751
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Tietze LF, Waldecker B, Ganapathy D, Eichhorst C, Lenzer T, Oum K, Reichmann SO, Stalke D. Vier- und sechsfache Tandem-Dominoreaktionen zur Synthese von dimeren tetrasubstituierten Alkenen als molekulare Doppelschalter. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503538] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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752
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Cao D, Zhang J, Wang H, Zhao G. Dipeptide-Derived Multifunctional Quaternary Phosphonium Salt Catalyzed Asymmetric Cyclizations via a Tandem Michael Addition/SN2 Sequence. Chemistry 2015; 21:9998-10002. [DOI: 10.1002/chem.201501806] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 12/17/2022]
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753
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Jindal G, Sunoj RB. Deciphering the Origin of Stereoinduction in Cooperative Asymmetric Catalysis Involving Pd(II) and a Chiral Brønsted Acid. Org Lett 2015; 17:2874-7. [PMID: 26057464 DOI: 10.1021/acs.orglett.5b00860] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The density functional (M06) computations on a cooperative multicatalytic reaction involving palladium acetate and a chiral Brønsted acid in the conversion of an indenyl cyclobutanol to spirocyclic indene bearing a quaternary carbon ring junction are reported. A chiral Pd-bis-phosphate is identified as the active catalyst in the enantioselective ring expansion as compared to alternative possibilities wherein the chiral phosphate/phosphoric acid is in the outer sphere of palladium. The enantiocontrolling transition state exhibited more effective C-H···π interactions, lower distortion of the catalyst, and an orthogonal orientation of the bulky phosphate ligands.
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Affiliation(s)
- Garima Jindal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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754
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Monari M, Montroni E, Nitti A, Lombardo M, Trombini C, Quintavalla A. Highly stereoselective [4+2] and [3+2] spiroannulations of 2-(2-oxoindolin-3-ylidene)acetic esters catalyzed by bifunctional thioureas. Chemistry 2015; 21:11038-49. [PMID: 26032428 DOI: 10.1002/chem.201500676] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Indexed: 11/11/2022]
Abstract
A new Michael-Michael cascade reaction between 2-(2-oxoindolin-3-ylidene)acetic esters 1 and nitroenoates 2, catalyzed by bifunctional thioureas, is investigated. The combination of the two Michael reactions results in a novel and facile [4+2] or [3+2] spiroannulation process, which is characterized by the following features: 1) two carbon-carbon bonds and four stereocenters, including a quaternary spiro carbon, are formed under mild conditions; 2) an unprecedented and stereochemically defined substitution pattern on the spirocarbocyclic unit is obtained; 3) the double-bond configuration of the donor-acceptor nitroenoate 2 determines the absolute configuration of the spiro center, whereas the remaining stereocenters are formed under control of the catalyst. The effect on the final stereochemical outcome of structural variations of each starting material, catalyst, and experimental conditions is analyzed in detail. In particular, the use of specifically designed chiral nitroenoates enables diverse polyfunctional spirocyclohexane derivatives containing six consecutive stereogenic centers to be constructed. To our knowledge, this is the first asymmetric organocatalytic strategy enabling both five- and six-membered β-nitro spirocarbocyclic oxindoles.
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Affiliation(s)
- Magda Monari
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Elisa Montroni
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Andrea Nitti
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Marco Lombardo
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Claudio Trombini
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Arianna Quintavalla
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy).
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755
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Chang YP, Gurubrahamam R, Chen K. Enantioselective Synthesis of Functionalized Polycarbocycles via a Three-Component Organocascade Quadruple Reaction. Org Lett 2015; 17:2908-11. [PMID: 26020799 DOI: 10.1021/acs.orglett.5b01040] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient organocascade quadruple reaction was conducted to synthesize a functionalized spiropolycyclic scaffold in high chemical yields (43-80%) and excellent levels of stereoselectivity (up to >19:1 dr and 99% ee). The quadruple reaction proceeded smoothly between 1,3-indanedione and aromatic aldehydes with concomitant desymmetrization of prochiral 4-substituted cyclohexanones through the Knoevenagel/Michael/aldol/aldol reaction sequence catalyzed by a bifunctional thiourea catalyst. Two of the formed products were transformed into spirocyclic epoxides containing four contiguous quaternary centers.
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Affiliation(s)
- Yun-Pu Chang
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Ramani Gurubrahamam
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Kwunmin Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
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756
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You Y, Cui BD, Zhou MQ, Zuo J, Zhao JQ, Xu XY, Zhang XM, Yuan WC. Organocatalytic Asymmetric Michael/Friedel–Crafts Cascade Reaction of 3-Pyrrolyl-oxindoles and α,β-Unsaturated Aldehydes for the Construction of Chiral Spiro[5,6-dihydropyrido[1,2-a]pyrrole-3,3′-oxindoles]. J Org Chem 2015; 80:5951-7. [DOI: 10.1021/acs.joc.5b00597] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yong You
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 10049, China
| | - Bao-Dong Cui
- School
of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Ming-Qiang Zhou
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 10049, China
| | - Jian Zuo
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 10049, China
| | - Jian-Qiang Zhao
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 10049, China
| | - Xiao-Ying Xu
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Mei Zhang
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wei-Cheng Yuan
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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757
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Chauhan P, Mahajan S, Raabe G, Enders D. Organocatalytic one-pot 1,4-/1,6-/1,2-addition sequence for the stereocontrolled formation of six consecutive stereocenters. Chem Commun (Camb) 2015; 51:2270-2. [PMID: 25563802 PMCID: PMC4612129 DOI: 10.1039/c4cc09730k] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An unprecedented stereoselective organocatalytic one-pot 1,4-/1,6-/1,2-addition sequence between β-dicarbonyl compounds, β-nitroalkenes and 4-nitro-5-styrylisoxazoles sequentially catalyzed by low loading of a squaramide catalyst and an achiral base has been developed. The protocol opens an efficient entry to isoxazole bearing cyclohexanes with six consecutive stereogenic centers including one tetrasubstituted carbon in good yields and excellent diastereo- and enantioselectivities.
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Affiliation(s)
- Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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758
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Li B, Guo S, Zhang J, Zhang X, Fan X. Selective Access to 3-Cyano-1H-indoles, 9H-Pyrimido[4,5-b]indoles, or 9H-Pyrido[2,3-b]indoles through Copper-Catalyzed One-Pot Multicomponent Cascade Reactions. J Org Chem 2015; 80:5444-56. [DOI: 10.1021/acs.joc.5b00239] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Bin Li
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Shenghai Guo
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Ju Zhang
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xinying Zhang
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xuesen Fan
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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759
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Kaplaneris N, Koutoulogenis G, Raftopoulou M, Kokotos CG. 4-Fluoro and 4-Hydroxy Pyrrolidine-thioxotetrahydropyrimidinones: Organocatalysts for Green Asymmetric Transformations in Brine. J Org Chem 2015; 80:5464-73. [PMID: 25942500 DOI: 10.1021/acs.joc.5b00283] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The synthesis of both trans- and cis-diastereomers of pyrrolidinine-thioxotetrahydropyrimidinone bearing either a fluorine or a hydroxyl group was accomplished. The new compounds were tested for their catalytic properties in a variety of asymmetric organic transformations and compared with the first generation catalyst. It was found that the new catalysts could efficiently catalyze the reactions in brine, without the use of organic solvent, and by employing an almost stoichiometric amount of reagents. Thus, the products were isolated by simple extractions, avoiding the use of chromatography in excellent yields, diastereoselectivities, and enantioselectivities.
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Affiliation(s)
- Nikolaos Kaplaneris
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Giorgos Koutoulogenis
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Marianna Raftopoulou
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
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760
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Brindani N, Rassu G, Dell'Amico L, Zambrano V, Pinna L, Curti C, Sartori A, Battistini L, Casiraghi G, Pelosi G, Greco D, Zanardi F. Organocatalytic, Asymmetric Eliminative [4+2] Cycloaddition of Allylidene Malononitriles with Enals: Rapid Entry to Cyclohexadiene-Embedding Linear and Angular Polycycles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501894] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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761
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Brindani N, Rassu G, Dell'Amico L, Zambrano V, Pinna L, Curti C, Sartori A, Battistini L, Casiraghi G, Pelosi G, Greco D, Zanardi F. Organocatalytic, Asymmetric Eliminative [4+2] Cycloaddition of Allylidene Malononitriles with Enals: Rapid Entry to Cyclohexadiene-Embedding Linear and Angular Polycycles. Angew Chem Int Ed Engl 2015; 54:7386-90. [PMID: 25950770 DOI: 10.1002/anie.201501894] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 03/31/2015] [Indexed: 11/06/2022]
Abstract
A direct aminocatalytic synthesis has been developed for the chemo-, regio-, diastereo-, and enantioselective construction of densely substituted polycyclic carbaldehydes containing fused cyclohexadiene rings. The chemistry utilizes, for the first time, remotely enolizable π-extended allylidenemalononitriles as electron-rich 1,3-diene precursors in a direct eliminative [4+2] cycloaddition with both aromatic and aliphatic α,β-unsaturated aldehydes. The generality of the process is demonstrated by approaching 6,6-, 5,6-, 7,6-, 6,6,6-, and 6,5,6-fused ring systems, as well as biorelevant steroid-like 6,6,6,6,5- and 6,6,6,5,6-rings. A stepwise reaction mechanism for the key [4+2] addition is proposed as a domino bis-vinylogous Michael/Michael/retro-Michael reaction cascade. The utility of the malononitrile moiety as traceless activating group of the dicyano nucleophilic substrates is demonstrated.
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Affiliation(s)
- Nicoletta Brindani
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy).,Dipartimento di Scienze degli Alimenti, Università degli Studi di Parma, Parma (Italy)
| | - Gloria Rassu
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Traversa La Crucca 3, 07100 Li Punti Sassari (Italy).
| | - Luca Dell'Amico
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy).,Institute of Chemical Research of Catalonia, Tarragona (Spain)
| | - Vincenzo Zambrano
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Traversa La Crucca 3, 07100 Li Punti Sassari (Italy)
| | - Luigi Pinna
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, Sassari (Italy)
| | - Claudio Curti
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy)
| | - Andrea Sartori
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy)
| | - Lucia Battistini
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy)
| | - Giovanni Casiraghi
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy)
| | - Giorgio Pelosi
- Dipartimento di Chimica, Università degli Studi di Parma, Parma (Italy)
| | - Daniela Greco
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy)
| | - Franca Zanardi
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27A, 43124 Parma (Italy).
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762
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Barbier V, Couty F, David ORP. Morita-Baylis-Hillman Reactions with Nitroalkenes: A Case Study. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500207] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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763
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Fan XS, Zhang J, Li B, Zhang XY. One-pot Sequential Reactions Featuring a Copper-catalyzed Amination Leading to Pyrido[2′,1′:2,3]imidazo[4,5-c]quinolines and Dihydropyrido[2′,1′:2,3]imidazo[4,5-c]quinolines. Chem Asian J 2015; 10:1281-5. [DOI: 10.1002/asia.201500266] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Indexed: 01/15/2023]
Affiliation(s)
- Xue-Sen Fan
- School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Key Laboratory for Environmental Pollution Control; Henan Normal University; 46 Jianshe Road, Xinxiang Henan 453007 P. R. China
| | - Ju Zhang
- School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Key Laboratory for Environmental Pollution Control; Henan Normal University; 46 Jianshe Road, Xinxiang Henan 453007 P. R. China
| | - Bin Li
- School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Key Laboratory for Environmental Pollution Control; Henan Normal University; 46 Jianshe Road, Xinxiang Henan 453007 P. R. China
| | - Xin-Ying Zhang
- School of Chemistry and Chemical Engineering; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Key Laboratory for Environmental Pollution Control; Henan Normal University; 46 Jianshe Road, Xinxiang Henan 453007 P. R. China
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764
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Kumar TP, Shekhar RC, Sunder KS, Vadaparthi R. Myrtanyl-prolinamide: a new chiral organocatalyst for stereoselective aldol reactions. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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765
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Huang JZ, Zhang CL, Zhu YF, Li LL, Chen DF, Han ZY, Gong LZ. Organocatalytic Highly Enantioselective Substitution of 3-(1-Tosylalkyl)indoles with Oxindoles Enables the First Total Synthesis of (+)-Trigolutes B. Chemistry 2015; 21:8389-93. [PMID: 25916808 DOI: 10.1002/chem.201500349] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Indexed: 12/30/2022]
Abstract
A highly enantioselective organocatalytic substitution of 3-(1-tosylalkyl)indoles with oxindoles has been established by using chiral bifunctional organocatalysts, providing an efficient entry to multiply functionalized 3,3'-disubstituted oxindoles, and was exploited as the key step to enable the first asymmetric total synthesis of optically pure (+)-trigolutes B to be accomplished in a concise manner, within seven steps with an 18% overall yield.
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Affiliation(s)
- Jian-Zhou Huang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm
| | - Chen-Long Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm
| | - Yi-Fan Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm
| | - Lu-Lu Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm
| | - Dian-Feng Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm
| | - Zhi-Yong Han
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026 (P. R. China), Fax: (+86) 551-360-6266 http://staff.ustc.edu.cn/∼gonglz/index.htm. .,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) (P. R. China).
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766
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Mironov VF, Baronova TA, Mironova EV, Dimukhametov MN, Krivolapov DB, Abdrakhmanova LM. Synthesis and steric structure of 3′,3′,5′-trimethyl-7′,7′-bis(trifluoromethyl)spiro[1,3,2-benzodioxaphosphole-2,1′-[2,6,8]trioxa[1λ5]phosphabicyclo[3.2.1]octane] and 3′,5′-dimethyl-7′,7′-bis(trifluoromethyl)spiro[1,3,2-benzodioxaphosphole-2,1′-[2,6,8]trioxa[1λ5]phosphabicyclo[3.2.1]oct[3]ene]. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2015. [DOI: 10.1134/s1070428015030203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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767
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Zhao JQ, Zhou MQ, Wu ZJ, Wang ZH, Yue DF, Xu XY, Zhang XM, Yuan WC. Asymmetric Michael/Cyclization Cascade Reaction of 3-Isothiocyanato Oxindoles and 3-Nitroindoles with Amino-Thiocarbamate Catalysts: Enantioselective Synthesis of Polycyclic Spirooxindoles. Org Lett 2015; 17:2238-41. [DOI: 10.1021/acs.orglett.5b00850] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jian-Qiang Zhao
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ming-Qiang Zhou
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Jun Wu
- Chengdu
Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Zhen-Hua Wang
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Deng-Feng Yue
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Ying Xu
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Mei Zhang
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wei-Cheng Yuan
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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768
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Philipps AR, Fritze L, Erdmann N, Enders D. An Asymmetric Organocatalytic Quadruple Domino Reaction Employing a Vinylogous Friedel-Crafts/Michael/Michael/Aldol Condensation Sequence. SYNTHESIS-STUTTGART 2015; 47:2377-2384. [PMID: 26752794 PMCID: PMC4702351 DOI: 10.1055/s-0034-1380197] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2022]
Abstract
An organocatalytic quadruple cascade initiated by a Friedel-Crafts-type reaction is described. The (S)-diphenylprolinol trimethylsilyl ether catalyzed reaction yields highly functionalized cyclohexenecarbaldehydes bearing a 1,1-bis[4-(dialkylamino)phenyl]ethene moiety and three contiguous stereogenic centers. The reaction tolerates various functional groups and all products are obtained with very good diastereoselectivity and with virtually complete enantiomeric excess.
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Affiliation(s)
- Arne R. Philipps
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Lars Fritze
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Nico Erdmann
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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769
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770
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Mahajan S, Chauhan P, Loh CCJ, Uzungelis S, Raabe G, Enders D. Organocatalytic Asymmetric Domino Michael/Henry Reaction of Indolin-3-ones with o-Formyl-β-nitrostyrenes. SYNTHESIS-STUTTGART 2015; 47:1024-1031. [PMID: 26722133 PMCID: PMC4693955 DOI: 10.1055/s-0034-1379943] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A highly diastereo- and enantioselective domino Michael/Henry reaction of 1-acetylindolin-3-ones with o-formyl-(E)-β-nitrostyrenes catalyzed by low loading of a quinine-derived amine-squaramide provides the corresponding indolin-3-one derivatives bearing four adjacent stereogenic centers in good to high yields and with excellent stereoselectivities.
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Affiliation(s)
- Suruchi Mahajan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Charles C. J. Loh
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Server Uzungelis
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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771
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Li J, Zhao H, Jiang X, Wang X, Hu H, Yu L, Zhang Y. The Cyano Group as a Traceless Activation Group for the Intermolecular [3+2] Cycloaddition of Azomethine Ylides: A Five-Step Synthesis of (±)-Isoretronecanol. Angew Chem Int Ed Engl 2015; 54:6306-10. [DOI: 10.1002/anie.201500961] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Indexed: 11/10/2022]
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772
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Li J, Zhao H, Jiang X, Wang X, Hu H, Yu L, Zhang Y. The Cyano Group as a Traceless Activation Group for the Intermolecular [3+2] Cycloaddition of Azomethine Ylides: A Five-Step Synthesis of (±)-Isoretronecanol. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500961] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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773
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Feng J, Lin L, Yu K, Liu X, Feng X. Asymmetric Synthesis of Dihydrofurans via Organocatalytic Domino Michael-Alkylation Reaction. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401198] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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774
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Eppe G, Didier D, Marek I. Stereocontrolled Formation of Several Carbon–Carbon Bonds in Acyclic Systems. Chem Rev 2015; 115:9175-206. [DOI: 10.1021/cr500715t] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Guillaume Eppe
- The Mallat Family Laboratory
of Organic Chemistry, Schulich Faculty of Chemistry and The Lise Meitner-Minerva
Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
| | - Dorian Didier
- The Mallat Family Laboratory
of Organic Chemistry, Schulich Faculty of Chemistry and The Lise Meitner-Minerva
Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
| | - Ilan Marek
- The Mallat Family Laboratory
of Organic Chemistry, Schulich Faculty of Chemistry and The Lise Meitner-Minerva
Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
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775
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Huang YY, Yang X, Chen Z, Verpoort F, Shibata N. Catalytic Asymmetric Synthesis of Enantioenriched Heterocycles Bearing a CCF3Stereogenic Center. Chemistry 2015; 21:8664-84. [DOI: 10.1002/chem.201500361] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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776
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Synthesis of dibenzo[b,d]furans through one-pot cascade reactions of 1-arylpenta-3,4-dien-2-ones with activated ketones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.179] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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777
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778
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Cohen DT, Johnston RC, Rosson NT, Cheong PHY, Scheidt KA. Functionalized cyclopentenes through a tandem NHC-catalyzed dynamic kinetic resolution and ambient temperature decarboxylation: mechanistic insight and synthetic application. Chem Commun (Camb) 2015; 51:2690-3. [PMID: 25575249 PMCID: PMC4312178 DOI: 10.1039/c4cc09308a] [Citation(s) in RCA: 18] [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
An unusual room temperature β-lactone decarboxylation facilitated a five-step enantioselective formal synthesis of the cyclopentane core of an estrogen receptor β-agonist. A computational study probed the underlying factors facilitating unprecedented, rapid decarboxylation. Aryl substitution promotes faster reaction in the retro-[2+2] as a result of conjugative stabilization with the forming olefin. Additionally, the configuration of the α-ester in these fused β-lactones leads to differential decarboxylation rates.
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Affiliation(s)
- Daniel T. Cohen
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, USA
| | - Ryne C. Johnston
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, USA
| | - Nicholas T. Rosson
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, USA
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, USA
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, USA
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779
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Potowski M, Merten C, Antonchick AP, Waldmann H. Catalytic Aerobic Oxidation and Tandem Enantioselective Cycloaddition in Cascade Multicomponent Synthesis. Chemistry 2015; 21:4913-7. [PMID: 25676025 DOI: 10.1002/chem.201500125] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Marco Potowski
- Max-Planck-Institut für Molekulare Physiologie, Otto-Hahn-Strasse 11, 44227 Dortmund (Germany), Fax: (+49) 231-133-2499; Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44227 Dortmund (Germany)
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780
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Zhou P, Cai Y, Lin L, Lian X, Xia Y, Liu X, Feng X. Asymmetric Synthesis of Spirocyclic Oxindole-Fused Tetrahydrothiophenesvia N,N′-Dioxide-Nickel(II) Catalyzed Domino Reaction of 1,4-Dithiane-2,5-diol with 3-Alkenyloxindoles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400964] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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781
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Zhang W, Wang Y, Bai C, Wen J, Wang N. One-Pot Synthesis of Aliphatic Nitro Compounds by Michael/retro-Claisen Fragmentation Domino Reaction. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201400836] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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782
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Triandafillidi I, Bisticha A, Voutyritsa E, Galiatsatou G, Kokotos CG. tert-Butyl ester or benzylamide of the dipeptide Pro-Gly as organocatalysts for the asymmetric aldol reaction. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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783
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Hahn R, Jafari E, Raabe G, Enders D. Organocatalytic Asymmetric Synthesis of Dihydroisoquinolinones via a One-Pot Aza-Henry-Hemiaminalization-Oxidation Sequence. SYNTHESIS-STUTTGART 2015; 47:472-480. [PMID: 26722132 PMCID: PMC4693956 DOI: 10.1055/s-0034-1379398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The asymmetric organocatalytic one-pot synthesis of trans-3,4-disubstituted 3,4-dihydroisoquinolin-1(2H)-ones is described. Starting from 2-(nitromethyl)benzaldehydes and various N-protected aldimines, 5 mol% of a quinine-based squaramide organocatalyst was used to synthesize the title compounds as virtually single diastereomers via an aza-Henry-hemiaminalization-oxidation sequence. Moderate to good yields (39-78%) and moderate to very good enantioselectivities (40-95% ee) were reached.
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Affiliation(s)
- Robert Hahn
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Ehsan Jafari
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Gerhard Raabe
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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784
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Quinine-catalyzed asymmetric domino Mannich-cyclization reactions of 3-isothiocyanato oxindoles with imines for the synthesis of spirocyclic oxindoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.074] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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785
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Kashinath K, Reddy DS. One-pot quadruple/triple reaction sequence: a useful tool for the synthesis of natural products. Org Biomol Chem 2015; 13:970-3. [PMID: 25407375 DOI: 10.1039/c4ob02143f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiple reactions in one pot has always been a useful technique for synthetic organic chemists, as it can minimizes solvent usage, time and the number of purification steps when compared to individual multi-step syntheses. In line with this, here in this perspective we discuss a one-pot quadruple/triple reaction sequence comprising an enyne ring-closing metathesis/cross-metathesis/Diels-Alder/aromatization for the synthesis of natural products setting.
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Affiliation(s)
- K Kashinath
- Division of Organic Chemistry, National Chemical Laboratory, Pune, Maharashtra, India.
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786
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Han B, Huang W, Ren W, He G, Wang JH, Peng C. Asymmetric Synthesis of Cyclohexane-Fused Drug-Like Spirocyclic Scaffolds Containing Six Contiguous Stereogenic CentersviaOrganocatalytic Cascade Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400764] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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787
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Zhou Y, Yang Q, Shen J, Chen X, Peng Y, Gong Y. Merging Asymmetric Henry Reaction with Organocatalytic Cascade Reaction for the Construction of a Chiral Indolizidine Alkaloid Skeleton. J Org Chem 2015; 80:1446-56. [DOI: 10.1021/jo502379v] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yirong Zhou
- Key Laboratory of Small Fuctional Organic Molecule, Ministry
of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, China
| | - Qin Yang
- Key Laboratory of Small Fuctional Organic Molecule, Ministry
of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, China
| | - Jian Shen
- Key Laboratory of Small Fuctional Organic Molecule, Ministry
of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, China
| | - Xin Chen
- Key Laboratory of Small Fuctional Organic Molecule, Ministry
of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, China
| | - Yiyuan Peng
- Key Laboratory of Small Fuctional Organic Molecule, Ministry
of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
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788
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Chauhan P, Mahajan S, Kaya U, Hack D, Enders D. Bifunctional Amine-Squaramides: Powerful Hydrogen-Bonding Organocatalysts for Asymmetric Domino/Cascade Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401003] [Citation(s) in RCA: 412] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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789
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Zou LH, Philipps AR, Raabe G, Enders D. Asymmetric synthesis of fully substituted cyclopentane-oxindoles through an organocatalytic triple Michael domino reaction. Chemistry 2015; 21:1004-8. [PMID: 25470781 PMCID: PMC4648040 DOI: 10.1002/chem.201406047] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Indexed: 12/19/2022]
Abstract
An efficient, highly stereoselective asymmetric synthesis of fully functionalized cyclopentanes bearing an oxindole moiety and several other functional groups in one pot has been developed. Key step is an organocatalytic triple Michael domino reaction forming three C-C bonds and six stereocenters, including a quaternary one. Starting from equimolar amounts of simple substrates, a high molecular complexity can be reached after a Wittig olefination in one pot. The new protocol can easily be scaled up to gram amounts.
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Affiliation(s)
- Liang-Hua Zou
- Institute of Organic Chemistry, RWTH Aachen UniversityLandoltweg 1, 52074 Aachen (Germany) E-mail:
| | - Arne R Philipps
- Institute of Organic Chemistry, RWTH Aachen UniversityLandoltweg 1, 52074 Aachen (Germany) E-mail:
| | - Gerhard Raabe
- Institute of Organic Chemistry, RWTH Aachen UniversityLandoltweg 1, 52074 Aachen (Germany) E-mail:
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen UniversityLandoltweg 1, 52074 Aachen (Germany) E-mail:
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790
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He X, Xiao Y, Du W, Chen Y. Enantioselective Formal [3+3] Cycloadditions of Ketones and Cyclic 1‐Azadienes by Cascade Enamine–Enamine Catalysis. Chemistry 2015; 21:3443-8. [PMID: 25573519 DOI: 10.1002/chem.201404550] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 12/09/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Xiao‐Long He
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041 (China)
| | - You‐Cai Xiao
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041 (China)
| | - Wei Du
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041 (China)
| | - Ying‐Chun Chen
- Key Laboratory of Drug‐Targeting and Drug Delivery System of the Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041 (China)
- College of Pharmacy, Third Military Medical University, Chongqing 400038 (China)
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791
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Gurubrahamam R, Cheng YS, Chen K. Control of Five Contiguous Stereogenic Centers in an Organocatalytic Kinetic Resolution via Michael/Acetalization Sequence: Synthesis of Fully Substituted Tetrahydropyranols. Org Lett 2015; 17:430-3. [DOI: 10.1021/ol5033656] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ramani Gurubrahamam
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - You-Song Cheng
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Kwunmin Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
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792
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Bakthadoss M, Kannan D, Sivakumar N, Malathi P, Manikandan V. Stereoselective construction of functionalized tetracyclic and pentacyclic coumarinopyranpyrazole/pyrimidinedione/coumarin scaffolds using a solid-state melt reaction. Org Biomol Chem 2015; 13:5597-601. [PMID: 25913710 DOI: 10.1039/c5ob00442j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An assembly of tetra / pentacyclic hybrid scaffolds have been synthesized for the first time using a solid-state melt reaction in a stereoselective fashion with excellent yields.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry
- Pondicherry University
- Pondicherry 605 014
- India
- Department of Organic Chemistry
| | - Damodharan Kannan
- Department of Organic Chemistry
- University of Madras
- Chennai 600025
- India
| | | | - Palani Malathi
- Department of Organic Chemistry
- University of Madras
- Chennai 600025
- India
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793
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Guo S, Yuan Y, Xiang J. Copper-catalyzed oxidative alkenylation of C(sp3)–H bonds via benzyl or alkyl radical addition to β-nitrostyrenes. NEW J CHEM 2015. [DOI: 10.1039/c4nj02416h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A new method for the preparation of (E)-β-alkylstyrene derivatives has been developed via the addition of benzyl or alkyl radicals to β-nitrostyrenes using di-tert-butyl peroxide (DTBP) as the oxidant in the presence of Cu powder catalyst.
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Affiliation(s)
- Shengrong Guo
- Department of Chemistry
- Lishui University
- Lishui
- P. R. China
- College of Chemistry and Chemical Engineering
| | - Yanqin Yuan
- Department of Chemistry
- Lishui University
- Lishui
- P. R. China
| | - Jiannan Xiang
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- P. R. China
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794
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Tang J, Chen EYX. Organopolymerization of naturally occurring Tulipalin B: a hydroxyl-functionalized methylene butyrolactone. Org Chem Front 2015. [DOI: 10.1039/c5qo00262a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Naturally occurring, OH-containing, tri-functional Tulipalin B has been successfully polymerized by N-heterocyclic carbene and phosphazene superbase catalysts into polymers with Mn up to 13.2 kg mol−1.
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Affiliation(s)
- Jing Tang
- Department of Chemistry
- Colorado State University
- Fort Collins
- USA
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795
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Huang X, Pham K, Zhang X, Yi WB, Hyatt JH, Tran AP, Jasinski JP, Zhang W. Recyclable organocatalyst-promoted one-pot Michael/aza-Henry/lactamization reactions for fluorinated 2-piperidinones bearing four stereogenic centres. RSC Adv 2015. [DOI: 10.1039/c5ra15306a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A highly efficient method for asymmetric synthesis of fluorinated 2-piperidinones bearing four stereogenic centres is introduced.
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Affiliation(s)
- Xin Huang
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Kenny Pham
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Xiaofeng Zhang
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Wen-Bin Yi
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Jeremy H. Hyatt
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Anthony P. Tran
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | | | - Wei Zhang
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
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796
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Dudognon Y, Du H, Rodriguez J, Bugaut X, Constantieux T. Organocatalytic multicomponent synthesis of enantioenriched polycyclic 1,2,3,4-tetrahydropyridines: key substrate selection enabling regio- and stereoselectivities. Chem Commun (Camb) 2015; 51:1980-2. [DOI: 10.1039/c4cc08469a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A completely regioselective and highly enantioselective organocatalytic multicomponent synthesis of 1,2,3,4-tetrahydropyridines is described.
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Affiliation(s)
- Yohan Dudognon
- Aix Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
| | - Haiying Du
- Aix Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
| | - Jean Rodriguez
- Aix Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
| | - Xavier Bugaut
- Aix Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
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797
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Chen L, You Y, Zhang ML, Zhao JQ, Zuo J, Zhang XM, Yuan WC, Xu XY. Organocatalytic asymmetric Michael addition of 3-substituted oxindoles to α,β-unsaturated acyl phosphonates for the synthesis of 3,3′-disubstituted oxindoles with chiral squaramides. Org Biomol Chem 2015; 13:4413-7. [DOI: 10.1039/c5ob00317b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The first Michael addition of 3-monosubstituted oxindoles to α,β-unsaturated acyl phosphonates is investigated to give 3,3′-disubstituted oxindoles with excellent results.
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Affiliation(s)
- Lin Chen
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Yong You
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Ming-Liang Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Jian-qiang Zhao
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Jian Zuo
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs
- Chengdu Institute of Organic Chemistry
- Chinese Academy of Sciences
- Chengdu 610041
- China
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798
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F. Tietze L, Eichhorst C. An Efficient Domino Sonogashira/Double Carbopalladation/C–H-Activation Reaction Leading to Fluorescent Polycyclic Aromatic Hydrocarbons. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)39] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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799
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Långvik O, Sandberg T, Wärnå J, Murzin DY, Leino R. One-pot synthesis of (R)-2-acetoxy-1-indanone from 1,2-indanedione combining metal catalyzed hydrogenation and chemoenzymatic dynamic kinetic resolution. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01099j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heterogeneously catalyzed one-pot reaction for synthesis of (R)-2-acetoxy-1-indanone is described.
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Affiliation(s)
- Otto Långvik
- Laboratory of Organic Chemistry
- Åbo Akademi University
- FI-20500 Åbo
- Finland
| | - Thomas Sandberg
- Laboratory of Physical Chemistry
- Åbo Akademi University
- FI-20500 Åbo
- Finland
| | - Johan Wärnå
- Laboratory of Industrial Chemistry and Reaction Engineering
- Process Chemistry Centre
- Åbo Akademi University
- FI-20500 Åbo
- Finland
| | - Dmitry Yu. Murzin
- Laboratory of Industrial Chemistry and Reaction Engineering
- Process Chemistry Centre
- Åbo Akademi University
- FI-20500 Åbo
- Finland
| | - Reko Leino
- Laboratory of Organic Chemistry
- Åbo Akademi University
- FI-20500 Åbo
- Finland
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800
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Sun QS, Chen XY, Zhu H, Lin H, Sun XW, Lin GQ. Asymmetric synthesis of poly-substituted spirocyclohexane oxindole via a squaramide catalyzed cascade Michael–Michael–aldol sequence. Org Chem Front 2015. [DOI: 10.1039/c4qo00299g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Asymmetric synthesis of spirocyclohexane oxindoles bearing six contiguous stereocenters has been achieved in good yields (up to 85%) with excellent stereoselectivities (>20 : 1 dr, >99% ee).
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Affiliation(s)
| | - Xiao-Yang Chen
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Hua Zhu
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Hua Lin
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Xing-Wen Sun
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Guo-Qiang Lin
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
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