Results 101 to 110 of about 28,644 (231)
Chemistry – A European Journal, Volume 30, Issue 72, December 23, 2024.A convenient synthesis of planar chiral [2.2]paracyclophane imidazoline N,O‐ligands has been developed. The application of these classes of ligands showed excellent performance in organozinc additions to aldehydes. An improved seven‐step synthesis of [2.2]paracyclophane‐imidazoline N,O‐ligands (UCD‐Imphanols) possessing both central and planar ...
Sundaravel Vivek Kumar, Patrick J Guiry
wiley +1 more source
Phosphoramidite-Cu(OTf)2 complexes as chiral catalysts for 1,3-dipolar cycloaddition of iminoesters and nitroalkenes [PDF]
, 2013 Chiral complexes formed by phosphoramidites such as (Sa,R,R)-9 and Cu(OTf)2 are excellent catalysts for the general 1,3-dipolar cycloaddition between azomethine ylides and nitroalkenes affording the corresponding tetrasubstituted proline esters mainly as
Castelló Moncayo, Luis Miguel +5 more
core +2 more sources
Catalytic Enantioselective Functionalization of Maleimides: An Update
Chinese Journal of Chemistry, Volume 42, Issue 24, Page 3605-3622, 15 December 2024.Maleimides are multisite‐reactive scaffolds that have stimulated a growing interest in the field of synthetic organic chemistry. The present review covers the utilization of maleimides as electrophilic partners and pro‐nucleophilic partners in metal‐catalyzed or organocatalyzed functionalizations with the control of either central and/or axial ...
Muriel Amatore +3 more
wiley +1 more source
European Journal of Organic Chemistry, Volume 27, Issue 44, November 25, 2024.1,2‐Diaza‐1,3‐butadienes, also called azoalkenes, have received considerable attention as key synthons for constructing various heterocyclic scaffolds. This minireview summarizes the contribution of our group in this field over the period from 2009 to the present, focusing on the role of the azoene building block in forming the heterocyclic structures.
Lucia De Crescentini +4 more
wiley +1 more source
Pyrrolodiazines. 4. Structure and chemistry of 3,4-dihydropyrrolo[1,2-a]pyrazine [PDF]
, 1997 The structure of 3,4-dihydropyrrolo[1,2-a]pyrazine and its N-protonated form is studied by ab initio calculations. Examples of the reactivity of this poorly studied system are presented in which it is shown that the imino moiety does not react with ...
Andrés, José L. de +6 more
core +3 more sources
MoleculesThe asymmetric [3+2] cycloaddition of azomethine ylides generated from the corresponding imino ester-to-trans-β-nitrostyrene catalysis by chiral aziridine-containing phosphines and phosphine oxides is described. Of the sixteen stereoisomers that could be
Julia Szymańska +2 more
doaj +1 more source
Covalent functionalization of carbon nanotube forests grown in situ on a metal-silicon chip [PDF]
, 2012 We report on the successful covalent functionalization of carbon nanotube (CNT) forests, in situ grown on a silicon chip with thin metal contact film as the buffer layer between the CNT forests and the substrate.
Bosaeus, Niklas +5 more
core +1 more source
Functionalized multiwalled carbon nanotubes as ultrasound contrast agents [PDF]
, 2012 Ultrasonography is a fundamental diagnostic imaging tool in everyday clinical practice. Here, we are unique in describing the use of functionalized multiwalled carbon nanotubes (MWCNTs) as hyperechogenic material, suggesting their potential application ...
Bedognetti, Davide +11 more
core +1 more source
Donor-acceptor graphene-based hybrid materials for managing photoinduced electrontransfer reactions [PDF]
, 2014 Graphene research and in particular the topic of chemical functionalization has been exploded in the last decade. The main aim is to induce solubility and thereby enhance processability of the material, which is otherwise insoluble and inapplicable for ...
Pagona, Georgia +2 more
core
Asymmetric metal-catalyzed [3+2] cycloadditions of azomethine ylides [PDF]
, 2006 Cycloadditions of azomethine ylides with olefins provide a short, attractive route to pyrrolidine units with the potential to control the relative and absolute configuration by means of a chiral catalyst.
Stohler, Remo
core +1 more source