Results 11 to 20 of about 4,839 (215)

Continuous multistep synthesis of 2-(azidomethyl)oxazoles

open access: yesBeilstein Journal of Organic Chemistry, 2018
An efficient three-step protocol was developed to produce 2-(azidomethyl)oxazoles from vinyl azides in a continuous-flow process. The general synthetic strategy involves a thermolysis of vinyl azides to generate azirines, which react with bromoacetyl ...
Thaís A. Rossa   +4 more
doaj   +3 more sources

Synthesis of Oxazoles Containing CF3-Substituted Alcohol Unit via Tandem Cycloisomerization/Hydroxyalkylation from N-Propargylamides with Trifluoropyruvates [PDF]

open access: yesMolecules
Oxazoles are important five-membered heterocycles that contain both nitrogen and oxygen atoms. Due to their wide range of biological activities, many oxazoles demonstrate potential for extensive application in various fields, including medicinal ...
Juan-Juan Gao   +6 more
doaj   +2 more sources

Synthesis and Optical Properties of N-Arylnaphtho- and Anthra[2,3-d]oxazol-2-amines [PDF]

open access: yesMolecules
Oxazole, a versatile and significant heteroarene, serves as a bridge between synthetic organic chemistry and applications in the medicinal, pharmaceutical, and industrial fields.
Yuki Murata   +4 more
doaj   +2 more sources

Silver mediated one-step synthesis of oxazoles from α-haloketones [PDF]

open access: yesJournal of Saudi Chemical Society, 2011
An efficient silver mediated one-step synthesis/construction of oxazoles using α-haloketones and primary amides is herein described. The methodology is efficient and simple to perform, giving the desired oxazoles in good to excellent yields.
Christian Spiteri   +3 more
doaj   +2 more sources

GO/MNPs–TEA–CuI in water: a green and efficient catalytic system for multicomponent preparation of highly substituted imidazoles and oxazoles [PDF]

open access: yesFrontiers in Chemistry
A sustainable and highly efficient catalytic protocol has been developed employing graphene oxide-supported magnetic nanoparticles functionalized with triethanolamine and copper(I) iodide (GO/MNPs–TEA–CuI) for the synthesis of functionalized imidazole ...
Mohamed Abu Shuheil   +7 more
doaj   +2 more sources

Isomerization of 5-(2H-Azirin-2-yl)oxazoles: An Atom-Economic Approach to 4H-Pyrrolo[2,3-d]oxazoles

open access: yesMolecules, 2021
An atom economical method for the preparation of variously substituted 4H-pyrrolo[2,3-d]oxazoles was developed on the basis of thermal isomerization of 5-(2H-azirin-2-yl)oxazoles.
Timur O. Zanakhov   +4 more
doaj   +2 more sources

Divergent photochemical ring-replacement of isoxazoles [PDF]

open access: yesNature Communications
Isoxazoles, oxazoles, and other five-membered heteroaromatics are prevalent motifs in core structure of pharmaceuticals and agrochemicals. In early-stage drug discovery, it is common practice to prepare libraries of analogues featuring different ...
Yan Xu   +5 more
doaj   +2 more sources

Development of a method for the synthesis of 2,4,5-trisubstituted oxazoles composed of carboxylic acid, amino acid, and boronic acid [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2017
A novel method for the synthesis of trisubstituted oxazoles via a one-pot oxazole synthesis/Suzuki–Miyaura coupling sequence has been developed.
Kohei Yamada   +2 more
doaj   +3 more sources

Identification and isolation of insecticidal oxazoles from Pseudomonas spp.

open access: yesBeilstein Journal of Organic Chemistry, 2012
Two new and five known oxazoles were identified from two different Pseudomonas strains in addition to the known pyrones pseudopyronine A and B. Labeling experiments confirmed their structures and gave initial evidence for a novel biosynthesis pathway of ...
Florian Grundmann   +7 more
doaj   +2 more sources

Benzo[d]oxazoles from Anilides by N-Deprotonation–O-SNAr Cyclization [PDF]

open access: yesMolecules
A synthesis of benzo[d]oxazoles by an N-deprotonation–O-SNAr cyclization sequence from anilide precursors is reported. Anilides derived from 2-fluorobenzaldehydes, activated toward SNAr ring closure by C5 electron-withdrawing groups, were prepared and ...
Nash E. Nevels   +2 more
doaj   +2 more sources

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