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| DOI | 10.1016/J.TET.2012.03.112 | ||||
| Año | 2012 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The ability of a homochiral sulfinyl group at the dienophile to act as a remote stereocontrol inductor in the Diels-Alder reaction with cyclopentadiene has been evaluated. High pressure conditions were required for the reactions of (S)-2-(p-tolylsulfinyl)styrenes 3-5 (E-1,2-disubstituted double bond) and 6-8 (1,1-disubstituted double bond). A good facial selectivity and total endo selectivity were attained with 1,1-disubstitued dienophiles, though the 1,2-disubstituted ones afforded poorer results. In contrast, (S)-[2-(p-tolylsulfinyl)phenyl] vinyl ketones 9-11 reacted readily at low temperature (-40 degrees C) with complete endo selectivity and high facial selectivity in the presence of Yb(OTf)(3) as a chelating reagent of sulfinyl and carbonyl oxygen atoms. Concerning furan reactions, beta-trifluoromethyl enone 14 afforded Diels Alder adducts with high facial selectivity in the presence of the Lewis acid, but beta-non-substituted enones 9 and 12 yielded products of furan conjugate addition to the double bond. (C) 2012 Elsevier Ltd. All rights reserved.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | MAESTRO-RUBIO, MARIA CARMEN | Mujer |
UNIV AUTONOMA MADRID - España
|
| 1 | Maestro, M. Carmen | - |
Universidad Autónoma de Madrid - España
UNIV AUTONOMA MADRID - España |
| 2 | FERNANDEZ-SALAS, JOSE ANTONIO | Hombre |
UNIV AUTONOMA MADRID - España
Universidad Autónoma de Madrid - España |
| 2 | Antonio Fernandez-Salas, Jose | - |
UNIV AUTONOMA MADRID - España
|
| 3 | GARCIA-RUANO, JOSE LUIS | Hombre |
UNIV AUTONOMA MADRID - España
Universidad Autónoma de Madrid - España |
| 4 | RAMIREZ-RODRIGUEZ, ONEY OSCAR | - |
UNIV AUTONOMA MADRID - España
Universidad de Chile - Chile Universidad Autónoma de Madrid - España |
| 5 | ARAYA-MATURANA, RAMIRO JUAN | Hombre |
Universidad de Chile - Chile
|
| Agradecimiento |
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| Financial support of this work by Spanish Government (grant CTQ2009-12168) and Comunidad Autonoma de Madrid (AVANCAT S2009/PPQ1634) is gratefully acknowledged. J. A. F.-S. thanks Comunidad Autonoma de Madrid (AVANCAT S2009/PPQ1634) for a predoctoral contract. |
| Financial support of this work by the Spanish Government (grant CTQ2009-12168 ) and Comunidad Autónoma de Madrid ( AVANCAT S2009/PPQ1634 ) is gratefully acknowledged. J. A. F.-S. thanks Comunidad Autónoma de Madrid (AVANCAT S2009/PPQ1634) for a predoctoral contract. |