Results 141 to 150 of about 41,109 (281)

Open‐Chain Tetrapyrroles Meet Metal Ions in the Functional Molecular Material Science

ChemPlusChem, EarlyView.
Open‐chain tetrapyrroles, synthesized via oxidative cleavage and condensation, offer greater structural flexibility than cyclic counterparts like porphyrins. Their tunable electronic and geometric properties through metalation enable applications in bioimaging, therapies, ion sensing, chiroptical materials, and spintronic devices, making them valuable ...
Aninda Ghosh, Sandipa Bhandari, Hiroyuki Furuta, Masatoshi Ishida   +3 more
wiley   +1 more source

Synthesis of Pyrrole via a Silver-Catalyzed 1,3-Dipolar Cycloaddition/Oxidative Dehydrogenative Aromatization Tandem Reaction.

Journal of Organic Chemistry, 2017
Pyrroles are an important group of heterocyclic compounds with a wide range of interesting properties, which have resulted in numerous applications in a variety of fields.
Y. Liu, Huayou Hu, Xiang Wang, Sanjun Zhi, Y. Kan, Chao Wang   +5 more
semanticscholar   +1 more source

Double Click for Chirality: Chiral Dibenzo‐cycloocta‐bis‐triazoles via Strain‐Promoted Alkyne‐Azide Cycloaddition

ChemPhotoChem, EarlyView.
Strain‐promoted, double alkyne‐azide 1,3‐dipolar cycloadditions make dibenzo‐cycloocta‐bis‐triazoles which display a form of chirality that to date has been overlooked. The enantiomers can be resolved, with their remarkably high configurational stability being exemplified through a chiral fluorescent example.
Sebastian Pim, Aaron D. G. Campbell, Dmitry Levshov, Wouter Herrebout, Gonzalo Durán‐Sampedro, Michael J. Hall, Roly J. Armstrong, Donal F. O'Shea   +7 more
wiley   +1 more source

Production of graphene in solution by unzipping of carbon nanotubes [PDF]

, 2011
Chemical modification of the outer graphene layer of carbon nanotubes is an approach increasingly used, mainly to overcome the problem of interfacial bonding with different materials.
Costa, Florinda, Cunha, E. M., Fernandes, António J., Oliveira, Elisabete, Paiva, M. C.   +4 more
core  

Asymmetric 1,3-Dipolar Cycloadditons of Stabilized Azomethine Ylides with Nitroalkenes [PDF]

, 2014
This review highlights the biological importance of many polysubstituted nitro-prolines and -pyrrolidines. Their preparation using asymmetric 1,3-dipolar cycloadditions of azomethine ylides with nitroalkenes using diastereoselective and enantioselective ...
Nájera, Carmen, Sansano, Jose M.
core   +2 more sources

Highly Efficient and Diastereoselective Synthesis of New Pyrazolylpyrrolizine and Pyrazolylpyrrolidine Derivates by a Three-Component Domino Process

Molecules, 2014
Diastereoselective reactions between 4-formylpyrazoles, N-substituted maleimides and glycine derivates led to new series of pyrazolyldipyrrolo [3,4-a:3',4'-f]pyrrolizines and pyrazolylpyrrolo[3,4-c]pyrroles in good yields.
Jairo Quiroga, Jaime Gálvez, Rodrigo Abonia, Braulio Insuasty, Alejandro Ortíz, Justo Cobo, Manuel Nogueras   +6 more
doaj   +1 more source

Synthesis of Chiral Pyrazoles: A 1,3-Dipolar Cycloaddition/[1,5] Sigmatropic Rearrangement with Stereoretentive Migration of a Stereogenic Group.

Angewandte Chemie, 2015
The reactions between terminal alkynes and α-chiral tosylhydrazones lead to the obtention of chiral pyrazoles with a stereogenic group directly attached at a nitrogen atom. The cascade reaction includes decomposition of the hydrazone into a diazocompound,
M. C. Pérez-Aguilar, C. Valdés
semanticscholar   +1 more source

Decarboxylative 1,3-dipolar cycloadditions of l-proline

RSC Advances
l-Proline is widely used in 1,3-dipolar cycloaddition reactions. Azomethine ylide derived from decarboxylative condensation of l-proline and 1,2-dicarbonyl compounds can directly react with various dipolarophiles through 1,3-dipolar cycloaddition.
Fatemeh Doraghi, Azam Serajian, Somaye Karimian, Mehdi Ghanbarlou, Fatemeh Moradkhani, Bagher Larijani, Mohammad Mahdavi   +6 more
openaire   +2 more sources

Zinc (II) Imidoyl Azide Coordination Polymer, an Unexpected Compound with Insensitive Explosive Properties

European Journal of Organic Chemistry, EarlyView.
A new type of coordination polymer has been discovered while looking for high‐performance, insensitive secondary explosives. This polymer made of scarce imidoyl azide structures, demonstrates interesting pyrotechnic characteristics like a density greater than 2.00 g.cm−3 and great insensitivity towards thermal and mechanical stresses.
Lucas Blanck, Thibaud Alaime, Geneviève Eck, Julie Perouel, Rachid Baati   +4 more
wiley   +1 more source

(4+2)-cycloaddition of nitroalkenes with ynamines; formation of a 4H-1,2-oxazine 2-oxide derivative [PDF]

, 1980
The formation of a thermally unstable (4+2)-cycloadduct, a 4H-1,2-oxazine 2-oxide derivative ( ), from the reaction of 1-nitrocyclopentene with 1-phenyl-2-(1-pyrrolidinyl)acetylene has been proven by the structure elucidation of isoxazole derivative ...
Pennings, M.L.M., Reinhoudt, D.N.
core   +2 more sources