1
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Gu X, Shen J, Xu Z, Liu J, Shi M, Wei Y. Visible-Light-Mediated Activation of Remote C(sp 3)-H Bonds by Carbon-Centered Biradical via Intramolecular 1,5- or 1,6-Hydrogen Atom Transfer. Angew Chem Int Ed Engl 2024; 63:e202409463. [PMID: 39031578 DOI: 10.1002/anie.202409463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/22/2024]
Abstract
In this study, we introduce a novel intramolecular hydrogen atom transfer (HAT) reaction that efficiently yields azetidine, oxetane, and indoline derivatives through a mechanism resembling the carbon analogue of the Norrish-Yang reaction. This process is facilitated by excited triplet-state carbon-centered biradicals, enabling the 1,5-HAT reaction by suppressing the critical 1,4-biradical intermediates from undergoing the Norrish Type II cleavage reaction, and pioneering unprecedented 1,6-HAT reactions initiated by excited triplet-state alkenes. We demonstrate the synthetic utility and compatibility of this method across various functional groups, validated through scope evaluation, large-scale synthesis, and derivatization. Our findings are supported by control experiments, deuterium labeling, kinetic studies, cyclic voltammetry, Stern-Volmer experiments, and density functional theory (DFT) calculations.
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Affiliation(s)
- Xintao Gu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Jiahao Shen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Ziyu Xu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Jiaxin Liu
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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2
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Yamada S, Honda Y. Solid-state [2+2] photodimerization of eniminium salts: stereoselective syntheses of 1,3-diacetylcyclobutanes. Chem Commun (Camb) 2024; 60:9821-9824. [PMID: 39171390 DOI: 10.1039/d4cc03691c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Solid-state [2+2] photodimerization of eniminium ions oriented in a head-to-tail manner controlled by cation-π interactions produced synHT dimers in high yields. As the resulting dimer is readily converted to 1,3-diacetylcyclobutane, the iminium serves as a removable orientation-controlling group for the conjugated ketones.
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Affiliation(s)
- Shinji Yamada
- Professional University of Beauty & Wellness, 3-9-3 Ushikubo, Tsuzuki-ku, Yokohama 224-0012, Japan.
| | - Yuka Honda
- Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
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3
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Santos CMM, Silva AMS. Transition Metal-Catalyzed Transformations of Chalcones. CHEM REC 2024; 24:e202400060. [PMID: 39008887 DOI: 10.1002/tcr.202400060] [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: 04/02/2024] [Revised: 05/09/2024] [Indexed: 07/17/2024]
Abstract
Chalcones are a class of naturally occurring flavonoid compounds associated to a variety of biological and pharmacological properties. Several reviews have been published describing the synthesis and biological properties of a vast array of analogues. However, overviews on the reactivity of chalcones has only been explored in a few accounts. To fill this gap, a systematic survey on the most recent developments in the transition metal-catalyzed transformation of chalcones was performed. The chemistry of copper, palladium, zinc, iron, manganese, nickel, ruthenium, cobalt, rhodium, iridium, silver, indium, gold, titanium, platinum, among others, as versatile catalysts will be highlighted, covering the literature from year 2000 to 2023, in more than 380 publications.
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Affiliation(s)
- Clementina M M Santos
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
- Laboratório para a Sustentabilidade e Tecnologia em Regiões de Montanha, Instituto Politécnico de Bragança, Campus de Santa Bragança, Apolónia, 5300-253, Bragança, Portugal
| | - Artur M S Silva
- LAQV, REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Campus de Santiago, 3810-193, Aveiro, Portugal
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4
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Wearing ER, Yeh YC, Terrones GG, Parikh SG, Kevlishvili I, Kulik HJ, Schindler CS. Visible light-mediated aza Paternò-Büchi reaction of acyclic oximes and alkenes to azetidines. Science 2024; 384:1468-1476. [PMID: 38935726 DOI: 10.1126/science.adj6771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 05/15/2024] [Indexed: 06/29/2024]
Abstract
The aza Paternò-Büchi reaction is a [2+2]-cycloaddition reaction between imines and alkenes that produces azetidines, four-membered nitrogen-containing heterocycles. Currently, successful examples rely primarily on either intramolecular variants or cyclic imine equivalents. To unlock the full synthetic potential of aza Paternò-Büchi reactions, it is essential to extend the reaction to acyclic imine equivalents. Here, we report that matching of the frontier molecular orbital energies of alkenes with those of acyclic oximes enables visible light-mediated aza Paternò-Büchi reactions through triplet energy transfer catalysis. The utility of this reaction is further showcased in the synthesis of epi-penaresidin B. Density functional theory computations reveal that a competition between the desired [2+2]-cycloaddition and alkene dimerization determines the success of the reaction. Frontier orbital energy matching between the reactive components lowers transition-state energy (ΔGǂ) values and ultimately promotes reactivity.
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Affiliation(s)
- Emily R Wearing
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yu-Cheng Yeh
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Gianmarco G Terrones
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Seren G Parikh
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ilia Kevlishvili
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Heather J Kulik
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Corinna S Schindler
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Chemistry, University of British Columbia, Vancouver V6T 1Z1 BC, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver V6T 1Z4 BC, Canada
- BC Cancer, Vancouver V5Z 1G1 BC, Canada
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5
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Qin Z, Gu Y, Young D, Hu F, Luo Z. Stereoselective Solid-State Synthesis of Biologically Active Cyclobutane and Dicyclobutane Isomers via Conformation Blocking and Transference. Molecules 2024; 29:2909. [PMID: 38930974 PMCID: PMC11206361 DOI: 10.3390/molecules29122909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/29/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
Conformations in the solid state are typically fixed during crystallization. Transference of "frozen" C=C conformations in 3,5-bis((E)-2-(pyridin-4-yl)vinyl)methylbenzene (CH3-3,5-bpeb) by photodimerization selectively yielded cyclobutane and dicyclobutane isomers, one of which (Isomer 2) exhibited excellent in vitro anti-cancer activity towards T-24, 7402, MGC803, HepG-2, and HeLa cells.
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Affiliation(s)
- Zhen Qin
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
- College of Intelligent Metallurgy, Guangxi Modern Polytechnic College, Hechi 473000, China
| | - Yunqiong Gu
- School of Environment and Life Science, Nanning Normal University, Nanning 530001, China
| | - Davidjames Young
- Glasgow College UESTC, University of Electronic Science and Technology of China, Chengdu 611731, China;
| | - Feilong Hu
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Zhirong Luo
- Guangxi Key Laboratory of Urban Water Environment, College of Chemistry & Environment Engineering, Baise University, Baise 533000, China
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6
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Arena D, Verde-Sesto E, Rivilla I, Pomposo JA. Artificial Photosynthases: Single-Chain Nanoparticles with Manifold Visible-Light Photocatalytic Activity for Challenging "in Water" Organic Reactions. J Am Chem Soc 2024; 146:14397-14403. [PMID: 38639303 PMCID: PMC11140743 DOI: 10.1021/jacs.4c02718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/20/2024]
Abstract
Photocatalyzed reactions of organic substances in aqueous media are challenging transformations, often because of scarce solubility of substrates and catalyst deactivation. Herein, we report single-chain nanoparticles, SCNPs, capable of efficiently catalyzing four different "in water" organic reactions by employing visible light as the only external energy source. Specifically, we decorated a high-molecular-weight copolymer, poly(OEGMA300-r-AEMA), with iridium(III) cyclometalated complex pendants at varying content amounts. The isolated functionalized copolymers demonstrated self-assembly into noncovalent, amphiphilic SCNPs in water, which enabled efficient visible-light photocatalysis of two reactions unprecedentedly reported in water, namely, [2 + 2] photocycloaddition of vinyl arenes and α-arylation of N-arylamines. Additionally, aerobic oxidation of 9-substituted anthracenes and β-sulfonylation of α-methylstyrene were successfully carried out in aqueous media. Hence, by merging metal-mediated photocatalysis and SCNPs for the fabrication of artificial photoenzyme-like nano-objects─i.e., artificial photosynthases (APS)─our work broadens the possibilities for performing challenging "in water" organic transformations via visible-light photocatalysis.
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Affiliation(s)
- Davide Arena
- Centro
de Física de Materiales (CSIC-UPV/EHU)-Materials Physics Center
MPC, P° Manuel Lardizabal 5, E-20018 Donostia, Spain
| | - Ester Verde-Sesto
- Centro
de Física de Materiales (CSIC-UPV/EHU)-Materials Physics Center
MPC, P° Manuel Lardizabal 5, E-20018 Donostia, Spain
- IKERBASQUE-Basque
Foundation for Science, Plaza Euskadi 5, E-48009 Bilbao, Spain
| | - Iván Rivilla
- IKERBASQUE-Basque
Foundation for Science, Plaza Euskadi 5, E-48009 Bilbao, Spain
- Departamento
de Química Orgánica I, Centro de Innovación en
Química Avanzada (ORFEO−CINQA), University of the Basque Country (UPV/EHU), Faculty of Chemistry, P° Manuel Lardizabal 3, E-20018 Donostia, Spain
- Donostia
International Physics Center (DIPC), P° Manuel Lardizabal 4, E-20018 Donostia, Spain
| | - José A. Pomposo
- Centro
de Física de Materiales (CSIC-UPV/EHU)-Materials Physics Center
MPC, P° Manuel Lardizabal 5, E-20018 Donostia, Spain
- IKERBASQUE-Basque
Foundation for Science, Plaza Euskadi 5, E-48009 Bilbao, Spain
- Departamento
de Polímeros y Materiales Avanzados: Física, Química
y Tecnología, University of the Basque
Country (UPV/EHU), Faculty of Chemistry, P° Manuel Lardizabal 3, E-20018 Donostia, Spain
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7
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Millward F, Zysman-Colman E. Mechanophotocatalysis: A Generalizable Approach to Solvent-minimized Photocatalytic Reactions for Organic Synthesis. Angew Chem Int Ed Engl 2024; 63:e202316169. [PMID: 38263796 DOI: 10.1002/anie.202316169] [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: 10/25/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 01/25/2024]
Abstract
This proof-of-concept study cements the viability and generality of mechanophotocatalysis, merging mechanochemistry and photocatalysis to enable solvent-minimized photocatalytic reactions. We demonstrate the transmutation of four archetypal solution-state photocatalysis reactions to a solvent-minimized environment driven by the combined actions of milling, light, and photocatalysts. The chlorosulfonylation of alkenes and the pinacol coupling of aldehydes and ketones were conducted under solvent-free conditions with competitive or superior efficiencies to their solution-state analogues. Furthermore, decarboxylative alkylations are shown to function efficiently under solvent-minimized conditions, while the photoinduced energy transfer promoted [2+2] cycloaddition of chalcone experiences a significant initial rate enhancement over its solution-state variant. This work serves as a platform for future discoveries in an underexplored field: validating that solvent-minimized photocatalysis is not only generalizable and competitive with solution-state photocatalysis, but can also offer valuable advantages.
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Affiliation(s)
- Francis Millward
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, United Kingdom
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, United Kingdom
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8
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Zhang B, Li TT, Mao ZC, Jiang M, Zhang Z, Zhao K, Qu WY, Xiao WJ, Chen JR. Enantioselective Cyanofunctionalization of Aromatic Alkenes via Radical Anions. J Am Chem Soc 2024; 146:1410-1422. [PMID: 38179949 DOI: 10.1021/jacs.3c10439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Alkene radical ions constitute an integral and unique class of reactive intermediates for the synthesis of valuable compounds because they have both unpaired spins and charge. However, relatively few synthetic applications of alkene radical anions have emerged due to a dearth of generally applicable and mild radical anion generation approaches. Precise control over the chemo- and stereoselectivity in alkene radical anion-mediated processes represents another long-standing challenge due to their high reactivity. To overcome these issues, here, we develop a new redox-neutral strategy that seamlessly merges photoredox and copper catalysis to enable the controlled generation of alkene radical anions and their orthogonal enantioselective cyanofunctionalization via distonic-like species. This new strategy enables highly regio-, chemo-, and enantioselective hydrocyanation, deuterocyanation, and cyanocarboxylation of alkenes without stoichiometric reductants or oxidants under visible light irradiation. This protocol provides a new blueprint for the exploration of the transformation potential of alkene radical anions.
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Affiliation(s)
- Bin Zhang
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Tian-Tian Li
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Zhi-Cheng Mao
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Min Jiang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Zhihan Zhang
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Ke Zhao
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Wen-Yuan Qu
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Wen-Jing Xiao
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
- Wuhan Institute of Photochemistry and Technology, 7 North Bingang Road, Wuhan, Hubei 430082, China
| | - Jia-Rong Chen
- College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
- Wuhan Institute of Photochemistry and Technology, 7 North Bingang Road, Wuhan, Hubei 430082, China
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9
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Singh S, Chakrabortty G, Raha Roy S. Skeletal rearrangement through photocatalytic denitrogenation: access to C-3 aminoquinolin-2(1 H)-ones. Chem Sci 2023; 14:12541-12547. [PMID: 38020365 PMCID: PMC10646921 DOI: 10.1039/d3sc04447e] [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: 08/24/2023] [Accepted: 10/13/2023] [Indexed: 12/01/2023] Open
Abstract
The addition of an amine group to a heteroaromatic system is a challenging synthetic process, yet it is an essential one in the development of many bioactive molecules. Here, we report an alternative method for the synthesis of 3-amino quinolin-2(1H)-one that overcomes the limitations of traditional methods by editing the molecular skeleton via a cascade C-N bond formation and denitrogenation process. We used TMSN3 as an aminating agent and a wide variety of 3-ylideneoxindoles as synthetic precursors for the quinolin-2(1H)-one backbone, which demonstrates remarkable tolerance of sensitive functional groups. The control experiments showed that the triazoline intermediate plays a significant role in the formation of the product. The spectroscopic investigation further defined the potential reaction pathways.
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Affiliation(s)
- Swati Singh
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
| | - Gopal Chakrabortty
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
| | - Sudipta Raha Roy
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
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10
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Genzink MJ, Rossler MD, Recendiz H, Yoon TP. A General Strategy for the Synthesis of Truxinate Natural Products Enabled by Enantioselective [2+2] Photocycloadditions. J Am Chem Soc 2023; 145:19182-19188. [PMID: 37603410 PMCID: PMC10528511 DOI: 10.1021/jacs.3c07132] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Pseudodimeric cyclobutanes constitute a large class of natural products that could, in principle, be efficiently synthesized via [2+2] photocycloadditions. However, the difficulty in developing chemo-, regio-, diastereo-, and enantioselective cycloadditions has limited their use in asymmetric syntheses. Herein, we show that chiral acid catalysts promote highly selective visible-light photocycloadditions, the products of which can be quickly transformed into truxinate natural products. This general approach has enabled the synthesis of both dimeric and pseudodimeric cyclobutane natural products with excellent enantioselectivity.
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Affiliation(s)
- Matthew J. Genzink
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, United States
| | - Matthew D. Rossler
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, United States
| | - Herman Recendiz
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, United States
| | - Tehshik P. Yoon
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, United States
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11
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Medici F, Puglisi A, Rossi S, Raimondi L, Benaglia M. Stereoselective [2 + 2] photodimerization: a viable strategy for the synthesis of enantiopure cyclobutane derivatives. Org Biomol Chem 2023; 21:2899-2904. [PMID: 36939196 DOI: 10.1039/d3ob00232b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
The [2 + 2] photodimerization of cinnamic acid derivatives to afford enantiopure cyclobutanes has been investigated. The use of a chiral auxiliary represents a convenient and straightforward method to exert enantiocontrol on the reaction. By exploiting Evans oxazolidinones, the stereoselective light-driven cyclisation affords a functionalised cyclobutane ring with up to 99% enantiocontrol after removing the chiral auxiliary. In-flow experiments allowed us to improve further the efficiency of the methodology, leading to high conversion and excellent enantioselectivity.
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Affiliation(s)
- Fabrizio Medici
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy.
| | - Alessandra Puglisi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy.
| | - Sergio Rossi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy.
| | - Laura Raimondi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy.
| | - Maurizio Benaglia
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy.
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12
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Jiang Y, Zhu H, Chen J, Liao S. Organocatalytic [2 + 2] Photopolymerization under Visible Light: Accessing Sustainable Polymers from Cinnamic Acids. Macromol Rapid Commun 2023; 44:e2200702. [PMID: 36404649 DOI: 10.1002/marc.202200702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/30/2022] [Indexed: 11/22/2022]
Abstract
Herein, the successful development of a metal-free, solution [2 + 2] photopolymerization of natural cinnamic acid-derived bisolefinic monomers is reported, which is enabled by a strategy based on direct triplet state access via energy transfer catalysis. 2,2'-Methoxythioxanthone has been identified as an effective organic photocatalyst for the [2 + 2] photopolymerization in solution, which can be excited by visible light and activate the biscinnamate monomers via triplet energy transfer. This method features its metal-free conditions, visible light utilization, solution polymerization, and abundant biomass-based feedstock, as well as processable polymer products, which is different from the rigid, insoluble products obtained from solid-state photopolymerization. This solution polymerization method also shows a good compatibility to monomer structures; cinnamic acid-derived bisolefinic monomers with different linkers, including diamine, natural diol, and bisphenol, can all readily undergo [2 + 2] photopolymerization, and be transformed into colorless, sustainable polymers.
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Affiliation(s)
- Yu Jiang
- Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Hui Zhu
- Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Jianxu Chen
- Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Saihu Liao
- Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, China.,Beijing National Laboratory for Molecular Science, Beijing, 100190, China
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13
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Golfmann M, Glagow L, Giakoumidakis A, Golz C, Walker JCL. Organophotocatalytic [2+2] Cycloaddition of Electron-Deficient Styrenes. Chemistry 2023; 29:e202202373. [PMID: 36282627 PMCID: PMC10100360 DOI: 10.1002/chem.202202373] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Indexed: 11/05/2022]
Abstract
A visible-light organophotocatalytic [2+2] cycloaddition of electron-deficient styrenes is described. Photocatalytic [2+2] cycloadditions are typically performed with electron-rich styrene derivatives or α,β-unsaturated carbonyl compounds, and with transition-metal-based catalysts. We have discovered that an organic cyanoarene photocatalyst is able to deliver high-value cyclobutane products bearing electron-deficient aryl substituents in good yields. A range of electron-deficient substituents are tolerated, and both homodimerisations and intramolecular [2+2] cycloadditions to fused bicyclic systems are available by using this methodology.
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Affiliation(s)
- Maxim Golfmann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Louis Glagow
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Antonios Giakoumidakis
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany.,University of Ioannina, Department of Chemistry, Section of Organic Chemistry and Biochemistry, 45110, Ioannina, Greece
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Johannes C L Walker
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
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14
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Ma R, Cheng S, Sun J, Zhu W, Fu P. Antibacterial Gilvocarcin-Type Aryl- C-Glycosides from a Soil-Derived Streptomyces Species. JOURNAL OF NATURAL PRODUCTS 2022; 85:2282-2289. [PMID: 36108248 DOI: 10.1021/acs.jnatprod.2c00438] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Seven new gilvocarcin-type aryl-C-glycosides (1-7) and six known analogues (8-13) were isolated from the soil-derived Streptomyces sp. OUCMDZ-945. Their structures including absolute configurations were determined based on detailed spectroscopic analysis, chemical methods, ECD curves, and quantum chemical calculations. Compound 1, which we named digilvocarcin A, is the first reported bis-gilvocarcin derivative possessing a novel cyclobutane moiety. This dimeric skeleton was confirmed to be formed from gilvocarcin V (8) through a light-induced [2 + 2] cycloaddition. Compounds 1, 2, 5-8, and 11 showed antibacterial activity against Staphylococcus aureus ATCC 6538 and methicillin-resistant Staphylococcus aureus subsp. aureus ATCC 43300 (MIC values: 0.25-64 μg/mL).
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Affiliation(s)
- Rui Ma
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Shan Cheng
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Jiwen Sun
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, People's Republic of China
| | - Peng Fu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, People's Republic of China
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15
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Lenihan JM, Mailloux MJ, Beeler AB. Multigram Scale Synthesis of Piperarborenines C-E. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jason M. Lenihan
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Matthew J. Mailloux
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Aaron B. Beeler
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
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16
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Jiang Y, López-Arteaga R, Weiss EA. Quantum Dots Photocatalyze Intermolecular [2 + 2] Cycloadditions of Aromatic Alkenes Adsorbed to their Surfaces via van der Waals Interactions. J Am Chem Soc 2022; 144:3782-3786. [PMID: 35230100 DOI: 10.1021/jacs.2c00833] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Triplet excited state-initiated photochemistry is a mild and selective route to cycloadditions, radical rearrangements, couplings, fragmentations, and isomerizations. Colloidal quantum dots are proven visible-light photosensitizers and structural scaffolds for triplet-initiated reactions of molecules that are functionalized (with carboxylates) to anchor on the QD surface. Here, with the aid of polyaromatic energy shuttles that act as noncovalent adsorption sites for substrates on the QD surface, the scope of QD-photocatalyzed intermolecular [2 + 2] cycloadditions is extended to freely diffusing substrates (no anchoring groups). QD-shuttle complexes photocatalyze homo- and heterointermolecular [2 + 2] photocycloadditions of benzalacetone, chalcone and its derivatives with up to 94% yield; the yields for all reactions are comparable to those achieved by Ir(ppy)3 but with the advantages of a factor of 2.5 lower catalyst loading, superior stability, and the ability to recover the catalyst by simple centrifugation and reuse it for multiple reaction cycles. Experiments imply a two-step triplet-triplet energy transfer mechanism, one energy transfer from the QD to the energy shuttle followed by a second energy transfer from the shuttle to the transiently adsorbed substrate.
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Affiliation(s)
- Yishu Jiang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Rafael López-Arteaga
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Emily A Weiss
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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17
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Sierra S, Gomez MV, Jiménez AI, Pop A, Silvestru C, Marín ML, Boscá F, Sastre G, Gómez-Bengoa E, Urriolabeitia EP. Stereoselective, Ruthenium-Photocatalyzed Synthesis of 1,2-Diaminotruxinic Bis-amino Acids from 4-Arylidene-5(4 H)-oxazolones. J Org Chem 2022; 87:3529-3545. [PMID: 35143202 PMCID: PMC8902759 DOI: 10.1021/acs.joc.1c03092] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
![]()
The irradiation of
(Z)-2-phenyl-4-aryliden-5(4H)-oxazolones 1 in deoxygenated CH2Cl2 at 25 °C
with blue light (465 nm) in
the presence of [Ru(bpy)3](BF4)2 (5%
mole ratio) as a triplet photocatalyst promotes
the [2+2] photocycloaddition of the C=C bonds of the 4-arylidene
moiety, thus allowing the completely regio- and stereoselective formation
of cyclobutane-bis(oxazolone)s 2 as single stereoisomers.
Cyclobutanes 2 have been unambiguously characterized
as the μ-isomers and contain two E-oxazolones
coupled in an anti-head-to-head form. The use of
continuous-flow techniques in microreactors allows the synthesis of
cyclobutanes 2 in only 60 min, compared with the 24–48
h required in batch mode. Ring opening of the oxazolone heterocycle
in 2 with a base affords the corresponding 1,2-diaminotruxinic
bis-amino esters 3, which are also obtained selectively
as μ-isomers. The ruthenium complex behaves as a triplet photocatalyst,
generating the reactive excited state of the oxazolone via an energy-transfer
process. This reactive excited state has been characterized as a triplet
diradical 3(E/Z)-1* by laser flash photolysis (transient absorption spectroscopy).
This technique also shows that this excited state is the same when
starting from either (Z)- or (E)-oxazolones.
Density functional theory calculations show that the first step of
the [2+2] cycloaddition between 3(E/Z)-1* and (Z)-1 is formation of
the C(H)–C(H) bond and that (Z) to (E) isomerization takes place at the 1,4-diradical thus formed.
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Affiliation(s)
- Sonia Sierra
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC-Universidad de Zaragoza), Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - M Victoria Gomez
- Instituto Regional de Investigación Científica Aplicada (IRICA), Universidad de Castilla-La Mancha, Avenida Camilo José Cela s/n, 13071 Ciudad Real, Spain
| | - Ana I Jiménez
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC-Universidad de Zaragoza), Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Alexandra Pop
- Department of Chemistry, Supramolecular Organic and Organometallic Chemistry Centre (SOOMCC), Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos, 400028 Cluj-Napoca, Romania
| | - Cristian Silvestru
- Department of Chemistry, Supramolecular Organic and Organometallic Chemistry Centre (SOOMCC), Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos, 400028 Cluj-Napoca, Romania
| | - Maria Luisa Marín
- Instituto Universitario Mixto de Tecnología Química (ITQ-UPV), Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Francisco Boscá
- Instituto Universitario Mixto de Tecnología Química (ITQ-UPV), Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Germán Sastre
- Instituto Universitario Mixto de Tecnología Química (ITQ-UPV), Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I, Universidad del País Vasco, UPV-EHU, Apdo. 1072, CP-20080 Donostia-San Sebastián, Spain
| | - Esteban P Urriolabeitia
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC-Universidad de Zaragoza), Pedro Cerbuna 12, 50009 Zaragoza, Spain
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18
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Liao LL, Wang ZH, Cao KG, Sun GQ, Zhang W, Ran CK, Li Y, Chen L, Cao GM, Yu DG. Electrochemical Ring-Opening Dicarboxylation of Strained Carbon-Carbon Single Bonds with CO 2: Facile Synthesis of Diacids and Derivatization into Polyesters. J Am Chem Soc 2022; 144:2062-2068. [PMID: 35084189 DOI: 10.1021/jacs.1c12071] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Diacids are important monomers in the polymer industry to construct valuable materials. Dicarboxylation of unsaturated bonds, such as alkenes and alkynes, with CO2 has been demonstrated as a promising synthetic method. However, dicarboxylation of C─C single bonds with CO2 has rarely been investigated. Herein we report a novel electrochemical ring-opening dicarboxylation of C─C single bonds in strained rings with CO2. Structurally diverse glutaric acid and adipic acid derivatives were synthesized from substituted cyclopropanes and cyclobutanes in moderate to high yields. In contrast to oxidative ring openings, this is also the first realization of an electroreductive ring-opening reaction of strained rings, including commercialized ones. Control experiments suggested that radical anions and carbanions might be the key intermediates in this reaction. Moreover, this process features high step and atom economy, mild reaction conditions (1 atm, room temperature), good chemoselectivity and functional group tolerance, low electrolyte concentration, and easy derivatization of the products. Furthermore, we conducted polymerization of the corresponding diesters with diols to obtain a potential UV-shielding material with a self-healing function and a fluorine-containing polyester, whose performance tests showed promising applications.
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Affiliation(s)
- Li-Li Liao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Zhe-Hao Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China
| | - Ke-Gong Cao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Guo-Quan Sun
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Wei Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Chuan-Kun Ran
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yiwen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China
| | - Li Chen
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Guang-Mei Cao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Da-Gang Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China.,Beijing National Laboratory for Molecular Sciences, Beijing 100190, People's Republic of China
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19
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Jiang Y, Ma Q, Zhang X, Li J, Liao S. Solution [2 + 2] photopolymerization of biomass-derived nonrigid biscinnamate monomers enabled by energy transfer catalysis. Polym Chem 2022. [DOI: 10.1039/d2py00161f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Visible light-mediated [2 + 2] photopolymerization of nonrigid biscinnamate monomers has been realized in solution via energy transfer catalysis, featuring its operation simplicity, controllability, and a general monomer scope.
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Affiliation(s)
- Yu Jiang
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Qiang Ma
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Xun Zhang
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Junfang Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Saihu Liao
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
- Beijing National Laboratory of Molecular Science (BNLMS), Beijing 100190, China
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20
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Takano H, You Y, Hayashi H, Harabuchi Y, Maeda S, Mita T. Radical Difunctionalization of Gaseous Ethylene Guided by Quantum Chemical Calculations: Selective Incorporation of Two Molecules of Ethylene. ACS OMEGA 2021; 6:33846-33854. [PMID: 34926931 PMCID: PMC8675046 DOI: 10.1021/acsomega.1c05102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/22/2021] [Indexed: 05/03/2023]
Abstract
Ethylene, of which about 170 million tons are produced annually worldwide, is a fundamental C2 feedstock that is widely used on an industrial scale for the synthesis of polyethylenes and polyvinylchlorides. Compared to other alkenes, however, the direct use of ethylene for the synthesis of fine chemicals such as pharmaceuticals and agrochemicals is limited, probably due to its small and gaseous character. We, herein, report a new radical difunctionalization strategy of ethylene, aided by quantum chemical calculations. Computationally proposed imidyl and sulfonyl radicals can be introduced into ethylene in the presence of an Ir photocatalyst under irradiation with blue light-emitting diodes (LEDs) (λmax = 440 nm). The present reaction systems led to the selective incorporation of two molecules of ethylene into the substrate, which could be rationally explained by computational analysis.
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Affiliation(s)
- Hideaki Takano
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- JST,
ERATO Maeda Artificial Intelligence in Chemical Reaction Design and
Discovery Project, Kita
10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yong You
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- JST,
ERATO Maeda Artificial Intelligence in Chemical Reaction Design and
Discovery Project, Kita
10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Hiroki Hayashi
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- JST,
ERATO Maeda Artificial Intelligence in Chemical Reaction Design and
Discovery Project, Kita
10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yu Harabuchi
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- JST,
ERATO Maeda Artificial Intelligence in Chemical Reaction Design and
Discovery Project, Kita
10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
- Department
of Chemistry, Faculty of Science, Hokkaido
University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Satoshi Maeda
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- JST,
ERATO Maeda Artificial Intelligence in Chemical Reaction Design and
Discovery Project, Kita
10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
- Department
of Chemistry, Faculty of Science, Hokkaido
University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
- Research
and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
| | - Tsuyoshi Mita
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- JST,
ERATO Maeda Artificial Intelligence in Chemical Reaction Design and
Discovery Project, Kita
10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
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21
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22
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Jung H, Hong M, Marchini M, Villa M, Steinlandt PS, Huang X, Hemming M, Meggers E, Ceroni P, Park J, Baik MH. Understanding the mechanism of direct visible-light-activated [2 + 2] cycloadditions mediated by Rh and Ir photocatalysts: combined computational and spectroscopic studies. Chem Sci 2021; 12:9673-9681. [PMID: 34349938 PMCID: PMC8293808 DOI: 10.1039/d1sc02745j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/07/2021] [Indexed: 01/21/2023] Open
Abstract
The mechanism of [2 + 2] cycloadditions activated by visible light and catalyzed by bis-cyclometalated Rh(iii) and Ir(iii) photocatalysts was investigated, combining density functional theory calculations and spectroscopic techniques. Experimental observations show that the Rh-based photocatalyst produces excellent yield and enantioselectivity whereas the Ir-photocatalyst yields racemates. Two different mechanistic features were found to compete with each other, namely the direct photoactivation of the catalyst-substrate complex and outer-sphere triplet energy transfer. Our integrated analysis suggests that the direct photocatalysis is the inner working of the Rh-catalyzed reaction, whereas the Ir catalyst serves as a triplet sensitizer that activates cycloaddition via an outer-sphere triplet excited state energy transfer mechanism.
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Affiliation(s)
- Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Mannkyu Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Marianna Marchini
- Department of Chemistry "Giacomo Ciamician", University of Bologna via Selmi 2 40126 Bologna Italy
| | - Marco Villa
- Department of Chemistry "Giacomo Ciamician", University of Bologna via Selmi 2 40126 Bologna Italy
| | - Philipp S Steinlandt
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Xiaoqiang Huang
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Marcel Hemming
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Paola Ceroni
- Department of Chemistry "Giacomo Ciamician", University of Bologna via Selmi 2 40126 Bologna Italy
| | - Jiyong Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
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23
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Jeremias N, Mohr LM, Bach T. Intermolecular [2 + 2] Photocycloaddition of α,β-Unsaturated Sulfones: Catalyst-Free Reaction and Catalytic Variants. Org Lett 2021; 23:5674-5678. [PMID: 34263603 DOI: 10.1021/acs.orglett.1c01794] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
2-Aryl-1-sulfonyl-substituted cyclobutanes were prepared in an intermolecular [2 + 2] photocycloaddition from various α,β-unsaturated sulfones and olefins upon irradiation at λ = 300 nm (26 examples, 60-99% yield). Lewis acids catalyzed the [2 + 2] photocycloaddition of 2-benzimidazolyl styryl sulfones. At short wavelengths, the latter substrates underwent C-S bond cleavage but AlBr3 (5 mol %) allowed for an intermolecular reaction with 2,3-dimethyl-2-butene at longer wavelengths. A chiral-at-metal Lewis acid (2 mol %) facilitated an enantioselective reaction (up to 77% ee).
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Affiliation(s)
- Noah Jeremias
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany
| | - Lisa-Marie Mohr
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany
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24
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Heteroleptic copper(I) complexes as energy transfer photocatalysts for the intermolecular [2 + 2] photodimerization of chalcones, cinnamates and cinnamamides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Kölmel DK, Zhu H, Flanagan ME, Sakata SK, Harris AR, Wan J, Morgan BA. Employing Photocatalysis for the Design and Preparation of DNA‐Encoded Libraries: A Case Study. CHEM REC 2021; 21:616-630. [DOI: 10.1002/tcr.202000148] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Dominik K. Kölmel
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Hongyao Zhu
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Mark E. Flanagan
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Sylvie K. Sakata
- Worldwide Research and Development Pfizer Inc 10770 Science Center Drive San Diego CA 92121 United States
| | - Anthony R. Harris
- Worldwide Research and Development Pfizer Inc Eastern Point Road Groton CT 06340 United States
| | - Jinqiao Wan
- HitGen Inc Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District Chengdu City Sichuan Province P. R. China
| | - Barry A. Morgan
- HitGen Inc Building 6, No. 8 Huigu first East Road, Tianfu International Bio-Town, Shuangliu District Chengdu City Sichuan Province P. R. China
- HitGen Pharmaceuticals Inc PO Box 88240 Houston TX 77288 United States
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26
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Xie X, Pan H, Zhou TP, Han MY, Wang L, Geng X, Ma Y, Liao RZ, Wang ZM, Yang J, Li P. ortho-Ethynyl group assisted regioselective and diastereoselective [2 + 2] cross-photocycloaddition of alkenes under photocatalyst-, additive-, and solvent-free conditions. Org Chem Front 2021. [DOI: 10.1039/d1qo01017d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A highly regioselective and diastereoselective [2 + 2]-cross-photocycloaddition between electron-poor and electron-rich/electron-neutral alkenes under visible-light irradiation without a photocatalyst, additive and solvent was developed.
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Affiliation(s)
- Xiaofei Xie
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Hong Pan
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Tai-Ping Zhou
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Man-Yi Han
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
| | - Xiao Geng
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
| | - Yongmin Ma
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
| | - Rong-Zhen Liao
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China
| | - Zhi-Ming Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
| | - Jianguo Yang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
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Wang Z, Flores Q, Guo H, Trevizo R, Zhang X, Wang S. Crystal Engineering Construction of Caffeic Acid Derivatives with Potential Applications in Pharmaceuticals and Degradable Polymeric Materials. CrystEngComm 2020; 22:7847-7857. [PMID: 33343233 PMCID: PMC7744004 DOI: 10.1039/d0ce01403f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Natural products are precious feedstock in drug discovery and sustainable materials. This work using crystal engineering strategy, visible light, and solvent-free cycloaddition successfully constructed two caffeic acid derivatives, rel-(1R,2R,3S,4S)-2,4-bis(3,4-dihydroxyphenyl)cyclobutane-1,3-dicarboxylate and rel-(1R,2R,3S,4S)-2,4-bis(3,4-dihydroxyphenyl)cyclobutane-1,3-dicarboxylic acid. Because of the multiple stereocenters, it is challenging to prepare those compounds using traditional organic synthesis methods. The crystal engineering Hirshfeld surface analysis and 2D intermolecular interaction fingerprints were applied to synthetic route design. The light resources used in this work was visible LED or free, clean, and renewable sunlight. The evidence suggested that pure stereoisomer was obtained demonstrating the stereospecificity and efficiency of the topochemical cycloaddition reaction. The derivatives exhibited free radical scavenging and antioxidant biological activities, as well as the potential inhibitory activity of fatty acid binding proteins. One of the derivatives is the precursor of the natural product Shimobashiric acid C which paves the way for the total synthesis and further study of Shimobashiric acid C. In addition, the derivatives possess photodegradability at a specific wavelength, which is very attractive for "green" degradable polymeric materials.
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Affiliation(s)
- Zhihan Wang
- Department of Physical Sciences, Eastern New Mexico University, Portales, NM 88130, USA
| | - Quinton Flores
- Department of Physical Sciences, Eastern New Mexico University, Portales, NM 88130, USA
| | - Hongye Guo
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin 130021, China
| | - Raquel Trevizo
- Department of Physical Sciences, Eastern New Mexico University, Portales, NM 88130, USA
| | - Xiaochan Zhang
- Department of Physical Sciences, Eastern New Mexico University, Portales, NM 88130, USA
| | - Shihan Wang
- College of Chinese Herbal Medicine, Jilin Agricultural University, Changchun, Jilin 130118, China
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Cage-confined photocatalysis for wide-scope unusually selective [2 + 2] cycloaddition through visible-light triplet sensitization. Nat Commun 2020; 11:4675. [PMID: 32938933 PMCID: PMC7494878 DOI: 10.1038/s41467-020-18487-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 08/19/2020] [Indexed: 12/14/2022] Open
Abstract
Light-induced [2 + 2] cycloaddition is the most straightforward way to generate cyclobutanes, which are core structures of many natural products, drugs and bioactive compounds. Despite continuous advances in selective [2 + 2] cycloaddition research, general method for intermolecular photocatalysis of acyclic olefins with specific regio- and diastereoselectivity, for example, syn-head-to-head (syn-HH) cyclobutane derivatives, is still lack of development but highly desired. Herein, we report a cage-confined photocatalytic protocol to enable unusual intermolecular [2 + 2] cycloaddition for α,β-unsaturated carbonyl compounds. The syn-HH diastereomers are readily generated with diastereoselectivity up to 99%. The cage-catalyst is highly efficient and robust, covering a diverse substrate range with excellent substituent tolerance. The mimic-enzyme catalysis is proposed through a host-guest mediated procedure expedited by aqueous phase transition of reactant and product, where the supramolecular cage effect plays an important role to facilitate substrates inclusion and pre-orientation, offering a promising avenue for general and eco-friendly cycloaddition photocatalysis with special diastereoselectivity. Light-induced [2 + 2] cycloaddition is the most efficient way to generate cyclobutanes, while suffering from limitations of specific selectivity. Here the authors report a cage-confined photocatalytic [2 + 2] cycloaddition to enable the unusual production of syn-head-to-head cyclobutane derivatives selectively.
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Abstract
A four-step synthesis of the dimeric pyrrole-imidazole alkaloid sceptrin is reported. The brevity of the route is based on a simple solution developed for selective assembly of the cyclobutane core of the natural product. The photochemical intermolecular [2 + 2] dimerization of a useful hymenidin surrogate enables direct entry to this enigmatic class of biologically active marine secondary metabolites.
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Affiliation(s)
- Long V Nguyen
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Timothy F Jamison
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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30
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Graßl R, Jandl C, Bach T. Visible Light-Mediated Photochemical Reactions of 2-(2'-Alkenyloxy)cycloalk-2-enones. J Org Chem 2020; 85:11426-11439. [PMID: 32806100 PMCID: PMC7476038 DOI: 10.1021/acs.joc.0c01501] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The title compounds were prepared, and their reactivity was studied upon sensitized irradiation at λ = 420 nm. Thioxanthen-9-one was employed as the sensitizer at a loading of 10 mol % in small-scale reactions and of 2.5 mol % on a larger scale. Cyclohex-2-enones substituted by a 2'-propenyloxy, 2'-butenyloxy, 2'-pentenyloxy, or 2'-methyl-2'-propenyloxy group in the 2-position gave the products of an intramolecular [2 + 2] photocycloadditon. The reaction proceeded with high regioselectivity (crossed product) and perfect diastereoselectivity (nine examples, 34-99% yield). If the olefin in the tether was trisubstituted (3'-methyl-2'-butenyloxy), no cycloaddition was observed. Rather, a cyclization with subsequent hydrogen abstraction occurred (three examples, 65-86% yield). The results are consistent with a reaction course via a triplet enone intermediate and the formation of a 1,4-diradical by an initial cyclization. The analogous cyclopent-2-enones were less prone to an intramolecular reaction. Instead, decomposition or intermolecular [2 + 2] photocycloaddition reactions prevailed. In the latter event, two main products were identified (three examples, 30-43% yield), resulting either from a head-to-head [2 + 2]-photodimerization or from a twofold [2 + 2] photocycloaddition of the enone to the olefin. The latter reaction sequence generated pentacyclic products with a central [1,5]dioxocane ring. The structure assignment of the two product types was corroborated by a single-crystal X-ray analysis.
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Affiliation(s)
- Raphaela Graßl
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
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Rolka AB, Koenig B. Dearomative Cycloadditions Utilizing an Organic Photosensitizer: An Alternative to Iridium Catalysis. Org Lett 2020; 22:5035-5040. [DOI: 10.1021/acs.orglett.0c01622] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessa B. Rolka
- Institute of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Burkhard Koenig
- Institute of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
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33
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Tanaka K, Iwama Y, Kishimoto M, Ohtsuka N, Hoshino Y, Honda K. Redox Potential Controlled Selective Oxidation of Styrenes for Regio- and Stereoselective Crossed Intermolecular [2 + 2] Cycloaddition via Organophotoredox Catalysis. Org Lett 2020; 22:5207-5211. [PMID: 32525321 DOI: 10.1021/acs.orglett.0c01852] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A redox potential controlled intermolecular [2 + 2] cross-cycloaddition has been developed in the presence of a thioxanthylium photoredox catalyst. Electron-rich styrenes such as β-bromostyrene (Ep/2 = +1.61 V vs SCE) were selectively oxidized by a thioxanthylium photoredox catalyst (E1/2 (C*/C•-) = +1.76 V vs SCE) to styryl radical cations and reacted with styrene (Ep/2 = +1.97 V vs SCE) to furnish polysubstituted cyclobutanes in high yields. The present reaction can be successfully applied to intermolecular [2 + 2] cross-cycloaddition of β-halogenostyrenes, which cannot be effectively achieved by the hitherto reported representative organophotoredox catalysts.
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Affiliation(s)
- Kenta Tanaka
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Yoshinori Iwama
- Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Mami Kishimoto
- Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Naoya Ohtsuka
- Institute for Molecular Science, Okazaki, Aichi 444-8787, Japan.,SOKENDAI, Okazaki, Aichi 444-8787, Japan
| | - Yujiro Hoshino
- Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Kiyoshi Honda
- Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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34
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Abramov A, Reiser O, Díaz Díaz D. Effect of Reaction Media on Photosensitized [2+2]-Cycloaddition of Cinnamates. ChemistryOpen 2020; 9:649-656. [PMID: 32499991 PMCID: PMC7266492 DOI: 10.1002/open.202000092] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/10/2020] [Indexed: 01/04/2023] Open
Abstract
The outcome of photosensitized [2+2]-cycloaddition reactions of various cinnamates has been compared in different reaction media, including homogeneous organic solutions under inert conditions, degassed water, and aerated physical gels. The reactions were performed under LED blue light (λmax=455 nm) irradiation and [Ir{dF(CF3)ppy}2(dtb-bpy)]PF6 (1.0 mol%) as photocatalyst. The processes were optimized taking into consideration solvent, gelator, and substrate. Comparative kinetics analyses, as well as the effect of the reaction media on the diastereoselectivity of the process, were evaluated during this investigation. In a number of cases, carrying out the reaction in a less polar solvent, like toluene or highly polar solvent, like water had a tremendous impact on the diastereoselectivity of the process, pointing towards an effect on the stabilization of the putative diradical intermediate in this medium. Moreover, while for reactions run in homogeneous solution oxygen needs to be excluded, no erosion in yield is observed when the photoadditions were run in aerated gel media.
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Affiliation(s)
- Alex Abramov
- Institute of Organic Chemistry University of RegensburgUniversitätstr. 31Regensburg93053Germany
| | - Oliver Reiser
- Institute of Organic Chemistry University of RegensburgUniversitätstr. 31Regensburg93053Germany
| | - David Díaz Díaz
- Institute of Organic Chemistry University of RegensburgUniversitätstr. 31Regensburg93053Germany
- Departamento de Química OrgánicaUniversidad de La LagunaAvda. Astrofísico Francisco Sánchez 338206 LaLagunaTenerifeSpain
- Instituto de Bio-Orgánica Antonio GonzálezUniversidad de La LagunaAvda. Astrofísico Francisco Sánchez 238206 LaLagunaTenerifeSpain
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35
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Urriolabeitia EP, Sánchez P, Pop A, Silvestru C, Laga E, Jiménez AI, Cativiela C. Synthesis of esters of diaminotruxillic bis-amino acids by Pd-mediated photocycloaddition of analogs of the Kaede protein chromophore. Beilstein J Org Chem 2020; 16:1111-1123. [PMID: 32550926 PMCID: PMC7277947 DOI: 10.3762/bjoc.16.98] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 05/08/2020] [Indexed: 02/03/2023] Open
Abstract
The stereoselective synthesis of truxillic bis-amino esters from polyfunctional oxazolones is reported. The reaction of 4-((Z)-arylidene)-2-(E)-styryl-5(4H)-oxazolones 2 with Pd(OAc)2 resulted in ortho-palladation and the formation of a dinuclear open-book complexes 3 with carboxylate bridges, where the Pd atom is C^N bonded to the oxazolone. In 3 the two exocyclic C=C bonds of the oxazolone are in a face-to-face arrangement, which is optimal for their [2 + 2] photocycloaddition. Irradiation of dimers 3 in CH2Cl2 solution with blue light (465 nm) promoted the chemo- and stereoselective [2 + 2] photocycloaddition of the exocyclic C=C bonds and the formation of cyclobutane-containing ortho-palladated complexes 4. Treatment of 4 with CO in a MeOH/NCMe mixture promoted the methoxycarbonylation of the palladated carbon and the release of the corresponding ortho-functionalized 1,3-diaminotruxillic bis-amino esters 5 as single isomers.
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Affiliation(s)
- Esteban P Urriolabeitia
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC - Universidad de Zaragoza), Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Pablo Sánchez
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC - Universidad de Zaragoza), Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Alexandra Pop
- Supramolecular Organic and Organometallic Chemistry Centre, Departament of Chemistry, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Str. Arany Janos 11, RO-400028 Cluj-Napoca, Romania
| | - Cristian Silvestru
- Supramolecular Organic and Organometallic Chemistry Centre, Departament of Chemistry, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Str. Arany Janos 11, RO-400028 Cluj-Napoca, Romania
| | - Eduardo Laga
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC - Universidad de Zaragoza), Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Ana I Jiménez
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC - Universidad de Zaragoza), Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Carlos Cativiela
- Instituto de Síntesis Química y Catálisis Homogénea, ISQCH (CSIC - Universidad de Zaragoza), Pedro Cerbuna 12, E-50009 Zaragoza, Spain
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36
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Pagire SK, Kumagai N, Shibasaki M. Introduction of a 7-aza-6-MeO-indoline auxiliary in Lewis-acid/photoredox cooperative catalysis: highly enantioselective aminomethylation of α,β-unsaturated amides. Chem Sci 2020; 11:5168-5174. [PMID: 34122973 PMCID: PMC8159422 DOI: 10.1039/d0sc01890b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
An efficient cooperative chiral Lewis acid/photoredox catalytic system for engaging highly reactive radicals in highly enantioselective conjugate addition to α,β-unsaturated carbonyls is highly desirable. Direct photoexcitation of unbound substrates typically induces undesired background pathways for racemic products and remains a formidable challenge to be addressed in the area of enantioselective photocatalysis. Herein, we report a cooperative catalytic system comprising a chiral Cu(i) complex and an Ir(iii) photocatalyst fueled by visible-light irradiation that allows for seamless integration of the catalytic formation of α-amino alkyl radicals and subsequent enantioselective addition to α,β-unsaturated amides. A 7-aza-6-MeO-indoline attachment on the amide substrates plays a pivotal role in suppressing the undesired pathways, resulting in excellent enantioselectivity and enabling expedited access to valuable γ-aminobutyramides. The indoline amide was readily diversified with full recovery of the azaindoline attachment, highlighting the synthetic utility of this cooperative catalytic system. An efficient cooperative chiral Lewis acid and photoredox catalytic system towards the highly enantioselective radical conjugate addition of α-amino radicals to α,β-unsaturated amides is developed with the implementation of unique auxiliaries.![]()
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Affiliation(s)
- Santosh K Pagire
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23, Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23, Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN) 3-14-23, Kamiosaki Shinagawa-ku Tokyo 141-0021 Japan
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37
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Kölmel DK, Ratnayake AS, Flanagan ME, Tsai MH, Duan C, Song C. Photocatalytic [2 + 2] Cycloaddition in DNA-Encoded Chemistry. Org Lett 2020; 22:2908-2913. [PMID: 32239950 DOI: 10.1021/acs.orglett.0c00574] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The on-DNA synthesis of highly substituted cyclobutanes was achieved through a photocatalytic [2 + 2] cycloaddition reaction in aqueous solution. Readily available DNA-tagged styrene derivatives were reacted with structurally diverse cinnamates in the presence of an iridium-based photocatalyst, Ir(ppy)2(dtbbpy)PF6, to forge two new C(sp3)-C(sp3) bonds. This transformation was demonstrated to have excellent functional group tolerance and allowed for the facile installation of a variety of heteroaromatic substituents on a densely functionalized cyclobutane scaffold.
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Affiliation(s)
- Dominik K Kölmel
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, United States
| | - Anokha S Ratnayake
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, United States
| | - Mark E Flanagan
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, United States
| | - Mei-Hsuan Tsai
- HitGen Inc, Building 6, No. 8, Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu City, Sichuan Province P. R. China
| | - Cong Duan
- HitGen Inc, Building 6, No. 8, Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu City, Sichuan Province P. R. China
| | - Chao Song
- HitGen Inc, Building 6, No. 8, Huigu first East Road, Tianfu International Bio-Town, Shuangliu District, Chengdu City, Sichuan Province P. R. China
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38
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Petzold D, Giedyk M, Chatterjee A, König B. A Retrosynthetic Approach for Photocatalysis. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901421] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Daniel Petzold
- Department of Organic Chemistry University of Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Maciej Giedyk
- Department of Organic Chemistry University of Regensburg Universitätsstraße 31 93053 Regensburg Germany
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01‐224 Warsaw Poland
| | - Anamitra Chatterjee
- Department of Organic Chemistry University of Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Burkhard König
- Department of Organic Chemistry University of Regensburg Universitätsstraße 31 93053 Regensburg Germany
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39
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Ishida K, Yamazaki H, Hagiwara C, Abe M, Kusama H. Efficient Generation and Synthetic Applications of Alkyl‐Substituted Siloxycarbenes: Suppression of Norrish‐Type Fragmentations of Alkanoylsilanes by Triplet Energy Transfer. Chemistry 2020; 26:1249-1253. [DOI: 10.1002/chem.201904635] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Kento Ishida
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Hokuto Yamazaki
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Chihiro Hagiwara
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Manabu Abe
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8526 Japan
| | - Hiroyuki Kusama
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
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40
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Wu QA, Chen F, Ren CC, Liu XF, Chen H, Xu LX, Yu XC, Luo SP. Donor–acceptor fluorophores as efficient energy transfer photocatalysts for [2 + 2] photodimerization. Org Biomol Chem 2020; 18:3707-3716. [DOI: 10.1039/c9ob02735a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Donor–acceptor fluorophores can act as efficient energy transfer photocatalysts to activate enone substrates, realizing photodimerization and isomerization reaction of enone substrates without precious metal photocatalysts.
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Affiliation(s)
- Qing-An Wu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Feng Chen
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Chen-Chao Ren
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Xue-Fen Liu
- Qianjiang College
- Hangzhou Normal University
- Hangzhou 310006
- China
| | - Hao Chen
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Liang-Xuan Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Xiao-Cong Yu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Shu-Ping Luo
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
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41
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Schlosser J, Cibulka R, Groß P, Ihmels H, Mohrschladt CJ. Visible‐Light‐Induced Di‐π‐Methane Rearrangement of Dibenzobarrelene Derivatives. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Julika Schlosser
- Department of Chemistry-BiologyUniversity of Siegen Adolf-Reichwein-Str. 2 57068 Siegen Germany
| | - Radek Cibulka
- Department of Organic ChemistryUniversity of Chemistry and Technology, Prague Technická 5 16628 Prague Czech Republic
| | - Philipp Groß
- Department of Chemistry-BiologyUniversity of Siegen Adolf-Reichwein-Str. 2 57068 Siegen Germany
| | - Heiko Ihmels
- Department of Chemistry-BiologyUniversity of Siegen Adolf-Reichwein-Str. 2 57068 Siegen Germany
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42
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Regio- and diastereoselective intermolecular [2+2] cycloadditions photocatalysed by quantum dots. Nat Chem 2019; 11:1034-1040. [PMID: 31654049 PMCID: PMC6820707 DOI: 10.1038/s41557-019-0344-4] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 08/28/2019] [Indexed: 11/13/2022]
Abstract
Light-driven [2+2] cycloaddition is the most direct strategy to build tetrasubstituted cyclobutanes, core components of many lead compounds for drug development. Significant advances in the chemoselectivity and enantioselectivity of [2+2] photocycloadditions have been made, but exceptional and tunable diastereoselectivity and regioselectivity (head-to-head vs. head-to-tail adducts), required for synthesis of bioactive molecules, have not yet been achieved. Here we show that colloidal quantum dots (QDs) serve as visible-light chromophores, photocatalysts, and reusable scaffolds for homo- and hetero-intermolecular [2+2] photocycloadditions of 4-vinylbenzoic acid derivatives, including aryl-conjugated alkenes, with up to 98% switchable regioselectivity and 98% diastereoselectivity for the previously minor syn-cyclobutane products, including the syn-head-to-tail cyclobutane, which has never before been accessed as the major product of a hetero-photocycloaddition. Transient absorption spectroscopy confirms that our system is the first example of catalysis triggered by triplet-triplet energy transfer from a QD. The precisely controlled triplet energy levels of QD photocatalysts facilitate efficient and selective heterocoupling, a major challenge in direct cyclobutane synthesis.
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43
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Huang YM, Wang SM, Leng J, Moku B, Zhao C, Alharbi NS, Qin HL. Converting (E)-(Hetero)arylethanesulfonyl Fluorides to (Z)-(Hetero)arylethanesulfonyl Fluorides Under Light Irradiation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900799] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yu-Mei Huang
- State Key Laboratory of Silicate Materials for Architectures; and; School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Shi-Meng Wang
- State Key Laboratory of Silicate Materials for Architectures; and; School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Jing Leng
- State Key Laboratory of Silicate Materials for Architectures; and; School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Balakrishna Moku
- State Key Laboratory of Silicate Materials for Architectures; and; School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Chuang Zhao
- State Key Laboratory of Silicate Materials for Architectures; and; School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Njud S. Alharbi
- Biotechnology Research group; Department of Biological Sciences; Faculty of Science; King Abdulaziz University; Jeddah Saudi Arabia
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures; and; School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
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44
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Daub ME, Jung H, Lee BJ, Won J, Baik MH, Yoon TP. Enantioselective [2+2] Cycloadditions of Cinnamate Esters: Generalizing Lewis Acid Catalysis of Triplet Energy Transfer. J Am Chem Soc 2019; 141:9543-9547. [PMID: 31145856 DOI: 10.1021/jacs.9b04643] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report the enantioselective [2+2] cycloaddition of simple cinnamate esters, the products of which are useful synthons for the controlled assembly of cyclobutane natural products. This method utilizes a cocatalytic system in which a chiral Lewis acid accelerates the transfer of triplet energy from an excited-state Ir(III) photocatalyst to the cinnamate ester. Computational evidence indicates that the principal role of the Lewis acid cocatalyst is to lower the absolute energies of the substrate frontier molecular orbitals, leading to greater electronic coupling between the sensitizer and substrate and increasing the rate of the energy transfer event. These results suggest Lewis acids can have multiple beneficial effects on triplet sensitization reactions, impacting both the thermodynamic driving force and kinetics of Dexter energy transfer.
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Affiliation(s)
- Mary Elisabeth Daub
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Hoimin Jung
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
| | - Byung Joo Lee
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Joonghee Won
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
| | - Mu-Hyun Baik
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
| | - Tehshik P Yoon
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
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45
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Singh K, Trinh W, Latifi R, Weaver JD. An elusive thermal [2 + 2] cycloaddition driven by visible light photocatalysis: tapping into strain to access C2-symmetric tricyclic rings. Org Biomol Chem 2019; 17:1854-1861. [PMID: 29955745 DOI: 10.1039/c8ob01273c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A mild and operationally simple methodology is reported for the synthesis of cyclobutane rings imbedded within a C2-symmetric tricyclic framework. The method uses visible light and an iridium-based photocatalyst to drive the oft-stated "forbidden" thermal [2 + 2] cycloaddition of cycloheptenes and analogs. Importantly, it generates cyclobutane with four new stereocenters with excellent stereoselectivity, and perfect regioselectivity. The reaction is propelled forward when the photocatalyst absorbs a visible light photon, which transfers this energy to the cycloheptene. Key to success is, upon excitation to the triplet via sensitization from the photocatalyst, the double bond isomerizes to give the transient, highly strained, trans-cycloheptene. The trans-cycloheptene undergoes a strain relieving thermal, intermolecular [π2s + π2a] cycloaddition with another cis-cycloheptene. X-ray analysis reveals that the major product is the head-to-head, C2-symmetric all trans-cyclobutane. Additionally, a dramatic display structural complexity enhancement is observed with the use of chiral cycloheptenols possessing one stereocenter, which results in the formation of cyclobutanes with six contiguous stereocenters with good to excellent diastereocontrol, and can be used to isolate single stereoisomers of stereochemically complex cyclobutanes in good yield.
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Affiliation(s)
- Kamaljeet Singh
- 107 Physical Science, Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
| | - Winston Trinh
- 107 Physical Science, Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
| | - Reza Latifi
- 107 Physical Science, Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
| | - Jimmie D Weaver
- 107 Physical Science, Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
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46
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Ding W, Ho CC, Yoshikai N. Photosensitized, Energy-Transfer-Mediated Cyclization of 2-(1-Arylvinyl)benzaldehydes to Anthracen-9-(10H)-ones. Org Lett 2019; 21:1202-1206. [DOI: 10.1021/acs.orglett.9b00182] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Chang Chin Ho
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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47
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Zhu M, Zheng C, Zhang X, You SL. Synthesis of Cyclobutane-Fused Angular Tetracyclic Spiroindolines via Visible-Light-Promoted Intramolecular Dearomatization of Indole Derivatives. J Am Chem Soc 2019; 141:2636-2644. [PMID: 30653315 DOI: 10.1021/jacs.8b12965] [Citation(s) in RCA: 144] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An intramolecular dearomatization of indole derivatives based on visible-light-promoted [2+2] cycloaddition was achieved via energy transfer mechanism. The highly strained cyclobutane-fused angular tetracyclic spiroindolines, which were typically unattainable under thermal conditions, could be directly accessed in high yields (up to 99%) with excellent diastereoselectivity (>20:1 dr) under mild conditions. The method was also compatible with diverse functional groups and amenable to flexible transformations. In addition, DFT calculations provided guidance on the rational design of substrates and deep understanding of the reaction pathways. This process constituted a rare example of indole functionalization by exploiting visible-light-induced reactivity at the excited states.
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Affiliation(s)
- Min Zhu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China.,School of Physical Science and Technology , ShanghaiTech University , 100 Haike Road , Shanghai 201210 , China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China.,School of Physical Science and Technology , ShanghaiTech University , 100 Haike Road , Shanghai 201210 , China
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48
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Kerres S, Plut E, Malcherek S, Rehbein J, Reiser O. Visible Light‐Mediated Synthesis of Enantiopure γ‐Cyclobutane Amino and 3‐(Aminomethyl)‐5‐phenylpentanoic Acids. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801413] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sabine Kerres
- Institut für Organische ChemieUniversität Regensburg Universitätstrasse 31 93053 Regensburg Germany
| | - Eva Plut
- Institut für Organische ChemieUniversität Regensburg Universitätstrasse 31 93053 Regensburg Germany
| | - Simon Malcherek
- Institut für Organische ChemieUniversität Regensburg Universitätstrasse 31 93053 Regensburg Germany
| | - Julia Rehbein
- Institut für Organische ChemieUniversität Regensburg Universitätstrasse 31 93053 Regensburg Germany
| | - Oliver Reiser
- Institut für Organische ChemieUniversität Regensburg Universitätstrasse 31 93053 Regensburg Germany
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49
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Manguin R, Pichon D, Tarrieu R, Vives T, Roisnel T, Dorcet V, Crévisy C, Miqueu K, Favereau L, Crassous J, Mauduit M, Baslé O. A kinetic resolution strategy for the synthesis of chiral octahedral NHC–iridium(iii) catalysts. Chem Commun (Camb) 2019; 55:6058-6061. [DOI: 10.1039/c9cc02434d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The transmetalation reaction of a chiral-bidentate NHC–silver complex to racemic [lr(μ-Cl)(ppy)2]2 operates with kinetic resolution leading to chiral octahedral NHC–iridium(iii) complexes and enantio-enriched bis-cyclometalated iridium(iii) complexes.
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Affiliation(s)
- Romane Manguin
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
| | - Delphine Pichon
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
| | - Robert Tarrieu
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
| | - Thomas Vives
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
| | | | | | - Christophe Crévisy
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
| | - Karinne Miqueu
- CNRS/Univ. Pau & Pays de l'Adour
- Institut des Sciences Analytiques et de Physico-Chimie pour l’environnement et les Matériaux
- IPREM
- UMR 5254
- Pau
| | | | | | - Marc Mauduit
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
| | - Olivier Baslé
- Univ. Rennes
- Ecole Nationale Supérieure de Chimie de Rennes
- CNRS, ISCR – UMR 6226
- F-35000 Rennes
- France
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50
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Amjaour H, Wang Z, Mabin M, Puttkammer J, Busch S, Chu QR. Scalable preparation and property investigation of a cis-cyclobutane-1,2-dicarboxylic acid from β-trans-cinnamic acid. Chem Commun (Camb) 2018; 55:214-217. [PMID: 30520915 DOI: 10.1039/c8cc08017h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Scalable synthesis of β-truxinic acid (CBDA-4) was accomplished by capturing and photodimerizing a metastable crystalline solid of trans-cinnamic acid. This synthetic approach builds a foundation for investigating the properties and applications of the useful diacid. The X-ray crystal structure of CBDA-4 was determined for the first time. The cyclobutane ring in CBDA-4 was cleaved upon heating, making it a promising building block for thermally recyclable/degradable materials.
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Affiliation(s)
- Houssein Amjaour
- Department of Chemistry, University of North Dakota, Grand Forks, ND 58202, USA.
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