Results 1 to 10 of about 14,648 (255)

Inter- and intramolecular Diels-Alder/retro-Diels-Alder reactions of 4-silylated oxazoles [PDF]

open access: diamondARKIVOC, 2002
4-Silylated oxazoles have been shown to undergo inter- and intramolecular Diels-Alder/retro-Diels-Alder reactions with electron-poor alkynes to generate polysubstituted furans.
Ducept, P.C., Marsden, S.P.
core   +5 more sources

Photochemical approach to functionalized benzobicyclo[3.2.1]octene structures via fused oxazoline derivatives from 4- and 5-(o-vinylstyryl)oxazoles [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2014
Novel cis/trans-4- and cis/trans-5-(2-vinylstyryl)oxazoles have been synthesized by Wittig reactions from the diphosphonium salt of α, α’-o-xylene dibromide, formaldehyde and 4- and 5-oxazolecarbaldehydes, respectively.
Božić, Simona   +3 more
core   +4 more sources

Regioselective Formation of 2,5-Disubstituted Oxazoles Via Copper(I)-Catalyzed Cycloaddition of Acyl Azides and 1-Alkynes [PDF]

open access: green, 2011
The reaction of 1-alkynes with acylazides in the presence of [Tpm*,BrCu(NCMe)]BF4 (Tpm*,Br = tris(3,5-dimethyl-4-bromopyrazolyl)methane) as the catalyst provides 2,5-oxazoles in moderate to high yields.
Cano Rico, Israel   +3 more
core   +3 more sources

Divergent Synthesis of C5‐Heteroatom Substituted Oxazoles [PDF]

open access: yes, 2022
5‐Oxazoyl‐sulfamates have been profiled as versatile building blocks for modifications of oxazoles with various nucleophiles. The unified approach provides a diversification platform to directly access 5‐amino‐oxazoles, 5‐oxazolyl‐sulfides, and 5‐oxazoyl‐
Arndt, Hans‐Dieter   +2 more
core   +1 more source

Highly selective electrochemical hydrogenation of alkynes: Rapid construction of mechanochromic materials [PDF]

open access: yes, 2019
Electrochemical hydrogenation has emerged as an environmentally benign and operationally simple alternative to traditional catalytic reduction of organic compounds.
Ge, Haibo, Li, Bijin
core   +1 more source

Transition metal-mediated synthesis of oxazoles [PDF]

open access: yes, 2014
Among the synthetic methods for the formation of the oxazole ring, transition metal-mediated protocols are the most attractive in terms of selectivity, efficiency and mildness of reaction conditions.
Bresciani, Stefano   +1 more
core   +1 more source

The rapid synthesis of oxazolines and their heterogeneous oxidation to oxazoles under flow conditions. [PDF]

open access: yes, 2014
A rapid flow synthesis of oxazolines and their oxidation to the corresponding oxazoles is reported. The oxazolines are prepared at room temperature in a stereospecific manner, with inversion of stereochemistry, from β-hydroxy amides using Deoxo-Fluor ...
Battilocchio, Claudio   +6 more
core   +2 more sources

Total synthesis of the cyclic dodecapeptides wewakazole and wewakazole B [PDF]

open access: yes, 2017
The cyclic dodecapeptides wewakazole and wewakazole B have been synthesized by a divergent strategy via a common tris-proline containing oxazole octapeptide and two separate bisoxazole containing tetrapeptide units, followed by peptide coupling and ...
Dexter, Hannah L.   +2 more
core   +3 more sources

Sir John Cornforth AC CBE FRS: his synthetic work [PDF]

open access: yes, 2015
Sir John Cornforth’s work on the synthesis of cholesterol and penicillamine, on the chemistry of oxazoles, the stereochemistry of the synthesis of alkenes, the synthesis of abscisic acid and of dibenzophospholes as mimics of enzyme action, is ...
Abraham E.P.   +15 more
core   +1 more source

Intramolecular Pd(II)-Catalyzed Cyclization of Propargylamides: Straightforward Synthesis of 5-Oxazole-carbaldehydes [PDF]

open access: yes, 2008
(Chemical Equation Presented) Direct synthesis of 2-substituted 5-oxazolecarbaldehydes was performed by intramolecular reaction of propargylamides through treatment with a catalytic amount of Pd(II) salts in the presence of a stoichiometric amount of ...
BECCALLI E. M   +4 more
core   +1 more source

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