Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Esperanza Velarde"'
Autor:
Joseph M. Muchowski, Claudia A. Contreras, Sylvie L. Berthiaume, Elena E. Vale, Angel Guzman, Alicia Cervantes, Esperanza Velarde
Publikováno v:
Canadian Journal of Chemistry. 73:336-342
The N,C-dilithiated derivatives of the N-tert-butoxycarbonyl-2-alkylthiomethylanilines 5a–c and the N-tert-butoxycarbonyl-2-alkoxycarbonylmethylanilines 11a, b were converted into the N-tert-butoxycarbonyl-oxindole-2-thiones(thiols) 7a–c and 14a,
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 23
Efficacious methods for the synthesis of 3-arylpyrroles or 3-pyrrolylacetylenes are described based on the palladium-catalyzed coupling of appropriate 1-(triisopropylsilyl)-3-substituted pyrroles with aryl halides or monosubstituted acetylenes and su
Autor:
Angel Guzman, Sylvie L. Berthiaume, C. A. Contreras, A. Cervantes, E. E. Vale, Esperanza Velarde, J. M. Muchowski
Publikováno v:
ChemInform. 26
Publikováno v:
Synthetic Communications. 20:2059-2064
A convenient procedure for the Pd(O) catalyzed cross-coupling of monosubstituted acetylenes with aryl halides, in which palladium on charcoal serves as the source of the noble metal is described.
Autor:
Elewa, Safaa I.1 (AUTHOR), El-Farargy, Ahmed F.2 (AUTHOR), Nafie, Mohamed S.3 (AUTHOR), Mansour, Eman1 (AUTHOR)
Publikováno v:
Polycyclic Aromatic Compounds. 2023, Vol. 43 Issue 7, p5807-5825. 19p.
Autor:
O. Halpern, T. Craig Thurber, Albert R. Van Horn, Michael L. Maddox, Humberto Carpio, Robert Greenhouse, J. Ackrell, Fidencio Franco, Diane Cho, Y. Antonio, Derek Tegg, Angel Guzman, Doug Wren, Richard Koehler, Anthony Prince, Virginia Perez, Raquel Salas, Esperanza Velarde, Edvige Galeazzi, Alicia Leon, Joseph M. Muchowski, David Valdés, P. Gallegra
Publikováno v:
Canadian Journal of Chemistry. 60:2295-2312
Several syntheses of the previously unknown 1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylic acid and various 5- and 6-substituted derivatives thereof have been devised. Some of these processes have been extended to the heretofore unreported 5,6,7,8
Publikováno v:
Journal of the American Chemical Society. 95:6655-6665
Publikováno v:
Canadian Journal of Chemistry. 65:2164-2174
The synthesis of 4-oxo-9-deoxy-9-azaprostaglandin I2 (23a) and two ω-chain analogues thereof (23c and 23e) is described. The most salient features of the synthetic process used were (a) introduction of the nitrogen functionality at C-9 by [3,3] sigm
Autor:
Michael L. Maddox, Jean-Marie Dollat, Josefina Gallina, Jean-Louis Luche, Laszlo Tokes, Pierre Crabbé, Esperanza Velarde
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :730-734
The trans- and cis-2-methyl-1-vinylcyclohexyl acetates (4b) and (5b) were prepared from 2-methylcyclohexanone (1). The stereochemistry of the reaction of these isomers when treated with lithium dialkylcopper reagents is investigated and the structure