Search Results - "Martín Castro, Ana M"

Claisen Rearrangement over the Past Nine Decades by Martin Castro, Ana M

“…Castro provides a general overview covering the most relevant topics related to the Claisen rearrangement, starting from its first publication by Ludwig…”
Get full text

Asymmetric Synthesis of Benzylic Quaternary Difunctionalized Carbons Mediated by a Remote Sulfinyl Group by García Ruano, José Luis, Torrente, Esther, Martín-Castro, Ana M

“…Enantiomerically enriched α-aryl α-cyanoacetates and α-aryl α-acylacetonitriles bearing a benzylic quaternary stereocenter have been readily synthesized by…”
Get full text

Stereodivergent Quaternization of 2-Alkyl-2-p-tolylsulfinylacetonitriles: NMR Spectroscopic Evidence of Planar and Pyramidal Benzylic Carbanions by García Ruano, José Luis, Martín-Castro, Ana M., Tato, Francisco, Torrente, Esther, Poveda, Ana M.

“…Enantiomerically enriched α,α‐disubstituted phenylacetonitriles have been readily prepared by stereoselective quaternization of…”
Get full text

Synthesis of Enantiomerically Pure anti-1,2-Diaryl and syn-1,2-Alkylaryl vic-Selenoamines by García Ruano, José L, Torrente, Esther, Alonso, Inés, Rodriguez, Mercedes, Martín-Castro, Ana M, Degl’Innocenti, Alessandro, Frateschi, Lucrezia, Capperucci, Antonella

“…Phenylselenyl benzylcarbanion stabilized by an (S)-2-p-tolylsulfinyl group evolves in a highly stereoselective way in the reactions with…”
Get full text

Asymmetric Intramolecular Pauson–Khand Reaction Mediated by a Remote Sulfenyl or Sulfinyl Group by García Ruano, José Luis, Torrente, Esther, Parra, Alejandro, Alemán, José, Martín-Castro, Ana M

“…In this work, we report the use of the asymmetric intramolecular Pauson–Khand reactions of 4-aryl-4-cyano-1,6-enynes for obtaining enantiomerically enriched…”
Get full text

Use of Lithiated Chiral o‑Sulfinylbenzyl Carbanions for the One-Pot Building of Linear Fragments Containing up to Four Connected Stereocenters by García Ruano, José Luis, Torrente, Esther, Martín-Castro, Ana M

“…The reaction of o-sulfinylbenzyl carbanions with prochiral Michael acceptors, such as differently sized cycloalkenones, proceeded with high levels of…”
Get full text

The Role of the Sulfinyl Group on the Course of the Reactions of 3-p-Tolylsulfinylfuran-2(5H)-ones with Nitrones. Synthetic Uses of Cycloreversion Processes by García Ruano, José L, Fraile, Alberto, Martín Castro, Ana M, Martín, M. Rosario

“…The reaction of enantiopure 3-p-tolylsulfinylfuran-2(5H)-ones (2a and 2b) with cyclic (4) and acyclic (6) nitrones afforded furoisoxazolidines (5 and 7) in…”
Get full text

Stereoselective Quaternization of α-Amino Phenylacetonitriles Mediated by a Remote Sulfinyl Group by García Ruano, José Luis, Martín-Castro, Ana M, Tato, Francisco, Alonso, Inés

“…Enantiomerically pure α-substituted α-amino phenylacetonitriles have been readily prepared from 2-p-tolylsulfinylbenzaldimines following a two-step sequence: …”
Get full text

Stereoselective synthesis of 2,3-epoxy alcohols mediated by a remote sulfinyl group by García Ruano, José Luis, Martín-Castro, Ana M., Tato, Francisco, Torrente, Esther, Tocco, M. Giovanna, Florio, Saverio, Capriati, Vito

“…The influence of the sulfinyl group as a chiral auxiliary in the stereoselective addition of oxiranyllithiums to ( S)-2- p-tolylsulfinylbenzaldehyde has been…”
Get full text

Influence of an ortho-sulfinyl group on the configurational stability of α-lithiated aryloxiranes: deuteration of tolylsulfinyl styrene oxides by Capriati, Vito, Florio, Saverio, Renzo Luisi, Salomone, Antonio, Tocco, Maria Giovanna, Martín Castro, Ana M., García Ruano, José Luis, Torrente, Esther

“…The influence of the p-tolylsulfinyl group, located at ortho-, meta-, and para-position, on the regio- and stereoselectivity of the deuteration reactions of…”
Get full text

Synthesis of Ladderanes by Nickel‐Catalyzed Cyclodimerization of Allenynes: Scope and Mechanism by Nieto‐Carmona, Juan C., Quirós, M. Teresa, Arribas‐Álvarez, Iván, Pérez‐Maseda, Fernando, van der Kolk, Marnix R., Martín Castro, Ana M., Labrador‐Santiago, Jorge, Buñuel, Elena, Cárdenas, Diego J.

“…Abstract We have developed a Ni‐catalyzed cyclodimerization of 1,6‐allenyenes which affords pentacyclic derivatives containing a [3]‐ladderane. Six new…”
Get full text

Cyclic Vinyl p-Tolyl Sulfilimines as Chiral Dienophiles:  Diels−Alder Reactions with Furan and Acyclic Dienes by García Ruano, José L, Alemparte, Carlos, Clemente, Fernando R, González Gutiérrez, Lorena, Gordillo, Ruth, Martín Castro, Ana M, Rodríguez Ramos, Jesús H

“…The dienophilic behavior of the sulfilimine 2, synthesized from (Z)-3-p-tolylsulfinylacrylonitrile 1, in its Diels−Alder reactions with furan and acyclic…”
Get full text

Cyclic Vinyl p-Tolyl Sulfilimines as Chiral Dienophiles:  Theoretical Study on the Stereoselectivity, Lewis Acid Catalysis, and Solvent Effects in Their Diels−Alder Reactions by García Ruano, José L, Clemente, Fernando R, González Gutiérrez, Lorena, Gordillo, Ruth, Martín Castro, Ana M, Rodríguez Ramos, Jesús H

“…The theoretical study reported in the present work deals with chiral cyclic vinyl sulfilimines and their reactivity as dienophiles in [4 + 2] cycloaddition…”
Get full text

Synthesis of Enantiopure 1,5-Enynes and 1,5-Diynes with Propargylic Quaternary Centers by Pérez, Ignacio, Yuste, Francisco, Sánchez-Obregón, Rubén, Toscano, Rubén A., Alemán, José, Marzo, Leyre, Martín Castro, Ana M., Alonso, Inés, García Ruano, José Luis

“…Diastereoselective quaternization of ortho‐sulfinylbenzyl‐methylpropargylic carbanions has been carried out with various allylic, propargylic, and benzylic…”
Get full text

Stereoselective Michael additions of lithiated ortho-sulfinylbenzyl carbanions derived from [alpha]-amino nitriles by García Ruano, José Luis, Martín-Castro, Ana M, Moreno, Laura, Tato, Francisco, Torrente, Esther

“…The reactions proceeded with high levels of stereoselectivity, generating molecules containing up to three asymmetric carbon centers in just one synthetic…”
Get full text

Stereoselective Michael additions of lithiated ortho-sulfinylbenzyl carbanions derived from α-amino nitriles by García Ruano, José Luis, Martín-Castro, Ana M., Moreno, Laura, Tato, Francisco, Torrente, Esther

“…Enantiomerically pure α -substituted α -amino ortho-sulfinylphenylacetonitriles have been readily prepared by the reaction of diastereoisomeric mixtures of α…”
Get full text

Efficient Synthesis of Enantiomerically Pure α-Alkyl Cyclopropanecarbonitrile Derivatives from Pyrazolines by García Ruano, José L, Alonso de Diego, Sergio A, Martín, M. Rosario, Torrente, Esther, Martín Castro, Ana M

“…Thermolysis of enantiopure sulfonyl pyrazolines 4 and 5, easily obtained from (Z)-3-p-tolylsulfinylacrylonitriles (1), afforded sulfonyl cyclopropanes (6, 7)…”
Get full text

New Strategy for the Asymmetric Synthesis of Phenyl Ketone Cyanohydrins:  Quaternization of Cyanohydrins Derived from 2-p-Tolylsulfinyl Benzaldehyde by García Ruano, José Luis, Martín-Castro, Ana M, Tato, Francisco, Pastor, César J

“…Optically pure functionalized cyanohydrins derived from 1-[2-(p-tolylsulfinyl)phenyl] ethanone can be obtained by the reaction of 2-p-tolylsulfinyl…”
Get full text

(Z)-3-p-Tolylsulfinylacrylonitriles as Chiral Dipolarophiles:  Reactions with Diazoalkanes by García Ruano, José L, Alonso de Diego, Sergio A, Blanco, Daniel, Martín Castro, Ana M, Rosario Martín, M, Rodríguez Ramos, Jesús H

“…The dipolarophilic reactivity of enantiopure (Z)-3-p-tolylsulfinylacrylonitriles (1) has been evaluated with diazoalkanes. 3-Cyanopyrazoles are obtained when R…”
Get full text

Asymmetric 1,3-dipolar cycloadditions of diazoalkanes to (5 S, SS)-5-[( 1R)-menthyloxy]-4-phenylsulfinyl (and phenylsulfonyl)furan-2(5 H)-ones by Garcı́a Ruano, José L., Bercial, Fernando, González, Gemma, Martı́n Castro, Ana M., Martı́n, M.Rosario

“…The behavior of the title compounds in their reactions with diazomethane and diazoethane is reported. The reactivity of the 5-alkoxyfuran-2(5 H)-ones as…”
Get full text