1
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Dutta S, Lu YL, Erchinger JE, Shao H, Studer E, Schäfer F, Wang H, Rana D, Daniliuc CG, Houk KN, Glorius F. Double Strain-Release [2π+2σ]-Photocycloaddition. J Am Chem Soc 2024; 146:5232-5241. [PMID: 38350439 DOI: 10.1021/jacs.3c11563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
In pursuit of potent pharmaceutical candidates and to further improve their chemical traits, small ring systems can serve as a potential starting point. Small ring units have the additional merit of loaded strain at their core, making them suitable reactants as they can capitalize on this intrinsic driving force. With the introduction of cyclobutenone as a strained precursor to ketene, the photocycloaddition with another strained unit, bicyclo[1.1.0]butane (BCB), enables the reactivity of both π-units in the transient ketene. This double strain-release driven [2π+2σ]-photocycloaddition promotes the synthesis of diverse heterobicyclo[2.1.1]hexane units, a pharmaceutically relevant bioisostere. The effective reactivity under catalyst-free conditions with a high functional group tolerance defines its synthetic utility. Experimental mechanistic studies and density functional theory (DFT) calculations suggest that the [2π+2σ]-photocycloaddition takes place via a triplet mechanism.
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Affiliation(s)
- Subhabrata Dutta
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Yi-Lin Lu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Johannes E Erchinger
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Huiling Shao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Emanuel Studer
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Felix Schäfer
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Huamin Wang
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Debanjan Rana
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Frank Glorius
- Organisch-Chemisches Institut, Universität Münster, Corrensstraße 36, 48149 Münster, Germany
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2
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More SA, Sadaphal VA, Kuo TC, Cheng MJ, Liu RS. Reactions of thioalkynes with diarylketenes via [3+2]-annulation versus benzannulation using Au and P(C 6F 5) 3 catalysts. Chem Commun (Camb) 2022; 58:10064-10067. [PMID: 35993289 DOI: 10.1039/d2cc03613d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two catalytic annulations of non-symmetric diarylketenes with thioalkynes are described using gold and phosphine catalysts respectively. We employed α-aryldiazo ketones to generate gold-π-ketenes, ultimately yielding azulen-1-one derivatives. With the same reactants, we utilized P(C6F5)3 to increase the yields of 1-naphthols, notably with a complete regioselectivity.
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Affiliation(s)
- Sayaji Arjun More
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.
| | - Vikas Ashokrao Sadaphal
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.
| | - Tung-Chun Kuo
- Department of Chemistry, National Cheng Kung University, Tainan, Taiwan, Republic of China.
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, Tainan, Taiwan, Republic of China.
| | - Rai-Shung Liu
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.
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3
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Wang Y, Hu M, Ding L, Wang Y, Wang XN, Chang J. [2 + 2] Cycloaddition of Ynamides to Construct 3-Aminocyclobutenones. Org Lett 2022; 24:5056-5061. [PMID: 35816096 DOI: 10.1021/acs.orglett.2c01825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient Tf2NH-catalyzed [2 + 2] cycloaddition of ynamides under mild conditions has been developed. Within short reaction times, various ynamides are transformed into the corresponding 3-aminocyclobutenones in good to excellent yields. This is the first example for the metal-free intermolecular [2 + 2] self-cycloaddition of ynamides. Meanwhile, the desired cycloaddition products can be easily transformed into aminonaphthol derivatives.
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Affiliation(s)
- Yanru Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Mengjun Hu
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Lixia Ding
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Yanan Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Xiao-Na Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
| | - Junbiao Chang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China
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4
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Vinyl and Alkynyl Triazenes: Synthesis, Reactivity, and Applications. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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5
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Luo J, Chen GS, Chen SJ, Yu JS, Li ZD, Liu YL. Exploiting Remarkable Reactivities of Ynamides: Opportunities in Designing Catalytic Enantioselective Reactions. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04180] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jian Luo
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
| | - Guo-Shu Chen
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
| | - Shu-Jie Chen
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Zhao-Dong Li
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University Wushan Street five road No. 483, Guangzhou 510642, China
| | - Yun-Lin Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
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6
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Suleymanov AA, Severin K. Vinyl and Alkynyl Triazenes: Synthesis, Reactivity, and Applications. Angew Chem Int Ed Engl 2020; 60:6879-6889. [PMID: 33142011 DOI: 10.1002/anie.202011031] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Indexed: 12/15/2022]
Abstract
Aromatic compounds containing triazenyl groups (N3 RR') have a profound impact on synthetic organic and medicinal chemistry. In contrast, the chemistry of vinyl and alkynyl triazenes was a largely uncharted territory until recently. The situation has changed over the last five years, and it has become apparent that vinyl and alkynyl triazenes are highly interesting compounds with a unique reactivity. The electron-donating properties of the triazenyl group provide alkynyl triazenes with an ynamide-like reactivity, which can be exploited in reactions of the triple bond. Vinyl triazenes, on the other hand, can be used for electrophilic vinylation reactions. The foundation for this new triazene chemistry are synthetic pathways which allow preparing vinyl and alkynyl triazenes in few steps from readily available starting materials. In this Minireview, we summarize recent developments in this area.
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Affiliation(s)
- Abdusalom A Suleymanov
- 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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7
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Salehi P, Shiri M. Palladium‐Catalyzed Regioselective Synthesis of 3‐(Hetero)Arylpropynamides from
gem
‐Dibromoalkenes and Isocyanides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800963] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Parvin Salehi
- Department of ChemistryAlzahra University, Vanak Tehran 1993893973 Iran
| | - Morteza Shiri
- Department of ChemistryAlzahra University, Vanak Tehran 1993893973 Iran
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8
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Peng C, Zhang J, Xue J, Li S, Wang XN, Chang J. Lewis Acids Catalyzed Annulations of Ynamides with Acyl Chlorides for Constructing 4-Amino-2-naphthol Derivatives and 3-Aminocyclobutenones. J Org Chem 2018; 83:9256-9266. [PMID: 29978700 DOI: 10.1021/acs.joc.8b01255] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Two complementary synthetic manifestations leading to highly substituted 1-naphthol and 2-naphthol derivatives via Lewis acids catalyzed annulations of ynamides with acyl chlorides are described here. A one-pot synthesis of 4-amino-2-naphthol derivatives is accomplished via a ZnI2-catalyzed tandem Friedel-Crafts reaction sequence. While in the presence of Pd(0) catalyst, a [2 + 2] cycloaddition reaction of ynamides with monosubstituted ketenes that were generated from the dehydrohalogenation of suitable acyl chlorides leads to efficient formation of 3-aminocyclobutenones, which were subsequently modified to generate 3-amino-1-naphthols in excellent yields.
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Affiliation(s)
- Cheng Peng
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
| | - Jingyi Zhang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
| | - Jian Xue
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
| | - Siqi Li
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
| | - Xiao-Na Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
| | - Junbiao Chang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, and College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
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9
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Sau MC, Rajesh Y, Mandal M, Bhattacharjee M. Copper Catalyzed Regioselective N – Alkynylation of Pyrazoles and Evaluation of the Anticancer Activity of Ethynyl‐ Pyrazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201800177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohan Chandra Sau
- Department of ChemistryIndian Institute of Technology Kharagpur 721302 India
| | - Y. Rajesh
- School of Medical Science and TechnologyIndian Institute of Technology Kharagpur 721302 India
| | - Mahitosh Mandal
- School of Medical Science and TechnologyIndian Institute of Technology Kharagpur 721302 India
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Misale A, Niyomchon S, Maulide N. Cyclobutenes: At a Crossroad between Diastereoselective Syntheses of Dienes and Unique Palladium-Catalyzed Asymmetric Allylic Substitutions. Acc Chem Res 2016; 49:2444-2458. [PMID: 27797480 DOI: 10.1021/acs.accounts.6b00375] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The rich chemistry of cyclobutanes is underpinned by a large body of synthetic literature devoted to their synthesis and decoration. This is motivated by the widespread representation of cyclobutane moieties in biologically active natural products and man-made molecules. Surprisingly, this vast array of knowledge finds no parallel in the chemistry of cyclobutenes, their unsaturated analogues. In particular, a dearth of methods to synthesize enantioenriched cyclobutenes is apparent upon cursory investigation of the literature. As a leading example, the photocycloaddition of maleic anhydride to acetylene or dichloroethylene, probably a benchmark of cyclobutene synthesis, delivers a meso cyclic anhydride which can be further converted to a cyclobutene product by enantioselective desymmetrization by ring opening. Nonetheless, such an approach delivers products with a rather inflexible substitution pattern around the four-membered ring. The lack of general approaches has motivated our group and others to develop novel routes to cyclobutene scaffolds, leading to the development of a strategy that combines photochemistry and catalysis. Indeed, we have coupled the simple and efficient photochemical isomerization of 2-pyrone into a strained bicyclo[2.2.0] lactone with palladium-catalyzed allylic alkylation as a simple and versatile access to functionalized cyclobutenes. Several nucleophiles can be added to the activated, strained intermediate, including malonate anions and azlactones. The products are mono- and bicyclic building blocks richly decorated with functional groups. Importantly, they are formed with high levels of diastereoselectivity as expected by the tenets of palladium-catalyzed allylic alkylation, which posit that the oxidative addition and nucleophilic capture steps proceed with inversion of configuration, resulting in overall retention (inversion + inversion). However, the transposition of the methodology to an asymmetric version subsequently led to the surprising discovery of a family of highly enantioselective, diastereodivergent catalytic processes. Indeed, we observed a ligand-dependent stereochemical outcome for a range of palladium-catalyzed allylic alkylations affording either overall retention or overall inversion of configuration, and that with very high levels of enantio- and diastereoselectivity. The new family of diastereodivergent reactions enables the conversion of the aforementioned racemic bicyclo[2.2.0] lactone into each of 4 stereoisomeric products, at will. Although the mechanistic details at the origin of this unusual stereodivergence are not yet fully elucidated, it became clear through our studies that unique Pd-allyl complexes, residing preferentially as their σ-(monohapto)-bound isomers, are at the heart of the process. The cyclobutenes prepared can also engage in electrocyclic ring-opening reactions (often spontaneous depending on the substitution pattern) that link this chemistry with that of diene and polyene frameworks. Using the strategies laid out above, our group was then able to harness the high stereospecificity of electrocyclic reactions and design modular syntheses of several natural products and natural product fragments. We believe that the methods presented herein shall soon pave the way for the streamlined synthesis of more complex polyenic natural products.
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Affiliation(s)
- Antonio Misale
- University of Vienna, Institute of Organic Chemistry, Währinger Straße 38, 1090 Vienna, Austria
| | - Supaporn Niyomchon
- University of Vienna, Institute of Organic Chemistry, Währinger Straße 38, 1090 Vienna, Austria
| | - Nuno Maulide
- University of Vienna, Institute of Organic Chemistry, Währinger Straße 38, 1090 Vienna, Austria
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11
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A Concise Total Synthesis of Dictyodendrins F, H, and I Using Aryl Ynol Ethers as Key Building Blocks. J Am Chem Soc 2016; 138:10684-92. [PMID: 27471872 DOI: 10.1021/jacs.6b06460] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a concise total synthesis of dictyodendrin F and the first total syntheses of dictyodendrins H and I in six steps. In these syntheses, aryl ynol ethers were employed as the key building blocks to introduce aryl and heteroaryl rings in the dictyodendrins. This rapid synthesis utilized a novel hetero-[2 + 2]-cycloaddition reaction between two aryl ynol ethers to yield a cyclobutenone ring. The cyclobutenone was sequentially converted into a highly substituted carbazole via a retro-4π/6π-electrocyclization-N-acylation cascade reaction to provide the dictyodendrin core. Consecutive intramolecular oxidative coupling and deprotection gave dictyodendrins F, H, and I.
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12
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Chen L, Cao J, Xu Z, Zheng ZJ, Cui YM, Xu LW. Lewis acid catalyzed [2+2] cycloaddition of ynamides and propargyl silyl ethers: synthesis of alkylidenecyclobutenones and their reactivity in ring-opening and ring expansion. Chem Commun (Camb) 2016; 52:9574-7. [DOI: 10.1039/c6cc04648g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A family of four-membered enones, polysubstituted alkylidenecyclobutenones, were easily prepared by the Lewis acid catalyzed formal [2+2] cycloaddition of ynamides and propargyl silyl ethers.
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Affiliation(s)
- Ling Chen
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Zhan-Jiang Zheng
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education
- Hangzhou Normal University
- Hangzhou 311121
- P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics (LICP)
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13
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Perrin FG, Kiefer G, Jeanbourquin L, Racine S, Perrotta D, Waser J, Scopelliti R, Severin K. 1‐Alkynyltriazenes as Functional Analogues of Ynamides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Florian G. Perrin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Gregor Kiefer
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Loïc Jeanbourquin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Sophie Racine
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Daniele Perrotta
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Jérôme Waser
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
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Perrin FG, Kiefer G, Jeanbourquin L, Racine S, Perrotta D, Waser J, Scopelliti R, Severin K. 1-Alkynyltriazenes as Functional Analogues of Ynamides. Angew Chem Int Ed Engl 2015; 54:13393-6. [PMID: 26374083 DOI: 10.1002/anie.201507033] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Indexed: 01/25/2023]
Abstract
The chemical reactivity of 1-alkynyltriazenes has been investigated and is found to parallel the reactivity of ynamides. The similarity in reactivity of these two classes of compounds is demonstrated by addition reactions with acids, by cycloaddition reactions with ketenes, tetracyanoethene, and cyclopropanes, as well as by intramolecular cyclization reactions. The presence of reactive triazene groups in the products enables subsequent transformations. Overall, our results suggest that 1-alkynyltriazenes should become valuable reagents in synthetic organic chemistry.
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Affiliation(s)
- Florian G Perrin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Gregor Kiefer
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Loïc Jeanbourquin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Sophie Racine
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Daniele Perrotta
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Jérôme Waser
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland)
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, (Switzerland).
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15
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Synthesis of multisubstituted cyclobutenones via copper-catalyzed intramolecular C-vinylation of ketones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Zhou X, Zafar I, Dong G. Catalytic intramolecular decarbonylative coupling of 3-aminocyclobutenones and alkenes: a unique approach to [3.1.0] bicycles. Tetrahedron 2015; 71:4478-4483. [PMID: 26034330 DOI: 10.1016/j.tet.2015.02.087] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Here we describe a rhodium-catalyzed intramolecular decarbonylative coupling between 3-aminocyclobutenones and alkenes for synthesis of substituted [3.1.0] bicycles. This transformation represents a formal cyclopropanation reaction, in which the cyclobutenones serve as a one-carbon-unit synthon.
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Affiliation(s)
- Xuan Zhou
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, United States
| | - Imran Zafar
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, United States
| | - Guangbin Dong
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, United States
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18
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S3S63 Terminal Ynamides: Synthesis, Coupling Reactions and Additions to Common Electrophiles. Tetrahedron Lett 2015; 56:2377-2392. [PMID: 26085692 DOI: 10.1016/j.tetlet.2015.03.111] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Ynamides consist of a polarized triple bond that is directly attached to a nitrogen atom carrying a sulfonyl, an alkoxycarbonyl, an acyl or another electron withdrawing group. The triple bond polarization renders ynamides broadly useful building blocks with synthetic opportunities that go far beyond traditional alkyne chemistry. The versatile reactivity of ynamides in cycloadditions, cycloisomerizations, regioselective additions with various nucleophiles or electrophiles, ring-closing metathesis, and many other reactions has been investigated in detail during the past decades. A common feature of these methods is that the triple bond is consumed and either cleaved or transformed to a new functionality. The wealth of reports on these ynamide reactions is in stark contrast to the dearth of carbon-carbon bond formations that leave the triple bond of terminal ynamides intact. The recent introduction of effective synthetic methods for the preparation of terminal ynamides has set the stage to fully explore the synthetic potential of this intriguing class of compounds. This digest letter summarizes the most effective routes to terminal ynamides and the current state of selective nucleophilic addition, substitution and coupling reactions, including the first examples of asymmetric synthesis.
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Alcaide B, Almendros P, Fernández I, Lázaro-Milla C. Unveiling the uncatalyzed reaction of alkynes with 1,2-dipoles for the room temperature synthesis of cyclobutenes. Chem Commun (Camb) 2015; 51:3395-8. [PMID: 25622085 DOI: 10.1039/c4cc10111a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
2-(Pyridinium-1-yl)-1,1-bis(triflyl)ethanides have been used as 1,2-dipole precursors in a metal-free direct [2+2] cycloaddition reaction of alkynes. Starting from stable zwitterionic pyridinium salts, the electron deficient olefin 1,1-bis(trifluoromethylsulfonyl)ethene is generated in situ and immediately reacted at room temperature with an alkyne to afford substituted cyclobutenes. Remarkably, this mild and facile uncatalyzed protocol requires neither irradiation nor heating.
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Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040-Madrid, Spain.
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Yuan Y, Bai L, Nan J, Liu J, Luan X. Regiospecific Ficini [2 + 2] cycloaddition of ynamides with cyclic isoimidium salts under catalyst-free conditions. Org Lett 2014; 16:4316-9. [PMID: 25102092 DOI: 10.1021/ol5020587] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The regiospecific [2 + 2] cycloaddition of cyclic isoimidium salts with ynamides is described. This effort led to the development of the first successful example of a catalyst-free, thermally driven Ficini [2 + 2] cycloaddition process of ynamides with α,β-unsaturated carbonyl compounds, giving the stable cyclobutenamides in excellent yields (up to 99%).
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Affiliation(s)
- Yini Yuan
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University , Xi'an 710069, China
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Betou M, Kerisit N, Meledje E, Leroux YR, Katan C, Halet JF, Guillemin JC, Trolez Y. High-Yield Formation of Substituted Tetracyanobutadienes from Reaction of Ynamides with Tetracyanoethylene. Chemistry 2014; 20:9553-7. [DOI: 10.1002/chem.201402653] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Indexed: 11/08/2022]
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Priebbenow DL, Becker P, Bolm C. Copper-Catalyzed Oxidative Decarboxylative Couplings of Sulfoximines and Aryl Propiolic Acids. Org Lett 2013; 15:6155-7. [DOI: 10.1021/ol403106e] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Daniel L. Priebbenow
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Peter Becker
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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Willumstad TP, Haze O, Mak XY, Lam TY, Wang YP, Danheiser RL. Batch and flow photochemical benzannulations based on the reaction of ynamides and diazo ketones. Application to the synthesis of polycyclic aromatic and heteroaromatic compounds. J Org Chem 2013; 78:11450-69. [PMID: 24116731 DOI: 10.1021/jo402010b] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Highly substituted polycyclic aromatic and heteroaromatic compounds are produced via a two-stage tandem benzannulation/cyclization strategy. The initial benzannulation step proceeds via a pericyclic cascade mechanism triggered by thermal or photochemical Wolff rearrangement of a diazo ketone. The photochemical process can be performed using a continuous flow reactor which facilitates carrying out reactions on a large scale and minimizes the time required for photolysis. Carbomethoxy ynamides as well as more ketenophilic bis-silyl ynamines and N-sulfonyl and N-phosphoryl ynamides serve as the reaction partner in the benzannulation step. In the second stage of the strategy, RCM generates benzofused nitrogen heterocycles, and various heterocyclization processes furnish highly substituted and polycyclic indoles of types that were not available by using the previous cyclobutenone-based version of the tandem strategy.
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Affiliation(s)
- Thomas P Willumstad
- Department of Chemistry Massachusetts Institute of Technology Cambridge, Massachusetts 02139
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Pirwerdjan R, Priebbenow DL, Becker P, Lamers P, Bolm C. Exploring the Reactivity ofN-Alkynylated Sulfoximines: [2 + 2]-Cycloadditions. Org Lett 2013; 15:5397-9. [DOI: 10.1021/ol4026028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ramona Pirwerdjan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Daniel L. Priebbenow
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Peter Becker
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Philip Lamers
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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Smith DL, Chidipudi SR, Goundry WR, Lam HW. Rhodium-catalyzed [2 + 2] cycloaddition of ynamides with nitroalkenes. Org Lett 2012; 14:4934-7. [PMID: 22954424 DOI: 10.1021/ol302259v] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In the presence of a diene-ligated rhodium complex, ynamides and nitroalkenes undergo catalytic [2 + 2] cycloadditions to provide cyclobutenamides. The presence of sodium tetraphenylborate was found to be crucial for the reactions to proceed efficiently.
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Affiliation(s)
- Donna L Smith
- EaStCHEM, School of Chemistry, University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh, EH9 3JJ, United Kingdom
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Souto JA, Becker P, Iglesias Á, Muñiz K. Metal-Free Iodine(III)-Promoted Direct Intermolecular C–H Amination Reactions of Acetylenes. J Am Chem Soc 2012; 134:15505-11. [DOI: 10.1021/ja306211q] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | | | | | - Kilian Muñiz
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs
Companys, 23, 08010 Barcelona, Spain
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Lu Z, Xu X, Yang Z, Kong L, Zhu G. Approach to highly functionalized oxazolones by a Pd-catalyzed cyclization of N-alkynyl tert-butyloxycarbamates. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.074] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lu Z, Yang Z, Cui W, Zhu G. A Facile Access to 3,5-Disubstituted Oxazolones Featuring a Cu-catalyzed Cyclization of N-Alkynyl tert-Butyl Carbamates. CHEM LETT 2012. [DOI: 10.1246/cl.2012.636] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zenghui Lu
- Department of Chemistry, Zhejiang Normal University
| | | | - Weijian Cui
- Department of Chemistry, Zhejiang Normal University
| | - Gangguo Zhu
- Department of Chemistry, Zhejiang Normal University
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University
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Nakaya R, Yasuda S, Yorimitsu H, Oshima K. (1-Alkynyl)dicarbonylcyclopentadienyliron Complexes as Electron-Rich Alkynes in Organic Synthesis: BF3-Mediated [2+2] Cycloaddition/Ring-Opening Providing (2-Alkenyl-1-imino)iron Complexes. Chemistry 2011; 17:8559-61. [DOI: 10.1002/chem.201100669] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Indexed: 11/11/2022]
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Wang YP, Danheiser RL. Synthesis of 2-iodoynamides and regioselective [2+2] cycloadditions with ketene. Tetrahedron Lett 2011; 52:2111-2114. [PMID: 21479121 DOI: 10.1016/j.tetlet.2010.11.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The first synthesis of 2-iodoynamides is described as well as the first [2+2] cycloadditions of ketene with iodo alkynes.
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Affiliation(s)
- Yu-Pu Wang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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31
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Chai G, Wu S, Fu C, Ma S. A straightforward synthesis of cyclobutenones via a tandem Michael addition/cyclization reaction of 2,3-allenoates with organozincs. J Am Chem Soc 2011; 133:3740-3. [PMID: 21351788 DOI: 10.1021/ja1108694] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient method for synthesis of polysubstituted cyclobutenones, which are not readily available from traditional methods due to the intrinsic ring strain, is described. The reaction of 2,3-allenoates and organozinc reagents proceeds via a tandem Michael addition/cyclic 1,2-addition/elimination mechanism with the functional groups from the organozinc reagents being introduced to the 3-position of the cyclobutenone products regiospecifically in moderate to excellent yields. Application to the synthesis of stereodefined β,γ-unsaturated enones is demonstrated.
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Affiliation(s)
- Guobi Chai
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, Zhejiang, PR China
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Mak XY, Crombie AL, Danheiser RL. Synthesis of polycyclic benzofused nitrogen heterocycles via a tandem ynamide benzannulation/ring-closing metathesis strategy. Application in a formal total synthesis of (+)-FR900482. J Org Chem 2011; 76:1852-73. [PMID: 21322545 DOI: 10.1021/jo2000308] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A two-stage "tandem strategy" for the synthesis of benzofused nitrogen heterocycles is described that is particularly useful for the construction of systems with a high level of substitution on the benzenoid ring. The first stage in the strategy involves a benzannulation based on the reaction of cyclobutenones with ynamides. This cascade process proceeds via a sequence of four pericyclic reactions and furnishes a multiply substituted aniline derivative which can bear a variety of functionalized substituents at the position ortho to the nitrogen. In the second stage of the tandem strategy, ring-closing metathesis generates the nitrogen heterocyclic ring. This two-step sequence provides efficient access to highly substituted dihydroquinolines, benzazepines, benzazocines, and related benzofused nitrogen heterocyclic systems. The application of this chemistry in a concise formal total synthesis of the anticancer agents (+)-FR900482 and (+)-FR66979 is described.
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Affiliation(s)
- Xiao Yin Mak
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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DeKorver KA, Li H, Lohse AG, Hayashi R, Lu Z, Zhang Y, Hsung RP. Ynamides: a modern functional group for the new millennium. Chem Rev 2010; 110:5064-106. [PMID: 20429503 DOI: 10.1021/cr100003s] [Citation(s) in RCA: 722] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Kyle A DeKorver
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, USA
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Li H, Hsung RP, DeKorver KA, Wei Y. Copper-catalyzed Ficini [2 + 2] cycloaddition of ynamides. Org Lett 2010; 12:3780-3. [PMID: 20690601 DOI: 10.1021/ol101418d] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Ficini [2 + 2] cycloaddition using N-sulfonyl-substituted ynamides is described, featuring the utility of CuCl(2) and AgSbF(6) as catalysts. This work represents the first successful example of ynamides participating in a thermal [2 + 2] cycloaddition with enones.
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Affiliation(s)
- Hongyan Li
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, USA
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Dooleweerdt K, Birkedal H, Ruhland T, Skrydstrup T. Irregularities in the effect of potassium phosphate in ynamide synthesis. J Org Chem 2010; 73:9447-50. [PMID: 18991381 DOI: 10.1021/jo801935b] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The yields of ynamides using Hsung's second generation protocol depend substantially on the quality of K(3)PO(4). Samples of K(3)PO(4) from different suppliers were investigated by various techniques, revealing that the use of pure and anhydrous K(3)PO(4) provides higher ynamide yields in comparison to samples contaminated with hydrates (K(3)PO(4) x 1.5 H(2)O and K(3)PO(4) x 7 H(2)O). With high quality K(3)PO(4), a number of ynamides were synthesized in yields of 52-91%. In addition, we report that ynamides can undergo regioselective hydroamination with carbamates.
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Affiliation(s)
- Karin Dooleweerdt
- Department of Chemistry and the Interdisciplinary Nanoscience Center, University of Aarhus, Langelandsgade 140, 8000 Aarhus C, Denmark
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Evano G, Coste A, Jouvin K. Ynamides: Versatile Tools in Organic Synthesis. Angew Chem Int Ed Engl 2010; 49:2840-59. [DOI: 10.1002/anie.200905817] [Citation(s) in RCA: 672] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Evano G, Coste A, Jouvin K. Inamide: vielseitige Bausteine für die organische Synthese. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905817] [Citation(s) in RCA: 213] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zhao YL, Yang SC, Di CH, Han XD, Liu Q. Highly efficient synthesis of 3-amino-/alkylthio-cyclobut-2-en-1-ones based on the cyclization of acyl ketene dithioacetals. Chem Commun (Camb) 2010; 46:7614-6. [DOI: 10.1039/c0cc02470h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Kramer S, Dooleweerdt K, Lindhardt AT, Rottländer M, Skrydstrup T. Highly Regioselective Au(I)-Catalyzed Hydroamination of Ynamides and Propiolic Acid Derivatives with Anilines. Org Lett 2009; 11:4208-11. [DOI: 10.1021/ol901565p] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Søren Kramer
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and Division of Medicinal Chemistry, H. Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
| | - Karin Dooleweerdt
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and Division of Medicinal Chemistry, H. Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
| | - Anders Thyboe Lindhardt
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and Division of Medicinal Chemistry, H. Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
| | - Mario Rottländer
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and Division of Medicinal Chemistry, H. Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
| | - Troels Skrydstrup
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and Division of Medicinal Chemistry, H. Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
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Coste A, Karthikeyan G, Couty F, Evano G. Copper-Mediated Coupling of 1,1-Dibromo-1-alkenes with Nitrogen Nucleophiles: A General Method for the Synthesis of Ynamides. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200901099] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Coste A, Karthikeyan G, Couty F, Evano G. Copper-Mediated Coupling of 1,1-Dibromo-1-alkenes with Nitrogen Nucleophiles: A General Method for the Synthesis of Ynamides. Angew Chem Int Ed Engl 2009; 48:4381-5. [DOI: 10.1002/anie.200901099] [Citation(s) in RCA: 182] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Buzas A, Istrate F, Le Goff XF, Odabachian Y, Gagosz F. Gold(I)-catalyzed [4+2] cycloaddition of N-(hex-5-enynyl) tert-butyloxycarbamates. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.11.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Dooleweerdt K, Ruhland T, Skrydstrup T. Application of Ynamides in the Synthesis of 2-Amidoindoles. Org Lett 2008; 11:221-4. [DOI: 10.1021/ol802477d] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karin Dooleweerdt
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and H. Lundbeck A/S, Ottiliavej 9, 2400 Valby, Denmark
| | - Thomas Ruhland
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and H. Lundbeck A/S, Ottiliavej 9, 2400 Valby, Denmark
| | - Troels Skrydstrup
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark, and H. Lundbeck A/S, Ottiliavej 9, 2400 Valby, Denmark
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Li J, Han Y, Freedman TB, Zhu S, Kerwood DJ, Luk YY. Utilizing the high dielectric constant of water: efficient synthesis of amino acid-derivatized cyclobutenones. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.01.121] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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Kohnen AL, Dunetz JR, Danheiser RL. SYNTHESIS OF YNAMIDES BY N-ALKYNYLATION OF AMINE DERIVATIVES. PREPARATION OF N-ALLYL-N-(METHOXYCARBONYL)-1,3-DECADIYNYLAMINE. ORGANIC SYNTHESES; AN ANNUAL PUBLICATION OF SATISFACTORY METHODS FOR THE PREPARATION OF ORGANIC CHEMICALS 2007; 84:88-101. [PMID: 20657723 PMCID: PMC2909114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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