1
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Sun R, Viaud E, Nomula R, Naubron JV, Daugey N, Buffeteau T, Castet F, Toullec PY, Quideau S, Peixoto PA. Asymmetric Allenylation of Alkynes mediated by Chiral Organoselenated Reagents under Oxidative Conditions. Angew Chem Int Ed Engl 2023; 62:e202310436. [PMID: 37599267 DOI: 10.1002/anie.202310436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/12/2023] [Accepted: 08/16/2023] [Indexed: 08/22/2023]
Abstract
The reactivity of novel chiral lactamide-substituted diselenide-based reagents under oxidative conditions was exploited to develop a metal-free method for the preparation of enantioenriched allenylamides from simple alkynes in good yields, and with enantiomeric excesses up to 99 %. The key of the success in this method is attributed to the hydrogen-bonded lactamide appendages that ensure configurational stability of chiral vinyl selenoxide intermediates for an optimal enantiotopic β-syn-elimination step.
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Affiliation(s)
- Rongyu Sun
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | - Emilie Viaud
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | - Rajesh Nomula
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | | | - Nicolas Daugey
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | - Thierry Buffeteau
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | - Frédéric Castet
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | - Patrick Y Toullec
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
| | - Stéphane Quideau
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
- Institut Universitaire de France, 1 rue Descartes., 75231, Paris Cedex 05, France
| | - Philippe A Peixoto
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération., 33405, Talence Cedex, France
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2
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Pagès L, Bouquin M, Jaroschik F, Monnier F, Taillefer M. Copper-Catalyzed Regio- and Stereoselective Hydrothiolation of Allenamides, Enamides, and Ynamides. J Org Chem 2023; 88:1168-1176. [PMID: 36599034 DOI: 10.1021/acs.joc.2c02716] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We report a simple protocol for the copper-catalyzed hydrothiolation of N-unsaturated precursors, i.e., allenamides, enamides, and ynamides, under mild conditions. This method proceeds with a low loading of a commercially available Cu(CH3CN)4PF6 catalyst and enables the room-temperature transformation of a wide range of aromatic and aliphatic thiols into allylic or vinylic thioethers, 1,3-dithioethers, and thioaminals with good regio- and stereoselectivity.
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Affiliation(s)
- Lucas Pagès
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Maxime Bouquin
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | | | - Florian Monnier
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Marc Taillefer
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
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3
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Kumar NR, Agrawal AR, Choudhury A, Zade SS. The Effect of Base and Nucleophile on the Nucleophilic Substitution of Methoxytropone Derivatives: An Easy Access to 4- and 5-Substituted Multifunctional Azulenes. J Org Chem 2020; 85:9029-9041. [PMID: 32486646 DOI: 10.1021/acs.joc.0c00951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The nucleophilic substitution on 3-substituted 2-methoxytropones to form azulenes is dependent on the nucleophile and base employed. With bulkier nucleophiles (ethyl/methyl cyanoacetate), the reaction proceeds with the abnormal nucleophilic substitution irrespective of the base and with smaller nucleophiles (malononitrile), the reaction follows base-dependent normal and abnormal nucleophilic substitution. Thus, the methodologies are developed to selectively obtain 4- and 5-substituted azulenes based on the nature of bases and nucleophiles employed.
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Affiliation(s)
- Neha R Kumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, Nadia, West Bengal, India
| | - Abhijeet R Agrawal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, Nadia, West Bengal, India
| | - Aditya Choudhury
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, Nadia, West Bengal, India
| | - Sanjio S Zade
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, Nadia, West Bengal, India
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4
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Hirokane T, Watanabe S, Matsumoto K, Yoshida M. A facile synthesis of trisubstituted allenamides by DBU-promoted isomerization of propargylamides. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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5
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Fu L, Greßies S, Chen P, Liu G. Recent Advances and Perspectives in Transition Metal‐Catalyzed 1,4‐Functionalizations of Unactivated 1,3‐Enynes for the Synthesis of Allenes. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900277] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Liang Fu
- State Key Laboratory of Organometallic Chemistry, and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular SynthesisShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Steffen Greßies
- State Key Laboratory of Organometallic Chemistry, and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular SynthesisShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Pinhong Chen
- State Key Laboratory of Organometallic Chemistry, and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular SynthesisShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry, and Shanghai Hongkong Joint Laboratory in Chemical Synthesis, Center for Excellence in Molecular SynthesisShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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6
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Kondoh A, Ozawa R, Terada M. Synthesis of Trisubstituted Allenamides Utilizing 1,2-Rearrangement of Dialkoxyphosphoryl Moiety under Brønsted Base Catalysis. CHEM LETT 2019. [DOI: 10.1246/cl.190489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Ryosuke Ozawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
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7
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Spielmann K, Xiang M, Schwartz LA, Krische MJ. Direct Conversion of Primary Alcohols to 1,2-Amino Alcohols: Enantioselective Iridium-Catalyzed Carbonyl Reductive Coupling of Phthalimido-Allene via Hydrogen Auto-Transfer. J Am Chem Soc 2019; 141:14136-14141. [PMID: 31465211 DOI: 10.1021/jacs.9b08715] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first catalytic enantioselective carbonyl (α-amino)allylations are described. Phthalimido-allene 1 and primary alcohols 2a-2z, 2a'-2c' engage in hydrogen auto-transfer-mediated carbonyl reductive coupling by way of (α-amino)allyliridium-aldehyde pairs to form vicinal amino alcohols 3a-3z, 3a'-3c' with high levels of regio-, anti-diastereo-, and enantioselectivity. Reaction progress kinetic analysis and isotopic labeling studies corroborate a catalytic cycle involving turnover-limiting alcohol dehydrogenation followed by rapid allene hydrometalation.
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Affiliation(s)
- Kim Spielmann
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Ming Xiang
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Leyah A Schwartz
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Michael J Krische
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
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8
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Samanta S, Hajra A. Divergent Synthesis of Allenylsulfonamide and Enaminonesulfonamide via In(III)-Catalyzed Couplings of Propargylamine and N-Fluorobenzenesulfonimide. J Org Chem 2018; 83:13157-13165. [PMID: 30346168 DOI: 10.1021/acs.joc.8b01882] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An In(III)-catalyzed facile and controllable method for the synthesis of allenylsulfonamide and enaminonesulfonamide has been achieved by the reaction between propargylamine and N-fluorobenzenesulfonimide (NFSI) under mild conditions. The present protocol is also applicable to the synthesis of tetrasubstituted allenylsulfonamide from triphenyl propargylalcohol. Experimental results suggest that the reaction probably proceeds through the ionic pathway.
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Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry , Visva-Bharati (A Central University) , Santiniketan 731235 , India
| | - Alakananda Hajra
- Department of Chemistry , Visva-Bharati (A Central University) , Santiniketan 731235 , India
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9
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Vitkovskaya NM, Kobychev VB, Bobkov AS, Orel VB, Schmidt EY, Trofimov BA. Nucleophilic Addition of Ketones To Acetylenes and Allenes: A Quantum-Chemical Insight. J Org Chem 2017; 82:12467-12476. [PMID: 29058894 DOI: 10.1021/acs.joc.7b02263] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A CBS-Q//B3 based study has been carried out to elucidate the mechanism of the KOH/DMSO superbase catalyzed ketones nucleophilic addition to alkyl propargyl and alkyl allenyl ethers yielding, along with (Z)-monoadducts, up to 26% of unexpected (E)-diadducts. The impact of different substrates (alkynes versus allenes) on the reaction mechanism has been discussed in detail. Along with the model reaction of acetone addition to propyne and allene, the addition of acetone and acetophenone to methyl propargyl and methyl allenyl ethers is considered. The limiting reaction stage of the starting ketone carbanion addition to propargyl and allenyl systems occurs with activation energies typical for vinylation of ketones. In contrast, the addition of intermediate α-carbanions to the terminal position of methyl allenyl ether is associated with unusually low activation barriers. The results obtained explain the composition of the reaction products and indicate the participation of mainly the allene form in the reaction.
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Affiliation(s)
- Nadezhda M Vitkovskaya
- Laboratory of Quantum Chemistry, Irkutsk State University , 1 K. Marks St., 664003 Irkutsk, Russian Federation
| | - Vladimir B Kobychev
- Laboratory of Quantum Chemistry, Irkutsk State University , 1 K. Marks St., 664003 Irkutsk, Russian Federation
| | - Alexander S Bobkov
- Laboratory of Quantum Chemistry, Irkutsk State University , 1 K. Marks St., 664003 Irkutsk, Russian Federation
| | - Vladimir B Orel
- Laboratory of Quantum Chemistry, Irkutsk State University , 1 K. Marks St., 664003 Irkutsk, Russian Federation
| | - Elena Yu Schmidt
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences , 1 Favorsky St., 664033 Irkutsk, Russian Federation
| | - Boris A Trofimov
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences , 1 Favorsky St., 664033 Irkutsk, Russian Federation
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10
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Perego LA, Blieck R, Groué A, Monnier F, Taillefer M, Ciofini I, Grimaud L. Copper-Catalyzed Hydroamination of Allenes: from Mechanistic Understanding to Methodology Development. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00911] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Luca Alessandro Perego
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie Paris (IRCP), 75005 Paris, France
- 1 Ecole Normale
Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005 Paris, France
- 2 Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005 Paris, France
| | - Rémi Blieck
- Ecole Nationale Supérieure de Chimie De Montpellier, Institut Charles Gerhardt Montpellier UMR 5253 CNRS, AM2N, 8 rue de l’Ecole
Normale, Montpellier Cedex 5 34296, France
| | - Antoine Groué
- 1 Ecole Normale
Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005 Paris, France
- 2 Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005 Paris, France
| | - Florian Monnier
- Ecole Nationale Supérieure de Chimie De Montpellier, Institut Charles Gerhardt Montpellier UMR 5253 CNRS, AM2N, 8 rue de l’Ecole
Normale, Montpellier Cedex 5 34296, France
- Institut Universitaire de France, IUF, 1 rue Descartes, 75231 Paris Cedex 5, France
| | - Marc Taillefer
- Ecole Nationale Supérieure de Chimie De Montpellier, Institut Charles Gerhardt Montpellier UMR 5253 CNRS, AM2N, 8 rue de l’Ecole
Normale, Montpellier Cedex 5 34296, France
| | - Ilaria Ciofini
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie Paris (IRCP), 75005 Paris, France
| | - Laurence Grimaud
- 1 Ecole Normale
Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005 Paris, France
- 2 Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005 Paris, France
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11
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Jeanbourquin LN, Scopelliti R, Fadaei Tirani F, Severin K. Synthesis and Reactivity of 1-Allenyltriazenes. Org Lett 2017; 19:2070-2073. [DOI: 10.1021/acs.orglett.7b00671] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Loïc N. Jeanbourquin
- Institut des Sciences et
Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et
Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Farzaneh Fadaei Tirani
- Institut des Sciences et
Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Kay Severin
- Institut des Sciences et
Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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12
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Navarro-Vázquez A. Why base-catalyzed isomerization of N-propargyl amides yields mostly allenamides rather than ynamides. Beilstein J Org Chem 2015; 11:1441-6. [PMID: 26425200 PMCID: PMC4578395 DOI: 10.3762/bjoc.11.156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 07/30/2015] [Indexed: 11/30/2022] Open
Abstract
The base-catalyzed isomerization of N-propargylamides or carbamates may furnish N-allenyl compounds (allenamides/allencarbamates) or further evolve to N-alkynyl compounds (ynamides or yncarbamates). The particular fate of this reaction varies from experiment to experiment and there is no clear rule for predicting the reaction outcome for a particular structure. With the support of ab initio and DFT computations, this work shows that observed results can be explained by assuming an exchange equilibrium between energetically close N-propargyl, allenyl and N-alkynyl forms and that the reaction outcome correlates to a particular equilibrium mixture. Due to the very small energy gap between the N-allenyl and N-alkynyl forms, small structural changes may easily alter the equilibrium position, explaining the variety of observed experimental results. Based on CBS-QB3 computations, the ωB97 functional provided reasonably accurate isomerization energies and could successfully predict the experimentally observed behavior for several examples from the literature.
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Affiliation(s)
- Armando Navarro-Vázquez
- Departamento de Química Fundamental, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, Cidade Universitária - Recife, PE - CEP 50.740-560, Brazil
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13
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Li Y, Chen J, Qiu R, Wang X, Long J, Zhu L, Au CT, Xu X. Cesium hydroxide-catalyzed isomerization of terminal alkynes for the synthesis of O-allenes and N-allenes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.08.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Highly Regioselective Radical Amination of Allenes: Direct Synthesis of Allenamides and Tetrasubstituted Alkenes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506066] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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15
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Zhang G, Xiong T, Wang Z, Xu G, Wang X, Zhang Q. Highly Regioselective Radical Amination of Allenes: Direct Synthesis of Allenamides and Tetrasubstituted Alkenes. Angew Chem Int Ed Engl 2015; 54:12649-53. [DOI: 10.1002/anie.201506066] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 08/03/2015] [Indexed: 12/15/2022]
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16
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Bousfield TW, Kimber MC. A simple one-pot preparation of N-allenyl amides, ureas, carbamates and sulfonamides using a DMSO/tBuOK protocol. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.093] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Lu T, Lu Z, Ma ZX, Zhang Y, Hsung RP. Allenamides: a powerful and versatile building block in organic synthesis. Chem Rev 2013; 113:4862-904. [PMID: 23550917 PMCID: PMC4539064 DOI: 10.1021/cr400015d] [Citation(s) in RCA: 272] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ting Lu
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Zhenjie Lu
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Zhi-Xiong Ma
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Yu Zhang
- Discovery Research, Dow AgroSciences LLC, Indianapolis, IN 46268
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
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18
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Abstract
This short review highlights some of the recent important developments on the synthesis of allenes and its applications on the synthesis of some allenic natural products and allenic-based optoelectronic materials.
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Affiliation(s)
- Shichao Yu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai 200032
- P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai 200032
- P. R. China
- Shanghai Key Laboratory of Green Chemistry and Process
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19
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Lu T, Hayashi R, Hsung RP, DeKrover KA, Lohse AG, Song Z, Tang Y. Synthesis of amido-spiro[2.2]pentanes via Simmons-Smith cyclopropanation of allenamides. Org Biomol Chem 2009; 7:3331-7. [PMID: 19641792 PMCID: PMC2829688 DOI: 10.1039/b908205k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed account of Simmons-Smith cyclopropanations of allenamides en route to amido-spiro[2.2]pentanes is described here. While the diastereoselectivity was low when using unsubstituted allenamides, the reaction is overall efficient and general, representing the most direct synthesis of both chemically and biologically interesting amido-spiro[2.2]pentane systems. With alpha-substituted allenamides, while the diastereoselectivity could be improved significantly based on a series of conformational analyses, both mono- and bis-cyclopropanation products were observed. Consequently, several structurally intriguing amido-methylene cyclopropanes could also be prepared.
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Affiliation(s)
- Ting Lu
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
| | - Ryuji Hayashi
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
| | - Kyle A. DeKrover
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
| | - Andrew G. Lohse
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
| | - Zhenlei Song
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
| | - Yu Tang
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue University of Wisconsin, Madison, WI 53705-2222
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20
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Tang Y, Shen L, Dellaria BJ, Hsung RP. Saucy-Marbet Rearrangements of Alkynyl Halides in the Synthesis of Highly Enantiomerically Enriched Allenyl Halides. Tetrahedron Lett 2008; 49:6404-6409. [PMID: 19890378 PMCID: PMC2598747 DOI: 10.1016/j.tetlet.2008.08.089] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A stereospecific Saucy-Marbet rearrangement of alkynyl halides is described here. These rearrangements provide an entry to highly enantiomerically enriched allenyl bromides and chlorides through excellent chirality transfer and the reservation of optical integrity of alkynyl halides.
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Affiliation(s)
- Yu Tang
- Division of Pharmauetical Sciences and Department of Chemistry, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Lichun Shen
- Division of Pharmauetical Sciences and Department of Chemistry, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Becky J. Dellaria
- Division of Pharmauetical Sciences and Department of Chemistry, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
| | - Richard P. Hsung
- Division of Pharmauetical Sciences and Department of Chemistry, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705
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