Results 41 to 50 of about 4,839 (215)
2-(3-Bromophenyl)imidazo[2,1-b]oxazole
Molbank, 2023 The microwave-assisted reaction of 2-nitroimidazole with 3-bromophenacyl bromide in the presence of potassium carbonate as a base and dimethylformamide as a solvent afforded 2-(3-bromophenyl)imidazo[2,1-b]oxazole.
Ángel Cores +2 more
doaj +1 more source
A Direct Synthesis of Oxazoles from Aldehydes
, 2016 An expedient method for the direct conversion of aldehydes to 2,4-disubstituted oxazoles is presented. The method relies on the oxidation of an oxazolidine formed from the condensation of serine with an aldehyde and proceeds through a 2,5-dihydrooxazole ...
Thomas H. Graham (2141350)
core +2 more sources
, 2013 The reaction of N-sulfonyl propargylamides in the presence of a base catalyst selectively affords 5-sulfonylmethyl oxazoles via 1,4-sulfonyl migration. Allenes have been established as the key intermediates.
Wan, Boshun +5 more
core +1 more source
Beilstein Journal of Organic Chemistry, 2015 The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates.
Kandasamy Rajaguru +4 more
doaj +1 more source
Palladium Cross-Couplings of Oxazoles [PDF]
, 2008 A review covering the literature until April 2008 concerning organometallic reactions to funcionalise oxazoles is described. A protocol for the functionalisation of the oxazole 2- and 4-positions using the Suzuki coupling reaction is described.
Flegeau, Emmanuel Ferrer
core +1 more source
Beilstein Journal of Organic Chemistry, 2019 The LANCA three-component reaction of lithiated alkoxyallenes LA, nitriles N and carboxylic acids CA leads to β-ketoenamides KE in good to excellent yields.
Tilman Lechel +4 more
doaj +1 more source
Recent Advances on O-Ethoxycarbonyl and O-Acyl Protected Cyanohydrins
Molecules, 2021 Ethoxycarbonyl cyanohydrins and O-acyl cyanohydrins are examples of O-protected cyanohydrins in which the protecting group presents an electrophilic center, contributing to additional reaction pathways.
Héctor Manuel Torres Domínguez +2 more
doaj +1 more source
Molecules, 2020 Mesoionics are neutral compounds that cannot be represented by a fully covalent or purely ionic structure. Among the possible mesomeric structures of these compounds are the diradical electronic configurations.
Antonio João da Silva Filho +2 more
doaj +1 more source
Microhydration Structures of Protonated Oxazole [PDF]
The Journal of Physical Chemistry A, 2019 The initial microhydration structures of the protonated pharmaceutical building block oxazole (Ox), H+Ox-Wn≤4, are determined by infrared photodissociation (IRPD) spectroscopy combined with quantum chemical dispersion-corrected density functional theory calculations (B3LYP-D3/aug-cc-pVTZ).
Kuntal Chatterjee, Otto Dopfer
openaire +2 more sources
Late‐Stage Functionalization of Peptides on the Solid Phase
Angewandte Chemie International Edition, EarlyView.Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner +2 more
wiley +1 more source