1
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Xu B, Liu C, Dai M. Catalysis-Enabled 13-Step Total Synthesis of (-)-Peyssonnoside A. J Am Chem Soc 2022; 144:19700-19703. [PMID: 36279290 PMCID: PMC11167717 DOI: 10.1021/jacs.2c09919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a 13-step enantioselective and stereoselective total synthesis of (-)-peyssonnoside A, a unique diterpene glucoside with a rare and highly congested pentasubstituted cyclopropane and promising antimicrobial activity. Among the 10 steps to synthesize (-)-peyssonnosol, the aglycone of (-)-peyssonnoside A, eight transition-metal-catalyzed transformations enabled the construction of all new C-C bonds and stereocenters without involving any protecting groups. Notably, a palladium-catalyzed dearomative cyclization was used to build the C-6 spiro all-carbon quaternary center, and a counterintuitive hydrogen atom transfer (HAT)-initiated reductive olefin cross-coupling was realized to forge the pentasubstituted cyclopropane ring with excellent stereoselectivity.
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Affiliation(s)
| | | | - Mingji Dai
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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2
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Abstract
Peyssonnoside A is a marine-derived sulfated diterpenoid glucoside with a unique 5/6/3/6 tetracyclic skeleton with a highly substituted cyclopropane ring deeply embedded into the structure. Herein, we report the first total synthesis of this natural product in a concise, efficient, scalable, and highly diastereoselective fashion. The aglucone peyssonnosol was synthesized in 21% overall yield after 15 steps, featuring a Simmons-Smith cyclopropanation and Mukaiyama hydration, fully controlled by the spatial structure of the substrates.
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Affiliation(s)
- Gleb A Chesnokov
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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3
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Ohmatsu K, Morita Y, Kiyokawa M, Ooi T. Catalytic Asymmetric Cyanoalkylation of Electron-Deficient Olefins with Potassium Cyanide and Alkyl Halides. J Am Chem Soc 2021; 143:11218-11224. [PMID: 34270904 DOI: 10.1021/jacs.1c05380] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The stereoselective cyanoalkylation of electron-deficient olefins with potassium cyanide and alkyl halides was developed based on the utilization of modular chiral 1,2,3-triazolium salts featuring a hydrogen bond-donor ability as catalysts. The reaction involving multiple carbon-carbon bond formations proceeds via the enantioselective conjugate addition of a cyanide ion and the consecutive catalyst-controlled diastereoselective alkylation of intermediary chiral triazolium enolates. Control experiments revealed that the use of a properly tuned chiral triazolium ion as a catalyst and the presence of the cyano functionality in the intermediary enolate are of crucial importance for achieving high levels of acyclic absolute and relative stereocontrol.
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Affiliation(s)
- Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
| | - Yusuke Morita
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
| | - Mari Kiyokawa
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
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4
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Roy S. Prins-Friedel-Crafts Cyclization: Synthesis of Diversely Functionalized Six- Membered Oxacycles. CURR ORG CHEM 2021. [DOI: 10.2174/1385272825666210114105020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Prins cyclization is a well-established synthetic protocol to generate a wide range
of important oxygen heterocycles. It is a cyclization reaction performed by an oxocarbenium
ion that undergoes an intramolecular pi-bond attack to construct a new carbon-carbon bond.
When this cyclization process is conjugated with Friedel-Crafts reaction, it further expands
the synthetic potential by fabricating two different carbon-carbon bonds in one single reaction.
Different acid catalysts mediated the coupled Prins-Friedel-Crafts reaction which is conducted
both in stepwise as well as in tandem fashion. In the stepwise route, three different
reacting components were utilized whereas, the tandem methodology required proper modification
of the initial substrate molecule. An array of allylic, propargylic, other related alkenols,
and carbonyl reactants were employed to carry out the cyclization process. Several oxygenated
heterocycles equipped with diverse functionalities were constructed in a stereoselective manner which again
reinforced the significance of this cyclization protocol undoubtedly. The present mini-review highlights the utilization
of different one-pot stepwise Prins-Friedel-Crafts reactions and the subsequent development of cascade Prins-
Friedel-Crafts cyclization process to furnish intricate molecular architectures of vital six-membered oxacycles.
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Affiliation(s)
- Snigdha Roy
- Department of Chemistry, Banwarilal Bhalotia College, Asansol-713303, West Bengal, India
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5
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Tsujihara T, Tomeba M, Ohkubo-Sato S, Iwabuchi K, Koie R, Tada N, Tamura S, Takehara T, Suzuki T, Kawano T. One-pot reactions of bicyclic zinc enolate generated from Ni-catalyzed reductive cyclization to furnish octahydro-4,7-ethanobenzofuran-9-one derivatives. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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6
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Schatz DJ, Li W, Pronin SV. Catalytic enantioselective conjugate addition en route to paxilline indoloterpenoids. Tetrahedron 2019; 75:3361-3365. [PMID: 33071366 DOI: 10.1016/j.tet.2019.04.076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Development of enantioselective synthesis of precursor en route to paxilline indoloterpenoids is described. Evaluation of 25 diphosphine-based ligands has led to identification of JosiPhos derivative that allows for asymmetric conjugate addition of homoprenyl Grignard reagent to 2-methylcyclopent-2-en-1-one in excellent yield and with appreciable levels of enantioinduction. Application to the conjugate addition of other Grignard reagents is demonstrated.
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Affiliation(s)
- Devon J Schatz
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Wenqin Li
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Sergey V Pronin
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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7
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Vargová D, Némethová I, Plevová K, Šebesta R. Asymmetric Transition-Metal Catalysis in the Formation and Functionalization of Metal Enolates. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04357] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Denisa Vargová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| | - Ivana Némethová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| | - Kristína Plevová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
| | - Radovan Šebesta
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovak Republic
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8
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Wang JYJ, Palacin T, Fletcher SP. β-Chloroaldehydes from Trapping Zirconium Enolates Produced in Asymmetric 1,4-Additions. Org Lett 2018; 21:378-381. [DOI: 10.1021/acs.orglett.8b03520] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiao Yu Joseph Wang
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Thomas Palacin
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Stephen P. Fletcher
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
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9
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Chong Q, Zhang S, Cheng F, Wang J, Hong X, Meng F. N-Heterocyclic Carbene-Cu-Catalyzed Enantioselective Allenyl Conjugate Addition. Org Lett 2018; 20:6896-6900. [PMID: 30350670 DOI: 10.1021/acs.orglett.8b03029] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A catalytic enantioselective conjugate addition with commercially available allenylboronic acid pinacol ester as nucleophile promoted by a chiral copper complex of N-heterocyclic carbene (NHC) is disclosed. This process constitutes an unprecedented instance of the conjugate addition that introduces an allenyl group into α,β-unsaturated carbonyl compounds, affording products that are otherwise difficult to access in up to 92% yield, >98% allenyl addition selectivity and 96:4 enantiomeric ratio. DFT calculations were performed to elucidate the origins of enantioselectivity.
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Affiliation(s)
- Qinglei Chong
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Shuoqing Zhang
- Department of Chemistry , Zhejiang University , 38 Zheda Road , Hangzhou 310027 , China
| | - Fengchang Cheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Jiping Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Xin Hong
- Department of Chemistry , Zhejiang University , 38 Zheda Road , Hangzhou 310027 , China
| | - Fanke Meng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
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10
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Pinheiro DLJ, de Castro PP, Amarante GW. Recent Developments and Synthetic Applications of Nucleophilic Zirconocene Complexes from Schwartz's Reagent. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800852] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Danielle L. J. Pinheiro
- Department of Chemistry; Federal University of Juiz de Fora; Cidade Universitária 36036-900 São Pedro, Juiz de Fora Minas Gerais Brazil
| | - Pedro P. de Castro
- Department of Chemistry; Federal University of Juiz de Fora; Cidade Universitária 36036-900 São Pedro, Juiz de Fora Minas Gerais Brazil
| | - Giovanni W. Amarante
- Department of Chemistry; Federal University of Juiz de Fora; Cidade Universitária 36036-900 São Pedro, Juiz de Fora Minas Gerais Brazil
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11
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Veeraswamy V, Goswami G, Mukherjee S, Ghosh K, Saha ML, Sengupta A, Ghorai MK. Memory of Chirality Concept in Asymmetric Intermolecular Michael Addition of α-Amino Ester Enolates to Enones and Nitroalkenes. J Org Chem 2018; 83:1106-1115. [PMID: 29272115 DOI: 10.1021/acs.joc.7b02315] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly stereoselective asymmetric intermolecular conjugate addition of α-amino ester derivatives to cyclic enones via the memory of chirality (MOC) concept in high yields with excellent diastereo- and enantioselectivity (dr >99:1, up to 99% ee) is reported. The applicability and the generality of the strategy was demonstrated by its further exploration to acyclic α,β-unsaturated ketone and aromatic nitroalkenes, resulting in the formation of δ-keto-α-amino ester derivative and γ-nitro-α-amino ester derivatives, respectively, with excellent ee and dr.
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Affiliation(s)
| | - Gaurav Goswami
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | | | - Koena Ghosh
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Manik Lal Saha
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Arunava Sengupta
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Manas K Ghorai
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
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12
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Chong Q, Yue Z, Zhang S, Ji C, Cheng F, Zhang H, Hong X, Meng F. N-heterocyclic Carbene–Cu-Catalyzed Enantioselective Conjugate Additions with Alkenylboronic Esters as Nucleophiles. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02132] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qinglei Chong
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Zhenting Yue
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Shuoqing Zhang
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, People’s Republic of China
| | - Chonglei Ji
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, People’s Republic of China
| | - Fengchang Cheng
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Haiyan Zhang
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Xin Hong
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, People’s Republic of China
| | - Fanke Meng
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032, People’s Republic of China
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13
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Pape F, Teichert JF. Dealing at Arm's Length: Catalysis with N-Heterocyclic Carbene Ligands Bearing Anionic Tethers. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700124] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Felix Pape
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 115 10623 Berlin Germany
| | - Johannes F. Teichert
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 115 10623 Berlin Germany
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14
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Blons C, Morin MST, Schmid TE, Vives T, Colombel‐Rouen S, Baslé O, Reynaldo T, Covington CL, Halbert S, Cuskelly SN, Bernhardt PV, Williams CM, Crassous J, Polavarapu PL, Crévisy C, Gérard H, Mauduit M. Asymmetric Sequential Cu‐Catalyzed 1,6/1,4‐Conjugate Additions of Hard Nucleophiles to Cyclic Dienones: Determination of Absolute Configurations and Origins of Enantioselectivity. Chemistry 2017; 23:7515-7525. [DOI: 10.1002/chem.201606034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 03/08/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Charlie Blons
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Marie S. T. Morin
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Thibault E. Schmid
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Thomas Vives
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Sophie Colombel‐Rouen
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Olivier Baslé
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Thibault Reynaldo
- Université de Rennes 1 CNRS, UMR 6226 Campus de Beaulieu 35042 Rennes Cedex France
| | - Cody L. Covington
- Department of Chemistry Vanderbilt University Nashville TN 37235 USA
| | - Stéphanie Halbert
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4 place Jussieu F. 75252 Paris Cedex 05 France
| | - Sean N. Cuskelly
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia
| | - Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia
| | - Jeanne Crassous
- Université de Rennes 1 CNRS, UMR 6226 Campus de Beaulieu 35042 Rennes Cedex France
| | | | - Christophe Crévisy
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Hélène Gérard
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4 place Jussieu F. 75252 Paris Cedex 05 France
| | - Marc Mauduit
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
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15
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Abstract
A total synthesis of the cytotoxic terpenoid hortonone C was accomplished and its absolute stereochemistry confirmed. Intermediate (+)-4 was synthesized using either an asymmetric conjugate addition strategy, or by elaboration of the Hajos-Parrish ketone. Reduction of (+)-4 under dissolving-metal conditions and trapping the enolate intermediate served to control the cis-stereochemistry at the ring fusion and provide a silyl enol ether necessary for ring expansion. Comparison of optical rotation data confirmed that the absolute configuration of natural hortonone C is (6S,7S,10S).
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Affiliation(s)
- Doleshwar Niroula
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro NM 87801, United States
| | - Liam P Hallada
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro NM 87801, United States; Department of Biology, New Mexico Institute of Mining and Technology, Socorro NM 87801, United States
| | - Snezna Rogelj
- Department of Biology, New Mexico Institute of Mining and Technology, Socorro NM 87801, United States
| | - Rodolfo Tello-Aburto
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro NM 87801, United States
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16
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Pan JL, Chen T, Zhang ZQ, Li YF, Zhang XM, Zhang FM. A Cu-mediated one-pot Michael addition/α-arylation strategy using a diaryliodonium salt: a direct and efficient approach to α-aryl-β-substituted cyclic ketone scaffolds. Chem Commun (Camb) 2016; 52:2382-5. [PMID: 26730793 DOI: 10.1039/c5cc09837h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The direct and efficient construction of α-aryl-β-substituted cyclic ketone scaffolds has been achieved using a Cu-mediated one-pot Michael addition/α-arylation strategy. The reaction features easily available materials, broad substrate scope, moderate to good yield, and an excellent diastereoselectivity.
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Affiliation(s)
- Jin-Long Pan
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Tao Chen
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Zhi-Qiang Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Yi-Fan Li
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou, 730000, P. R. China.
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17
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Matsumoto K, Nakano Y, Shibata N, Sakaguchi S. Enantioselectivity switch in copper-catalyzed conjugate addition reactions under the influence of a chiral N-heterocyclic carbene–silver complex. RSC Adv 2016. [DOI: 10.1039/c5ra25926f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The reversal of enantioselectivity using the same catalytic system was achieved simply by changing the order of the addition of substrates.
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Affiliation(s)
- Keitaro Matsumoto
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
| | - Yuki Nakano
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
| | - Naoatsu Shibata
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
| | - Satoshi Sakaguchi
- Department of Chemistry and Materials Engineering
- Faculty of Chemistry
- Materials and Bioengineering
- Kansai University
- Suita
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18
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Hung YM, Tseng CH, Uang BJ. Highly enantioselective tandem double Michael reactions catalyzed by Ni(acac)2/(+)-MINBOL complex. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.10.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Formation of Quaternary Stereocentres by Copper-Catalysed Enantioselective Conjugate Addition Reaction. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_158] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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