Results 21 to 30 of about 5,225 (230)
Antioxidants, 2019 The growing interest in the chemistry of unsaturated ring-fused 1,3-heterocycles, in this particular case 1,3-oxazines, arise in part from their versatile pharmacological applications.
Guadalupe Firpo +10 more
doaj +1 more source
Synthesis and Conformational Analysis of Naphthoxazine-Fused Phenanthrene Derivatives
Molecules, 2020 The synthesis of new phenanthr[9,10-e][1,3]oxazines was achieved by the direct coupling of 9-phenanthrol with cyclic imines in the modified aza-Friedel–Crafts reaction followed by the ring closure of the resulting bifunctional aminophenanthrols with ...
Khadija Belasri +6 more
doaj +1 more source
ChemistryOpen, 2022 A series of novel heterocyclic structures, namely 1,3‐oxazines, 1,3‐thiazines and 2,4‐diaminopyrimidines, were designed and synthesised. The bioassay tests demonstrated that, among these analogues, 2,4‐diaminopyridine derivatives showed significant ...
Fatima Z. Bamou +6 more
doaj +1 more source
Easy Access to New Heterocyclic Systems: 1,4-Oxazine and Substituted 1,4-Oxazines [PDF]
The Journal of Organic Chemistry, 2007 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Elise, Claveau +4 more
openaire +2 more sources
Alkoxyallenes as building blocks for organic synthesis [PDF]
, 2014 Alkoxyallenes are unusually versatile C3 building blocks in organic synthesis. Hence this tutorial review summarizes the most important transformations, including subsequent reactions and their applications in the synthesis of relevant compounds, e.g ...
Reissig, Hans-Ulrich, Zimmer, Reinhold
core +1 more source
Isoxazolium N-ylides and 1-oxa-5-azahexa-1,3,5-trienes on the way from isoxazoles to 2H-1,3-oxazines
Beilstein Journal of Organic Chemistry, 2014 Theoretical and experimental studies of the reaction of isoxazoles with diazo compounds show that the formation of 2H-1,3-oxazines proceeds via the formation of (3Z)-1-oxa-5-azahexa-1,3,5-trienes which undergo a 6π-cyclization.
Alexander F. Khlebnikov +6 more
doaj +1 more source
Chemical Physics Impact, 2022 Silver nanoparticles (AgNPs) were synthesized through greener route using the Ethanol extract of Clerodendrum colebrookianum leaves. The synthesized AgNPs were characterized and confirmed through using various analytical studies like FT-IR, UV–vis, XRD ...
Putusenla Imchen +3 more
doaj +1 more source
Syntheses, transformations and applications of aminonaphthol derivatives prepared via modified Mannich reactions [PDF]
, 2013 A special alteration is the three-component modi fi ed Mannich reaction (mMR), in which formaldehyde is replaced by an aromatic aldehyde, the secondary amine by ammonia, and the C e H acid by an electron-rich aromatic compound such as 1- or 2 ...
Fülöp, Ferenc, Szatmári, István
core +1 more source
Enantioselective and Regiodivergent Copper-Catalyzed Electrophilic Arylation of Allylic Amides with Diaryliodonium Salts. [PDF]
, 2015 A catalytic enantioselective and regiodivergent arylation of alkenes is described. Chiral copper(II)bisoxazoline complexes catalyze the addition of diaryliodonium salts to allylic amides in excellent ee.
Cahard, Elise +3 more
core +4 more sources
Palladium-catalyzed cross coupling reactions of 4-bromo-6H-1,2-oxazines
Beilstein Journal of Organic Chemistry, 2009 A number of 4-aryl- and 4-alkynyl-substituted 6H-1,2-oxazines 8 and 9 have been prepared in good yields via cross coupling reactions of halogenated precursors 2, which in turn are easily accessible by bromination of 6H-1,2-oxazines 1. Lewis-acid promoted
Reinhold Zimmer +5 more
doaj +1 more source