1
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Xu J, Liu BX, Liu XY, Rao W, Wang SY. Light-Induced 1,3-Thiosulfonylation of β,γ-Unsaturated Ketones with Thiosulfonates. Org Lett 2024; 26:6798-6802. [PMID: 39109986 DOI: 10.1021/acs.orglett.4c01925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Sulfur-containing compounds exhibit potent significance in drug molecules. Thiosulfonates as 1,3-thiosulfonylation reactants to olefins have yet to be investigated. Herein, we report photoinduced 1,3-difunctionalization of β,γ-unsaturated ketones with thiosulfonates, which undergo a radical 1,2-acyl shift. The protocol features mild conditions, high regioselectivity, and 100% atom economy.
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Affiliation(s)
- Jiuwen Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Bo-Xi Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Xin-Yu Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Weidong Rao
- Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Shun-Yi Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
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2
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Liu R, Tian Y, Wang J, Wang Z, Li X, Zhao C, Yao R, Li S, Yuan L, Yang J, Shi D. Visible light-initiated radical 1,3-difunctionalization of β,γ-unsaturated ketones. SCIENCE ADVANCES 2022; 8:eabq8596. [PMID: 36490351 PMCID: PMC9733936 DOI: 10.1126/sciadv.abq8596] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
Radical-mediated 1,2-difunctionalization of olefins is a well-established synthetic technique widely used in the rapid construction of structurally diverse molecular entities. However, radical-mediated 1,3-difunctionalization reactions are rare, and the substrates are generally limited to strained skeletons. Here, we report a practical approach for 1,3-difunctionalization of available β,γ-unsaturated ketones via a radical cascade process including visible light-irradiated radical addition, thermodynamic stability-driven 1,2-carbonyl migration from unactivated all-carbon quaternary center, and terminal C-radical varied transformations. Various highly functionalized alkyl skeletons with different valuable functional groups at positions 1 and 3 and the carbonyl group at position 2 have been synthesized through a radical chain pathway or Cu-catalyzed Ritter-type reaction. Moreover, this protocol provides a real case of diversity-oriented radical rearrangement for drug discovery. We identified a previously unknown chemotype of dual inhibitors for hypoxia-inducible factor (HIF) and WNT signaling pathways from products. These small-molecule inhibitors could suppress HIF and WNT signaling-dependent HCT116 cell growth in 2D and 3D culture systems.
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Affiliation(s)
- Ruihua Liu
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Yang Tian
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Jie Wang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, Shandong, P. R. China
| | - Zemin Wang
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Xiangqian Li
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Chenyang Zhao
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, Shandong, P. R. China
| | - Ruoyu Yao
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Shuo Li
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Leifeng Yuan
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
| | - Jinbo Yang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, Shandong, P. R. China
| | - Dayong Shi
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, Shandong, P. R. China
- Laboratory of Marine Drugs and Biological Products, Pilot National Laboratory for Marine Science and Technology, 168 Weihai Road, Qingdao 266237, Shandong, P. R. China
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3
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Lübken D, Siekmeyer B, Kalesse M. Photochemical 1,3‐Acyl Shifts in Natural Product Synthesis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dennis Lübken
- Leibniz Universität Hannover: Leibniz Universitat Hannover Institut für Organische Chemie GERMANY
| | - Björn Siekmeyer
- Leibniz Universität Hannover: Leibniz Universitat Hannover Institute for Organic Chemistry Schneiderberg 1b 30167 Hannover GERMANY
| | - Markus Kalesse
- Leibniz Universität Hannover: Leibniz Universitat Hannover Organische Chemie Schneiderberg 1B 30167 Hannover GERMANY
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4
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Siekmeyer B, Lübken D, Bajerke K, Bernhardt B, Schreiner PR, Kalesse M. Total Synthesis of (-)-Antroalbocin A Enabled by a Strain Release-Controlled Photochemical 1,3-Acyl Shift. Org Lett 2022; 24:5812-5816. [PMID: 35912985 DOI: 10.1021/acs.orglett.2c02347] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first bioinspired, enantioselective, and protecting group free total synthesis of the antibacterial sesquiterpenoid (-)-antroalbocin A (1) has been achieved in 12 steps (5.4% overall yield) from dimedone. An organocatalytic Robinson annulation gave rapid access to the tricyclic enone (19) as starting material for the photochemical domino process of deconjugation and sigmatropic 1,3-acyl shift. Computational data of this process indicate that the 1,3-acyl shift benefits from the highly strained 1,3-enone 8. The transformation of 8 to its bridged isomer 5 is exergonic and, therefore, enables an increased conversion compared to unstrained substrates.
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Affiliation(s)
- Björn Siekmeyer
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany
| | - Dennis Lübken
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany
| | - Kevin Bajerke
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany
| | - Bastian Bernhardt
- Institute of Organic Chemistry, Justus Liebig University, 35392 Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, 35392 Giessen, Germany
| | - Markus Kalesse
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), 38124 Braunschweig, Germany
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5
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Saunthwal RK, Mortimer J, Orr-Ewing AJ, Clayden J. Enantioselective one-carbon expansion of aromatic rings by simultaneous formation and chromoselective irradiation of a transient coloured enolate. Chem Sci 2022; 13:2079-2085. [PMID: 35308841 PMCID: PMC8848985 DOI: 10.1039/d1sc06684f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/25/2022] [Indexed: 12/14/2022] Open
Abstract
Enantioenriched seven-membered carbocycles are motifs in many molecules of structural and biological interest. We report a simple, practical, transition metal-free and mechanistically unusual method for the enantioselective synthesis of substituted cycloheptatrienes. By forming a coloured enolate with an appropriate absorption band and selectively irradiating in situ, we to initiate a tandem, asymmetric anionic and photochemical ring expansion of readily accessible N-benzylbenzamides. The cascade of reactions leading to the products entails enantioselective benzylic deprotonation with a chiral lithium amide, dearomatizing cyclization of the resulting configurationally defined organolithium to give an extended amide enolate, and photochemically induced formal [1,7]-sigmatropic rearrangement and 6π-electrocyclic ring-opening - the latter all evidently being stereospecific - to deliver enantioenriched cycloheptatrienes with embedded benzylic stereocentres.
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Affiliation(s)
- Rakesh K Saunthwal
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - James Mortimer
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Andrew J Orr-Ewing
- 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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6
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Bargum MA, Krell-Jørgensen MP, Nielsen M, Qvortrup K, Laraia L. A photochemical microfluidic reactor for photosensitized [2+2] cycloadditions. Synlett 2022. [DOI: 10.1055/a-1771-4883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Here we report a microfluidic system for photochemical cycloadditions fabricated using silicon micro processing technologies. The system was optimized to yield residence times of just a few minutes for a range of photochemical [2+2]-cycloaddition reactions facilitated using high power UV-LEDs at 375 nm and triplet photosensitizers, which removed the need for the low wavelengths typically required for these types of transformations. Adducts using different excitable olefins with different linear-, carbocyclic- and heterocyclic coupling partners were explored to demonstrate the feasibility of performing photochemistry in microflow in an academic research environment. Finally, a reaction leading to a novel dihydrooxepin-2(3H)-one scaffold, and a mechanistic proposal for its formation are reported.
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Affiliation(s)
| | | | - Martin Nielsen
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Katrine Qvortrup
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Luca Laraia
- Department of Chemistry, Technical University of Denmark, Kgs. Lyngby, Denmark
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7
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Xiang ZN, Tong QL, Su JC, Hu ZF, Zhao N, Xia RF, Wu JL, Chen C, Chen JC, Wan LS. Diterpenoids with Rearranged 9(10→11)- abeo-10,12-Cyclojatrophane Skeleton and the First (15 S)-Jatrophane from Euphorbia helioscopia: Structural Elucidation, Biomimetic Conversion, and Their Immunosuppressive Effects. Org Lett 2022; 24:697-701. [PMID: 34965138 DOI: 10.1021/acs.orglett.1c04145] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Two novel diterpenoids, one with a rearranged trans,trans-fused tricyclo[10.3.0.04,6]pentadecane framework (1) and the other with an unprecedented 15S configuration (2), were isolated from Euphorbia helioscopia. Their structures were elucidated by extensive analysis of HR-ESI-MS, NMR, quantum-chemical calculation, and X-ray crystallographic data. Biosynthetically, 1 has a unique "cyclopropane-shift-like" biogenesis involving an oxa-di-π-methane (ODPM) rearrangement, which inspired us to accomplish the biomimetic conversion of 3 to 1. Moreover, compound 1 displayed a potent immunosuppressive effect by inhibiting Kv1.3 voltage-gated channels.
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Affiliation(s)
- Zhi-Nan Xiang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Qi-Lin Tong
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jun-Cheng Su
- State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, People's Republic of China
| | - Zhuo-Fan Hu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Ning Zhao
- Research Center of Ion Channelopathy, Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China
| | - Ru-Feng Xia
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jia-Le Wu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Chen Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jia-Chun Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Luo-Sheng Wan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Pharmacy Department of Tongji Medical School, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
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8
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Liu W, Hong B, Wang J, Lei X. New Strategies in the Efficient Total Syntheses of Polycyclic Natural Products. Acc Chem Res 2020; 53:2569-2586. [PMID: 33136373 DOI: 10.1021/acs.accounts.0c00531] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polycyclic natural products are an inexhaustible source of medicinal agents, and their complex molecular architecture renders challenging synthetic targets where innovative and effective approaches for their rapid construction are urgently required. The total synthesis of polycyclic natural products has witnessed exponential progression along with the emergence of new synthetic strategies and concepts, such as sequential C-H functionalizations, radical-based transformations, and functional group pairing strategies. Our group exerts continued interest in the construction of bioactive and structurally complex natural products as well as evaluation of the mode of action of these molecules. In this Account, we will showcase how these new synthetic strategies are employed and guide our total synthesis endeavors.During the last two decades, a series of remarkable advances in C-H functionalization have led to the emergence of many new approaches to directly functionalize C-H bonds into useful functional groups. These selective transformations have provided a great opportunity for the step- and atom-economical construction of key fragments in complex molecule synthesis. We recently furnished the total syntheses for polycyclic natural products: incarviatone A, chrysomycin A, polycarcin V, and gilvocarcin V by employing a multiple C-H bond functionalization strategy. The polysubstituted benzene or naphthalene skeleton was constructed through sequential and site-selective C-H functionalizations from readily available simple starting materials, which reduced the number of steps and streamlined synthesis.Recently, we have also completed the total syntheses for a number of skeletally diverse tetracyclic Isodon diterpenoids inspired by their biogenesis and radical-based retrosynthetic disconnections. Radical transformations are strategically and tactically utilized in our syntheses, and radical-based reactions, including organo-SOMO catalysis, Birch reduction, regioselective 1,6-dienyne reductive cyclization, visible-light-mediated Schenck ene reaction, and photoradical-mediated late-stage skeletal rearrangement, play significant roles in our synthetic endeavors. Protecting-group-free and scalable syntheses are also built into our work to achieve the "ideal" synthesis. Furthermore, our synthetic work reveals that late-stage skeletal rearrangement through a photo radical process is possible in a biological setting in complement with nature's carbocation chemistry in complex natural product biosynthesis.Lycopodium alkaloids are a large family of structurally unique polycyclic natural products with impressive biological activities. Owing to their fascinating polycyclic architectures and diverse biological activities, these alkaloids have continued to serve as targets as well as inspirations for the synthetic community for decades. To access these bioactive natural products or natural product-like molecules for biological exploration and drug discovery, we applied a novel functional group pairing strategy to furnish the total syntheses for several Lycopodium alkaloids and obtained numerous skeletally diverse compounds with structural complexity comparable to natural products.
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Affiliation(s)
- Weilong Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
| | - Benke Hong
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
| | - Jin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
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9
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Hong B, Luo T, Lei X. Late-Stage Diversification of Natural Products. ACS CENTRAL SCIENCE 2020; 6:622-635. [PMID: 32490181 PMCID: PMC7256965 DOI: 10.1021/acscentsci.9b00916] [Citation(s) in RCA: 158] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Indexed: 05/18/2023]
Abstract
Late-stage diversification of natural products is an efficient way to generate natural product derivatives for drug discovery and chemical biology. Benefiting from the development of site-selective synthetic methodologies, late-stage diversification of natural products has achieved notable success. This outlook will outline selected examples of novel methodologies for site-selective transformations of reactive functional groups and inert C-H bonds that enable late-stage diversification of complex natural products. Accordingly, late-stage diversification provides an opportunity to rapidly access various derivatives for modifying lead compounds, identifying cellular targets, probing protein-protein interactions, and elucidating natural product biosynthetic relationships.
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Affiliation(s)
- Benke Hong
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic
Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing 100871, China
- Department
of Chemical Biology, Peking University, Beijing 100871, China
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Synthetic
and Functional Biomolecules Center, Peking
University, Beijing 100871, China
- Peking-Tsinghua
Center for Life Sciences, Peking University, Beijing 100871, China
| | - Tuoping Luo
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic
Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing 100871, China
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Peking-Tsinghua
Center for Life Sciences, Peking University, Beijing 100871, China
- Academy
for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Xiaoguang Lei
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic
Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing 100871, China
- Department
of Chemical Biology, Peking University, Beijing 100871, China
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Synthetic
and Functional Biomolecules Center, Peking
University, Beijing 100871, China
- Peking-Tsinghua
Center for Life Sciences, Peking University, Beijing 100871, China
- E-mail:
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10
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Hong B, Liu W, Wang J, Wu J, Kadonaga Y, Cai PJ, Lou HX, Yu ZX, Li H, Lei X. Photoinduced Skeletal Rearrangements Reveal Radical-Mediated Synthesis of Terpenoids. Chem 2019. [DOI: 10.1016/j.chempr.2019.04.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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11
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Robb MA. In This Molecule There Must Be a Conical Intersection. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 2014. [DOI: 10.1016/b978-0-12-800256-8.00003-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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12
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Snyder JW, Mazziotti DA. Photoexcited conversion of gauche-1,3-butadiene to bicyclobutane via a conical intersection: Energies and reduced density matrices from the anti-Hermitian contracted Schrödinger equation. J Chem Phys 2011; 135:024107. [DOI: 10.1063/1.3606466] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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13
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Mori Y, Takano K. Reaction mechanism of di-π-methane rearrangement of 4-phenyl-4H-pyran: A CASSCF/MRMP2 study. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Nenov A, Cordes T, Herzog TT, Zinth W, de Vivie-Riedle R. Molecular Driving Forces for Z/E Isomerization Mediated by Heteroatoms: The Example Hemithioindigo. J Phys Chem A 2010; 114:13016-30. [DOI: 10.1021/jp107899g] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Artur Nenov
- Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, D-81377 München, Germany, and BioMolecular Optics and Munich Center for Integrated Protein Science CIPSM, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany
| | - Thorben Cordes
- Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, D-81377 München, Germany, and BioMolecular Optics and Munich Center for Integrated Protein Science CIPSM, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany
| | - Teja T. Herzog
- Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, D-81377 München, Germany, and BioMolecular Optics and Munich Center for Integrated Protein Science CIPSM, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany
| | - Wolfgang Zinth
- Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, D-81377 München, Germany, and BioMolecular Optics and Munich Center for Integrated Protein Science CIPSM, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany
| | - Regina de Vivie-Riedle
- Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, D-81377 München, Germany, and BioMolecular Optics and Munich Center for Integrated Protein Science CIPSM, Fakultät für Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany
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15
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Roy SC, Varghese OK, Paulose M, Grimes CA. Toward solar fuels: photocatalytic conversion of carbon dioxide to hydrocarbons. ACS NANO 2010; 4:1259-78. [PMID: 20141175 DOI: 10.1021/nn9015423] [Citation(s) in RCA: 715] [Impact Index Per Article: 51.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The past several decades have seen a significant rise in atmospheric carbon dioxide levels resulting from the combustion of hydrocarbon fuels. A solar energy based technology to recycle carbon dioxide into readily transportable hydrocarbon fuel (i.e., a solar fuel) would help reduce atmospheric CO2 levels and partly fulfill energy demands within the present hydrocarbon based fuel infrastructure. We review the present status of carbon dioxide conversion techniques, with particular attention to a recently developed photocatalytic process to convert carbon dioxide and water vapor into hydrocarbon fuels using sunlight.
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Affiliation(s)
- Somnath C Roy
- Department of Electrical Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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16
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Norton JE, Houk KN. H/vinyl conical intersections of hexatrienes related to the hula-twist photoisomerization. Mol Phys 2007. [DOI: 10.1080/00268970500417606] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Joseph E. Norton
- a Department of Chemistry and Biochemistry , University of California , Los Angeles, CA 90095-1569, USA
| | - K. N. Houk
- a Department of Chemistry and Biochemistry , University of California , Los Angeles, CA 90095-1569, USA
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17
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Robb MA, Garavelli M, Olivucci M, Bernardi F. A Computational Strategy for Organic Photochemistry. REVIEWS IN COMPUTATIONAL CHEMISTRY 2007. [DOI: 10.1002/9780470125922.ch2] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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18
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Lü LL, Yuan K, Wang YC, Wang HQ. A CASSCF study on photodissociation of the N2O32- dianion. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Reactive species from aromatics and oxa-di-π-methane rearrangement: a stereoselective synthesis of (±)-hirsutene from salicyl alcohol. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.096] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Liu Y, Zhang Y. Stereo- and regiospecific four-molecule reaction of aroyl chlorides with iso -pentylene: direct formation of ( E )-β,γ-unsaturated carbonyl compounds promoted by samarium metal in DMF. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.11.124] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Singh V, Tosh DK, Mobin SM. Synthesis of embellished bicyclo[2.2.2]octenones and a sigmatropic 1,2-acyl shift in an excited state: a novel and stereoselective route to (±)-hirsutic acid C and complicatic acid. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.12.095] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Singh V, Lahiri S, Kane VV, Stey T, Stalke D. Efficient stereoselective synthesis of novel steroid-polyquinane hybrids. Org Lett 2003; 5:2199-202. [PMID: 12816408 DOI: 10.1021/ol0342960] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A synthesis of steroid-polyquinane hybrids, a new class of molecular entities, is described. [reaction: see text]
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Affiliation(s)
- Vishwakarma Singh
- Department of Chemistry, Indian Institute of Technology, Bombay 400 076, India.
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Singh V, Lahiri S. π4s+π2s Cycloaddition between electron deficient π-systems and photoreaction of β,γ-enones: a novel stereoselective entry into angular triquinanes. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00887-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Singh V, Vedantham P, Kane VV, Polborn K. Novel entry into oxepane–diquinane and oxepane–sterpurane hybrids: synthesis and photochemistry of 3-oxatricyclo[7.2.2.01,7]tridecenones. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02611-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Robb MA, Olivucci M. Photochemical processes: potential energy surface topology and rationalization using VB arguments. J Photochem Photobiol A Chem 2001. [DOI: 10.1016/s1010-6030(01)00453-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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A computational study of the factors controlling triplet-state reactivity in 1,4-pentadiene. J Org Chem 2000; 65:7878-88. [PMID: 11073594 DOI: 10.1021/jo0008946] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The triplet-state reactions of 1,4-pentadiene have been investigated using density functional theory (UB3LYP) and ab initio (CASSCF) calculations with a 6-31G basis set. Intramolecular [2 + 2] photocycloadditions and three different reaction pathways leading to vinylcyclopropane have been examined. The computed results are in good agreement with the experimental observations, predicting the dominant product to be vinylcyclopropane produced by a di-pi-methane rearrangement, and the favored [2 + 2] cycloaddition product to be bicyclo[2.1.0]pentane. Reaction pathways involving initial C-C or C-H bond cleavage were found to be too high in energy to be significant. Both the [2 + 2] cycloadditions and the di-pi-methane rearrangement proceed through cyclic biradical intermediates formed on the triplet surface. The relative rates of formation of these triplet biradicals are found to depend on three factors: biradical stability, the geometry of the transition structure, and orbital interactions through bonds.
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Wilsey S, Houk KN. H/Allyl and Alkyl/Allyl Conical Intersections: Ubiquitous Control Elements in Photochemical Sigmatropic Shifts. J Am Chem Soc 2000. [DOI: 10.1021/ja993302d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah Wilsey
- Physical and Theoretical Chemistry Laboratory University of Oxford, South Parks Road Oxford OX1 3QZ, UK Department of Chemistry and Biochemistry University of California Los Angeles, California, 90095-1569
| | - K. N. Houk
- Physical and Theoretical Chemistry Laboratory University of Oxford, South Parks Road Oxford OX1 3QZ, UK Department of Chemistry and Biochemistry University of California Los Angeles, California, 90095-1569
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The role of conical intersections and excited state reaction paths in photochemical pericyclic reactions. J Photochem Photobiol A Chem 1997. [DOI: 10.1016/s1010-6030(96)04573-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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