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Cao Z, Sun W, Zhang J, Zhuo J, Yang S, Song X, Ma Y, Lu P, Han T, Li C. Total syntheses of (-)-macrocalyxoformins A and B and (-)-ludongnin C. Nat Commun 2024; 15:6052. [PMID: 39025872 PMCID: PMC11258297 DOI: 10.1038/s41467-024-50374-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Accepted: 07/09/2024] [Indexed: 07/20/2024] Open
Abstract
The complex and diverse molecular architectures along with broad biological activities of ent-kauranoids natural products make them an excellent testing ground for the invention of synthetic methods and strategies. Recent efforts notwithstanding, synthetic access to the highly oxidized enmein-type ent-kauranoids still presents considerable challenges to synthetic chemists. Here, we report the enantioselective total syntheses of C-19 oxygenated enmein-type ent-kauranoids, including (-)-macrocalyxoformins A and B and (-)-ludongnin C, along with discussion and study of synthetic strategies. The enabling feature in our synthesis is a devised Ni-catalyzed decarboxylative cyclization/radical-polar crossover/C-acylation cascade that forges a THF ring concomitantly with the β-keto ester group. Mechanistic studies reveal that the C-acylation process in this cascade reaction is achieved through a carboxylation followed by an in situ esterification. Biological evaluation of these synthetic natural products reveals the indispensable role of the ketone on the D ring in their anti-tumor efficacy.
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Affiliation(s)
- Zichen Cao
- School of Life Sciences, Peking University, 100871, Beijing, China
- National Institute of Biological Sciences, 102206, Beijing, China
| | - Wenxuan Sun
- National Institute of Biological Sciences, 102206, Beijing, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, 100084, Beijing, China
| | - Jingfu Zhang
- National Institute of Biological Sciences, 102206, Beijing, China
| | - Junming Zhuo
- National Institute of Biological Sciences, 102206, Beijing, China
| | - Shaoqiang Yang
- National Institute of Biological Sciences, 102206, Beijing, China
| | - Xiaocui Song
- National Institute of Biological Sciences, 102206, Beijing, China
| | - Yan Ma
- National Institute of Biological Sciences, 102206, Beijing, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, 100084, Beijing, China
| | - Panrui Lu
- National Institute of Biological Sciences, 102206, Beijing, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, 100084, Beijing, China
| | - Ting Han
- National Institute of Biological Sciences, 102206, Beijing, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, 100084, Beijing, China
| | - Chao Li
- National Institute of Biological Sciences, 102206, Beijing, China.
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, 100084, Beijing, China.
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2
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Li R, Yin S, Xie L, Li X, Jia J, Zhao L, He CY. Catalyst-free decarboxylative cross-coupling of N-hydroxyphthalimide esters with tert-butyl 2-(trifluoromethyl)acrylate and its application. Org Biomol Chem 2024; 22:2279-2283. [PMID: 38407278 DOI: 10.1039/d3ob02103c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Here, we demonstrate a practical method toward the facile synthesis of CF3-containing amino acids through visible light promoted decarboxylative cross-coupling of a redox-active ester with tert-butyl 2-(trifluoromethyl)acrylate. The reaction was driven by the photochemical activity of electron donor-acceptor (EDA) complexes that were formed by the non-covalent interaction between a Hantzsch ester and a redox-active ester. The advantages of this protocol are its synthetic simplicity, rich functional group tolerance, and a cost-effective reaction system.
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Affiliation(s)
- Rui Li
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Susu Yin
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Lang Xie
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Xuefei Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Jia Jia
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Liang Zhao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Chun-Yang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
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3
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Teye-Kau JHG, Ayodele MJ, Pitre SP. Vitamin B 12 -Photocatalyzed Cyclopropanation of Electron-Deficient Alkenes Using Dichloromethane as the Methylene Source. Angew Chem Int Ed Engl 2024; 63:e202316064. [PMID: 38015966 DOI: 10.1002/anie.202316064] [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: 10/23/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 11/30/2023]
Abstract
The cyclopropyl group is of great importance in medicinal chemistry, as it can be leveraged to influence a range of pharmaceutical properties in drug molecules. This report describes a Vitamin B12 -photocatalyzed approach for the cyclopropanation of electron-deficient alkenes using dichloromethane (CH2 Cl2 ) as the methylene source. The reaction proceeds in good to excellent yields under mild conditions, has excellent functional group compatibility, and is highly chemoselective. The scope could also be extended to the preparation of D2 -cyclopropyl and methyl-substituted cyclopropyl adducts starting from CD2 Cl2 and 1,1-dichloroethane, respectively.
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Affiliation(s)
- John Hayford G Teye-Kau
- Department of Chemistry, Oklahoma State University, 107 Physical Sciences, Stillwater, OK 74078, USA
| | - Mayokun J Ayodele
- Weaver Labs LLC, 1110 S. Innovation Way Dr., #130, Stillwater, OK 74074, USA
| | - Spencer P Pitre
- Department of Chemistry, Oklahoma State University, 107 Physical Sciences, Stillwater, OK 74078, USA
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4
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Sharique M, Matsuo B, Granados A, Kim S, Arshad M, Oh H, Wu VE, Huang M, Csakai A, Marcaurelle LA, Molander GA. On-DNA hydroalkylation of N-vinyl heterocycles via photoinduced EDA-complex activation. Chem Sci 2023; 14:14193-14199. [PMID: 38098729 PMCID: PMC10717525 DOI: 10.1039/d3sc03731b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 08/22/2023] [Indexed: 12/17/2023] Open
Abstract
The emergence of DNA-encoded library (DEL) technology has provided a considerable advantage to the pharmaceutical industry in the pursuit of discovering novel therapeutic candidates for their drug development initiatives. This combinatorial technique not only offers a more economical, spatially efficient, and time-saving alternative to the existing ligand discovery methods, but also enables the exploration of additional chemical space by utilizing novel DNA-compatible synthetic transformations to leverage multifunctional building blocks from readily available substructures. In this report, a decarboxylative-based hydroalkylation of DNA-conjugated N-vinyl heterocycles enabled by single-electron transfer (SET) and subsequent hydrogen atom transfer through electron-donor/electron-acceptor (EDA) complex activation is detailed. The simplicity and robustness of this method permits inclusion of a broad array of alkyl radical precursors and DNA-tethered nitrogenous heterocyles to generate medicinally relevant substituted heterocycles with pendant functional groups. Moreover, a successful telescoped route provides the opportunity to access a broad range of intricate structural scaffolds by employing basic carboxylic acid feedstocks.
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Affiliation(s)
- Mohammed Sharique
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Bianca Matsuo
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Albert Granados
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Saegun Kim
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Mahwish Arshad
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Hyunjung Oh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Victoria E Wu
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GSK 200 Cambridge Park Drive Cambridge MA 02140 USA
| | - Minxue Huang
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GSK 200 Cambridge Park Drive Cambridge MA 02140 USA
| | - Adam Csakai
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GSK 200 Cambridge Park Drive Cambridge MA 02140 USA
| | - Lisa A Marcaurelle
- Encoded Library Technologies/NCE Molecular Discovery, R&D Medicinal Science and Technology, GSK 200 Cambridge Park Drive Cambridge MA 02140 USA
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
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5
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Kiprova N, Desnoyers M, Narobe R, Klufts-Edel A, Chaud J, König B, Compain P, Kern N. Towards a General Access to 1-Azaspirocyclic Systems via Photoinduced, Reductive Decarboxylative Radical Cyclizations. Chemistry 2023:e202303841. [PMID: 38084823 DOI: 10.1002/chem.202303841] [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: 11/18/2023] [Indexed: 01/13/2024]
Abstract
A convenient and versatile approach to important 1-azaspirocyclic systems relevant to medicinal chemistry and natural products is reported herein. The main strategy relies on a reductive decarboxylative cyclization of redox-active esters which can be rapidly assembled from abundant cyclic azaacids and tailored acceptor sidechains, with a focus on alkyne acceptors enabling the generation of useful exo-alkene moieties. Diastereoconvergent variants were studied and could be achieved either through remote stereocontrol or conformational restriction in bicyclic carbamate substrates. Two sets of metal-free photocatalytic conditions employing inexpensive eosin Y were disclosed and studied experimentally to highlight key mechanistic divergences.
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Affiliation(s)
- Natalia Kiprova
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Marine Desnoyers
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Rok Narobe
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, Germany
| | - Arthur Klufts-Edel
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Juliane Chaud
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, Germany
| | - Philippe Compain
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
| | - Nicolas Kern
- Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR 7042, Université de Strasbourg/Université de Haute-Alsace/CNRS, ECPM, 25 rue Becquerel, 67087 Strasbourg, France
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6
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Zeng LY, Qu PZ, Tao M, Pu G, Jia J, Wang P, Shang M, Li X, He CY. Synthesis of Alkylated Polyfluorobenzenes through Decarboxylative Giese Addition of Aliphatic N-Hydroxyphthalimide Esters with Polyfluorostyrene. J Org Chem 2023; 88:14105-14114. [PMID: 37708081 DOI: 10.1021/acs.joc.3c01672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Polyfluoroaromatic compounds play crucial roles in medicinal and material science. However, the synthesis of alkylated polyfluoroarenes has been relatively underdeveloped. In this study, we devised a novel decarboxylative coupling reaction between aliphatic N-hydroxyphthalimide esters and polyfluorostyrene, leveraging the photochemical activity of electron donor-acceptor (EDA) complexes. This method offers simple reaction conditions, a broad substrate scope, and excellent functional group tolerance. Furthermore, we have demonstrated the practicality of this protocol through late-stage polyfluoroaryl modification of biologically active molecules using readily available carboxylic acids as starting materials, thus providing an important supplement to the current toolbox for accessing alkylated polyfluoroaryl motifs.
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Affiliation(s)
- Lin-Yuan Zeng
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Pei-Zhen Qu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Maoling Tao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Guoliang Pu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Jia Jia
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Pan Wang
- Department of Nuclear Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Maocai Shang
- Department of Nuclear Medicine, Affiliated Hospital of Zunyi Medical University, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
| | - Xuefei Li
- Central Research Institute, United-Imaging Healthcare Group Co., Ltd, Shanghai 201807, P.R. China
| | - Chun-Yang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P.R. China
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7
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More DA, Shirsath SR, Muthukrishnan M. Metal- and Photocatalyst-Free, Visible-Light-Initiated C3 α-Aminomethylation of Quinoxalin-2(1 H)-ones via Electron Donor-Acceptor Complexes. J Org Chem 2023; 88:13339-13350. [PMID: 37651188 DOI: 10.1021/acs.joc.3c01249] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
We report a metal- and photocatalyst-free C3 α-aminomethylation of quinoxalin-2(1H)-ones with N-alkyl-N-methylanilines. The reaction proceeds through the formation of a photoactivated electron donor-acceptor complex between quinoxalin-2(1H)-ones and N-alkyl-N-methylanilines. The present method provides a mild and environmentally friendly protocol that exhibits good atom economy and excellent functional group tolerance to obtain a library of biologically significant C3 α-aminomethylated quinoxalin-2(1H)-ones in good yields.
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Affiliation(s)
- Devidas A More
- CSIR-National Chemical Laboratory, Division of Organic Chemistry, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sachin R Shirsath
- CSIR-National Chemical Laboratory, Division of Organic Chemistry, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - M Muthukrishnan
- CSIR-National Chemical Laboratory, Division of Organic Chemistry, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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8
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Han S, Samony KL, Nabi RN, Bache CA, Kim DK. Hydrotrifluoroacetylation of Alkenes via Designer Masked Acyl Reagents. J Am Chem Soc 2023; 145:11530-11536. [PMID: 37192402 DOI: 10.1021/jacs.3c04294] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Because of its impressive ability to promote pharmaceutical activity, the introduction of trifluoromethylacyl (CF3CO) functionality into organic compounds has become an important and growing research area. Although various protocols have been developed to access trifluoroketones, the use of trifluoroacetyl radicals remains virtually undeveloped. Herein, we disclose a novel method for trifluoroacetylation through an umpolung reagent, thereby transforming an electrophilic radical into a nucleophilic radical. The applicability of this transformation is highlighted by large-scale, late-stage reactions of complex bioactive molecules sclareolide and loratadine. Furthermore, the direct transformation of trifluoromethyl ketones into various fluorinated analogues illustrates the potential synthetic application of our developed method.
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Affiliation(s)
- Sangil Han
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Kyra L Samony
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Rifat N Nabi
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Campbell A Bache
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Daniel K Kim
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
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9
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Brewster JT, Randall SD, Kowalski J, Cruz C, Shoemaker R, Tarlton E, Hinklin RJ. A Decarboxylative Cross-Coupling Platform To Access 2-Heteroaryl Azetidines: Building Blocks with Application in Medicinal Chemistry. Org Lett 2022; 24:9123-9129. [DOI: 10.1021/acs.orglett.2c03852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- James T. Brewster
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Samuel D. Randall
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - John Kowalski
- Drug Metabolism & Pharmacokinetics, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Cole Cruz
- Medicinal Chemistry Synthesis Development, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder Colorado 80301, United States
| | - Richard Shoemaker
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Eugene Tarlton
- Medicinal Chemistry Synthesis Development, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder Colorado 80301, United States
| | - Ronald J. Hinklin
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
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10
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Zhou Z, Sales ZS, Pippel DJ, Qian M, Martin CL. Blue Light-Mediated, Photocatalyst-Free Decarboxylative Alkylation of Heteroaryl Sulfinimines. J Org Chem 2022; 87:14948-14952. [PMID: 36228170 DOI: 10.1021/acs.joc.2c01861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a diastereoselective, photocatalyst-free decarboxylative alkylation of (hetero)aryl sulfinimines using redox-active esters under blue light. High yields and diastereoselectivities can be achieved under mild conditions, and we demonstrate its utility as a synthetic method, especially for medicinal chemists.
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Affiliation(s)
- Zhe Zhou
- Discovery Process Research, Janssen Research & Development LLC, 3210 Merryfield Row, San Diego, California 92121, United States
| | - Zachary S Sales
- Discovery Process Research, Janssen Research & Development LLC, 3210 Merryfield Row, San Diego, California 92121, United States
| | - Daniel J Pippel
- Discovery Process Research, Janssen Research & Development LLC, 3210 Merryfield Row, San Diego, California 92121, United States
| | - Michael Qian
- Discovery Chemistry, Janssen Research & Development LLC, 3210 Merryfield Row, San Diego, California 92121, United States
| | - Connor L Martin
- Discovery Process Research, Janssen Research & Development LLC, 3210 Merryfield Row, San Diego, California 92121, United States
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11
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Tsutsui Y, Tanaka D, Manabe Y, Ikinaga Y, Yano K, Fukase K, Konishi A, Yasuda M. Synthesis of Cage‐Shaped Borates Bearing Pyrenylmethyl Groups: Efficient Lewis Acid Catalyst for Photoactivated Glycosylations Driven by Intramolecular Excimer Formation. Chemistry 2022; 28:e202202284. [DOI: 10.1002/chem.202202284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Yuya Tsutsui
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Daiki Tanaka
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Yoshiyuki Manabe
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
- Forefront Research Center Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Yuka Ikinaga
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Kumpei Yano
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Koichi Fukase
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
- Forefront Research Center Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Akihito Konishi
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI) Osaka University Suita Osaka 565-0871 Japan
- Center for Atomic and Molecular Technologies Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Makoto Yasuda
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI) Osaka University Suita Osaka 565-0871 Japan
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12
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Yedase GS, Venugopal S, Arya P, Yatham VR. Catalyst‐free Hantzsch ester‐mediated Organic Transformations Driven by Visible light. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Girish Suresh Yedase
- IISER-TVM: Indian Institute of Science Education Research Thiruvananthapuram School of Chemistry INDIA
| | - Sreelakshmi Venugopal
- IISER-TVM: Indian Institute of Science Education Research Thiruvananthapuram School of Chemistry INDIA
| | - P Arya
- IISER-TVM: Indian Institute of Science Education Research Thiruvananthapuram School of Chemistry INDIA
| | - Veera Reddy Yatham
- IISER-TVM: Indian Institute of Science Education Research Thiruvananthapuram School of Chemistry Thiruvananthapuram 695551 Thiruvananthapuram INDIA
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13
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Xi D, Lu C, Jing D, Zheng K. Carbothiolation of Styrenes by Visible‐Light‐Induced Thiyl Radicals: C3‐Functionalization of Benzofuran‐2(3H)‐ones. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dailin Xi
- Sichuan University Chemistry 610064 Chengdu CHINA
| | - Cong Lu
- Sichuan University Chemistry 610064 Chengdu CHINA
| | - Dong Jing
- Sichuan University Chemistry 610064 Chengdu CHINA
| | - Ke Zheng
- Sichuan University College of Chemistry wangjiang road 29# 610064 chengdu CHINA
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14
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Utilization of photocatalysts in decarboxylative coupling of carboxylic N-hydroxyphthalimide (NHPI) esters. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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15
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Guo P, Tao M, Xu WW, Wang AJ, Li W, Yao Q, Tong J, He CY. Synthesis of Secondary Trifluoromethylated Alkyl Bromides Using 2-Bromo-3,3,3-trifluoropropene as a Radical Acceptor. Org Lett 2022; 24:2143-2148. [PMID: 35274952 DOI: 10.1021/acs.orglett.2c00425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Herein, the first example using commercially available 2-bromo-3,3,3-trifluoropropene (BTP) as a radical acceptor has been reported. Taking advantage of this strategy, a wide range of secondary trifluoromethylated alkyl bromides were synthesized in good to excellent yields with broad functional group tolerance by using redox-active esters as a radical precursor. The practicality of this protocol was further demonstrated by diverse derivations and direct modification of biologically active molecules.
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Affiliation(s)
- Peng Guo
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Maoling Tao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Wen-Wen Xu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - An-Jun Wang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Weipiao Li
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Qiuli Yao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou 563000,P. R. China
| | - Jie Tong
- School of Medicine, Yale University, New Haven, Connecticut 06510, United States
| | - Chun-Yang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou 563000,P. R. China
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16
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Li J, Siang Tan S, Kyne SH, Wai Hong Chan P. Minisci‐Type Alkylation of
N
‐Heteroarenes by
N
‐(Acyloxy)phthalimide Esters Mediated by a Hantzsch Ester and Blue LED Light. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101195] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiacheng Li
- School of Chemistry Monash University Clayton Victoria 3800 Australia
| | - Suan Siang Tan
- School of Chemistry Monash University Clayton Victoria 3800 Australia
| | - Sara Helen Kyne
- School of Chemistry Monash University Clayton Victoria 3800 Australia
| | - Philip Wai Hong Chan
- Department of Biological Environment Jiyang College of Zhejiang A&F University Hang Zhou Shi, Zhuji 311800, People's Republic of China
- School of Chemistry Monash University Clayton Victoria 3800 Australia
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17
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Kim JY, Lee YS, Ryu DH. Ternary Electron Donor–Acceptor Complex Enabled Enantioselective Radical Additions to α, β-Unsaturated Carbonyl Compounds. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04835] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jae Yeon Kim
- Department of Chemistry, Sungkyunkwan University, Cheoncheon, Jangan, Suwon 16419, Korea
| | - Yea Suel Lee
- Department of Chemistry, Sungkyunkwan University, Cheoncheon, Jangan, Suwon 16419, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, Cheoncheon, Jangan, Suwon 16419, Korea
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18
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Hirose A, Watanabe A, Ogino K, Nagatomo M, Inoue M. Unified Total Syntheses of Rhamnofolane, Tigliane, and Daphnane Diterpenoids. J Am Chem Soc 2021; 143:12387-12396. [PMID: 34319739 DOI: 10.1021/jacs.1c06450] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Rhamnofolane, tigliane, and daphnane diterpenoids are structurally complex natural products with multiple oxygen functionalities, making them synthetically challenging. While these diterpenoids share a 5/7/6-trans-fused ring system (ABC-ring), the three-carbon substitutions at the C13- and C14-positions on the C-ring and appending oxygen functional groups differ among them, accounting for the disparate biological activities of these natural products. Here, we developed a new, unified strategy for expeditious total syntheses of five representative members of these three families, crotophorbolone (1), langduin A (2), prostratin (3), resiniferatoxin (4), and tinyatoxin (5). Retrosynthetically, 1-5 were simplified into their common ABC-ring 6 by detaching the three-carbon units and the oxygen-appended groups. Intermediate 6 with six stereocenters was assembled from four achiral fragments in 12 steps by integrating three powerful transformations, as follows: (i) asymmetric Diels-Alder reaction to induce formation of the C-ring; (ii) π-allyl Stille coupling reaction to set the trisubstituted E-olefin of the B-ring; and (iii) Eu(fod)3-promoted 7-endo cyclization of the B-ring via the generation of a bridgehead radical. Then 6 was diversified into 1-5 by selective installation of the different functional groups. Attachment of the C14-β-isopropenyl and isopropyl groups led to 1 and 2, respectively, while oxidative acetoxylation and C13,14-β-dimethylcyclopropane formation gave rise to 3. Finally, formation of an α-oriented caged orthoester by C13-stereochemical inversion and esterification with two different homovanillic acids delivered 4 and 5 with a C13-β-isopropenyl group. This unified synthetic route to 1-5 required only 16-20 total steps, demonstrating the exceptional efficiency of the present strategy.
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Affiliation(s)
- Akira Hirose
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ayumu Watanabe
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kohei Ogino
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masanori Nagatomo
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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19
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Lipp A, Badir SO, Dykstra R, Gutierrez O, Molander GA. Catalyst-Free Decarbonylative Trifluoromethylthiolation Enabled by Electron Donor-Acceptor Complex Photoactivation. Adv Synth Catal 2021; 363:3507-3520. [PMID: 35273472 PMCID: PMC8903066 DOI: 10.1002/adsc.202100469] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Indexed: 08/06/2023]
Abstract
A catalyst- and additive-free decarbonylative trifluoromethylthiolation of aldehyde feedstocks has been developed. This operationally simple, scalable, and open-to-air transformation is driven by the selective photoexcitation of electron donor-acceptor (EDA) complexes, stemming from the association of 1,4-dihydropyridines (donor) with N-(trifluoromethylthio)phthalimide (acceptor), to trigger intermolecular single-electron transfer events under ambient- and visible light-promoted conditions. Extension to other electron acceptors enables the synthesis of thiocyanates and thioesters, as well as the difunctionalization of [1.1.1] propellane. The mechanistic intricacies of this photochemical paradigm are elucidated through a combination of experimental efforts and high-level quantum mechanical calculations [dispersion-corrected (U)DFT, DLPNO-CCSD(T), and TD-DFT]. This comprehensive study highlights the necessity for EDA complexation for efficient alkyl radical generation. Computation of subsequent ground state pathways reveals that SH2 addition of the alkyl radical to the intermediate radical EDA complex is extremely exergonic and results in a charge transfer event from the dihydropyridine donor to the N-(trifluoromethylthio)phthalimide acceptor of the EDA complex. Experimental and computational results further suggest that product formation also occurs via SH2 reaction of alkyl radicals with 1,2-bis(trifluoromethyl)disulfane, generated in-situ through combination of thiyl radicals.
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Affiliation(s)
- Alexander Lipp
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Shorouk O Badir
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Ryan Dykstra
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Osvaldo Gutierrez
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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20
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Cabrera-Afonso MJ, Sookezian A, Badir SO, El Khatib M, Molander GA. Photoinduced 1,2-dicarbofunctionalization of alkenes with organotrifluoroborate nucleophiles via radical/polar crossover. Chem Sci 2021; 12:9189-9195. [PMID: 34276949 PMCID: PMC8261722 DOI: 10.1039/d1sc02547c] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 06/06/2021] [Indexed: 01/08/2023] Open
Abstract
Alkene 1,2-dicarbofunctionalizations are highly sought-after transformations as they enable a rapid increase of molecular complexity in one synthetic step. Traditionally, these conjunctive couplings proceed through the intermediacy of alkylmetal species susceptible to deleterious pathways including β-hydride elimination and protodemetalation. Herein, an intermolecular 1,2-dicarbofunctionalization using alkyl N-(acyloxy)phthalimide redox-active esters as radical progenitors and organotrifluoroborates as carbon-centered nucleophiles is reported. This redox-neutral, multicomponent reaction is postulated to proceed through photochemical radical/polar crossover to afford a key carbocation species that undergoes subsequent trapping with organoboron nucleophiles to accomplish the carboallylation, carboalkenylation, carboalkynylation, and carboarylation of alkenes with regio- and chemoselective control. The mechanistic intricacies of this difunctionalization were elucidated through Stern-Volmer quenching studies, photochemical quantum yield measurements, and trapping experiments of radical and ionic intermediates.
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Affiliation(s)
- María Jesús Cabrera-Afonso
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Anasheh Sookezian
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Shorouk O Badir
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Mirna El Khatib
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania Stellar-Chance Building, 422 Curie Boulevard Philadelphia Pennsylvania 19104-6059 USA
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
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21
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Polites VC, Badir SO, Keess S, Jolit A, Molander GA. Nickel-Catalyzed Decarboxylative Cross-Coupling of Bicyclo[1.1.1]pentyl Radicals Enabled by Electron Donor-Acceptor Complex Photoactivation. Org Lett 2021; 23:4828-4833. [PMID: 34100624 DOI: 10.1021/acs.orglett.1c01558] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The use of bicyclo[1.1.1]pentanes (BCPs) as para-disubstituted aryl bioisosteres has gained considerable momentum in drug development programs. Carbon-carbon bond formation via transition-metal-mediated cross-coupling represents an attractive strategy to generate BCP-aryl compounds for late-stage functionalization, but these typically require reactive organometallics to prepare BCP nucleophiles on demand from [1.1.1]propellane. In this study, the synthesis and Ni-catalyzed functionalization of BCP redox-active esters with (hetero)aryl bromides via the action of a photoactive electron donor-acceptor complex are reported.
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Affiliation(s)
- Viktor C Polites
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Shorouk O Badir
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Sebastian Keess
- Medicinal Chemistry Department, Neuroscience Discovery Research, AbbVie Deutschland GmbH & Co. KG, Knollstraße, 67061 Ludwigshafen, Germany
| | - Anais Jolit
- Medicinal Chemistry Department, Neuroscience Discovery Research, AbbVie Deutschland GmbH & Co. KG, Knollstraße, 67061 Ludwigshafen, Germany
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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22
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Liu C, Shen N, Shang R. Photocatalytic decarboxylative alkylation of silyl enol ether and enamide with N-(acyloxy)phthalimide using ammonium iodide. Org Chem Front 2021. [DOI: 10.1039/d1qo00648g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Under visible light, a catalytic amount of ammonium iodide promotes the decarboxylative alkylation of silyl enol ether and enamide with aliphatic N-(acyloxy)phthalimide through the photoactivation of a transiently assembled chromophore.
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Affiliation(s)
- Can Liu
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Ni Shen
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Rui Shang
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
- Department of Chemistry
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23
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Shao Z, Zhou Q, Wang J, Tang R, Shen Y. Sodium Iodide-Triphenylphosphine-Mediated Photoredox Alkylation of Aldimines. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202102039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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