1
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Zhang Q, Zhang J, Qian H, Ma S. Aerobic Oxidation of PMB Ethers to Carboxylic Acids. Chemistry 2024:e202401815. [PMID: 38925594 DOI: 10.1002/chem.202401815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 06/28/2024]
Abstract
The first aerobic protocol of direct transformation of p-methoxybenzyl (PMB) ethers to carboxylic acids efficiently with Fe(NO3)3 ⋅ 9H2O and TEMPO as catalysts at room temperature has been developed. The reaction accommodates C-Br bond, terminal/non-terminal C-C triple bond, amide, cyano, nitro, ester, and trifluoromethyl groups. Even highly selective oxidative deprotection of different benzylic PMB ethers has been realized. The reaction has been successfully applied to the total synthesis of natural product, (R)-6-hydroxy-7,9-octadecadiynoic acid, demonstrating the practicality of the method. Based on experimental studies, a possible mechanism involving oxygen-stabilized benzylic cation has been proposed.
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Affiliation(s)
- Qian Zhang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Jiabin Zhang
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou, 310027, Zhejiang Province, China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
- Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou, 310027, Zhejiang Province, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
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2
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Kang Q, Mu Y, Yuan Y, Wang Y, Jin S, Wang C, Li Y. Diastereoselective Synthesis of Bicyclo[3.3.0]octenones by Copper-Catalyzed Transannular Ring-Closing Reaction. Org Lett 2022; 24:5924-5928. [PMID: 35930708 DOI: 10.1021/acs.orglett.2c02163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel and efficient copper-catalyzed transannular ring-closing reaction of eight-membered rings has been developed that provides a straightforward way to synthesize bicyclo[3.3.0]octane derivatives in good yields. Mechanistic studies revealed that the reaction pathway might involve chlorination followed by the Kornblum reaction. Readily accessible starting materials and good functional group tolerance make this procedure attractive.
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Affiliation(s)
- Qiongwen Kang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yuanyang Mu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yang Yuan
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Ye Wang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Shuxin Jin
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Chengyu Wang
- School of Chemistry and Chemical Engineering, Linyi University, Shuangling Road, Linyi, Shandong 276000, China
| | - Yanzhong Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
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3
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Capel E, Luis-Barrera J, Sorazu A, Uria U, Prieto L, Reyes E, Carrillo L, Vicario JL. Transannular Approach to 2,3-Dihydropyrrolo[1,2- b]isoquinolin-5(1 H)-ones through Brønsted Acid-Catalyzed Amidohalogenation. J Org Chem 2022; 87:10062-10072. [PMID: 35880953 PMCID: PMC9361296 DOI: 10.1021/acs.joc.2c01045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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A transannular approach has been developed for the construction
of pyrrolo[1,2-b]isoquinolinones starting from benzo-fused
nine-membered enelactams. This process takes place in the presence
of a halogenating agent and under Brønsted acid catalysis and
proceeds via a transannular amidohalogenation, followed by elimination.
The reaction has been found to be wide in scope, enabling the formation
of a variety of tricyclic products in good overall yield, regardless
of the substitution pattern in the initial lactam substrate. The reaction
has also been applied to the total synthesis of a reported topoisomerase
I inhibitor and to the formal synthesis of rosettacin. Further extension
of this methodology allows the preparation of 10-iodopyrrolo[1,2-b]isoquinolinones by using an excess of halogenating agent
and these compounds can be further manipulated through standard Suzuki
coupling chemistry into a variety of 10-aryl-substituted pyrrolo[1,2-b]isoquinolinones.
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Affiliation(s)
- Estefanía Capel
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Javier Luis-Barrera
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Ana Sorazu
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Uxue Uria
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Liher Prieto
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Efraím Reyes
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Luisa Carrillo
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Jose L Vicario
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
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4
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Liu Y, He Y, Liu Y, Wei K, Guo W. Kinetically Controllable Construction of Nine-Membered Carbocycles via Pd-Catalyzed Decarboxylative Cycloaddition. Org Lett 2022; 24:2567-2572. [PMID: 35343709 DOI: 10.1021/acs.orglett.2c00808] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A kinetically controllable strategy toward the construction of otherwise challenging nine-membered carbocycles is reported. This Pd-catalyzed decarboxylative procedure utilizes vinyl methylene cyclic carbonates as the C5-dipole and allylidenemalononitriles as C4-building blocks. The protocol features user-friendly operations with controllable regioselectivity and generates CO2 as the sole byproduct. The formation of synthetically valuable and thermodynamically favored seven-membered carbocycles was also investigated.
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Affiliation(s)
- Yin Liu
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an 710045, China.,School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Yicheng He
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an 710045, China
| | - Yang Liu
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an 710045, China
| | - Kun Wei
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Wusheng Guo
- Frontier Institute of Science and Technology (FIST), Xi'an Jiaotong University, Xi'an 710045, China
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5
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Cullen DR, Gallagher A, Duncan CL, Pengon J, Rattanajak R, Chaplin J, Gunosewoyo H, Kamchonwongpaisan S, Payne A, Mocerino M. Synthesis and evaluation of tetrahydroisoquinoline derivatives against Trypanosoma brucei rhodesiense. Eur J Med Chem 2021; 226:113861. [PMID: 34624822 DOI: 10.1016/j.ejmech.2021.113861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 11/24/2022]
Abstract
Human African Trypanosomiasis (HAT) is a neglected tropical disease caused by the parasitic protozoan Trypanosoma brucei (T. b.), and affects communities in sub-Saharan Africa. Previously, analogues of a tetrahydroisoquinoline scaffold were reported as having in vitro activity (IC50 = 0.25-70.5 μM) against T. b. rhodesiense. In this study the synthesis and antitrypanosomal activity of 80 compounds based around a core tetrahydroisoquinoline scaffold are reported. A detailed structure activity relationship was revealed, and five derivatives (two of which have been previously reported) with inhibition of T. b. rhodesiense growth in the sub-micromolar range were identified. Four of these (3c, 12b, 17b and 26a) were also found to have good selectivity over mammalian cells (SI > 50). Calculated logD values and preliminary ADME studies predict that these compounds are likely to have good absorption and metabolic stability, with the ability to passively permeate the blood brain barrier. This makes them excellent leads for a blood-brain barrier permeable antitrypanosomal scaffold.
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Affiliation(s)
- Danica R Cullen
- School of Molecular and Life Sciences - Curtin University, GPO Box U1987, Perth, WA, 6845, Australia
| | - Ashlee Gallagher
- School of Molecular and Life Sciences - Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.
| | - Caitlin L Duncan
- School of Molecular and Life Sciences - Curtin University, GPO Box U1987, Perth, WA, 6845, Australia
| | - Jutharat Pengon
- BIOTEC Medical Molecular Biotechnology Research Group - National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Roonglawan Rattanajak
- BIOTEC Medical Molecular Biotechnology Research Group - National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Jason Chaplin
- Epichem Pty Ltd. Suite 5, 3 Brodie-Hall Drive Bentley, WA, 6102, Australia
| | - Hendra Gunosewoyo
- Curtin Medical School - Curtin University, GPO Box U1987, Perth, WA, 6845, Australia
| | - Sumalee Kamchonwongpaisan
- BIOTEC Medical Molecular Biotechnology Research Group - National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Alan Payne
- School of Molecular and Life Sciences - Curtin University, GPO Box U1987, Perth, WA, 6845, Australia
| | - Mauro Mocerino
- School of Molecular and Life Sciences - Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.
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6
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Sendra J, Reyes E, Prieto L, Fernández E, Vicario JL. Transannular Enantioselective (3 + 2) Cycloaddition of Cycloalkenone Hydrazones under Brønsted Acid Catalysis. Org Lett 2021; 23:8738-8743. [PMID: 34726408 PMCID: PMC8609578 DOI: 10.1021/acs.orglett.1c03190] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Hydrazones derived from cycloalkenones undergo an enantioselective transannular formal (3 + 2) cycloaddition catalyzed by a chiral phosphoric acid. The reaction provides high yields and excellent stereocontrol in the formation of complex adducts with one or two α-tertiary amine moieties at the ring fusion, and these can be converted into very versatile stereodefined decalin- or octahydro-1H-indene-derived 1,3-diamines through simple reductive N-N cleavage.
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Affiliation(s)
- Jana Sendra
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU). P.O. Box 644, 48080 Bilbao, Spain.,Departament Química Física i Inorgànica, Universidad Rovira i Virgilli, C/Marcel·lí Domingo s/n, 50009 Tarragona, Spain
| | - Efraim Reyes
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU). P.O. Box 644, 48080 Bilbao, Spain
| | - Liher Prieto
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU). P.O. Box 644, 48080 Bilbao, Spain
| | - Elena Fernández
- Departament Química Física i Inorgànica, Universidad Rovira i Virgilli, C/Marcel·lí Domingo s/n, 50009 Tarragona, Spain
| | - Jose L Vicario
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU). P.O. Box 644, 48080 Bilbao, Spain
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7
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Connon R, Roche B, Rokade BV, Guiry PJ. Further Developments and Applications of Oxazoline-Containing Ligands in Asymmetric Catalysis. Chem Rev 2021; 121:6373-6521. [PMID: 34019404 PMCID: PMC8277118 DOI: 10.1021/acs.chemrev.0c00844] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 12/27/2022]
Abstract
The chiral oxazoline motif is present in many ligands that have been extensively applied in a series of important metal-catalyzed enantioselective reactions. This Review aims to provide a comprehensive overview of the most significant applications of oxazoline-containing ligands reported in the literature starting from 2009 until the end of 2018. The ligands are classified not by the reaction to which their metal complexes have been applied but by the nature of the denticity, chirality, and donor atoms involved. As a result, the continued development of ligand architectural design from mono(oxazolines), to bis(oxazolines), to tris(oxazolines) and tetra(oxazolines) and variations thereof can be more easily monitored by the reader. In addition, the key transition states of selected asymmetric transformations will be given to illustrate the features that give rise to high levels of asymmetric induction. As a further aid to the reader, we summarize the majority of schemes with representative examples that highlight the variation in % yields and % ees for carefully selected substrates. This Review should be of particular interest to the experts in the field but also serve as a useful starting point to new researchers in this area. It is hoped that this Review will stimulate both the development/design of new ligands and their applications in novel metal-catalyzed asymmetric transformations.
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Affiliation(s)
- Robert Connon
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Brendan Roche
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Balaji V. Rokade
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
| | - Patrick J. Guiry
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
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8
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Hassan M, Krieg S, Ndefo Nde C, Roos J, Maier TJ, El Rady EA, Raslan MA, Sadek KU, Manolikakes G. Streamlined One‐Pot Synthesis of Nitro Fatty Acids. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100247] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mohamed Hassan
- Department of Chemistry TU Kaiserslautern Erwin-Schrödinger-Str. Geb. 54 67663 Kaiserslautern Germany
- Department of Chemistry, Faculty of Science Aswan University Aswan 81528 Egypt
| | - Sara‐Cathrin Krieg
- Department of Chemistry TU Kaiserslautern Erwin-Schrödinger-Str. Geb. 54 67663 Kaiserslautern Germany
| | - Cedric Ndefo Nde
- Department of Chemistry TU Kaiserslautern Erwin-Schrödinger-Str. Geb. 54 67663 Kaiserslautern Germany
| | - Jessica Roos
- Paul-Ehrlich-Institute Federal Institute for Vaccines and Biomedicines Paul-Ehrlich-Straße 51–59 63225 Langen Germany
| | - Thorsten J. Maier
- Paul-Ehrlich-Institute Federal Institute for Vaccines and Biomedicines Paul-Ehrlich-Straße 51–59 63225 Langen Germany
| | - Eman A. El Rady
- Department of Chemistry, Faculty of Science Aswan University Aswan 81528 Egypt
| | - Mohamed A. Raslan
- Department of Chemistry, Faculty of Science Aswan University Aswan 81528 Egypt
| | - Kamal U. Sadek
- Chemistry Department, Faculty of Science Minia University Minia 61519 Egypt
| | - Georg Manolikakes
- Department of Chemistry TU Kaiserslautern Erwin-Schrödinger-Str. Geb. 54 67663 Kaiserslautern Germany
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9
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Sendra J, Manzano R, Reyes E, Vicario JL, Fernández E. Catalytic Stereoselective Borylative Transannular Reactions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jana Sendra
- Department Química Física i InorgànicaUniversity Rovira i Virgili C/ Marcel⋅lí Domingo s/n Spain
- Department of Organic Chemistry IIUniversity of the Basque Country (UPV/EHU) P.O. Box 644 48080 Bilbao Spain
| | - Ruben Manzano
- Department of Organic Chemistry IIUniversity of the Basque Country (UPV/EHU) P.O. Box 644 48080 Bilbao Spain
| | - Efraim Reyes
- Department of Organic Chemistry IIUniversity of the Basque Country (UPV/EHU) P.O. Box 644 48080 Bilbao Spain
| | - Jose L. Vicario
- Department of Organic Chemistry IIUniversity of the Basque Country (UPV/EHU) P.O. Box 644 48080 Bilbao Spain
| | - Elena Fernández
- Department Química Física i InorgànicaUniversity Rovira i Virgili C/ Marcel⋅lí Domingo s/n Spain
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10
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Sendra J, Manzano R, Reyes E, Vicario JL, Fernández E. Catalytic Stereoselective Borylative Transannular Reactions. Angew Chem Int Ed Engl 2020; 59:2100-2104. [PMID: 31730740 DOI: 10.1002/anie.201913438] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Indexed: 11/09/2022]
Abstract
Medium-sized carbocycles containing an α,β-unsaturated ketone moiety as Michael acceptor site and a ketone moiety as internal electrophilic site are ideal substrates to conduct Cu(I)-catalyzed conjugated borylation followed by electrophilic intramolecular trapping that results into a pioneer transannular borylative ring closing reaction. The relative configuration of three adjacent stereocenters is controlled, giving access to a single diastereoisomer for a wide range of substrates tested. Moreover, when a chiral ligand is incorporated, the reaction provides enantioenriched polycyclic products with up to 99 % ee.
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Affiliation(s)
- Jana Sendra
- Department Química Física i Inorgànica, University Rovira i Virgili, C/ Marcel⋅lí Domingo s/n, Spain.,Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain
| | - Ruben Manzano
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain
| | - Efraim Reyes
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain
| | - Jose L Vicario
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain
| | - Elena Fernández
- Department Química Física i Inorgànica, University Rovira i Virgili, C/ Marcel⋅lí Domingo s/n, Spain
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11
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Mato R, Reyes E, Carrillo L, Uria U, Prieto L, Manzano R, Vicario JL. Catalytic enantioselective domino Michael/transannular aldol reaction under bifunctional catalysis. Chem Commun (Camb) 2020; 56:13149-13152. [DOI: 10.1039/d0cc05981a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral bifunctional tertiary amine/squaramides catalyze the enantioselective Michael/transannular aldol reaction on medium-sized cyclic ketoenones leading to bicycle[5.4.0]undecanes.
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Affiliation(s)
- Raquel Mato
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
| | - Efraim Reyes
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
| | - Luisa Carrillo
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
| | - Uxue Uria
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
| | - Liher Prieto
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
| | - Ruben Manzano
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
| | - Jose L. Vicario
- Department of Organic Chemistry II
- University of the Basque Country
- 48080 Bilbao
- Spain
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12
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Palanivel A, Mubeen S, Warner T, Ahmed N, Clive DLJ. Formation of Enol Ethers by Radical Decarboxylation of α-Alkoxy β-Phenylthio Acids. J Org Chem 2019; 84:12542-12552. [PMID: 31462047 DOI: 10.1021/acs.joc.9b02042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Enol ethers are formed by radical decarboxylation of α-alkoxy β-phenylthio acids via the corresponding Barton esters. The phenylthio acids were usually made by the known regioselective reaction of α,β-epoxy acids with PhSH in the presence of InCl3, followed by O-alkylation of the resulting alcohol. In one case, thiol addition to an α,β-unsaturated ethoxymethyl ester was used.
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Affiliation(s)
- Ashokkumar Palanivel
- Chemistry Department , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Sidra Mubeen
- Chemistry Department , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Thomas Warner
- Chemistry Department , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Nayeem Ahmed
- Chemistry Department , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
| | - Derrick L J Clive
- Chemistry Department , University of Alberta , Edmonton , Alberta T6G 2G2 , Canada
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13
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Mato R, Manzano R, Reyes E, Carrillo L, Uria U, Vicario JL. Catalytic Enantioselective Transannular Morita–Baylis–Hillman Reaction. J Am Chem Soc 2019; 141:9495-9499. [DOI: 10.1021/jacs.9b03679] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Raquel Mato
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Rubén Manzano
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Efraim Reyes
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Luisa Carrillo
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Uxue Uria
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Jose L. Vicario
- Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
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14
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Ahn DK, Kang YW, Woo SK. Oxidative Deprotection of p-Methoxybenzyl Ethers via Metal-Free Photoredox Catalysis. J Org Chem 2019; 84:3612-3623. [PMID: 30781954 DOI: 10.1021/acs.joc.8b02951] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An efficient and greener deprotection method for p-methoxybenzyl (PMB) ethers using a metal-free visible light photoredox catalyst and air and ammonium persulfate as the terminal oxidants is presented. Various functional groups and protecting groups were tolerated in the developed method to achieve good to excellent yields in short reaction times. Significantly, the developed method was compatible with PMB ethers derived from primary, secondary, and tertiary alcohols and a gram-scale reaction. Mechanistic studies support a proposed reaction mechanism that involves single electron oxidation of the PMB ether.
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Affiliation(s)
- Deok Kyun Ahn
- Department of Chemistry , University of Ulsan , 93 Daehak-Ro , Nam-Gu, Ulsan 44610 , Korea
| | - Young Woo Kang
- Department of Chemistry , University of Ulsan , 93 Daehak-Ro , Nam-Gu, Ulsan 44610 , Korea
| | - Sang Kook Woo
- Department of Chemistry , University of Ulsan , 93 Daehak-Ro , Nam-Gu, Ulsan 44610 , Korea
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15
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Huber T, Wildermuth RE, Magauer T. 9-Membered Carbocycles: Strategies and Tactics for their Synthesis. Chemistry 2018; 24:12107-12120. [PMID: 29356173 PMCID: PMC6420057 DOI: 10.1002/chem.201705919] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Indexed: 11/12/2022]
Abstract
Many natural products comprising a nine-membered carbocyclic core structure exhibit interesting biological effects. However, only a minority have succumbed to their synthesis in the past. The synthesis of functionalized nine-membered carbocycles still remains a challenging goal for synthetic chemists, mainly due to their high ring strain. Different strategies to overcome the unfavorable enthalpic and entropic factors associated with their formation are highlighted in this Concept article. The presented methods are classified into two different categories: (1) the ring-expansion of smaller rings or the ring-contraction of larger rings and (2) the direct cyclization of acyclic precursors.
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Affiliation(s)
- Tatjana Huber
- Department of Chemistry and PharmacyLudwig-Maximillians University MunichButenandtstrasse 5–1381377MunichGermany
| | - Raphael E. Wildermuth
- Institute of Organic Chemistry and Center for Molecular BiosciencesUniversity of InnsbruckInnrain 80–826020InnsbruckAustria
| | - Thomas Magauer
- Institute of Organic Chemistry and Center for Molecular BiosciencesUniversity of InnsbruckInnrain 80–826020InnsbruckAustria
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16
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Lai ZW, Liu C, Sun H, You SL. Asymmetric Synthesis of 3-Allyloxindoles and 3-Allenyloxindoles by Scandium(III)-Catalyzed Claisen Rearrangement Reactions. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201700486] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zeng-Wei Lai
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu; Shanghai 200032 China
- State Key Laboratory of Natural Medicines and Center of Drug Discovery; China Pharmaceutical University, 24 Tongjia Xiang; Nanjing Jiangsu 210009 China
| | - Chuan Liu
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu; Shanghai 200032 China
| | - Hongbin Sun
- State Key Laboratory of Natural Medicines and Center of Drug Discovery; China Pharmaceutical University, 24 Tongjia Xiang; Nanjing Jiangsu 210009 China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu; Shanghai 200032 China
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17
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Marinozzi M, Pertusati F, Serpi M. λ5-Phosphorus-Containing α-Diazo Compounds: A Valuable Tool for Accessing Phosphorus-Functionalized Molecules. Chem Rev 2016; 116:13991-14055. [DOI: 10.1021/acs.chemrev.6b00373] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maura Marinozzi
- Dipartimento
di Scienze Farmaceutiche, Università degli Studi di Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Fabrizio Pertusati
- School
of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, United Kingdom
| | - Michaela Serpi
- School
of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, United Kingdom
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18
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Mullens P, Cleator E, McLaughlin M, Bishop B, Edwards J, Goodyear A, Andreani T, Jin Y, Kong J, Li H, Williams M, Zacuto M. Two Approaches to the Chemical Development and Large-Scale Preparation of a Pyrimidyl Tetrazole Intermediate. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Mullens
- Department of Process & Analytical Chemistry, Merck, Sharp and Dohme Ltd., Hertford Road, Hoddesdon, EN11 9BU, U.K
| | - Ed Cleator
- Department of Process & Analytical Chemistry, Merck, Sharp and Dohme Ltd., Hertford Road, Hoddesdon, EN11 9BU, U.K
| | - Mark McLaughlin
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Brian Bishop
- Department of Process & Analytical Chemistry, Merck, Sharp and Dohme Ltd., Hertford Road, Hoddesdon, EN11 9BU, U.K
| | - John Edwards
- Department of Process & Analytical Chemistry, Merck, Sharp and Dohme Ltd., Hertford Road, Hoddesdon, EN11 9BU, U.K
| | - Adrian Goodyear
- Department of Process & Analytical Chemistry, Merck, Sharp and Dohme Ltd., Hertford Road, Hoddesdon, EN11 9BU, U.K
| | - Teresa Andreani
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Yan Jin
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Jongrock Kong
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Hongmei Li
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Michael Williams
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Michael Zacuto
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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19
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Kiedrowski VV, Quentin F, Golz C, Strohmann C, Preut H, Hiersemann M. (4S,5S,6R,E)-3,5-Dimethyl-6-vinylhept-2-ene-1,4,7-triol. IUCRDATA 2016. [DOI: 10.1107/s2414314616006970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The title compound, C11H20O3, was obtained in the course of the total syntheses of curvicollides A–C and features the same relative configuration for the central lactone moiety as that reported for the latter compounds. In the crystal, molecules are linkedviaO—H...O hydrogen bonds: all of the OH groups act as donors as well as acceptors for these bonds, hence each molecule is bound to six surrounding molecules and a three-dimensional network is formed. The absolute structure was confirmed by refinement of the Flack parameter.
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20
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α-Alkylidene-γ-butyrolactone synthesis via one-pot C–H insertion/olefination: substrate scope and the total synthesis of (±)-cedarmycins A and B. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.09.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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4-Halo-2-azabuta-1,3-dienes as intermediates in the rhodium carbenoid-initiated transformation of 2-halo-2H-azirines into 2,3-dihydroazetes and 2,5-dihydrooxazoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Uetake Y, Uwamori M, Nakada M. Enantioselective Approach to Polycyclic Polyprenylated Acylphloroglucinols via Catalytic Asymmetric Intramolecular Cyclopropanation. J Org Chem 2015; 80:1735-45. [DOI: 10.1021/jo5026699] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yuta Uetake
- Department
of Chemistry and Biochemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masahiro Uwamori
- Department
of Chemistry and Biochemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masahisa Nakada
- Department
of Chemistry and Biochemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
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23
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Day DP, Dann T, Blagg RJ, Wildgoose GG. Synthesis and characterization of redox active cyrhetrene–triazole click products. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.07.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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Becker J, Butt L, von Kiedrowski V, Mischler E, Quentin F, Hiersemann M. Catalytic Asymmetric Claisen Rearrangement of Gosteli-Type Allyl Vinyl Ethers: Total Synthesis of (−)-9,10-Dihydroecklonialactone B. J Org Chem 2014; 79:3040-51. [DOI: 10.1021/jo5001466] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Julia Becker
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Lena Butt
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Valeska von Kiedrowski
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Elisabeth Mischler
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Florian Quentin
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie und
Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
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25
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Stereoselective construction of the ABC-ring system of fusidane triterpenes via intermolecular/transannular Michael reaction cascade. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Day DP, Dann T, Hughes DL, Oganesyan VS, Steverding D, Wildgoose GG. Cymantrene–Triazole “Click” Products: Structural Characterization and Electrochemical Properties. Organometallics 2014. [DOI: 10.1021/om4007642] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- David P. Day
- Energy & Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Thomas Dann
- Energy & Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - David. L. Hughes
- Energy & Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Vasily S. Oganesyan
- Energy & Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Dietmar Steverding
- BioMedical Research Centre, Norwich Medical
School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Gregory G. Wildgoose
- Energy & Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom
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27
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Becker J, Butt L, von Kiedrowski V, Mischler E, Quentin F, Hiersemann M. Total Synthesis of (−)-Ecklonialactone B. Org Lett 2013; 15:5982-5. [DOI: 10.1021/ol4028418] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julia Becker
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Lena Butt
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Valeska von Kiedrowski
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Elisabeth Mischler
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Florian Quentin
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, 44227 Dortmund, Germany
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28
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Abstract
Highly enantio- and diastereoselective transannular ketone-ene reactions are catalyzed by a new chromium(III) triflate tridentate Schiff base complex. Electronically unactivated keto-olefins undergo heteroene reactions at ambient temperature to afford enantioenriched bicyclic alcohols, common structural motifs in natural products. The kinetic resolution of a configurationally stable planar-chiral cyclodecenone is also described.
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Affiliation(s)
- Naomi S. Rajapaksa
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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