Results 91 to 100 of about 41,109 (281)
Molecules, 2012 A series of novel dispirooxindoles have been synthesized through three-component 1,3-dipolar cycloaddition of azomethine ylides generated in situ by the decarboxylative condensation of isatin and an α-amino acid with the dipolarophile 5-benzylidene-1,3 ...
Yucheng Wang +9 more
doaj +1 more source
Cycloaddition Functionalizations to Preserve or Control the Conductance of Carbon Nanotubes [PDF]
, 2006 We identify a class of covalent functionalizations that preserves or controls the conductance of single-walled metallic carbon nanotubes. [2+1] cycloadditions can induce bond cleaving between adjacent sidewall carbons, recovering in the process the $sp^2$ hybridization and the ideal conductance of the pristine tubes.
arxiv +1 more source
Regioselective and Enantioselective Nitrone Cycloadditions to Alkynones. [PDF]
, 2010 There has been a need in agriculture, medicine, and organic chemistry for enantiopure isoxazolines. A direct method for their synthesis is from the cycloaddition of 1,3-dipoles and alkynes.
Dunkle, Kelsey Lynn
core
Intramolecular Azide to Alkene Cycloadditions for the Construction of Pyrrolobenzodiazepines and Azetidino-Benzodiazepines [PDF]
, 2014 The coupling of proline- and azetidinone-substituted alkenes to 2-azidobenzoic and 2-azidobenzenesulfonic acid gives precursors that undergo intramolecular azide to alkene 1,3-dipolar cycloadditions to give imine-, triazoline- or aziridine-containing ...
Antonow +9 more
core +2 more sources
(S)-(-)-Limonene Derivatives Containing (1H-1,2,3-Triazol-4-yl)methyl 4-Bromobenzoate
Molbank, 2011 The synthesis of (S)-(-)-limonene derivatives containing (1H-1,2,3-triazol-4-yl)methyl 4-bromobenzoate were obtained by epoxidation, azidolysis and Huisgen’s 1,3-dipolar cycloaddition.
Guillermo Valdomir, Danilo Davyt
doaj +1 more source
Metal-catalyzed 1,3-dipolar cycloaddition reactions of nitrile oxides.
Organic and biomolecular chemistry, 2018 In the present review advances in the metal-catalyzed 1,3-dipolar cycloaddition reactions of nitrile oxides, mainly in the last decade, will be presented and discussed. An overview on the structure, preparation, dimerization and related reactions as well
Silvia Roscales, J. Plumet
semanticscholar +1 more source
1,3-Dipolar cycloaddition of diazomethane with a chiral azlactone
Tetrahedron Letters, 1994 AbstractChemInform 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. The original article is trackable via the “References” option.
Cativiela, Carlos +3 more
openaire +4 more sources
Intermolecular 1,3-dipolar cycloadditions of azomethine imines [PDF]
Arkivoc, 2006 Dipolar cycloadditions of azomethine imines, formed in situ from aldehydes and N1-alkyl-N2-acylhydrazines, with electron-deficient dipolarophiles produce pyrazolidines: mono-substituted dipolarophiles afford principally 4-substituted pyrazolidines.
Jones, Raymond C.F. +2 more
openaire +4 more sources
Angewandte Chemie International Edition, Accepted Article.A cationic Ir(I)‐complex modified with the chiral diphosphine DM‐SEGPHOS mediates the hydroalkylation of diverse α‐methyl styrenes with N‐aryl glycine derivatives. The processes occur with complete branched selectivity and high enantioselectivity. Styrenes possessing higher α‐alkyl substituents also participate to provide the targets with moderate to ...
Fenglin Hong +4 more
wiley +1 more source
Ferrocene-derived P,N ligands : synthesis and application in enantioselective catalysis [PDF]
, 2013 Due to their unique steric and electronic properties, air-stability and modular structure, chiral hybrid P,N-ferrocenyl ligands play a prominent role in the field of asymmetric catalysis.
Noël, Timothy, Van der Eycken, Johan
core +1 more source