Results 81 to 90 of about 27,886 (261)
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
Reactivity of Pnictaalumenes Towards 1,3‐Dipole Molecules
Angewandte Chemie International Edition, EarlyView.Pnictaalumenes with a Pn═Al multiple bonds undergo azide or diazoalkene insertions rather than [3+2] cycloadditions. This results in AlN2P heterocycles, which show a great structural variety depending on the sterics of the azide. With TMS‐diazoalkane, thermal rearrangements afford rare cyanidoaluminates. Abstract Alkynes undergo 1,3‐dipolar cyclization
Tim Wellnitz +7 more
wiley +1 more source
Bioorthogonal metal-free click-ligation of cRGD-pentapeptide to alginate [PDF]
, 2012 Click reactions have become very common and powerful ligation techniques, of which 1,3-dipolar cycloadditions have most frequently been employed. Since metal-mediated cycloadditions are incompatible in biomedical applications due to toxicity issues ...
Dräger, Gerald +2 more
core +2 more sources
1,3-Dipolar Cycloadditions of N-Benzyl Furfuryl Nitrones with Electron-rich Alkenes
Molecules, 2000 The 1,3-dipolar cycloaddition reaction of N-benzyl-C-(2-furyl)nitrones with electron-rich alkenes gives preferentially trans-substituted 3,5-disubstituted isoxazolidines (endo approach).
Tomas Tejero +3 more
doaj +1 more source
Acta Pharmaceutica Sinica B, 2012 Regio- and stereoselective 1,3-dipolar cycloadditions of C-(3-indolyl)-N-phenylnitrone (10) were carried out with different mono-substituted, disubstituted and cyclic dipolarophiles under mono-mode microwave irradiation to obtain substituted 3-(indol-3 ...
Vishal Sharma +9 more
doaj +1 more source
Angewandte Chemie International Edition, Accepted Article.Catalytic asymmetric 1,3‐dipolar cycloadditions (1,3‐DCA) using iminoesters as ylide precursors offer a powerful approach to accessing stereochemically complex, biologically relevant pyrrolidines. While previous studies have already achieved impressive stereoselectivities, catalytic productivity remains a challenge, with turnover numbers (TON ...
Adrian Bürstner +13 more
wiley +1 more source
Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]
, 2016 This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima +4 more
core +1 more source
ChemElectroChem, EarlyView.N‐methyl‐nitroaryl‐furanyl‐nitrone (LQB‐569) suffers a 10‐electron reduction, forming a hydrazine group with two terminal hydroxylamine groups. Nitrones’ antioxidant capacity (AO), despite being very low, correlates with their oxidation profiles, and the ones able to oxidize more easily have better results on DPPH• scavenging and ferric‐reducing ...
Danyelle Cândido Santos +9 more
wiley +1 more source
1, 3-Dipolar Cycloaddition (Part I): Synthesis of 1, 2, 3-Triazole Derivatives in Nucleoside Chemistry [PDF]
, 2015 Bakrom katalizirana Huisgenova 1, 3-dipolarna cikloadicija azida i terminalnih alkina kojom regioselektivno nastaju 1, 4-disupstituirani 1, 2, 3-triazoli često je primjenjivana metoda sintetske organske kemije.
Bajić, Miroslav +3 more
core +2 more sources
iScience, 2019 Summary: Development of a general catalytic and highly efficient method utilizing readily available precursors for the regio- and stereoselective construction of bioactive natural-product-inspired spiro architectures remains a formidable challenge in ...
Chong Shen +5 more
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