The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Carmen Concellon - One of the best experts on this subject based on the ideXlab platform.
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highly enantioselective synthesis of α azido β hydroxy methyl ketones catalyzed by a cooperative proline Guanidinium Salt system
ChemInform, 2014Co-Authors: Angel Martinezcastaneda, Humberto Rodriguezsolla, Kinga Kedziora, Ivan Lavandera, Carmen ConcellonAbstract:The first enantioselective synthesis of α-azido-β-hydroxy ketones via direct intermolecular aldol reaction of azidoacetone and aromatic aldehydes is described.
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Highly Enantioselective Synthesis of α-Azido-β-hydroxy Methyl Ketones Catalyzed by a Cooperative Proline—Guanidinium Salt System.
ChemInform, 2014Co-Authors: Angel Martinez‐castaneda, Humberto Rodriguez‐solla, Ivan Lavandera, Kinga Kędziora, Carmen ConcellonAbstract:The first enantioselective synthesis of α-azido-β-hydroxy ketones via direct intermolecular aldol reaction of azidoacetone and aromatic aldehydes is described.
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Highly enantioselective synthesis of α-azido-β-hydroxy methyl ketones catalyzed by a cooperative proline–Guanidinium Salt system
Chemical Communications, 2014Co-Authors: Angel Martinez‐castaneda, Humberto Rodriguez‐solla, Ivan Lavandera, Kinga Kędziora, Carmen ConcellonAbstract:The combined activity of (S)-proline and an achiral tetraphenylborate TBD-derived Guanidinium Salt permits the aldol reaction between azidoacetone and aromatic, or heteroaromatic aldehydes. The α-azido-β-hydroxy methyl ketones obtained as products can be isolated in good yield, with high diastereo- and enantioselectivity.
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highly enantioselective synthesis of α azido β hydroxy methyl ketones catalyzed by a cooperative proline Guanidinium Salt system
Chemical Communications, 2014Co-Authors: Angel Martinezcastaneda, Humberto Rodriguezsolla, Kinga Kedziora, Ivan Lavandera, Carmen ConcellonAbstract:The combined activity of (S)-proline and an achiral tetraphenylborate TBD-derived Guanidinium Salt permits the aldol reaction between azidoacetone and aromatic, or heteroaromatic aldehydes. The α-azido-β-hydroxy methyl ketones obtained as products can be isolated in good yield, with high diastereo- and enantioselectivity.
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Switching Diastereoselectivity in Proline-Catalyzed Aldol Reactions
Journal of Organic Chemistry, 2012Co-Authors: Angel Martinez‐castaneda, Humberto Rodriguez‐solla, Carmen ConcellonAbstract:The choice of the anion of an achiral TBD-derived Guanidinium Salt, used as cocatalyst for proline, allows reacting cycloketones with aromatic aldehydes and preparing either anti- or syn-aldol adducts with very high enantioselectivity. As a proof of principle, we show how the judicious choice of an additive allows individual access to all possible products, thus controlling the stereochemical outcome of the asymmetric aldol reaction. The origin of the syn diastereoselectivity unfolds from an unusual equilibrium process coupled to the enamine-based catalytic cycle standard for proline.
Angel Martinezcastaneda - One of the best experts on this subject based on the ideXlab platform.
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highly enantioselective synthesis of α azido β hydroxy methyl ketones catalyzed by a cooperative proline Guanidinium Salt system
ChemInform, 2014Co-Authors: Angel Martinezcastaneda, Humberto Rodriguezsolla, Kinga Kedziora, Ivan Lavandera, Carmen ConcellonAbstract:The first enantioselective synthesis of α-azido-β-hydroxy ketones via direct intermolecular aldol reaction of azidoacetone and aromatic aldehydes is described.
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highly enantioselective synthesis of α azido β hydroxy methyl ketones catalyzed by a cooperative proline Guanidinium Salt system
Chemical Communications, 2014Co-Authors: Angel Martinezcastaneda, Humberto Rodriguezsolla, Kinga Kedziora, Ivan Lavandera, Carmen ConcellonAbstract:The combined activity of (S)-proline and an achiral tetraphenylborate TBD-derived Guanidinium Salt permits the aldol reaction between azidoacetone and aromatic, or heteroaromatic aldehydes. The α-azido-β-hydroxy methyl ketones obtained as products can be isolated in good yield, with high diastereo- and enantioselectivity.
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direct aldol reactions catalyzed by a heterogeneous Guanidinium Salt proline system under solvent free conditions
ChemInform, 2011Co-Authors: Angel Martinezcastaneda, Belen Poladura, Humberto Rodriguezsolla, Carmen ConcellonAbstract:The reaction of various aromatic aldehydes with cyclic ketones or acetone is effectively catalyzed by the title system.
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direct aldol reactions catalyzed by a heterogeneous Guanidinium Salt proline system under solvent free conditions
Organic Letters, 2011Co-Authors: Angel Martinezcastaneda, Belen Poladura, Humberto Rodriguezsolla, Carmen ConcellonAbstract:The combined activity of (S)-proline and an achiral cocatalyst (a TBD-derived Guanidinium Salt) allow direct aldol reactions to be carried out with high diastereoselectivity and enantioselectivity ...
Maryam Farhang - One of the best experts on this subject based on the ideXlab platform.
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Protic [TBD][TFA] ionic liquid as a reusable and highly efficient catalyst for N-formylation of amines using formic acid under solvent-free condition
Journal of Molecular Liquids, 2013Co-Authors: Seyed Meysam Baghbanian, Maryam FarhangAbstract:Abstract Trifluoroacetate Guanidinium Salt [TBD][TFA] ionic liquid was used as a recyclable and reusable catalyst for the synthesis of formamides. Primary and secondary amines were reacted with formic acid to afford N-formyl derivatives in high yield under solvent-free condition at room temperature.
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Protic [TBD][TFA] ionic liquid as a reusable and highly efficient catalyst for N-formylation of amines using formic acid under solvent-free condition
Journal of Molecular Liquids, 2013Co-Authors: Seyed Meysam Baghbanian, Maryam FarhangAbstract:Trifluoroacetate Guanidinium Salt [TBD][TFA] ionic liquid was used as a recyclable and reusable catalyst for the synthesis of formamides. Primary and secondary amines were reacted with formic acid to afford N-formyl derivatives in high yield under solvent-free condition at room temperature. © 2013 Elsevier B.V.
Humberto Rodriguezsolla - One of the best experts on this subject based on the ideXlab platform.
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highly enantioselective synthesis of α azido β hydroxy methyl ketones catalyzed by a cooperative proline Guanidinium Salt system
ChemInform, 2014Co-Authors: Angel Martinezcastaneda, Humberto Rodriguezsolla, Kinga Kedziora, Ivan Lavandera, Carmen ConcellonAbstract:The first enantioselective synthesis of α-azido-β-hydroxy ketones via direct intermolecular aldol reaction of azidoacetone and aromatic aldehydes is described.
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highly enantioselective synthesis of α azido β hydroxy methyl ketones catalyzed by a cooperative proline Guanidinium Salt system
Chemical Communications, 2014Co-Authors: Angel Martinezcastaneda, Humberto Rodriguezsolla, Kinga Kedziora, Ivan Lavandera, Carmen ConcellonAbstract:The combined activity of (S)-proline and an achiral tetraphenylborate TBD-derived Guanidinium Salt permits the aldol reaction between azidoacetone and aromatic, or heteroaromatic aldehydes. The α-azido-β-hydroxy methyl ketones obtained as products can be isolated in good yield, with high diastereo- and enantioselectivity.
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direct aldol reactions catalyzed by a heterogeneous Guanidinium Salt proline system under solvent free conditions
ChemInform, 2011Co-Authors: Angel Martinezcastaneda, Belen Poladura, Humberto Rodriguezsolla, Carmen ConcellonAbstract:The reaction of various aromatic aldehydes with cyclic ketones or acetone is effectively catalyzed by the title system.
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direct aldol reactions catalyzed by a heterogeneous Guanidinium Salt proline system under solvent free conditions
Organic Letters, 2011Co-Authors: Angel Martinezcastaneda, Belen Poladura, Humberto Rodriguezsolla, Carmen ConcellonAbstract:The combined activity of (S)-proline and an achiral cocatalyst (a TBD-derived Guanidinium Salt) allow direct aldol reactions to be carried out with high diastereoselectivity and enantioselectivity ...
Seyed Meysam Baghbanian - One of the best experts on this subject based on the ideXlab platform.
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Protic [TBD][TFA] ionic liquid as a reusable and highly efficient catalyst for N-formylation of amines using formic acid under solvent-free condition
Journal of Molecular Liquids, 2013Co-Authors: Seyed Meysam Baghbanian, Maryam FarhangAbstract:Abstract Trifluoroacetate Guanidinium Salt [TBD][TFA] ionic liquid was used as a recyclable and reusable catalyst for the synthesis of formamides. Primary and secondary amines were reacted with formic acid to afford N-formyl derivatives in high yield under solvent-free condition at room temperature.
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Protic [TBD][TFA] ionic liquid as a reusable and highly efficient catalyst for N-formylation of amines using formic acid under solvent-free condition
Journal of Molecular Liquids, 2013Co-Authors: Seyed Meysam Baghbanian, Maryam FarhangAbstract:Trifluoroacetate Guanidinium Salt [TBD][TFA] ionic liquid was used as a recyclable and reusable catalyst for the synthesis of formamides. Primary and secondary amines were reacted with formic acid to afford N-formyl derivatives in high yield under solvent-free condition at room temperature. © 2013 Elsevier B.V.
