reactions of Cyclododeca‐1,5,9‐triene Derivatives: A New Concept for the Preparation of Key Intermediates for Total Syntheses of Annonaceous Acetogenins

Helvetica Chimica Acta, EarlyView.
Four stereogenic centers are formed diastereoselectively in one step from a cyclic (E,E)‐1,5‐diene system using an electrophilic addition reaction. Subsequent ozonolytic cleavage of the intact Z‐double bond, followed by intramolecular nucleophilic substitution, yields an octahydroterfurandione with a threo,cis,threo configuration, an arrangement found ...
Holger Schimanski, André Streiter, Micheline May, Oliver Mimkes, Johannes van Kempen, Constantin Daniliuc, Günter Haufe   +6 more
wiley   +1 more source

Additions- und Cycloadditionsreaktionen von Allenyl-Kationen mit cyclischen 1,3-Dienen [PDF]

, 1982
Die Zinkchlorid-katalysierte Umsetzung von 1,3-Cyclohexadien oder 1,3-Cycloheptadien mit den Propargylchloriden 3 liefert Bicyclo[2.2.2]octene 1 bzw. Bicyclo[3.2.2]nonene 2, deren Bildung durch stufenweise [2 + 4]-Cycloadditionen intermediärer Allenyl ...
Allinger, Allinger, Derocque, Grob, Leffler, Levy, Mayr, Mayr, Mayr, Mayr, Pfeifer, Schiavelli, Schleyer, Stang, Stothers, Summerville   +15 more
core   +1 more source

Light‐Enabled [2σ + 2π] Cycloadditions of Bicyclo[1.1.0]butanes and Alkenes by Ti‐Salen Photocatalysis

ChemistryEurope, Volume 4, Issue 1, January 2026.
This study reports an unprecedented Ti(Salen)‐catalyzed [2σ+2π] photocycloaddition of bicyclo[1.1.0]butanes and alkenes, featuring broad substrate scope, excellent functional group tolerance, scalability, and potential pharmaceutical applications. Notably, this work represents the first application of a Ti(Salen) complex as an efficient photoredox ...
Jinping Xing, Dexia Li, Tianxiang Li, Yang Xu, Haosong Ren, Jun Zheng   +5 more
wiley   +1 more source

Unlocking Biomolecule Modification with Light‐Promoted Photocatalyst‐Free Approaches: Current Tools, Challenges, and Perspectives

ChemistryEurope, Volume 4, Issue 1, January 2026.
This Perspective focuses on photocatalyst‐free, photoinduced modifications of biomolecules, emphasizing transformations mediated by electron donor–acceptor complexes. Mechanistic aspects, current limitations, and future opportunities are discussed, providing insight into the field of bioconjugation.
Milene Hornink, Maria Eduarda C. Thedy, Eugénie Romero, Gary A. Molander   +3 more
wiley   +1 more source

Kohlenwasserstoffverbrückte Komplexe, XXV [PDF]

, 1992
Hydrocarbon-Bridged Complexes, XXV. - C-C Coupling of Anionic Tricarbonyl Manganese Complexes of Cyclic Polyenes with Cationic Tropylium Metal Compounds; Preparation and Structure of (OC)3Mn(-5:6-C7H8-C7H7)M(CO)3, (OC)3Mn(-5:6-C8H10-C7H7)M(CO)3, and (OC ...
Airoldi, Beck, Breimair, Brookhart, Bush, Cope, Dauben, Dunitz, Gaudet, Karplus, King, King, Lehmann, Lehmann, Maltz, Mc Clellan, Munro, Müller, Niemer, Niemer, Niemer, Olgemöller, Pauson, Thompson   +23 more
core   +1 more source

π‐Expanded BODIPYs and Related Analogs as Long‐Wavelength Absorbing Photosensitizers for Green Energy Conversion

ChemNanoMat, Volume 12, Issue 1, January 2026.
The versatile modification capability of BODIPYs and the related analogs with excellent photophysical properties allows chemists to propose photosensitizers applicable to energy‐related materials. This review mainly focuses on the π‐extension strategy for achieving sunlight‐harvesting capabilities. The insights and challenges for future research on red
Yuji Kubo, Masato Ito
wiley   +1 more source

Does Koopmans’ Paradigm for 1-Electron Oxidation Always Hold? Breakdown of IP/E\u3csub\u3eox\u3c/sub\u3e Relationship for \u3cem\u3ep\u3c/em\u3e-Hydroquinone Ethers and the Role of Methoxy Group Rotation [PDF]

, 2016
Koopmans’ paradigm states that electron loss occurs from HOMO, thus forming the basis for the observed linear relationships between HOMO/IP, HOMO/Eox, and IP/Eox.
Boddeda, Anitha, Lindeman, Sergey V., Rathore, Rajendra, Talipov, Marat R.   +3 more
core   +1 more source