Results 91 to 100 of about 28,644 (231)

Covalent Functionalisation of rGO and Nanodiamonds: Complementary Versatility and Applicability of Azomethine Ylide, Nitrile Oxide and Nitrone

ChemPlusChem, Volume 90, Issue 3, March 2025.
1,3‐DCA of nitrone and nitrile oxide to carbon based nanomaterial has been adapted from rGO to yield more stable, unique and biocompatible NDs. This strategy provides an economical, rapid, and efficient method for the production of pure, hydrophilic carbon nanomaterials, which are suitable for a wide range of applications.
Katia Martina, Silvia Tagliapietra, Federica Calsolaro, Andrei Paraschiv, Mirko Sacco, Federico Picollo, Sofia Sturari, Pietro Aprà, Lorenzo Mino, Alessandro Barge, Giancarlo Cravotto   +10 more
wiley   +1 more source

Enantioselective dearomative [3 + 2] cycloadditions of indoles with azomethine ylides derived from alanine imino esters [PDF]

, 2016
Catalytic, enantioselective [3 + 2] cycloadditions of azomethine ylides derived from alanine imino esters with 3-nitroindoles are reported. The dearomative cycloaddition reactions occur in the presence of a catalyst generated in situfrom Cu(OTf)2 and (R)-
Gerten, Anthony, Stanley, Levi, Stanley, Levi   +2 more
core   +3 more sources

Double Strain‐Release (3+3)‐Cycloaddition: Lewis Acid Catalyzed Reaction of Bicyclobutane Carboxylates and Aziridines

Chemistry – A European Journal, Volume 31, Issue 9, February 12, 2025.
We report a Sc(OTf)3‐catalyzed cycloaddition of highly strained bicyclo[1.1.0]butane carboxylates with protected aziridines. In this transformation, highly functionalized 2‐azabiyclo[3.1.1]heptanes are accessed in single step under mild conditions. This is an example of strain‐release driven transformation, where two highly strained rings combine to ...
Malini George, Jasper Mindner, Silas Wittmer, Daniil A. Knyazev, Daniel B. Werz   +4 more
wiley   +1 more source

An efficient and facile access to highly functionalized pyrrole derivatives

Beilstein Journal of Organic Chemistry, 2018
A straightforward and one-pot synthesis of pyrrolo[3,4-c]pyrrole-1,3-diones via Ag(I)-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with N-alkyl maleimide, followed by readily complete oxidation with DDQ, has been successfully developed ...
Meng Gao, Wenting Zhao, Hongyi Zhao, Ziyun Lin, Dongfeng Zhang, Haihong Huang   +5 more
doaj   +1 more source

Strecker degradation of amino acids promoted by a camphor-derived sulfonamide [PDF]

, 2016
A camphor-derived sulfonimine with a conjugated carbonyl group, oxoimine 1 (O2SNC10H13O), reacts with amino acids (glycine, L-alanine, L-phenylalanine, L-leucine) to form a compound O2SNC10H13NC10H14NSO2 (2) which was characterized by spectroscopic means
Carvalho, M. Fernanda N. N., Ferreira, M. Joao, Herrmann, Rudolf, Knittel, Ana S. O., Oliveira, Maria da C., Pessoa, Joao C., Wagner, Gabriele   +6 more
core   +4 more sources

A Facile One-Pot Construction of Succinimide-Fused Spiro[Pyrrolidine-2,3′-Oxindoles] via 1,3-Dipolar Cycloaddition Involving 3-Amino Oxindoles and Maleimides

Molecules, 2018
Increasing interests have been invested in the development of synthetic strategies toward the construction of spiro[pyrrolidine-2,3′-oxindole], which is the core structural skeleton in some compounds with diverse biological activities.
Lunqiang Jin, Feng Liang
doaj   +1 more source

Chemical Functionalization of Exfoliated Graphene [PDF]

, 2013
Graphene is turning out to be the material that will effectively kick-start a new era for nanotechnology. The impressive properties of this atom-thick carbon layer are taking shape and form with early reports of successful applications based on it.
Economopoulos, Solon, Tagmatarchis, Nikos   +1 more
core   +1 more source

Highly diastereoselective synthesis of substituted pyrrolidines using a sequence of azomethine ylide cycloaddition and nucleophilic cyclization [PDF]

, 2010
: Although cycloadditions of azomethine ylides usually give mixtures of endo/exo adducts, we successfully tuned the mechanistic path of a new reaction cascade to afford substituted pyrrolidines in high yields and diastereomeric purity.
Achiwa K., Achiwa K., Alker D., Burrell A. J. M., Burrell A. J. M., Bélanger G., Bélanger G., Carra R. J., Coldham I., Coldham I., Coldham I., Epperson M. T., Fishwick C. W. G., Grigg R., Grigg R., Lévesque F., Mayr H., Ohno M., Padwa A., Padwa A., Padwa A., Pandey G., Pearson W. H., Pearson W. H., Pearson W. H., Roussi G., Thomas L. D., Tsuge O., Vedejs E., Vedejs E., Washizuka K.   +30 more
core   +1 more source

Modern Methods for Conjugated Polymers Preparation: A Concept of Transition Metal‐Free Synthesis

European Journal of Organic Chemistry, Volume 28, Issue 2, January 10, 2025.
Conjugated polymers (CPs) are promising organic materials currently at the center of the organic electronics revolution. Synthesis strategies play a crucial role in the rise of this field, and this review aims to shed light on transition metal‐free organic chemistry for the synthesis of conjugated polymers, which is currently experiencing a renaissance.
Tomaž Kotnik, Sebastijan Kovačič
wiley   +1 more source

New Chemistry of Imidazolinium ylides [PDF]

, 2001
Previous work in this group has shown 4,5-dihydroimidazolium ylides, formed by N- alkylation of 4,5-dihydroimidazoles, to undergo 1,3-dipolar cycloadditions with a range of dipolarophiles in a highly regio- and stereoselective fashion.
Lory, Pedro M. J.
core   +1 more source