Results 281 to 290 of about 17,490 (306)
Some of the next articles are maybe not open access.
Journal of Organic Chemistry, 2017
A novel and straightforward protocol is demonstrated for the synthesis of highly substituted oxazoles from readily accessible ynamides in the presence of ytterbium(III) trifluoromethanesulfonate [Yb(OTf)3], N-iodosuccinimide (NIS), and acetonitrile ...
Rajendra K. Mallick +2 more
semanticscholar +1 more source
A novel and straightforward protocol is demonstrated for the synthesis of highly substituted oxazoles from readily accessible ynamides in the presence of ytterbium(III) trifluoromethanesulfonate [Yb(OTf)3], N-iodosuccinimide (NIS), and acetonitrile ...
Rajendra K. Mallick +2 more
semanticscholar +1 more source
Journal of Heterocyclic Chemistry, 1990
AbstractThe reaction of 2‐propargyloxybenzamide with strong base has been shown to lead to formation of an oxazole and not a benzoxazepinone as reported. The structure has been confirmed by synthesis.
Jules Freedman, Edward W. Huber
openaire +3 more sources
AbstractThe reaction of 2‐propargyloxybenzamide with strong base has been shown to lead to formation of an oxazole and not a benzoxazepinone as reported. The structure has been confirmed by synthesis.
Jules Freedman, Edward W. Huber
openaire +3 more sources
, 2016
The synthesis of hydroperoxymethyl oxazoles by oxidation of alkylideneoxazoles with molecular oxygen was implemented in a microstructured reactor for increased safety and larger-scale applications.
Sarah Bay +3 more
semanticscholar +1 more source
The synthesis of hydroperoxymethyl oxazoles by oxidation of alkylideneoxazoles with molecular oxygen was implemented in a microstructured reactor for increased safety and larger-scale applications.
Sarah Bay +3 more
semanticscholar +1 more source
Chemical Communications, 2017
An I2-promoted formal [3+2] cycloaddition for access to oxazoles has been demonstrated. This is the first example of a Lewis acid-promoted formal [3+2] cycloaddition of isocyanides with methyl ketones involving the C[triple bond, length as m-dash]N ...
Xia Wu +5 more
semanticscholar +1 more source
An I2-promoted formal [3+2] cycloaddition for access to oxazoles has been demonstrated. This is the first example of a Lewis acid-promoted formal [3+2] cycloaddition of isocyanides with methyl ketones involving the C[triple bond, length as m-dash]N ...
Xia Wu +5 more
semanticscholar +1 more source
Journal of Organic Chemistry, 2017
A directing-group-controlled, copper-catalyzed divergent approach to indoles and oxazoles from enamides has been developed. The picolinamide-derived enamides undergo the intramolecular aromatic C-H amination in the presence of a Cu(OPiv)2 catalyst and an
Chiaki Yamamoto +3 more
semanticscholar +1 more source
A directing-group-controlled, copper-catalyzed divergent approach to indoles and oxazoles from enamides has been developed. The picolinamide-derived enamides undergo the intramolecular aromatic C-H amination in the presence of a Cu(OPiv)2 catalyst and an
Chiaki Yamamoto +3 more
semanticscholar +1 more source
2009
Oxazoles from the condensation of equimolar amounts of aldehyde cyanohydrins and aromatic aldehydes in dry ether in the presence of dry hydrochloric acid.
openaire +2 more sources
Oxazoles from the condensation of equimolar amounts of aldehyde cyanohydrins and aromatic aldehydes in dry ether in the presence of dry hydrochloric acid.
openaire +2 more sources
ChemInform Abstract: THE CHEMISTRY OF OXAZOLES
Chemischer Informationsdienst, 1975AbstractDer Übersichtsartikel behandelt Synthesen, physikalische Eigenschaften und Reaktionen von Oxazolen.
I. J. Turchi, M. J. S. Dewar
openaire +2 more sources
Journal of Organic Chemistry, 2017
A combination of I2, iodosylbenzene, and trimethylsilyl trifluoromethanesulfonate (TMSOTf) is effective for single-step synthesis of iodinated oxazoles from N-propargyl amides via the aromatization of the iodocyclized intermediates, which has difficulty ...
Sho W. Suzuki, A. Saito
semanticscholar +1 more source
A combination of I2, iodosylbenzene, and trimethylsilyl trifluoromethanesulfonate (TMSOTf) is effective for single-step synthesis of iodinated oxazoles from N-propargyl amides via the aromatization of the iodocyclized intermediates, which has difficulty ...
Sho W. Suzuki, A. Saito
semanticscholar +1 more source
Transition-metal-free synthesis of oxazoles: valuable structural fragments in drug discovery
, 2016Oxazole, a central structural motif of numerous complex natural products and pharmaceuticals, is closely associated with the development of contemporary drug discovery research due to a diverse portfolio of biological functions.
Aliya Ibrar +4 more
semanticscholar +1 more source
Organic Letters, 2017
A novel strategy to synthesize highly functionalized oxazoles has been successfully developed via a base-mediated intermolecular substitution between 2-acyloxy-2H-azirines and N-nucleophile or O-nucleophile with a subsequent ring expansion of a 2H ...
Xiyan Duan +5 more
semanticscholar +1 more source
A novel strategy to synthesize highly functionalized oxazoles has been successfully developed via a base-mediated intermolecular substitution between 2-acyloxy-2H-azirines and N-nucleophile or O-nucleophile with a subsequent ring expansion of a 2H ...
Xiyan Duan +5 more
semanticscholar +1 more source