1
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Gebhard J, Hirsch L, Schwechheimer C, Wagenknecht HA. Hybridization-Sensitive Fluorescent Probes for DNA and RNA by a Modular "Click" Approach. Bioconjug Chem 2022; 33:1634-1642. [PMID: 35995426 PMCID: PMC9501807 DOI: 10.1021/acs.bioconjchem.2c00241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Fluorescent DNA probes were prepared in a modular approach
using
the “click” post-synthetic modification strategy. The
new glycol-based module and DNA building block place just two carbons
between the phosphodiester bridges and anchor the dye by an additional
alkyne group. This creates a stereocenter in the middle of this artificial
nucleoside substitute. Both enantiomers and a variety of photostable
cyanine–styryl dyes as well as thiazole orange derivatives
were screened as “clicked” conjugates in different surrounding
DNA sequences. The combination of the (S)-configured
DNA anchor and the cyanylated cyanine–styryl dye shows the
highest fluorescence light-up effect of 9.2 and a brightness of approximately
11,000 M–1 cm–1. This hybridization
sensitivity and fluorescence readout were further developed utilizing
electron transfer and energy transfer processes. The combination of
the hybridization-sensitive DNA building block with the nucleotide
of 5-nitroindole as an electron acceptor and a quencher increases
the light-up effect to 20 with the DNA target and to 15 with the RNA
target. The fluorescence readout could significantly be enhanced to
values between 50 and 360 by the use of energy transfer to a second
DNA probe with commercially available dyes, like Cy3.5, Cy5, and Atto590,
as energy acceptors at the 5′-end. The latter binary probes
shift the fluorescent readout from the range of 500–550 nm
to the range of 610–670 nm. The optical properties make these
fluorescent DNA probes potentially useful for RNA imaging. Due to
the strong light-up effect, they will not require washing procedures
and will thus be suitable for live-cell imaging.
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Affiliation(s)
- Julian Gebhard
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Fritz-Haber-Weg 6, 7631 Karlsruhe, Germany
| | - Lara Hirsch
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Fritz-Haber-Weg 6, 7631 Karlsruhe, Germany
| | - Christian Schwechheimer
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Fritz-Haber-Weg 6, 7631 Karlsruhe, Germany
| | - Hans-Achim Wagenknecht
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry, Fritz-Haber-Weg 6, 7631 Karlsruhe, Germany
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2
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Morales-Monarca G, Gnecco D, Terán JL. Diastereoselective Functionalization of chiral N‐acyl‐1,3‐oxazolidines and Their Applications in the Synthesis of bioactive molecules. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Gerardo Morales-Monarca
- Benemérita Universidad Autónoma de Puebla: Benemerita Universidad Autonoma de Puebla Science Institute MEXICO
| | - Dino Gnecco
- Benemérita Universidad Autónoma de Puebla: Benemerita Universidad Autonoma de Puebla Science Institute MEXICO
| | - Joel L. Terán
- Benem�rita Universidad Aut�noma de Puebla Laboratorio de S�ntesis Org�nica Avenida San Claudio, Colonia San ManuelEdificio IC-9 Complejo de Ciencias,Ciudad Universitaria 72570 Puebla MEXICO
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3
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Ramos E, Lajarín-Cuesta R, Arribas RL, García-Frutos EM, González-Lafuente L, Egea J, de Los Ríos C, Romero A. In Silico Prediction of the Toxic Potential of Neuroprotective Bifunctional Molecules Based on Chiral N-Propargyl-1,2-amino Alcohol Derivatives. Chem Res Toxicol 2021; 34:1245-1249. [PMID: 33635058 PMCID: PMC8478334 DOI: 10.1021/acs.chemrestox.0c00519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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N-Propargylamines
are useful synthetic scaffolds
for the synthesis of bioactive molecules, and in addition, they possess
important pharmacological activities. We obtained several neuroprotective
molecules, chiral 1,2-amino alcohols and 1,2-diamines, able to reduce
by almost 70% the rotenone and oligomycin A-induced damage in SH-SY5Y
cells. Furthermore, some molecules assessed also counteracted the
toxicity evoked by the Ser/Thr phosphatase inhibitor okadaic acid.
Before extrapolating these data to preclinical studies, we analyze
the molecules through an in silico prediction system
to detect carcinogenicity risk or other toxic effects. In light of
these promising results, these molecules may be considered as a lead
family of neuroprotective and relatively safe compounds.
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Affiliation(s)
- Eva Ramos
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Complutense University of Madrid, 28040 Madrid, Spain
| | - Rocío Lajarín-Cuesta
- Health Research Institute, Clinical Pharmacology Service, University Hospital La Princesa, Autonomous University of Madrid, 28006 Madrid, Spain.,Institute Teófilo Hernando for Drug Discovery, Department of Pharmacology, School of Medicine, Autonomous University of Madrid, 28029 Madrid, Spain
| | - Raquel L Arribas
- Health Research Institute, Clinical Pharmacology Service, University Hospital La Princesa, Autonomous University of Madrid, 28006 Madrid, Spain.,Institute Teófilo Hernando for Drug Discovery, Department of Pharmacology, School of Medicine, Autonomous University of Madrid, 28029 Madrid, Spain
| | - Eva M García-Frutos
- Materials Science Factory,Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Laura González-Lafuente
- Cardiorenal Translational Laboratory, Institute of Research i+12, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain
| | - Javier Egea
- Health Research Institute, Clinical Pharmacology Service, University Hospital La Princesa, Autonomous University of Madrid, 28006 Madrid, Spain.,Institute Teófilo Hernando for Drug Discovery, Department of Pharmacology, School of Medicine, Autonomous University of Madrid, 28029 Madrid, Spain.,Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, 28040 Madrid, Spain
| | - Cristóbal de Los Ríos
- Health Research Institute, Clinical Pharmacology Service, University Hospital La Princesa, Autonomous University of Madrid, 28006 Madrid, Spain.,Institute Teófilo Hernando for Drug Discovery, Department of Pharmacology, School of Medicine, Autonomous University of Madrid, 28029 Madrid, Spain
| | - Alejandro Romero
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Complutense University of Madrid, 28040 Madrid, Spain
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4
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Lynch CC, Sripada A, Wolf C. Asymmetric synthesis with ynamides: unique reaction control, chemical diversity and applications. Chem Soc Rev 2020; 49:8543-8583. [PMID: 33073285 PMCID: PMC8383824 DOI: 10.1039/d0cs00769b] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ynamides are among the most powerful building blocks in organic synthesis and have become invaluable starting materials for the construction of multifunctional compounds and challenging architectures that would be difficult to prepare otherwise. The rapidly growing popularity originates from the unique reactivity and ease of manipulation of the polarized ynamide triple bond, the advance of practical methods for making them, and the simplicity of storage and handling. These attractive features and the demonstration of numerous synthetic applications have spurred the development of intriguing asymmetric reaction strategies during the last decade. An impressive variety of chemo-, regio- and stereoselective carbon-carbon and carbon-heteroatom bond forming reactions with ynamides have been developed and now significantly enrich the toolbox of synthetic chemists. This review provides a comprehensive overview of asymmetric ynamide chemistry since 2010 with a focus on the general scope, current limitations, stereochemical reaction control and mechanistic aspects.
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Affiliation(s)
- Ciarán C Lynch
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, DC 20057, USA.
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5
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Miesch L, Beltran F. Tertiary Enamides as Versatile and Valuable Substrates to Reach Chemical Diversity. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707403] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Tertiary enamides display versatile reactivity and great stability compared to their enamine congeners. This review covers progress made in the development of new methods involving the enaminic reactivity of tertiary enamides with respect to the synthesis of complex nitrogen-containing compounds. A focus on the preparation of biologically active molecules is also presented. The syntheses reported herein are classified based on their reaction type. In addition, mechanistic insights are given for most of the new transformations.1 Introduction2 [2+2] Cycloadditions3 [4+2] Cycloadditions4 Electrocyclizations and Cycloisomerizations5 Sigmatropic Rearrangements6 Nucleophilic Additions7 Tertiary Enamides as Electrophiles8 Cross-Coupling Reactions9 Tertiary-Enamide-Assisted Reactions10 Conclusion and Perspectives
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Affiliation(s)
- Laurence Miesch
- Équipe Synthèse Organique et Phytochimie, Institut de Chimie, CNRS-UdS UMR 7177
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6
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Yuan Q, Sigman MS. Palladium-Catalyzed Enantioselective Alkenylation of Enelactams Using a Relay Heck Strategy. Chemistry 2019; 25:10823-10827. [PMID: 31216370 DOI: 10.1002/chem.201902813] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Indexed: 01/14/2023]
Abstract
In this report, a palladium-catalyzed redox-relay Heck process to access optically active alkenylated α,β-unsaturated lactams is described. Under mild reaction conditions, electron-deficient alkenyl triflates and electron-rich alkenyl iodonium salts undergo enantioselective and site-selective coupling with enelactams to deliver the products in high yields and excellent enantioselectivities. Furthermore, the products allow facile access to natural products such as (+)-calvine and (+)-2-epicalvine in addition to the bioactive molecule aza-goniothalamin.
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Affiliation(s)
- Qianjia Yuan
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
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7
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Augé M, Feraldi-Xypolia A, Barbazanges M, Aubert C, Fensterbank L, Gandon V, Kolodziej E, Ollivier C. Double-Stereodifferentiation in Rhodium-Catalyzed [2 + 2 + 2] Cycloaddition: Chiral Ligand/Chiral Counterion Matched Pair. Org Lett 2015. [DOI: 10.1021/acs.orglett.5b01738] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Mylène Augé
- Sorbonne Universités, UPMC Univ Paris 06,
Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Case
229, 4 Place Jussieu, Paris 75252 Cedex 05, France
| | - Alexandra Feraldi-Xypolia
- Sorbonne Universités, UPMC Univ Paris 06,
Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Case
229, 4 Place Jussieu, Paris 75252 Cedex 05, France
| | - Marion Barbazanges
- Sorbonne Universités, UPMC Univ Paris 06,
Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Case
229, 4 Place Jussieu, Paris 75252 Cedex 05, France
| | - Corinne Aubert
- Sorbonne Universités, UPMC Univ Paris 06,
Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Case
229, 4 Place Jussieu, Paris 75252 Cedex 05, France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC Univ Paris 06,
Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Case
229, 4 Place Jussieu, Paris 75252 Cedex 05, France
| | - Vincent Gandon
- ICMMO,
UMR CNRS 8182, Univ Paris-Sud 11, 91405 Orsay, France
| | | | - Cyril Ollivier
- Sorbonne Universités, UPMC Univ Paris 06,
Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Case
229, 4 Place Jussieu, Paris 75252 Cedex 05, France
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8
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Deng Z, Wei J, Liao L, Huang H, Zhao X. Organoselenium-catalyzed, hydroxy-controlled regio- and stereoselective amination of terminal alkenes: efficient synthesis of 3-amino allylic alcohols. Org Lett 2015; 17:1834-7. [PMID: 25849818 DOI: 10.1021/acs.orglett.5b00213] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
An efficient route to prepare 3-amino allylic alcohols in excellent regio- and stereoselectivity in the presence of bases by orangoselenium catalysis has been developed. In the absence of bases α,β-unsaturated aldehydes were formed in up to 97% yield. Control experiments reveal that the hydroxy group is crucial for the direct amination.
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9
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Grigorjeva L, Kinens A, Jirgensons A. Unsaturated syn- and anti-1,2-Amino Alcohols by Cyclization of Allylic Bis-trichloroacetimidates. Stereoselectivity Dependence on Substrate Configuration. J Org Chem 2014; 80:920-7. [DOI: 10.1021/jo502404y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Liene Grigorjeva
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia
| | - Artis Kinens
- University of Latvia, 19 Rainis
Blvd., Riga LV1586, Latvia
| | - Aigars Jirgensons
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia
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10
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Leonova MV, Baimuratov MR, Klimochkin YN. Wittig rearrangement of 1-[(1E)-3-(Benzyloxy)prop-1-en-1-yl]adamantane. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2014. [DOI: 10.1134/s107042801409005x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Nocquet-Thibault S, Minard C, Retailleau P, Cariou K, Dodd RH. Iodine(III)-mediated ethoxychlorination of enamides with iron(III) chloride. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2011. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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13
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Kamptmann SB, Brückner R. Stereocontrolled Synthesis of a Cn-Cn+7Building Block (“Eastern Moiety”) for the Unnatural Enantiomers of Important Polyol,Polyene Antibiotics Based on a Ring-Closing Metathesis and an Aldol Addition of a Lactone Enolate. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300183] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Urabe F, Nagashima S, Takahashi K, Ishihara J, Hatakeyama S. Total Synthesis of (−)-Cinatrin C1 Based on an In(OTf)3-Catalyzed Conia-Ene Reaction. J Org Chem 2013; 78:3847-57. [DOI: 10.1021/jo400263w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Fumiya Urabe
- Graduate School of Biomedical
Sciences, Nagasaki University, 1-14 Bunkyo-machi,
Nagasaki 852-8521,
Japan
| | - Shunsuke Nagashima
- Graduate School of Biomedical
Sciences, Nagasaki University, 1-14 Bunkyo-machi,
Nagasaki 852-8521,
Japan
| | - Keisuke Takahashi
- Graduate School of Biomedical
Sciences, Nagasaki University, 1-14 Bunkyo-machi,
Nagasaki 852-8521,
Japan
| | - Jun Ishihara
- Graduate School of Biomedical
Sciences, Nagasaki University, 1-14 Bunkyo-machi,
Nagasaki 852-8521,
Japan
| | - Susumi Hatakeyama
- Graduate School of Biomedical
Sciences, Nagasaki University, 1-14 Bunkyo-machi,
Nagasaki 852-8521,
Japan
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15
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Brioche J, Meyer C, Cossy J. Synthesis of functionalized allenamides from ynamides by enolate Claisen rearrangement. Org Lett 2013; 15:1626-9. [PMID: 23496162 DOI: 10.1021/ol400402n] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The Claisen rearrangement of N-Boc glycinates derived from ynamido-alcohols affords an efficient and stereoselective access to highly functionalized allenamides. These compounds undergo silver-catalyzed cyclization to 3-pyrrolines which are useful precursors for the synthesis of substituted pyrrolidines.
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Affiliation(s)
- Julien Brioche
- Laboratoire de Chimie Organique, ESPCI Paris Tech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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16
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Gomes F, Fadel A, Rabasso N. [2,3]-Sigmatropic Rearrangement of Ynamides: Preparation of α-Amino Allenephosphonates. J Org Chem 2012; 77:5439-44. [DOI: 10.1021/jo300790m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Filipe Gomes
- Laboratoire
de Synthèse Organique et Méthodologie,
ICMMO, UMR CNRS 8182, Bât. 420, Université Paris-Sud, 15 rue Georges Clemenceau, 91405 Orsay Cedex,
France
| | - Antoine Fadel
- Laboratoire
de Synthèse Organique et Méthodologie,
ICMMO, UMR CNRS 8182, Bât. 420, Université Paris-Sud, 15 rue Georges Clemenceau, 91405 Orsay Cedex,
France
| | - Nicolas Rabasso
- Laboratoire
de Synthèse Organique et Méthodologie,
ICMMO, UMR CNRS 8182, Bât. 420, Université Paris-Sud, 15 rue Georges Clemenceau, 91405 Orsay Cedex,
France
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17
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Harker WRR, Carswell EL, Carbery DR. Si-free enolate Claisen rearrangements of enamido substrates. Org Biomol Chem 2012; 10:1406-10. [DOI: 10.1039/c2ob06853b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Laouiti A, Rammah MM, Rammah MB, Marrot J, Couty F, Evano G. Copper-Catalyzed Oxidative Alkynylation of Diaryl Imines with Terminal Alkynes: A Facile Synthesis of Ynimines. Org Lett 2011; 14:6-9. [DOI: 10.1021/ol2032152] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anouar Laouiti
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France, and Laboratoire de Chimie Organique Hétérocyclique, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, avenue de l’environnement, 5019 Monastir, Tunisia
| | - Mohamed M. Rammah
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France, and Laboratoire de Chimie Organique Hétérocyclique, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, avenue de l’environnement, 5019 Monastir, Tunisia
| | - Mohamed B. Rammah
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France, and Laboratoire de Chimie Organique Hétérocyclique, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, avenue de l’environnement, 5019 Monastir, Tunisia
| | - Jérome Marrot
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France, and Laboratoire de Chimie Organique Hétérocyclique, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, avenue de l’environnement, 5019 Monastir, Tunisia
| | - François Couty
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France, and Laboratoire de Chimie Organique Hétérocyclique, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, avenue de l’environnement, 5019 Monastir, Tunisia
| | - Gwilherm Evano
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles Saint-Quentin en Yvelines, 45, avenue des Etats-Unis, 78035 Versailles Cedex, France, and Laboratoire de Chimie Organique Hétérocyclique, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, avenue de l’environnement, 5019 Monastir, Tunisia
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19
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DeKorver KA, Walton MC, North TD, Hsung RP. Introducing a new class of N-phosphoryl ynamides via Cu(I)-catalyzed amidations of alkynyl bromides. Org Lett 2011; 13:4862-5. [PMID: 21848304 PMCID: PMC3170467 DOI: 10.1021/ol201947b] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We describe here the first synthesis of N-phosphoryl ynamides featuring C- and P-chirality via copper(I)-catalyzed amidative cross-couplings between phosphoramidates and phosphordiamidates with alkynyl bromides. Also featured is a tandem aza-Claisen-hetero-[2+2] cycloaddition for the synthesis of N-phosphoryl azetidin-2-imines.
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Affiliation(s)
- Kyle A. DeKorver
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Mary C. Walton
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Troy D. North
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
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20
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DeKorver KA, Johnson WL, Zhang Y, Hsung RP, Dai H, Deng J, Lohse AG, Zhang YS. N-allyl-N-sulfonyl ynamides as synthetic precursors to amidines and vinylogous amidines. An unexpected N-to-C 1,3-sulfonyl shift in nitrile synthesis. J Org Chem 2011; 76:5092-103. [PMID: 21563776 PMCID: PMC3120114 DOI: 10.1021/jo200780x] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A detailed study of amidine synthesis from N-allyl-N-sulfonyl ynamides is described here. Mechanistically, this is a fascinating reaction consisting of diverging pathways that could lead to deallylation or allyl transfer depending upon the oxidation state of palladium catalysts, the nucleophilicity of amines, and the nature of the ligands. It essentially constitutes a Pd(0)-catalyzed aza-Claisen rearrangement of N-allyl ynamides, which can also be accomplished thermally. An observation of N-to-C 1,3-sulfonyl shift was made when examining these aza-Claisen rearrangements thermally. This represents a useful approach to nitrile synthesis. While attempts to render this 1,3-sulfonyl shift stereoselective failed, we uncovered another set of tandem sigmatropic rearrangements, leading to vinyl imidate formation. Collectively, this work showcases the rich array of chemistry one can discover using these ynamides.
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Affiliation(s)
- Kyle A. DeKorver
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Whitney L. Johnson
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Yu Zhang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Huifang Dai
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Jun Deng
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Andrew G. Lohse
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
| | - Yan-Shi Zhang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, WI 53705
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