Results 21 to 30 of about 5,322 (210)
Divergent Synthesis of C5‐Heteroatom Substituted Oxazoles [PDF]
, 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‐
Hans‐Dieter Arndt +5 more
core +1 more source
Enantiomeric Separation of New Chiral Azole Compounds
Molecules, 2021 Twelve new azole compounds were synthesized through an ene reaction involving methylidene heterocycles and phenylmaleimide, producing four oxazoles, five thiazoles, and one pyridine derivative, and ethyl glyoxylate for an oxazole and a thiazole compound.
Marziyeh E. Kenari +9 more
doaj +1 more source
Proceedings, 2019 Six 1,3-oxazoles were synthetized in moderate to good yields by Van Leusen reaction in a pressure reactor. The methodology allowed to decrease the reaction times reported in the literature from hours to 20 min.
Verónica G. García-Ramírez +4 more
doaj +1 more source
Monosubstituted Oxazoles. 1. Synthesis of 5-Substituted Oxazoles by Directed Alkylation
, 2016 A general method is presented for synthesis of 2-(methylthio)-5-substituted oxazoles 2. Deprotonation of the readily available 2-(methylthio)oxazole (1) with n-BuLi occurs smoothly in the presence of TMEDA and regiospecifically at C5.
Tadeusz F. Molinski (1313355) +1 more
core +2 more sources
Diazocarbonyl and Related Compounds in the Synthesis of Azoles
Molecules, 2021 Diazocarbonyl compounds have found numerous applications in many areas of chemistry. Among the most developed fields of diazo chemistry is the preparation of azoles from diazo compounds.
Anton Budeev +3 more
doaj +1 more source
Rhodium carbenoid route to oxazoles [PDF]
, 1994 This thesis describes investigations by the author into the preparation of the oxazole heterocyclic system, by the use of rhodium carbenoid methodology.
Kevin J. Doyle (2426908)
core +3 more sources
Gold Catalyzed Multicomponent Reactions beyond A3 Coupling
Molecules, 2018 The preparation of complex architectures has inspired the search for new methods and new processes in organic synthesis. Multicomponent reactions have become an interesting approach to achieve such molecular diversity and complexity.
Renso Visbal +3 more
doaj +1 more source
Transition metal-free cycloisomerization of propargylic amides to oxazoles in hexafluoroisopropanol (HFIP) [PDF]
, 2022 A transition metal-free method for the cycloisomerization of propargylic amides to oxazoles was developed. The reaction utilizes in situ generated hydrogen chloride in hexafluoroisopropanol (HFIP).
Krause, Norbert +2 more
core +1 more source
Molecules, 2022 An efficient, versatile, and one-pot method for the preparation of novel fluorinated thiazolo- and oxazolo[3,2-a]pyrimidin-7-ones is described from 2-aminothiazoles or 2-amino-oxazoles and fluorinated alkynoates.
Wafa Blancou +4 more
doaj +1 more source
, 1980 Oxazoles are prepared from the ketoximes in a single pot ...
Bhatt, MV, Reddy, Gaddam Subba
core +2 more sources