1
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Design, synthesis and biological evaluation of difluoroalkylated protoilludanes obtained by a practical radical cascade difluoroalkylation-cyclization reaction. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2021.153594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Didier D, Reiners F. Uncommon Four-Membered Building Blocks - Cyclobutenes, Azetines and Thietes. CHEM REC 2021; 21:1144-1160. [PMID: 33734571 DOI: 10.1002/tcr.202100011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 12/15/2022]
Abstract
Strained ring systems have gained considerable importance over the last few years for their implication in natural product syntheses or in drug discovery programs. We present herein a recollection of our work on the construction and functionalization of unsaturated four-membered carbo- and heterocycles in the context of the literature, as well as their applications in further reactions.
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Affiliation(s)
- Dorian Didier
- Department of Chemistry, Ludwig-Maximilians Universität, Butenandtstraße 5-13, 81377, Munich, Germany
| | - Felix Reiners
- Department of Chemistry, Ludwig-Maximilians Universität, Butenandtstraße 5-13, 81377, Munich, Germany
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3
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Zhong C, Wang S, Lu P. Chiral lithium amide mediated desymmetrization of 3-substituted cyclobutanone. Org Chem Front 2021. [DOI: 10.1039/d1qo00015b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical approach to access enantioenriched cyclobutenes was developed via a chiral lithium amide mediated deprotonation of 3-substituted cyclobutanones. Further elaborations led to stereoselective assembly of tricyclic skeletons.
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Affiliation(s)
- Changxu Zhong
- Department of Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Shaowei Wang
- Department of Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Ping Lu
- Department of Research Center for Molecular Recognition and Synthesis
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
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4
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Reiners F, Joseph E, Nißl B, Didier D. Stereoselective Access to Azetidine-Based α-Amino Acids and Applications to Small Peptide Synthesis. Org Lett 2020; 22:8533-8537. [PMID: 33052683 DOI: 10.1021/acs.orglett.0c03131] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Non-natural azetidine-based amino acids (Aze) present interesting features in protein engineering. A simple organometallic route toward unsaturated carboxylic acid precursors is presented. Subsequent metal-catalyzed asymmetric reduction allowed for the synthesis of a new library of 2-azetidinylcarboxylic acids, which were finally employed in the formation of small peptide chains.
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Affiliation(s)
- Felix Reiners
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Emanuel Joseph
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Benedikt Nißl
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 Munich, Germany
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5
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Baumann AN, Reiners F, Siegle AF, Mayer P, Trapp O, Didier D. Thiete Dioxides as Templates Towards Twisted Scaffolds and Macrocyclic Structures. Chemistry 2020; 26:6029-6035. [PMID: 32119146 PMCID: PMC7318563 DOI: 10.1002/chem.201905751] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/14/2020] [Indexed: 11/07/2022]
Abstract
Thiete dioxide units have been employed as a template for further functionalization through C-H activation strategies. Using simple thiete dioxide building blocks, a new library of axially chiral molecules has been synthesized that owe their stability to electrostatic interactions in the solid state. Similar starting materials were further engaged in the formation of cyclic trimeric structures, opening the pathway to unprecedented macrocyclic ring systems.
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Affiliation(s)
- Andreas N. Baumann
- Department of ChemistryLudwig-Maximilians UniversityButenandtstraße 5–1381377MunichGermany
| | - Felix Reiners
- Department of ChemistryLudwig-Maximilians UniversityButenandtstraße 5–1381377MunichGermany
| | - Alexander F. Siegle
- Department of ChemistryLudwig-Maximilians UniversityButenandtstraße 5–1381377MunichGermany
| | - Peter Mayer
- Department of ChemistryLudwig-Maximilians UniversityButenandtstraße 5–1381377MunichGermany
| | - Oliver Trapp
- Department of ChemistryLudwig-Maximilians UniversityButenandtstraße 5–1381377MunichGermany
| | - Dorian Didier
- Department of ChemistryLudwig-Maximilians UniversityButenandtstraße 5–1381377MunichGermany
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6
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Mogi Y, Inanaga K, Tokuyama H, Ihara M, Yamaoka Y, Yamada KI, Takasu K. Rapid Assembly of Protoilludane Skeleton through Tandem Catalysis: Total Synthesis of Paesslerin A and Its Structural Revision. Org Lett 2019; 21:3954-3958. [PMID: 31117698 DOI: 10.1021/acs.orglett.9b01089] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A multicomponent domino reaction involving three mechanistically distinct Tf2NH-catalyzed reactions was developed. The reaction cascade enables the assembly of a skewed 5/6/4 tricyclic motif with migration of the reactive site with the assistance of a catalyst. The tricyclic product was used to achieve the first total synthesis of cytotoxic paesslerin A by regioselective C-H insertion of the sulfonyl carbenoid and base-promoted olefin isomerization. Our results led to the revision of the originally proposed tricyclic structure of paesslerin A.
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Affiliation(s)
- Yuzo Mogi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan
| | - Kazato Inanaga
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aobayama , Sendai 980-8578 , Japan
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aobayama , Sendai 980-8578 , Japan
| | - Masataka Ihara
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aobayama , Sendai 980-8578 , Japan
| | - Yousuke Yamaoka
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan
| | - Ken-Ichi Yamada
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan
| | - Kiyosei Takasu
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan
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7
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Baumann AN, Reiners F, Juli T, Didier D. Chemodivergent and Stereoselective Access to Fused Isoxazoline Azetidines and Thietanes through [3 + 2]-Cycloadditions. Org Lett 2018; 20:6736-6740. [PMID: 30351958 DOI: 10.1021/acs.orglett.8b02848] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
By combining efficient methodologies for the preparation of substituted azetines and thietes with a highly regio- and diastereoselective [3 + 2]-cycloaddition, a straightforward pathway for the synthesis of fused isoxazoline azetidines and thietanes has been designed. With minimal steps and starting from commercial sources, a new library of elaborated architectures was synthesized opening up a new class of molecules with large potential in pharmacology. Finally, a retro [2 + 2]-cycloaddition leading to substituted isoxazoles is described.
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Affiliation(s)
- Andreas N Baumann
- Department of Chemistry and Pharmacy , Ludwig-Maximilians-Universität München , Butenandtstraße 5-13 , 81377 Munich , Germany
| | - Felix Reiners
- Department of Chemistry and Pharmacy , Ludwig-Maximilians-Universität München , Butenandtstraße 5-13 , 81377 Munich , Germany
| | - Thomas Juli
- Department of Chemistry and Pharmacy , Ludwig-Maximilians-Universität München , Butenandtstraße 5-13 , 81377 Munich , Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy , Ludwig-Maximilians-Universität München , Butenandtstraße 5-13 , 81377 Munich , Germany
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8
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Eisold M, Müller-Deku A, Reiners F, Didier D. Parallel Approaches for the Functionalization of Thietes: α-Metalation versus C–H Activation. Org Lett 2018; 20:4654-4658. [DOI: 10.1021/acs.orglett.8b01961] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Michael Eisold
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Adrian Müller-Deku
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Felix Reiners
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
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9
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Elena de Orbe M, Echavarren AM. Broadening the Scope of the Gold-Catalyzed [2+2] Cycloaddition Reaction: Synthesis of Vinylcyclobutenes and Further Transformations. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800170] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- M. Elena de Orbe
- Institute of Chemical Research of Catalonia (ICIQ); Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ); Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Orgànica i Analítica; Universitat Rovira i Virgili; C/ Marcel. lí Domingo s/n 43007 Tarragona Spain
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10
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Baumann AN, Schüppel F, Eisold M, Kreppel A, de Vivie-Riedle R, Didier D. Oxidative Ring Contraction of Cyclobutenes: General Approach to Cyclopropylketones including Mechanistic Insights. J Org Chem 2018; 83:4905-4921. [DOI: 10.1021/acs.joc.8b00297] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andreas N. Baumann
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Franziska Schüppel
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Michael Eisold
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Andrea Kreppel
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Regina de Vivie-Riedle
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University, Butenandtstraße 5-13, 81377 Munich, Germany
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11
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Music A, Baumann AN, Eisold M, Didier D. Regiodivergent Stereoselective Access to Fused Alkylideneazetidines. J Org Chem 2018; 83:783-792. [PMID: 29260549 DOI: 10.1021/acs.joc.7b02786] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Following recent advances in the generalization and simplification of 2H-azetine synthesis, a regiodivergent approach to fused 2- and 3-alkylideneazetines was designed via the intermediate formation of unprecedented vinylazetine structures. Concise sequences to the latter are described from which an expected unsaturated fused ring system was isolated with very high yields and regio- and stereoselectivities by [4 + 2] cycloadditions.
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Affiliation(s)
- Arif Music
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstraße 5-13, 81377 Munich, Germany
| | - Andreas N Baumann
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstraße 5-13, 81377 Munich, Germany
| | - Michael Eisold
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstraße 5-13, 81377 Munich, Germany
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12
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García-Morales C, Ranieri B, Escofet I, López-Suarez L, Obradors C, Konovalov AI, Echavarren AM. Enantioselective Synthesis of Cyclobutenes by Intermolecular [2+2] Cycloaddition with Non-C 2 Symmetric Digold Catalysts. J Am Chem Soc 2017; 139:13628-13631. [PMID: 28922911 PMCID: PMC5679663 DOI: 10.1021/jacs.7b07651] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 01/12/2023]
Abstract
The enantioselective intermolecular gold(I)-catalyzed [2+2] cycloaddition of terminal alkynes and alkenes has been achieved using non-C2-chiral Josiphos digold(I) complexes as catalysts, by the formation of the monocationic complex. This new approach has been applied to the enantioselective total synthesis of rumphellaone A.
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Affiliation(s)
- Cristina García-Morales
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Beatrice Ranieri
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Imma Escofet
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Laura López-Suarez
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Carla Obradors
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Andrey I. Konovalov
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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13
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Eisold M, Didier D. Stereoselective Access to Alkylidenecyclobutanes through γ-Selective Cross-Coupling Strategies. Org Lett 2017; 19:4046-4049. [PMID: 28726420 DOI: 10.1021/acs.orglett.7b01803] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Alkylidenecyclobutanes (ACBs) containing all-carbon quaternary stereocenters were simply and efficiently synthesized by combining boron-homologation and γ-selective cross-coupling strategies. This unique sequence led to excellent regio- and diastereoselectivities in the generation of targeted four-membered rings with up to 99% enantiomeric excess using chiral substrates. In addition to the original synthesis of ACBs, the first asymmetric catalytic formation of quaternary stereocenters based on γ-selective cross-coupling reactions is finally shown.
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Affiliation(s)
- Michael Eisold
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstraße 5-13, 81377 Munich, Germany
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