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Oxidation of mesoionic oxazolones by oxygen
(1991)
The reaction of molecular oxygen with several 2,4-disubstituted oxazolones (3a-3g) is studied in the present paper. It is shown that oxygen may induce oxidative dimerization to dehydrodimers (7a-7g) via the mesoionic form ...
IR Spectroscopy of b4 Fragment Ions of Protonated Pentapeptides in the X–H (X = C, N, O) Region
(American Chemical Society, 2013-02)
The structure of peptide fragments was studied using “action” IR spectroscopy. We report on room temperature IR spectra of b4 fragments of protonated GGGGG, AAAAA, and YGGFL in the X−H (X = C, N, O) stretching region. ...
A suitable synthesis of azlactones (4-benzylidene-2-phenyloxazolin-5-ones and 4-alkylidene-2-phenyloxazolin-5-ones) catalyzed by silica-alumina supported heteropolyacids
(Elsevier Science, 2009-01)
Eleven examples of azlactones (4-benzylidene-2-phenyloxazolin-5-ones and 4-alkylidene-2-phenyloxazolin-5-ones) were prepared via an Erlenmeyer-type synthesis from aromatic aldehydes, hippuric acid and acetic anhydride was ...
Synthesis of multi-functionalized 1-azabicycles through MAOS acid catalyzed formal aza-[3+3] cycloaddition of heterocyclic enaminones with oxazolones
(Tetrahedron Letters, 2013)
This study describes the combination of microwave heating and green acid catalysis by Bi(NO3)3·5H2O and AcOH as a practical one-pot diastereoselective synthetic route to alkaloid-like multi-functionalized 3,4-disubstituted ...
Synthesis of multi-functionalized 1-azabicycles through MAOS acid catalyzed formal aza-[3+3] cycloaddition of heterocyclic enaminones with oxazolones
(2013)
This study describes the combination of microwave heating and green acid catalysis by Bi(NO3)3·5H2O and AcOH as a practical one-pot diastereoselective synthetic route to alkaloid-like multi-functionalized 3,4-disubstituted ...
Síntese de 3-(organocalcogenil)-imidazotiazinas e funcionalização de inamidas via reações de ciclização, clorosselenação e tosilação promovidas por cloreto férrico e ácido p-toluilssulfônico
(Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e Exatas, 2022-02-21)
In this thesis, four synthetic protocols were developed for the synthesis of four new classes of compounds, including the synthesis of 3-(organocalalcogenyl)-benzoimidazothiazines, 4-(organocalalcogenyl)-oxazolones, vinyl ...