Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Rachid Chioua"'
Autor:
Antonio Herrera-Fernández, Roberto Martínez-Alvarez, Mourad Chioua, Rachid Chioua, John Almy, O. A. Loaiza
Publikováno v:
ARKIVOC, Vol 2007, Iss 16, Pp 58-64 (2007)
Externí odkaz:
https://doaj.org/article/8a2dd34ef16944f4a967ba90ee1da7fc
Autor:
Antonio Herrera, Roberto Martínez-Álvarez, Nazario Martín, Rachid Chioua, Angel Sánchez-Vázquez, Dolores Molero, John Almy, Mourad Chioua
Publikováno v:
Tetrahedron. 65:5817-5823
The Diels–Alder reaction of various pyrimidine ortho-quinodimethanes generated in situ with C60 gives access to a variety of new fullerodihydroquinazoline derivatives. This variety is increased since substituents on the pyrimidine ring can be easil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b22714cfa4e3e78e15dae08f7a4a9ef2
https://doi.org/10.1016/j.tet.2009.05.026
https://doi.org/10.1016/j.tet.2009.05.026
Autor:
Dolores Molero, Angel Sánchez-Vázquez, Rachid Chioua, John Almy, Mourad Chioua, Nazario Martín, Roberto Martínez-Álvarez, Antonio Herrera
Publikováno v:
Tetrahedron. 65:1697-1703
Two alternative methods for the preparation of new pyrimidine Diels–Alder cycloadducts from the readily available 2,4-bis(methylsulfanyl)-5,6-dihydrocyclobuta[ d ]pyrimidine are presented. In the first method, the in situ generated pyrimidine ortho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e353eda2a42ba526371458ef24456129
https://doi.org/10.1016/j.tet.2008.12.016
https://doi.org/10.1016/j.tet.2008.12.016
Autor:
Rachid Chioua, O. A. Loaiza, Mourad Chioua, Antonio Herrera-Fernández, Roberto Martínez-Álvarez, John Almy
Publikováno v:
ARKIVOC, Vol 2007, Iss 16, Pp 58-64 (2007)
2,4-Di-tert-butyl-5,6-dialkylpyrimidines were easily obtained in a one-step reaction from dialkyl ketones and pivalonitrile in the presence of triflic anhydride. pKa values determined show that these compounds can be used as highly sterically non-nuc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5922a731349041a271512d7f4c7a3281
https://www.arkat-usa.org/arkivoc-journal/browse-arkivoc/ark.5550190.0008.g06
https://www.arkat-usa.org/arkivoc-journal/browse-arkivoc/ark.5550190.0008.g06
Autor:
Angel Sánchez, Antonio J. Herrera, Roberto Martínez-Álvarez, John Almy, Rachid Chioua, Mourad Chioua
Publikováno v:
Letters in Organic Chemistry. 3:703-708
The Diels-Alder reactions of the ortho-quinodimethane (o-QDM) thermally generated from 2,4-diphenylciclobutapyrimidine with the dienophiles diethyl maleate, diethyl fumarate and dimethyl acetylenedicarboxylate have been investigated. The reaction aff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7aa5f52588b3baaa5d09f60ab1ee4209
https://doi.org/10.2174/157017806778699955
https://doi.org/10.2174/157017806778699955
Autor:
Rachid Chatt, Roberto Martínez-Álvarez, Angel Martínez Sánchez, John Almy, Rachid Chioua, Mourad Chioua, Antonio Herrera
Publikováno v:
Tetrahedron. 62:2799-2811
The one-pot reaction of 1-tetralone with nitriles in the presence of triflic anhydride affords in good yields 2,4-disubstituted 5,6-dihydrobenzo[ h ]quinazolines, which oxidation with DDQ leads to the corresponding benzo[ h ]quinazolines. 2-Tetralone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e33ea2bf3c6a863958755c646e62b7d
https://doi.org/10.1016/j.tet.2006.01.010
https://doi.org/10.1016/j.tet.2006.01.010
Publikováno v:
Tetrahedron. 58:10053-10058
The reaction of aliphatic ketones with aliphatic or aromatic nitriles in the presence of trifluoromethanesulfonic anhydride has been shown to be a very useful method for the preparation of alkyl- and aryl-pirimidines. The reaction shows a high degree
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a3e63c677454f8a2af4012615e3de4b
https://doi.org/10.1016/s0040-4020(02)01300-5
https://doi.org/10.1016/s0040-4020(02)01300-5
Autor:
Rachid Chioua, Angel Sánchez, Roberto Martínez-Álvarez, Antonio Herrera, Mourad Chioua, Dolores Molero
Publikováno v:
Magnetic Resonance in Chemistry. 40:293-299
The proton and carbon spectra of new 2,4-diaryl-substituted cycloalkyl[d]pyrimidines prepared in a simple one-pot reaction, are reported. Copyright © 2002 John Wiley & Sons, Ltd.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e5c0af8eee82036df1a4e9e1a536377
https://doi.org/10.1002/mrc.1002
https://doi.org/10.1002/mrc.1002
Publikováno v:
Tetrahedron Letters. 47:5463-5465
The one-pot reaction of 1-benzylpiperidin-4-one with different nitriles in the presence of triflic anhydride affords substituted tetrahydropyrido[4,3-d]pyrimidines. Reaction with methylthiocyanate forms the corresponding methylthio substituted tetrah
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b47f8f2ea1e0cd00fc3095e42d51a83c
https://doi.org/10.1016/j.tetlet.2006.05.183
https://doi.org/10.1016/j.tetlet.2006.05.183
Publikováno v:
Synthesis. :503-505
Triflic anhydride was found to be efficient for the cyclotrimerization of dialkylcyanamides under mild conditions. The same reaction can be applied to aryl nitriles and thiocyanates.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30b1e991e86ed26866a32a3c2ba23d60
https://doi.org/10.1055/s-2004-815927
https://doi.org/10.1055/s-2004-815927