101
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Du J, Yang X, Wang X, An Q, He X, Pan H, Zuo Z. Photocatalytic Aerobic Oxidative Ring Expansion of Cyclic Ketones to Macrolactones by Cerium and Cyanoanthracene Catalysis. Angew Chem Int Ed Engl 2021; 60:5370-5376. [PMID: 33259085 DOI: 10.1002/anie.202012720] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/16/2020] [Indexed: 12/17/2022]
Abstract
We describe a cerium-catalyzed aerobic oxidative ring expansion for the expedient construction of synthetically challenging macrolactones under visible-light conditions. Cyanoanthracene has been employed as co-catalyst to accelerate the turnover of the cerium cycle leading to a fast conversion within 20 min of irradiation. Taking advantage of the high efficiency and operationally simple conditions, a collection of over 100 macrolactones equipped with ring systems ranging from 9- to 19-membered macrocycles have been prepared from simple building blocks. Moreover, the enabling potential of this strategy to simplify the generation of molecular complexity has been demonstrated through the concise synthesis of sonnerlactone.
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Affiliation(s)
- Jianbo Du
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Xiaokun Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Xin Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Qing An
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Xu He
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Hui Pan
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Zhiwei Zuo
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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102
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Zhang X, Lin L, Li J, Duan S, Long Y, Li J. Recent Progress in the Synthesis of Medium-Sized Ring and Macrocyclic Compounds. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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103
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Millward MJ, Ellis E, Ward JW, Clayden J. Hydantoin-bridged medium ring scaffolds by migratory insertion of urea-tethered nitrile anions into aromatic C-N bonds. Chem Sci 2020; 12:2091-2096. [PMID: 34163972 PMCID: PMC8179327 DOI: 10.1039/d0sc06188c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 12/11/2020] [Indexed: 01/07/2023] Open
Abstract
Bicyclic or tricyclic nitrogen-containing heterocyclic scaffolds were constructed rapidly by intramolecular nucleophilic aromatic substitution of metallated nitriles tethered by a urea linkage to a series of electronically unactivated heterocyclic precursors. The substitution reaction constitutes a ring expansion, enabled by the conformationally constrained tether between the nitrile and the heterocycle. Attack of the metallated urea leaving group on the nitrile generates a hydantoin that bridges the polycyclic products. X-ray crystallography reveals ring-dependant strain within the hydantoin.
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Affiliation(s)
- Makenzie J Millward
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Emily Ellis
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - John W Ward
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
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104
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Chen L, Guo LN, Liu S, Liu L, Duan XH. Visible-light-driven palladium-catalyzed Dowd-Beckwith ring expansion/C-C bond formation cascade. Chem Sci 2020; 12:1791-1795. [PMID: 34163941 PMCID: PMC8179048 DOI: 10.1039/d0sc04399k] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 11/26/2020] [Indexed: 02/03/2023] Open
Abstract
A visible-light-induced palladium-catalyzed Dowd-Beckwith ring expansion/C-C bond formation cascade is described. A range of six to nine-membered β-alkenylated cyclic ketones possessing a quaternary carbon center were accessed under mild conditions. Besides styrenes, the electron-rich alkenes such as silyl enol ethers and enamides were also compatible, providing the desired β-alkylated cyclic ketones in moderate to good yields.
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Affiliation(s)
- Li Chen
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Li-Na Guo
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Shuai Liu
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Le Liu
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Xin-Hua Duan
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an Shaanxi 710049 China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University Lanzhou730000 P. R. China
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105
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Silva MS, Alves D, Hartwig D, Jacob RG, Perin G, Lenardão EJ. Selenium‐NMR Spectroscopy in Organic Synthesis: From Structural Characterization Toward New Investigations. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000582] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Márcio S. Silva
- LASOL – CCQFA Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Diego Alves
- LASOL – CCQFA Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Daniela Hartwig
- LASOL – CCQFA Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Raquel G. Jacob
- LASOL – CCQFA Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Gelson Perin
- LASOL – CCQFA Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
| | - Eder J. Lenardão
- LASOL – CCQFA Universidade Federal de Pelotas – UFPel – P.O. Box 354 – 96010-900 Pelotas, RS Brazil
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106
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Braconi E, Götzinger AC, Cramer N. Enantioselective Iron-Catalyzed Cross-[4+4]-Cycloaddition of 1,3-Dienes Provides Chiral Cyclooctadienes. J Am Chem Soc 2020; 142:19819-19824. [PMID: 33175501 DOI: 10.1021/jacs.0c09486] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Chiral cyclooctadienes are a frequently occurring scaffold in natural products and specialty chemicals, and are used as ligands in asymmetric catalysis. Accessing substituted cyclooctadienes in an efficient asymmetric fashion has been notoriously challenging. We report an iron-catalyzed enantioselective cross-[4+4]-cycloaddition of 1,3-dienes to form substituted cyclooctadienes under very mild conditions. A highly tailored chiral α-diimine iron complex is key for the success of the transformation providing a balanced performance between reactivity, excellent cross-selectivity and very high enantioselectivity. Steric maps of the complexes help accounting for the observed selectivity. The developed method allows rapid and atom-economic access to novel differently functionalized cyclooctadienes in very high yields and enantioselectivities.
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Affiliation(s)
- Elena Braconi
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Alissa C Götzinger
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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107
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Uno H, Kawai K, Shiro M, Shibata N. Modular Synthesis of Medium-Sized Fluorinated and Nonfluorinated Heterocyclic Lactones by Sequential CN-Bond-Cleaving Ring Expansion under Pd Catalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03927] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hiroto Uno
- Department of Nanopharmaceutical Sciences & Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Koki Kawai
- Department of Nanopharmaceutical Sciences & Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Motoo Shiro
- Rigaku Corporation, 3-9-12, Matsubara-cho, Akishima-shi, Tokyo 196-8666, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences & Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku, Nagoya 466-8555, Japan
- Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, 688 Yingbin Avenue, 321004 Jinhua, China
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108
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Affiliation(s)
- Ronald L. Reyes
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Tomohiro Iwai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Masaya Sawamura
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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109
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Lawer A, Epton RG, Stephens TC, Palate KY, Lodi M, Marotte E, Lamb KJ, Sangha JK, Lynam JM, Unsworth WP. Evaluating the Viability of Successive Ring-Expansions Based on Amino Acid and Hydroxyacid Side-Chain Insertion. Chemistry 2020; 26:12674-12683. [PMID: 32432817 PMCID: PMC7589337 DOI: 10.1002/chem.202002164] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Indexed: 01/20/2023]
Abstract
The outcome of ring-expansion reactions based on amino/hydroxyacid side-chain insertion is strongly dependent on ring size. This manuscript, which builds upon our previous work on Successive Ring Expansion (SuRE) methods, details efforts to better define the scope and limitations of these reactions on lactam and β-ketoester ring systems with respect to ring size and additional functionality. The synthetic results provide clear guidelines as to which substrate classes are more likely to be successful and are supported by computational results, using a density functional theory (DFT) approach. Calculating the relative Gibbs free energies of the three isomeric species that are formed reversibly during ring expansion enables the viability of new synthetic reactions to be correctly predicted in most cases. The new synthetic and computational results are expected to support the design of new lactam- and β-ketoester-based ring-expansion reactions.
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Affiliation(s)
- Aggie Lawer
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | - Ryan G. Epton
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | | | | | - Mahendar Lodi
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | - Emilie Marotte
- ENSICAEN6 Boulevard Maréchal Juin, CS 4505314050Caen Cedex 04France
| | - Katie J. Lamb
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
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110
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Mittendorf F, Mohr F, Kirsch SF. Ring Expansion of 2-Azido-2-phenyl-indan-1,3-dione for the Generation of Heterocyclic Scaffolds. J Org Chem 2020; 85:12760-12769. [DOI: 10.1021/acs.joc.0c01586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fabia Mittendorf
- Organic Chemistry, Bergische Universität Wuppertal, 42119 Wuppertal, Germany
| | - Fabian Mohr
- Inorganic Chemistry, Bergische Universität Wuppertal, 42119 Wuppertal, Germany
| | - Stefan F. Kirsch
- Organic Chemistry, Bergische Universität Wuppertal, 42119 Wuppertal, Germany
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111
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Srinivasulu V, Schilf P, Ibrahim S, Shehadi IA, Malik OG, Sieburth S, Khanfar MA, Hamad M, Abu-Yousef IA, Majdalawieh AF, Al-Tel TH. Divergent Strategy for Diastereocontrolled Synthesis of Small- and Medium-Ring Architectures. J Org Chem 2020; 85:10695-10708. [PMID: 32806094 DOI: 10.1021/acs.joc.0c01244] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nitrogen and oxygen medium rings, in particular nine-membered rings, epitomize a unique area of chemical space that occurs in many natural products and biologically appealing compounds. The scarcity of 8- to 12-membered rings among clinically approved drugs is indicative of the difficulties associated with their synthesis, principally owing to the unfavorable entropy and transannular strain. We report here a scandium triflate-catalyzed reaction that allows for a modular access to a diverse collection of nine-membered ring heterocycles in a one-pot cascade and with complete diastereocontrol. This cascade features an intramolecular addition of an acyl group-derived enol to a α,β-unsaturated carbonyl moiety, leading to N- and O-derived medium-ring systems. Computational studies using the density functional theory support the proposed mechanism. Additionally, a one-pot cascade leading to hexacyclic chromeno[3',4':2,3]indolizino[8,7-b]indole architectures, with six fused rings and four contiguous chiral centers, is reported. This novel cascade features many concerted events, including the formation of two azomethine ylides, [3 + 2]-cycloaddition, 1,3-sigmatropic rearrangement, Michael addition, and Pictet-Spengler reaction among others. Phenotypic screening of the resulting oxazonine collection identified chemical probes that regulate mitochondrial membrane potential, adenosine 5'-triphosphate contents, and reactive oxygen species levels in hepatoma cells (Hepa1-6), a promising approach for targeting cancer and metabolic disorders.
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Affiliation(s)
- Vunnam Srinivasulu
- Sharjah Institute for Medical Research, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Paul Schilf
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Ratzeburger Allee 160, Lübeck 23538, Germany
| | - Saleh Ibrahim
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Ratzeburger Allee 160, Lübeck 23538, Germany
| | - Ihsan A Shehadi
- College of Science, Department of Chemistry, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Omar G Malik
- College of Science, Department of Chemistry, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Scott Sieburth
- Department of Chemistry, Temple University, 201 Beury Hall, Philadelphia, Pennsylvania 19122, United States
| | - Monther A Khanfar
- College of Science, Department of Chemistry, University of Sharjah, P.O. Box 27272, Sharjah, UAE.,Department of Chemistry, University of Jordan, Amman 11942, Jordan
| | - Mohamad Hamad
- College of Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Imad A Abu-Yousef
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, UAE
| | - Amin F Majdalawieh
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, UAE
| | - Taleb H Al-Tel
- Sharjah Institute for Medical Research, University of Sharjah, P.O. Box 27272, Sharjah, UAE
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112
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Grintsevich S, Sapegin A, Reutskaya E, Peintner S, Erdélyi M, Krasavin M. An Alternative Approach to the Hydrated Imidazoline Ring Expansion (HIRE) of Diarene‐Fused [1.4]Oxazepines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000789] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sergey Grintsevich
- Institute of Chemistry Saint Petersburg State University 199034 Saint Petersburg Russia
| | - Alexander Sapegin
- Institute of Chemistry Saint Petersburg State University 199034 Saint Petersburg Russia
| | - Elena Reutskaya
- Institute of Chemistry Saint Petersburg State University 199034 Saint Petersburg Russia
| | - Stefan Peintner
- Department of Chemistry BMC Uppsala University 751 23 Uppsala Sweden
| | - Máté Erdélyi
- Department of Chemistry BMC Uppsala University 751 23 Uppsala Sweden
| | - Mikhail Krasavin
- Institute of Chemistry Saint Petersburg State University 199034 Saint Petersburg Russia
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113
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Rossi-Ashton JA, Clarke AK, Unsworth WP, Taylor RJK. Phosphoranyl Radical Fragmentation Reactions Driven by Photoredox Catalysis. ACS Catal 2020; 10:7250-7261. [PMID: 32905246 PMCID: PMC7469205 DOI: 10.1021/acscatal.0c01923] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/04/2020] [Indexed: 12/17/2022]
Abstract
Photocatalytic generation of phosphoranyl radicals is fast emerging as an essential method for the generation of diverse and valuable radicals, typically via deoxygenation or desulfurization processes. This Perspective is a comprehensive evaluation of all studies using phosphoranyl radicals as tunable mediators in photoredox catalysis, highlighting how two distinct methods for phosphoranyl radical formation (radical addition and nucleophilic addition) can be used to generate versatile radical intermediates with diverse reactivity profiles.
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Affiliation(s)
| | - Aimee K. Clarke
- Department of Chemistry, University of York, Heslington,
York YO10 5DD, U.K.
| | - William P. Unsworth
- Department of Chemistry, University of York, Heslington,
York YO10 5DD, U.K.
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