1
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Lim SH, You H, Kim MJ, Wee KR, Cho DW. Triplet Energy Transfer (EnT)-Promoted 1,3-Dipolar Cycloaddition Reactions of N-(Trimethylsilyl)methylphthalimide with Electron-Deficient Alkynes and Alkenes. J Org Chem 2024. [PMID: 39225314 DOI: 10.1021/acs.joc.4c01287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Triplet energy transfer (EnT)-promoted photochemical pathways, arisen by visible light and its photosensitizers, have gained significant attention as a complementary strategy for initiating organic transformations in photochemical reactions that are unlikely to occur through a single electron transfer (SET) process. In the present study, we investigated the triplet EnT-promoted 1,3-dipolar cycloaddition reactions of N-(trimethylsilyl)methylphthalimide with electron-deficient alkynyl and alkenyl dipolarophiles. The triplet excited state of N-(trimethylsilyl)methylphthalimide, promoted by the triplet EnT from thioxanthone (TXA) photosensitizer, underwent sequential intramolecular SET and carbon-to-oxygen migration of the silyl group to form azomethine ylide. This generated ylide cycloadded to alkynes or alkenes to regioselectively and stereospecifically produce a nitrogen-containing benzopyrrolizidine scaffold with multiple stereogenic centers. Crucially, the stereoselectivity of these cycloaddition reactions (i.e., endo versus exo addition) was influenced by the nature of the dipolarophiles.
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Affiliation(s)
- Suk Hyun Lim
- Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Hayeon You
- Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Min-Ji Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Republic of Korea
| | - Kyung-Ryang Wee
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Republic of Korea
| | - Dae Won Cho
- Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
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2
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Yan L, Huang G, Wang H, Xiong F, Peng H, Chen F. Squaramide-Linked Chloramphenicol Base Hybrid Catalysts for the Asymmetric Michael Addition of 2,3-Dihydrobenzofuran-2-carboxylates to Nitroolefins. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701485] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Linjie Yan
- Department of Chemistry; Fudan University; 200433 Shanghai P. R. China
| | - Guanxin Huang
- Department of Chemistry; Fudan University; 200433 Shanghai P. R. China
| | - Haifeng Wang
- Department of Chemistry; Fudan University; 200433 Shanghai P. R. China
| | - Fangjun Xiong
- Department of Chemistry; Fudan University; 200433 Shanghai P. R. China
| | - Haihui Peng
- Department of Chemistry; Fudan University; 200433 Shanghai P. R. China
| | - Fener Chen
- Department of Chemistry; Fudan University; 200433 Shanghai P. R. China
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3
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Ben Ayed K, Laurent MY, Martel A, Selim KB, Abid S, Dujardin G. Enantioselective 1,3-Dipolar Cycloaddition Reactions of C
-Carboxy Ketonitrones and Enals with MacMillan Catalysts: Evidence of a Nonconcerted Mechanism. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701307] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kawther Ben Ayed
- IMMM UMR CNRS 6283; Faculté des Sciences; Université du Maine; 72085 Le Mans France
- Laboratoire de Chimie Appliquée; Faculté des Sciences; Faculté des Sciences, Université de Sfax; 3000 Sfax Tunisia
| | - Mathieu Y. Laurent
- IMMM UMR CNRS 6283; Faculté des Sciences; Université du Maine; 72085 Le Mans France
| | - Arnaud Martel
- IMMM UMR CNRS 6283; Faculté des Sciences; Université du Maine; 72085 Le Mans France
| | - Khalid B. Selim
- Department of Pharmaceutical Organic Chemistry; Faculty of Pharmacy, Mansoura University; 35516 Mansoura Egypt
| | - Souhir Abid
- Laboratoire de Chimie Appliquée; Faculté des Sciences; Faculté des Sciences, Université de Sfax; 3000 Sfax Tunisia
| | - Gilles Dujardin
- IMMM UMR CNRS 6283; Faculté des Sciences; Université du Maine; 72085 Le Mans France
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4
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Mahule SR. Axially chiral benzimidazolium based silver(I) and gold(I) bis-NHC complexes of R-BINOL scaffold: synthesis, characterization and DFT studies. J CHEM SCI 2017. [DOI: 10.1007/s12039-017-1352-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Zhang M, Kumagai N, Shibasaki M. α,β‐Unsaturated Amides as Dipolarophiles: Catalytic Asymmetric
exo
‐Selective 1,3‐Dipolar Cycloaddition with Nitrones. Chemistry 2017; 23:12450-12455. [DOI: 10.1002/chem.201702330] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Ming Zhang
- Institute of Microbial Chemistry (BIKAKEN), Tokyo 3-14-23 Kamiosaki, Shinagawa-ku Tokyo 141-0021 Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN), Tokyo 3-14-23 Kamiosaki, Shinagawa-ku Tokyo 141-0021 Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN), Tokyo 3-14-23 Kamiosaki, Shinagawa-ku Tokyo 141-0021 Japan
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6
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Gorla L, Martí-Centelles V, Altava B, Burguete MI, Luis SV. Cu 2+ recognition by N,N'-benzylated bis(amino amides). Dalton Trans 2017; 46:2660-2669. [PMID: 28168262 DOI: 10.1039/c6dt04756d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two new C2-symmetric N,N'-benzylated bis(amino amides) have been synthesised and their interaction with different transition metals studied using a variety of techniques including UV-Vis and CD spectroscopy or ESI-MS. The determination of the corresponding stability constants with Cu2+ has been possible, in H2O/CH3CN 7/3 v/v, for one of these ligands (4) using potentiometric titrations. The results obtained reveal that N-benzylation affords significant changes to their properties and is accompanied by an appreciable decrease in the corresponding complexation stability constants. However, this, along with the low kinetics associated to Ni2+, facilitates the recognition of Cu2+ by 4 that can be followed by the naked-eye up to the submillimolar range. Very interestingly, the chiral nature of this ligand provides an intense and well defined CD curve for the corresponding Cu2+ complex, very sensitive to the coordination geometry, facilitating the analysis of this interaction even at the μM range. The formation by both ligands (3 and 4) of square planar complexes with Cu2+ and Ni2+ displaying a 1 : 1 stoichiometry was confirmed by their X-ray crystal structures.
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Affiliation(s)
- Lingaraju Gorla
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain.
| | - Vicente Martí-Centelles
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain.
| | - Belén Altava
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain.
| | - M Isabel Burguete
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain.
| | - Santiago V Luis
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n., 12071 Castellón, Spain.
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7
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Berthet M, Cheviet T, Dujardin G, Parrot I, Martinez J. Isoxazolidine: A Privileged Scaffold for Organic and Medicinal Chemistry. Chem Rev 2016; 116:15235-15283. [PMID: 27981833 DOI: 10.1021/acs.chemrev.6b00543] [Citation(s) in RCA: 169] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The isoxazolidine ring represents one of the privileged structures in medicinal chemistry, and there have been an increasing number of studies on isoxazolidine and isoxazolidine-containing compounds. Optimization of the 1,3-dipolar cycloaddition (1,3-DC), original methods including electrophilic or palladium-mediated cyclization of unsaturated hydroxylamine, has been developed to obtain isoxazolidines. Novel reactions involving the isoxazolidine ring have been highlighted to accomplish total synthesis or to obtain bioactive compounds, one of the most significant examples being probably the thermic ring contraction applied to the total synthesis of (±)-Gelsemoxonine. The unique isoxazolidine scaffold also exhibits an impressive potential as a mimic of nucleosides, carbohydrates, PNA, amino acids, and steroid analogs. This review aims to be a comprehensive and general summary of the different isoxazolidine syntheses, their use as starting building blocks for the preparation of natural compounds, and their main biological activities.
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Affiliation(s)
- Mathéo Berthet
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Thomas Cheviet
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Gilles Dujardin
- Institut des Molécules et Matériaux du Mans , IMMM UMR 6283 CNRS, Université du Maine, UFR Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans, France
| | - Isabelle Parrot
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Jean Martinez
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
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8
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Gorla L, Martí-Centelles V, Freimuth L, Altava B, Burguete MI, Luis SV. Cu(2+), Zn(2+), and Ni(2+) Complexes of C2-Symmetric Pseudopeptides with an Aromatic Central Spacer. Inorg Chem 2016; 55:7617-29. [PMID: 27438410 DOI: 10.1021/acs.inorgchem.6b01066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Two new tetradentate C2-symmetric pseudopeptidic ligands derived from Val and Phe containing two amino and two amido groups and a central o-substituted aromatic spacer have been prepared. Their complexes with Cu(2+), Zn(2+), and Ni(2+) have been studied by potentiometry, UV-vis spectrophotometry, FT-IR, and ESI-MS. The presence of the aromatic spacer provides Cu(2+) complexes with stability constants several orders of magnitude higher than those observed for related ligands containing aliphatic central spacers. Besides, the formation of [MH-2L] complex species is favored. Crystal structures for the corresponding Cu(2+) and Ni(2+) have been obtained, revealing the metal atom in an essentially square-planar geometry, although, in several instances, the oxygen atom of an amide carbonyl of a second complex species can act as a fifth coordination site. In the case of Zn(2+), the only crystal structure obtained displays a square-pyramidal arrangement of the metal center. Finally, preliminary experiments show the catalytic activity of some of these complexes, in particular, Zn(2+) complexes, for epoxide ring-opening with using aniline as the nucleophile in a ligand accelerated process.
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Affiliation(s)
- Lingaraju Gorla
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Vicente Martí-Centelles
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Lena Freimuth
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Belén Altava
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - M Isabel Burguete
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
| | - Santiago V Luis
- Departamento de Química Inorgánica y Orgánica, Universitat Jaume I , Av. de Vicent Sos Baynat, s/n, 12071, Castellón, Spain
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9
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Reddy UVS, Chennapuram M, Seki C, Kwon E, Okuyama Y, Nakano H. Catalytic Efficiency of Primary β-Amino Alcohols and Their Derivatives in Organocatalysis. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600164] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ummareddy Venkata Subba Reddy
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Madhu Chennapuram
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Chigusa Seki
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules; Graduate School of Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku 980-8578 Sendai Japan
| | - Yuko Okuyama
- Tohoku Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
| | - Hiroto Nakano
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
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10
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Singh MS, Chowdhury S, Koley S. Progress in 1,3-dipolar cycloadditions in the recent decade: an update to strategic development towards the arsenal of organic synthesis. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.031] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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11
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Nakano H, Kumagai J, V. Subba Reddy U, Seki C, Okuyama Y, Kwon E. Development of Asymmetric Cycloaddition Reaction Using Amino Alcohol and its Derivative as an Organocatalyst. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Otsuki T, Kumagai J, Kohari Y, Okuyama Y, Kwon E, Seki C, Uwai K, Mawatari Y, Kobayashi N, Iwasa T, Tokiwa M, Takeshita M, Maeda A, Hashimoto A, Turuga K, Nakano H. Silyloxy Amino Alcohol Organocatalyst for Enantioselective 1,3-Dipolar Cycloaddition of Nitrones to α,β-Unsaturated Aldehydes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500926] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Hashimoto T, Maruoka K. Recent advances of catalytic asymmetric 1,3-dipolar cycloadditions. Chem Rev 2015; 115:5366-412. [PMID: 25961125 DOI: 10.1021/cr5007182] [Citation(s) in RCA: 740] [Impact Index Per Article: 82.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Takuya Hashimoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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14
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Wadhavane PD, Gorla L, Ferrer A, Altava B, Burguete MI, Izquierdo MÁ, Luis SV. Coordination behaviour of new open chain and macrocyclic peptidomimetic compounds with copper(ii). RSC Adv 2015. [DOI: 10.1039/c5ra15852d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Two valine-derived bis(amino amides) ligands have been prepared and fully characterized.
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Affiliation(s)
- Prashant D. Wadhavane
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Lingaraju Gorla
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Armando Ferrer
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Belén Altava
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - M. Isabel Burguete
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - M. Ángeles Izquierdo
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
| | - Santiago V. Luis
- Departament of Inorganic and Organic Chemistry
- Universitat Jaume I
- Campus del Riu Sec
- Castellón
- Spain
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15
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Selim KB, Martel A, Laurent MY, Lhoste J, Py S, Dujardin G. Enantioselective Ruthenium-Catalyzed 1,3-Dipolar Cycloadditions between C-Carboalkoxy Ketonitrones and Methacrolein: Solvent Effect on Reaction Selectivity and Its Rational. J Org Chem 2014; 79:3414-26. [DOI: 10.1021/jo5001737] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Khalid B. Selim
- LUNAM Université du Maine, Institut Molécules et Matériaux du Mans, UMR 6283 CNRS,
Faculté des Sciences, 72085 Le Mans, Cedex 9, France
- Department
of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Arnaud Martel
- LUNAM Université du Maine, Institut Molécules et Matériaux du Mans, UMR 6283 CNRS,
Faculté des Sciences, 72085 Le Mans, Cedex 9, France
| | - Mathieu Y. Laurent
- LUNAM Université du Maine, Institut Molécules et Matériaux du Mans, UMR 6283 CNRS,
Faculté des Sciences, 72085 Le Mans, Cedex 9, France
| | - Jérôme Lhoste
- LUNAM Université du Maine, Institut Molécules et Matériaux du Mans, UMR 6283 CNRS,
Faculté des Sciences, 72085 Le Mans, Cedex 9, France
| | - Sandrine Py
- Département
de Chimie Moléculaire (SERCO) UMR 5250, ICMG FR-2607, CNRS-Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 09, France
| | - Gilles Dujardin
- LUNAM Université du Maine, Institut Molécules et Matériaux du Mans, UMR 6283 CNRS,
Faculté des Sciences, 72085 Le Mans, Cedex 9, France
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Abstract
For years researchers have tried to understand the molecular behavior of complex biomolecules through the development of small molecules that can partially mimic their function. Now researchers are implementing the reverse approach: using the structural and mechanistic knowledge obtained from those complex systems to design small molecules with defined properties and for specific applications. One successful strategy for constructing bioinspired, minimalistic molecules is to combine natural building blocks that provide functional elements with abiotic fragments that serve as structural scaffolds. Therefore pseudopeptidic compounds, most of them based on C2 symmetric structures, represent a unique opportunity to explore and evaluate this approach. Some of these molecules are as simple as two amino acids connected by a diamino spacer. The results in this Account show how bioinspired minimalistic pseudopeptides can form ordered structures, participate in the recognition and transcription of information events in molecular devices, and catalyze reactions. This strategy allows researchers to design and prepare a variety of open-chain and macrocyclic compounds leading to systems that can self-aggregate to form hierarchically ordered micro- and nanostructures. In addition, small changes in the molecule or external stimuli can regulate the self-aggregation pattern. In the same way, researchers can also tune the molecular movements of simple pseudopeptides through environmental factors, providing a means to control new molecular devices. In addition, some of the prepared model compounds have shown interesting properties in molecular recognition and even as sensors for several targets of interest. Finally we have observed remarkable catalytic activities from these types of molecules, although those results are still far from the efficiency shown by natural peptides. This family of pseudopeptidic compounds offers the opportunity for the more elaborate design of relatively simple abiotic but bioinspired systems that display specific properties. In addition, the results can provide additional information that will increase the molecular understanding of the basic principles that underlie the extraordinary behavior of natural systems.
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Affiliation(s)
- Santiago V. Luis
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Castellón. Spain
| | - I. Alfonso
- Department of Biological Chemistry and Molecular Modeling, IQAC−CSIC, Barcelona, Spain
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17
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Scheffler U, Mahrwald R. Recent Advances in Organocatalytic Methods for Asymmetric CC Bond Formation. Chemistry 2013; 19:14346-96. [DOI: 10.1002/chem.201301996] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Organocatalytic enantio- and diastereoselective 1,3-dipolar cycloaddition between alanine-derived ketonitrones and E-crotonaldehyde: efficiency and full stereochemical studies. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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20
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21
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Weseliński Ł, Kalinowska E, Jurczak J. The asymmetric organocatalytic 1,3-dipolar cycloaddition of alkyl pyruvate-derived nitrones and α,β-unsaturated aldehydes. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.02.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Luis García Ruano J, Fraile A, Núñez A, Rosario Martín M, Alonso I. C-[o-(p-Tolyl)sulfinyl]phenylnitrones. Synthesis and Reactivity in [3+2] Dipolar Cycloadditions. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)72] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Thiverny M, Farran D, Philouze C, Blandin V, Chavant PY. Totally diastereoselective addition of aryl Grignard reagents to the nitrone-based chiral glycine equivalent MiPNO. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.07.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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