301
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Yin Y, Dai Y, Jia H, Li J, Bu L, Qiao B, Zhao X, Jiang Z. Conjugate Addition-Enantioselective Protonation of N-Aryl Glycines to α-Branched 2-Vinylazaarenes via Cooperative Photoredox and Asymmetric Catalysis. J Am Chem Soc 2018; 140:6083-6087. [PMID: 29634250 DOI: 10.1021/jacs.8b01575] [Citation(s) in RCA: 175] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An enantioselective protonation strategy has been successfully applied to the synthesis of chiral α-tertiary azaarenes. With a dual catalytic system involving a chiral phosphoric acid and a dicyanopyrazine-derived chromophore (DPZ) photosensitizer that is mediated by visible light, a variety of α-branched 2-vinylpyridines and 2-vinylquinolines with N-aryl glycines underwent a redox-neutral, radical conjugate addition-protonation process and provided valuable chiral 3-(2-pyridine/quinoline)-3-substituted amines in high yields with good to excellent enantioselectivities (up to >99% ee). An application of this methodology to a two-step synthesis of the enantiomerically pure medicinal compound pheniramine (Avil) is also presented.
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Affiliation(s)
- Yanli Yin
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004.,College of Bioengineering , Henan University of Technology , Zhengzhou , Henan , P. R. of China 450001
| | - Yating Dai
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
| | - Hongshao Jia
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
| | - Jiangtao Li
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
| | - Liwei Bu
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
| | - Baokun Qiao
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng , Henan , P. R. China 475004
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302
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Wang Y, Wen X, Cui X, Zhang XP. Enantioselective Radical Cyclization for Construction of 5-Membered Ring Structures by Metalloradical C-H Alkylation. J Am Chem Soc 2018; 140:4792-4796. [PMID: 29584958 PMCID: PMC5905427 DOI: 10.1021/jacs.8b01662] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Radical cyclization represents a powerful strategy for construction of ring structures. Traditional radical cyclization, which is based on radical addition as the key step, necessitates the use of unsaturated substrates. Guided by the concept of metalloradical catalysis, a different mode of radical cyclization that can employ saturated C-H substrates is demonstrated through the development of a Co(II)-based system for catalytic activation of aliphatic diazo compounds for enantioselective radical alkylation of various C(sp3)-H bonds. It allows for efficient construction of chiral pyrrolidines and other valuable 5-membered cyclic compounds. This alternative strategy of radical cyclization provides a new retrosynthetic paradigm to prepare five-membered cyclic molecules from readily available open-chain aldehydes through the union of C-H and C=O elements for C-C bond formation.
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Affiliation(s)
- Yong Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xin Wen
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xin Cui
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
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303
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Huang X, Lin J, Shen T, Harms K, Marchini M, Ceroni P, Meggers E. Asymmetric [3+2] Photocycloadditions of Cyclopropanes with Alkenes or Alkynes through Visible-Light Excitation of Catalyst-Bound Substrates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802316] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Xiaoqiang Huang
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Jiahui Lin
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Tianqi Shen
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Klaus Harms
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Marianna Marchini
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; 40126 Bologna Italy
| | - Paola Ceroni
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; 40126 Bologna Italy
| | - Eric Meggers
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
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304
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Huang X, Lin J, Shen T, Harms K, Marchini M, Ceroni P, Meggers E. Asymmetric [3+2] Photocycloadditions of Cyclopropanes with Alkenes or Alkynes through Visible-Light Excitation of Catalyst-Bound Substrates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201802316] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Xiaoqiang Huang
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Jiahui Lin
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Tianqi Shen
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Klaus Harms
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Marianna Marchini
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; 40126 Bologna Italy
| | - Paola Ceroni
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; 40126 Bologna Italy
| | - Eric Meggers
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
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305
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Hou J, Ee A, Feng W, Xu JH, Zhao Y, Wu J. Visible-Light-Driven Alkyne Hydro-/Carbocarboxylation Using CO 2 via Iridium/Cobalt Dual Catalysis for Divergent Heterocycle Synthesis. J Am Chem Soc 2018; 140:5257-5263. [PMID: 29596743 DOI: 10.1021/jacs.8b01561] [Citation(s) in RCA: 139] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We present herein the first visible-light-driven hydrocarboxylation as well as carbocarboxylation of alkynes using CO2 via an iridium/cobalt dual catalysis. Such transformations provide access to various pharmaceutically important heterocycles in a one-pot procedure from readily available alkynes. Coumarins, 2-quinolones, and 2-benzoxepinones were directly accessed through a one-pot alkyne hydrocarboxylation/alkene isomerization/cyclization sequence in which the Ir photocatalyst serves a dual role to promote single-electron transfer in alkyne hydrocarboxylation and energy transfer in the subsequent alkene isomerization. Moreover, an unprecedented cobalt carboxylation/acyl migration cascade enables alkyne difunctionalization to introduce γ-hydroxybutenolides with high efficiency. We expect that this cascade strategy will inspire new perspectives for alkyne and alkene difunctionalization.
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Affiliation(s)
- Jing Hou
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Republic of Singapore 117543
| | - Aloysius Ee
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Republic of Singapore 117543
| | - Wei Feng
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Republic of Singapore 117543
| | - Jin-Hui Xu
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Republic of Singapore 117543
| | - Yu Zhao
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Republic of Singapore 117543
| | - Jie Wu
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Republic of Singapore 117543
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306
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307
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Hou H, Zhu S, Atodiresei I, Rueping M. Asymmetric Organocatalysis and Photoredox Catalysis for the α-Functionalization of Tetrahydroisoquinolines. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800117] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hong Hou
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
- School of chemistry and chemical engineering; Yangzhou University; 225009 Yangzhou P. R. China
| | - Shaoqun Zhu
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Iuliana Atodiresei
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
- KAUST; King Abdullah University of Science and Technology (KAUST); 6900 Catalysis Center (KCC) Saudi Arabia
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308
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Shao T, Yin Y, Lee R, Zhao X, Chai G, Jiang Z. Sequential Photoredox Catalysis for Cascade Aerobic Decarboxylative Povarov and Oxidative Dehydrogenation Reactions of N
-Aryl α-Amino Acids. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800135] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tianju Shao
- Key Laboratory of Natural Medicine and Immuno-Engineering; Henan University; Kaifeng, Henan People's Republic of China 475004
| | - Yanli Yin
- Key Laboratory of Natural Medicine and Immuno-Engineering; Henan University; Kaifeng, Henan People's Republic of China 475004
- College of Bioengineering; Henan University of Technology; Zhengzhou 450001 People's Republic of China
| | - Richmond Lee
- Singapore University of Technology and Design; 8 Somapah Road Singapore 487372
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering; Henan University; Kaifeng, Henan People's Republic of China 475004
| | - Guobi Chai
- Key Laboratory of Tobacco Flavor Basic Research of CNTC; Zhengzhou Tobacco Research Institute of CNTC; Zhengzhou 450001 People's Republic of China
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering; Henan University; Kaifeng, Henan People's Republic of China 475004
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309
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Zou YQ, Hörmann FM, Bach T. Iminium and enamine catalysis in enantioselective photochemical reactions. Chem Soc Rev 2018; 47:278-290. [PMID: 29155908 PMCID: PMC5789435 DOI: 10.1039/c7cs00509a] [Citation(s) in RCA: 180] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The rapidly growing area of iminium and enamine catalysis in enantioselective photochemistry is reviewed, with an emphasis on catalytic modes and reaction types.
Although enantioselective catalysis under thermal conditions has been well established over the last few decades, the enantioselective catalysis of photochemical reactions is still a challenging task resulting from the complex enantiotopic face differentiation in the photoexcited state. Recently, remarkable achievements have been reported by a synergistic combination of organocatalysis and photocatalysis, which have led to the expedient construction of a diverse range of enantioenriched molecules which are generally not easily accessible under thermal conditions. In this tutorial review, we summarize and highlight the most significant advances in iminium and enamine catalysis of enantioselective photochemical reactions, with an emphasis on catalytic modes and reaction types.
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Affiliation(s)
- You-Quan Zou
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany.
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310
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Rao M, Kanagaraj K, Fan C, Ji J, Xiao C, Wei X, Wu W, Yang C. Photocatalytic Supramolecular Enantiodifferentiating Dimerization of 2-Anthracenecarboxylic Acid through Triplet–Triplet Annihilation. Org Lett 2018; 20:1680-1683. [DOI: 10.1021/acs.orglett.8b00520] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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311
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Zhang T, Liang W, Huang Y, Li X, Liu Y, Yang B, He C, Zhou X, Zhang J. Bifunctional organic sponge photocatalyst for efficient cross-dehydrogenative coupling of tertiary amines to ketones. Chem Commun (Camb) 2018; 53:12536-12539. [PMID: 29109986 DOI: 10.1039/c7cc06997a] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel bifunctional organic sponge photocatalyst can enable the efficient coupling of tertiary amines with ketones in water. The asymmetric transformation can be also achieved by using this sponge photocatalyst.
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Affiliation(s)
- Teng Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
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312
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Preparation of chiral-at-metal catalysts and their use in asymmetric photoredox chemistry. Nat Protoc 2018; 13:605-632. [PMID: 29494576 DOI: 10.1038/nprot.2017.138] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Asymmetric catalysis is a powerful approach for the synthesis of optically active compounds, and visible light constitutes an abundant source of energy to enable chemical transformations, which are often triggered by photoinduced electron transfer (photoredox chemistry). Recently, bis-cyclometalated iridium(III) and rhodium(III) complexes were introduced as a novel class of catalysts for combining asymmetric catalysis with visible-light-induced photoredox chemistry. These catalysts are attractive because of their unusual feature of chirality originating exclusively from a stereogenic metal center, which offers the prospect of an especially effective asymmetric induction upon direct coordination of the substrate to the metal center. As these chiral catalysts contain only achiral ligands, special strategies are required for their synthesis. In this protocol, we describe strategies for preparing two types of chiral-at-metal catalysts, namely the Λ- and Δ-enantiomers (left- and right-handed propellers, respectively) of the iridium complex IrS and the rhodium complex RhS. Both contain two cyclometalating 5-tert-butyl-2-phenylbenzothiazoles in addition to two acetonitrile ligands and a hexafluorophosphate counterion. The two cyclometalated ligands set the propeller-shaped chiral geometry, but the acetonitriles are labile and can be replaced by substrate molecules. The synthesis protocol consists of three stages: first, preparation of the ligand 5-tert-butyl-2-phenylbenzothiazole; second, preparation of salicylthiazoline (used for iridium) and salicyloxazoline (used for rhodium) chiral auxiliaries; and third, the auxiliary-mediated synthesis of the individual enantiopure Λ- and Δ-configured catalysts. This class of stereogenic-only-at-metal complexes is of substantial value in the field of asymmetric catalysis, offering stereocontrolled radical reactions based on visible-light-activated photoredox chemistry. Representative examples of visible-light-induced asymmetric catalysis are provided.
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313
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Li M, Sang Y, Xue XS, Cheng JP. Origin of Stereocontrol in Photoredox Organocatalysis of Asymmetric α-Functionalizations of Aldehydes. J Org Chem 2018; 83:3333-3338. [DOI: 10.1021/acs.joc.8b00469] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Man Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Yueqian Sang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Xiao-Song Xue
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
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314
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Poplata S, Bach T. Enantioselective Intermolecular [2+2] Photocycloaddition Reaction of Cyclic Enones and Its Application in a Synthesis of (-)-Grandisol. J Am Chem Soc 2018; 140:3228-3231. [PMID: 29458250 PMCID: PMC5849358 DOI: 10.1021/jacs.8b01011] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The
intermolecular [2+2] photocycloaddition of typical cyclic α,β-unsaturated
enones, such as 2-cyclohexenone, with olefins was performed in moderate
to good yields (42–82%) and with high enantioselectivity (82%–96% ee). An unusual substitution pattern at the chiral oxazaborolidine-AlBr3 Lewis acid complex that promotes the reaction was found to
be crucial for the success of the reaction. The method was applied
to the enantioselective synthesis of the monoterpene (−)-grandisol,
which could be accomplished in six steps and with an overall yield
of 13% starting from 3-methyl-2-cyclohexenone.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis Research Center (CRC) , Technische Universität München , Lichtenbergstrasse 4 , 85747 Garching , Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC) , Technische Universität München , Lichtenbergstrasse 4 , 85747 Garching , Germany
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315
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Molloy JJ, Metternich JB, Daniliuc CG, Watson AJB, Gilmour R. Contra-Thermodynamic, Photocatalytic E
→Z
Isomerization of Styrenyl Boron Species: Vectors to Facilitate Exploration of Two-Dimensional Chemical Space. Angew Chem Int Ed Engl 2018; 57:3168-3172. [DOI: 10.1002/anie.201800286] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Indexed: 01/13/2023]
Affiliation(s)
- John J. Molloy
- WESTCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow UK
| | - Jan B. Metternich
- Organisch Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
- Current address: Department of Chemistry and Chemical Biology; Harvard University; 12 Oxford Street Cambridge MA 02138 USA
| | - Constantin G. Daniliuc
- Organisch Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
| | - Allan J. B. Watson
- EASTCHEM School of Chemistry; University of St Andrews, North Haugh; St Andrews, Fife UK
| | - Ryan Gilmour
- Organisch Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
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316
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Molloy JJ, Metternich JB, Daniliuc CG, Watson AJB, Gilmour R. Contra-Thermodynamic, Photocatalytic E
→Z
Isomerization of Styrenyl Boron Species: Vectors to Facilitate Exploration of Two-Dimensional Chemical Space. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800286] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- John J. Molloy
- WESTCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow UK
| | - Jan B. Metternich
- Organisch Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
- Current address: Department of Chemistry and Chemical Biology; Harvard University; 12 Oxford Street Cambridge MA 02138 USA
| | - Constantin G. Daniliuc
- Organisch Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
| | - Allan J. B. Watson
- EASTCHEM School of Chemistry; University of St Andrews, North Haugh; St Andrews, Fife UK
| | - Ryan Gilmour
- Organisch Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Münster Germany
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317
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Wei X, Wu W, Matsushita R, Yan Z, Zhou D, Chruma JJ, Nishijima M, Fukuhara G, Mori T, Inoue Y, Yang C. Supramolecular Photochirogenesis Driven by Higher-Order Complexation: Enantiodifferentiating Photocyclodimerization of 2-Anthracenecarboxylate to Slipped Cyclodimers via a 2:2 Complex with β-Cyclodextrin. J Am Chem Soc 2018; 140:3959-3974. [PMID: 29437396 DOI: 10.1021/jacs.7b12085] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chiral slipped 5,8:9',10'-cyclodimers were preferentially produced over classical 9,10:9',10'-cyclodimers upon supramolecular photocyclodimerization of 2-anthracenecarboxylate (AC) mediated by β-cyclodextrin (β-CD). This photochirogenic route to the slipped cyclodimers, exclusively head-to-tail (HT) and highly enantioselective, has long been overlooked in foregoing studies but is dominant in reality and is absolutely supramolecularly activated by 2:2 complexation of AC with β-CD. The intricate structural and photophysical aspects of this higher-order complexation-triggered process have been comprehensively elucidated, while the absolute configurations of the slipped cyclodimers have been unambiguously assigned by comparing the experimental and theoretical circular dichroism spectra. In the 2:2 complex, two ACs packed in a dual β-CD capsule are not fully overlapped with each other but are only partially stacked in a slipped anti- or syn-HT manner. Hence, they do not spontaneously cyclodimerize upon photoexcitation but instead emit long-lived excimer fluorescence at wavelengths slightly longer than the monomer fluorescence, indicating that the slipped excimer is neither extremely reactive nor completely relaxed in conformation and energy. Because of the slipped conformation of the AC pair in the soft capsule, the subsequent photocyclodimerization becomes manipulable by various internal or external factors, such as temperature, pressure, added salt, and host modification, enabling us to exclusively obtain the slipped cyclodimers with high regio- and enantioselectivities. In this supramolecularly driven photochirogenesis, the dual β-CD capsule functions as a chiral organophotocatalyst to trigger and accelerate the nonclassical photochirogenic route to slipped cyclodimers by preorganizing the conformation of the encapsulated AC pair, formally mimicking a catalytic antibody.
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Affiliation(s)
| | | | | | | | - Dayang Zhou
- Comprehensive Analysis Center, ISIR , Osaka University , Mihogaoka , Ibaraki 567-0047 , Japan
| | | | | | - Gaku Fukuhara
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku , Tokyo 152-8551 , Japan
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318
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Morack T, Metternich JB, Gilmour R. Vitamin Catalysis: Direct, Photocatalytic Synthesis of Benzocoumarins via (−)-Riboflavin-Mediated Electron Transfer. Org Lett 2018; 20:1316-1319. [DOI: 10.1021/acs.orglett.8b00052] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tobias Morack
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Jan B. Metternich
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
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319
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Burns AS, Ross CC, Rychnovsky SD. Heteroatom-Directed Acylation of Secondary Alcohols To Assign Absolute Configuration. J Org Chem 2018; 83:2504-2515. [PMID: 29424546 DOI: 10.1021/acs.joc.7b03156] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Birman's HBTM catalyst is effective for the enantioselective acylation and kinetic resolution of benzylic secondary alcohols. The enantioselective acylation has now been extended to secondary alcohols bearing electron-withdrawing groups such as halides and other heteroatoms. The level of selectivity is modest to good and is sufficient for determining configuration using the competing enantioselective conversion method. A mathematical analysis identifies conditions for achieving maximum differences in conversion and, consequently, assigning configuration with greater confidence. The new method is effective for halohydrins and secondary-tertiary 1,2-diols and was used to confirm the configuration of two inoterpene natural products.
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Affiliation(s)
- Alexander S Burns
- Department of Chemistry, 1102 Natural Sciences II, University of California at Irvine , Irvine, California 92697, United States
| | - Christopher C Ross
- Department of Chemistry, 1102 Natural Sciences II, University of California at Irvine , Irvine, California 92697, United States
| | - Scott D Rychnovsky
- Department of Chemistry, 1102 Natural Sciences II, University of California at Irvine , Irvine, California 92697, United States
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320
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Guo W, Zhao M, Tan W, Zheng L, Tao K, Liu L, Wang X, Chen D, Fan X. Visible Light-Promoted Three-Component Tandem Annulation for the Synthesis of 2-Iminothiazolidin-4-ones. J Org Chem 2018; 83:1402-1413. [DOI: 10.1021/acs.joc.7b02940] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei Guo
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Mingming Zhao
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wen Tan
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lvyin Zheng
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Kailiang Tao
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lingxiu Liu
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xinyu Wang
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Deliang Chen
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaolin Fan
- Key Laboratory
of Organo-pharmaceutical
Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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321
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Zhang Z, Ratnikov M, Spraggon G, Alper PB. Photoinduced Rearrangement of Dienones and Santonin Rerouted by Amines. Angew Chem Int Ed Engl 2018; 57:904-908. [PMID: 29266649 DOI: 10.1002/anie.201710463] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/28/2017] [Indexed: 11/06/2022]
Abstract
The photoinduced rearrangement pathways of simple 2,5-dienones and the natural product santonin were found to be effectively rerouted by amines, giving rise to unprecedented products. Either cis olefins or cyclobutenes were obtained from 4,4-disubstituted 2,5-dienone upon irradiation (365 nm) in the presence of various amines depending on the solvent. Previously undescribed [4.4.0] and [5.3.0] fused-ring-containing products were obtained when santonin was irradiated (365 nm) in the presence of methylamine. The amines present in these reactions were incorporated into the products by means of amide-group formation.
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Affiliation(s)
- Zhipeng Zhang
- Department of Discovery Chemistry, Genomics Institute of the Novartis Research Foundation, San Diego, CA, 92121, USA
| | - Maxim Ratnikov
- Department of Discovery Chemistry, Genomics Institute of the Novartis Research Foundation, San Diego, CA, 92121, USA
| | - Glen Spraggon
- Department of Discovery Chemistry, Genomics Institute of the Novartis Research Foundation, San Diego, CA, 92121, USA
| | - Phil B Alper
- Department of Discovery Chemistry, Genomics Institute of the Novartis Research Foundation, San Diego, CA, 92121, USA
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322
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Woźniak Ł, Magagnano G, Melchiorre P. Enantioselective Photochemical Organocascade Catalysis. Angew Chem Int Ed Engl 2018; 57:1068-1072. [PMID: 29205718 PMCID: PMC5814823 DOI: 10.1002/anie.201711397] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 11/26/2017] [Indexed: 12/18/2022]
Abstract
Reported herein is a photochemical cascade process that combines the excited-state and ground-state reactivity of chiral organocatalytic intermediates. This strategy directly converts racemic cyclopropanols and α,β-unsaturated aldehydes into stereochemically dense cyclopentanols with exquisite stereoselectivity. Mechanistic investigations have enabled elucidating the origin of the stereoconvergence, which is governed by a kinetic resolution process.
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Affiliation(s)
- Łukasz Woźniak
- ICIQ—Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and TechnologyAvenida Països Catalans 1643007TarragonaSpain
| | - Giandomenico Magagnano
- ICIQ—Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and TechnologyAvenida Països Catalans 1643007TarragonaSpain
| | - Paolo Melchiorre
- ICREA—Catalan Institution for Research and Advanced StudiesPasseig Lluís Companys 2308010BarcelonaSpain
- ICIQ—Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and TechnologyAvenida Països Catalans 1643007TarragonaSpain
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323
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Zhang Z, Ratnikov M, Spraggon G, Alper PB. Photoinduced Rearrangement of Dienones and Santonin Rerouted by Amines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhipeng Zhang
- Department of Discovery Chemistry; Genomics Institute of the Novartis Research Foundation; San Diego CA 92121 USA
| | - Maxim Ratnikov
- Department of Discovery Chemistry; Genomics Institute of the Novartis Research Foundation; San Diego CA 92121 USA
| | - Glen Spraggon
- Department of Discovery Chemistry; Genomics Institute of the Novartis Research Foundation; San Diego CA 92121 USA
| | - Phil B. Alper
- Department of Discovery Chemistry; Genomics Institute of the Novartis Research Foundation; San Diego CA 92121 USA
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324
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Liu J, Ding W, Zhou QQ, Liu D, Lu LQ, Xiao WJ. Enantioselective Di-/Perfluoroalkylation of β-Ketoesters Enabled by Cooperative Photoredox/Nickel Catalysis. Org Lett 2018; 20:461-464. [PMID: 29313355 DOI: 10.1021/acs.orglett.7b03826] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Efficient and enantioselective radical difluoroalkylation and perfluoroalkylation reactions of β-ketoesters were successfully developed through an asymmetric photoredox and nickel catalysis cascade. This protocol provides Rf-containing quaternary stereocenters in up to 67% yield and 95:5 er with ethyl iododifluoroacetate and perfluoroalkyl iodides (C3F7I and C4F9I) as radical sources under extremely mild conditions.
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Affiliation(s)
- Jing Liu
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Wei Ding
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Quan-Quan Zhou
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Dan Liu
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Liang-Qiu Lu
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Wen-Jing Xiao
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, China
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325
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Itoh K, Tokunaga K, Fujii H, Suga H, Matsuura J, Kamiya H, Kudo R, Takahashi Y, Hashimoto Y, Yoza K. Lewis Acid Catalysis in Intermolecular [2+2] Photocycloaddition of Coumarin-3-carboxamide Bearing 2-Oxazolidinone Auxiliary with n-Propyl Vinyl Ether and Vinyl Pivalate. HETEROCYCLES 2018. [DOI: 10.3987/com-18-s(t)44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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326
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Mateos J, Cherubini-Celli A, Carofiglio T, Bonchio M, Marino N, Companyó X, Dell’Amico L. A microfluidic photoreactor enables 2-methylbenzophenone light-driven reactions with superior performance. Chem Commun (Camb) 2018; 54:6820-6823. [DOI: 10.1039/c8cc01373j] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A general and scalable microfluidic photoreactor for light-driven reaction of 2-methylbenzophenones was successfully developed.
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Affiliation(s)
- Javier Mateos
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
| | - Alessio Cherubini-Celli
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
| | - Tommaso Carofiglio
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
| | - Marcella Bonchio
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
| | - Nadia Marino
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
| | - Xavier Companyó
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
| | - Luca Dell’Amico
- Dipartimento di Scienze Chimiche and ITM-CNR UoS of Padova
- Università di Padova
- 35131 Padova
- Italy
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327
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Abstract
Synergistic utilization of TiO2-photo-generated holes and electrons is a potential protocol for catalytic C–C bond formation reactions.
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Affiliation(s)
- Dongge Ma
- School of Science
- Beijing Technology and Business University
- Beijing
- P. R. China
| | - Anan Liu
- Key Laboratory of Photochemistry
- Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Shuhong Li
- School of Science
- Beijing Technology and Business University
- Beijing
- P. R. China
| | - Chichong Lu
- School of Science
- Beijing Technology and Business University
- Beijing
- P. R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry
- Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
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328
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Zhao YN, Luo YC, Wang ZY, Xu PF. A new approach to access difluoroalkylated diarylmethanes via visible-light photocatalytic cross-coupling reactions. Chem Commun (Camb) 2018; 54:3993-3996. [DOI: 10.1039/c8cc01486h] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A para-quinone methide and difluoroalkylating reagent involved radical cross-coupling reaction was described, through photocatalytically generated diarylmethane radical intermediates.
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Affiliation(s)
- Yin-Na Zhao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Zhu-Yin Wang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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329
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Wang L, Rörich I, Ramanan C, Blom PWM, Huang W, Li R, Zhang KAI. Electron donor-free photoredox catalysis via an electron transfer cascade by cooperative organic photocatalysts. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01072b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electron transfer cascade in cooperative organic photocatalysts can prevent the use of sacrificial reagent for photoredox catalysis.
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Affiliation(s)
- Lei Wang
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Irina Rörich
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | | | | | - Wei Huang
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Run Li
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
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330
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Woźniak Ł, Magagnano G, Melchiorre P. Enantioselective Photochemical Organocascade Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711397] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Łukasz Woźniak
- ICIQ-Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology; Avenida Països Catalans 16 43007 Tarragona Spain
| | - Giandomenico Magagnano
- ICIQ-Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology; Avenida Països Catalans 16 43007 Tarragona Spain
| | - Paolo Melchiorre
- ICREA-Catalan Institution for Research and Advanced Studies; Passeig Lluís Companys 23 08010 Barcelona Spain
- ICIQ-Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology; Avenida Països Catalans 16 43007 Tarragona Spain
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331
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Hörmann FM, Chung TS, Rodriguez E, Jakob M, Bach T. Evidence for Triplet Sensitization in the Visible-Light-Induced [2+2] Photocycloaddition of Eniminium Ions. Angew Chem Int Ed Engl 2017; 57:827-831. [PMID: 29178574 PMCID: PMC5768022 DOI: 10.1002/anie.201710441] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Indexed: 11/08/2022]
Abstract
Εniminium ions were prepared from the corresponding α,β-unsaturated carbonyl compounds (enones and enals), and were found to be promoted to their respective triplet states by energy transfer. The photoexcited intermediates underwent intra- or intermolecular [2+2] photocycloaddition in good yields (50-78 %) upon irradiation at λ=433 nm or λ=457 nm. Iridium or ruthenium complexes with a sufficiently high triplet energy were identified as efficient catalysts (2.5 mol % catalyst loading) for the reaction. The intermolecular [2+2] photocycloaddition of an eniminium ion derived from a chiral secondary amine proceeded with high enantioselectivity (88 % ee).
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Affiliation(s)
- Fabian M Hörmann
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Tim S Chung
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Elsa Rodriguez
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Matthias Jakob
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Thorsten Bach
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
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332
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Hörmann FM, Chung TS, Rodriguez E, Jakob M, Bach T. Hinweise auf eine Triplett‐Sensibilisierung in der [2+2]‐Photocycloaddition von Eniminiumionen mit sichtbarem Licht. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710441] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fabian M. Hörmann
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Tim S. Chung
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Elsa Rodriguez
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Matthias Jakob
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Thorsten Bach
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
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333
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Zhou R, Goh YY, Liu H, Tao H, Li L, Wu J. Visible-Light-Mediated Metal-Free Hydrosilylation of Alkenes through Selective Hydrogen Atom Transfer for Si−H Activation. Angew Chem Int Ed Engl 2017; 56:16621-16625. [DOI: 10.1002/anie.201711250] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Rong Zhou
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 China
| | - Yi Yiing Goh
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Haiwang Liu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Hairong Tao
- College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Lihua Li
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Jie Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
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334
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Zhou R, Goh YY, Liu H, Tao H, Li L, Wu J. Visible-Light-Mediated Metal-Free Hydrosilylation of Alkenes through Selective Hydrogen Atom Transfer for Si−H Activation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711250] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rong Zhou
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 China
| | - Yi Yiing Goh
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Haiwang Liu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Hairong Tao
- College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Lihua Li
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Jie Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
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335
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Skubi KL, Kidd JB, Jung H, Guzei IA, Baik MH, Yoon TP. Enantioselective Excited-State Photoreactions Controlled by a Chiral Hydrogen-Bonding Iridium Sensitizer. J Am Chem Soc 2017; 139:17186-17192. [PMID: 29087702 DOI: 10.1021/jacs.7b10586] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Stereochemical control of electronically excited states is a long-standing challenge in photochemical synthesis, and few catalytic systems that produce high enantioselectivities in triplet-state photoreactions are known. We report herein an exceptionally effective chiral photocatalyst that recruits prochiral quinolones using a series of hydrogen-bonding and π-π interactions. The organization of these substrates within the chiral environment of the transition-metal photosensitizer leads to efficient Dexter energy transfer and effective stereoinduction. The relative insensitivity of these organometallic chromophores toward ligand modification enables the optimization of this catalyst structure for high enantiomeric excess at catalyst loadings as much as 100-fold lower than the optimal conditions reported for analogous chiral organic photosensitizers.
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Affiliation(s)
- Kazimer L Skubi
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jesse B Kidd
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Hoimin Jung
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141, Republic of Korea
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141, Republic of Korea
| | - Tehshik P Yoon
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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336
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Li G, Lou HX. Strategies to diversify natural products for drug discovery. Med Res Rev 2017; 38:1255-1294. [PMID: 29064108 DOI: 10.1002/med.21474] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 09/18/2017] [Accepted: 09/28/2017] [Indexed: 12/11/2022]
Abstract
Natural product libraries contain specialized metabolites derived from plants, animals, and microorganisms that play a pivotal role in drug discovery due to their immense structural diversity and wide variety of biological activities. The strategies to greatly extend natural product scaffolds through available biological and chemical approaches offer unique opportunities to access a new series of natural product analogues, enabling the construction of diverse natural product-like libraries. The affordability of these structurally diverse molecules has been a crucial step in accelerating drug discovery. This review provides an overview of various approaches to exploit the diversity of compounds for natural product-based drug development, drawing upon a series of examples to illustrate each strategy.
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Affiliation(s)
- Gang Li
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Hong-Xiang Lou
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China.,Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, China
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337
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Fan J, Wang T, Li C, Wang R, Lei X, Liang Y, Zhang Z. Synthesis of Benzoaryl-5-yl(2-hydroxyphenyl)methanones via Photoinduced Rearrangement of (E)-3-Arylvinyl-4H-chromen-4-ones. Org Lett 2017; 19:5984-5987. [DOI: 10.1021/acs.orglett.7b03007] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jinming Fan
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
| | - Tao Wang
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
| | - Chenchen Li
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
| | - Rui Wang
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
| | - Xiaoyu Lei
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
| | - Yong Liang
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
| | - Zunting Zhang
- Key Laboratory of the Ministry
of Education for Medicinal Resources and Natural Pharmaceutical Chemistry,
National Engineering Laboratory for Resource Development of Endangered
Crude Drugs in Northwest of China, and School of Chemistry and Chemical
Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China
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338
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Chen K, Liu S, Wang D, Hao WJ, Zhou P, Tu SJ, Jiang B. Silver/Scandium-Cocatalyzed Bicyclization of β-Alkynyl Ketones Leading to Benzo[c]xanthenes and Naphtho[1,2-b]benzofurans. J Org Chem 2017; 82:11524-11530. [DOI: 10.1021/acs.joc.7b02134] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ke Chen
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Shuai Liu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Dan Wang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Peng Zhou
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
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339
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Lin L, Bai X, Ye X, Zhao X, Tan CH, Jiang Z. Organocatalytic Enantioselective Protonation for Photoreduction of Activated Ketones and Ketimines Induced by Visible Light. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707899] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lu Lin
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province; Henan University; Jinming Campus Kaifeng Henan 475004 P.R. China
| | - Xiangbin Bai
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province; Henan University; Jinming Campus Kaifeng Henan 475004 P.R. China
| | - Xinyi Ye
- Division of Chemistry and Biological Chemistry; Nanyang Technological University; 21 Nanyang Link 637371 Singapore
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province; Henan University; Jinming Campus Kaifeng Henan 475004 P.R. China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry; Nanyang Technological University; 21 Nanyang Link 637371 Singapore
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province; Henan University; Jinming Campus Kaifeng Henan 475004 P.R. China
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340
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Lin L, Bai X, Ye X, Zhao X, Tan CH, Jiang Z. Organocatalytic Enantioselective Protonation for Photoreduction of Activated Ketones and Ketimines Induced by Visible Light. Angew Chem Int Ed Engl 2017; 56:13842-13846. [PMID: 28925022 DOI: 10.1002/anie.201707899] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/04/2017] [Indexed: 12/23/2022]
Abstract
The first catalytic asymmetric photoreduction of 1,2-diketones and α-keto ketimines under visible light irradiation is reported. A transition-metal-free synergistic catalysis platform harnessing dicyanopyrazine-derived chromophore (DPZ) as the photoredox catalyst and a non-covalent chiral organocatalyst is effective for these transformations. With the flexible use of a chiral Brønsted acid or base in H+ transfer interchange to control the elusive enantioselective protonation, a variety of chiral α-hydroxy ketones and α-amino ketones were obtained with high yields and enantioselectivities.
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Affiliation(s)
- Lu Lin
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Jinming Campus, Kaifeng, Henan, 475004, P.R. China
| | - Xiangbin Bai
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Jinming Campus, Kaifeng, Henan, 475004, P.R. China
| | - Xinyi Ye
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Jinming Campus, Kaifeng, Henan, 475004, P.R. China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Jinming Campus, Kaifeng, Henan, 475004, P.R. China
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341
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Cuadros S, Dell'Amico L, Melchiorre P. Forging Fluorine-Containing Quaternary Stereocenters by a Light-Driven Organocatalytic Aldol Desymmetrization Process. Angew Chem Int Ed Engl 2017; 56:11875-11879. [PMID: 28746742 PMCID: PMC5638065 DOI: 10.1002/anie.201706763] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 07/25/2017] [Indexed: 01/05/2023]
Abstract
Reported herein is a light-triggered organocatalytic strategy for the desymmetrization of achiral 2-fluoro-substituted cyclopentane-1,3-diketones. The chemistry is based on an intermolecular aldol reaction of photochemically generated hydroxy-o-quinodimethanes and simultaneously forges two adjacent fully substituted carbon stereocenters, with one bearing a stereogenic carbon-fluorine unit. The method uses readily available substrates, a simple chiral organocatalyst, and mild reaction conditions to afford an array of highly functionalized chiral 2-fluoro-3-hydroxycyclopentanones.
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Affiliation(s)
- Sara Cuadros
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and TechnologyAvenida Països Catalans 1643007TarragonaSpain
| | - Luca Dell'Amico
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and TechnologyAvenida Països Catalans 1643007TarragonaSpain
| | - Paolo Melchiorre
- ICREA—Catalan Institution for Research and Advanced StudiesPasseig Lluís Companys 2308010BarcelonaSpain
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and TechnologyAvenida Països Catalans 1643007TarragonaSpain
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342
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Adiyala PR, Sastry KNV, Kovvuri J, Nagarajan A, Reddy VG, Sayeed IB, Nayak VL, Maurya RA, Kamal A. Visible Light Driven Coupling of 2-aminopyridines and α-Keto Vinyl Azides for the Synthesis of Imidazo[1, 2-a
]pyridines and Their Cytotoxicity. ChemistrySelect 2017. [DOI: 10.1002/slct.201700952] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Praveen Reddy Adiyala
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Kasinathuni Naga Visweswara Sastry
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad-500 037 India
| | - Jeshma Kovvuri
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Apoorva Nagarajan
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Velma Ganga Reddy
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Ibrahim Bin Sayeed
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Vedinthe Lakshma Nayak
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group; Chemical Science & Technology Division; CSIR-North East Institute of Science and Technology; Jorhat Assam-785006 India
| | - Ahmed Kamal
- Medicinal Chemistry & Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad-500 037 India
- Catalytic Chemistry Research Chair; Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
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343
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Mansour AT, Buendia J, Xie J, Brisset F, Robin S, Naoufal D, Yazbeck O, Aitken DJ. β-Cyclodextrin-Mediated Enantioselective Photochemical Electrocyclization of 1,3-Dihydro-2H-azepin-2-one. J Org Chem 2017; 82:9832-9836. [DOI: 10.1021/acs.joc.7b01300] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ali T. Mansour
- CP3A
Organic Synthesis Group and Services Communs, ICMMO, UMR 8182, CNRS, Université Paris Sud, Université Paris-Saclay, Bât 420, 15 rue Georges Clemenceau, 91405 Orsay cedex, France
- Inorganic and Organometallic Coordination Chemistry Laboratory (LCIO), Faculty of Sciences (I) & PRASE-EDST, Lebanese University, Hadath, Lebanon
| | - Julien Buendia
- CP3A
Organic Synthesis Group and Services Communs, ICMMO, UMR 8182, CNRS, Université Paris Sud, Université Paris-Saclay, Bât 420, 15 rue Georges Clemenceau, 91405 Orsay cedex, France
| | - Juan Xie
- PPSM,
UMR 8531, CNRS, ENS Paris-Saclay, Université Paris-Saclay, 61 Avenue
du Président Wilson, 94235 Cachan cedex, France
| | - François Brisset
- CP3A
Organic Synthesis Group and Services Communs, ICMMO, UMR 8182, CNRS, Université Paris Sud, Université Paris-Saclay, Bât 420, 15 rue Georges Clemenceau, 91405 Orsay cedex, France
| | - Sylvie Robin
- CP3A
Organic Synthesis Group and Services Communs, ICMMO, UMR 8182, CNRS, Université Paris Sud, Université Paris-Saclay, Bât 420, 15 rue Georges Clemenceau, 91405 Orsay cedex, France
- UFR
Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, 4 avenue de l’Observatoire, 75270 Paris cedex 06, France
| | - Daoud Naoufal
- Inorganic and Organometallic Coordination Chemistry Laboratory (LCIO), Faculty of Sciences (I) & PRASE-EDST, Lebanese University, Hadath, Lebanon
| | - Ogaritte Yazbeck
- Inorganic and Organometallic Coordination Chemistry Laboratory (LCIO), Faculty of Sciences (I) & PRASE-EDST, Lebanese University, Hadath, Lebanon
| | - David J. Aitken
- CP3A
Organic Synthesis Group and Services Communs, ICMMO, UMR 8182, CNRS, Université Paris Sud, Université Paris-Saclay, Bât 420, 15 rue Georges Clemenceau, 91405 Orsay cedex, France
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344
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Huang X, Luo S, Burghaus O, Webster RD, Harms K, Meggers E. Combining the catalytic enantioselective reaction of visible-light-generated radicals with a by-product utilization system. Chem Sci 2017; 8:7126-7131. [PMID: 29147543 PMCID: PMC5637358 DOI: 10.1039/c7sc02621h] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 08/16/2017] [Indexed: 12/16/2022] Open
Abstract
We report an unusual reaction design in which a chiral bis-cyclometalated rhodium(iii) complex enables the stereocontrolled chemistry of photo-generated carbon-centered radicals and at the same time catalyzes an enantioselective sulfonyl radical addition to an alkene.
We report an unusual reaction design in which a chiral bis-cyclometalated rhodium(iii) complex enables the stereocontrolled chemistry of photo-generated carbon-centered radicals and at the same time catalyzes an enantioselective sulfonyl radical addition to an alkene. Specifically, employing inexpensive and readily available Hantzsch esters as the photoredox mediator, Rh-coordinated prochiral radicals generated by a selective photoinduced single electron reduction are trapped by allyl sulfones in a highly stereocontrolled fashion, providing radical allylation products with up to 97% ee. The hereby formed fragmented sulfonyl radicals are utilized via an enantioselective radical addition to form chiral sulfones, which minimizes waste generation.
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Affiliation(s)
- Xiaoqiang Huang
- Fachbereich Chemie , Philipps-Universität Marburg , Hans-Meerwein-Strasse 4 , 35043 Marburg , Germany .
| | - Shipeng Luo
- Fachbereich Chemie , Philipps-Universität Marburg , Hans-Meerwein-Strasse 4 , 35043 Marburg , Germany .
| | - Olaf Burghaus
- Fachbereich Chemie , Philipps-Universität Marburg , Hans-Meerwein-Strasse 4 , 35043 Marburg , Germany .
| | - Richard D Webster
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Klaus Harms
- 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 .
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345
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Yang C, Zhang W, Li YH, Xue XS, Li X, Cheng JP. Origin of Stereoselectivity of the Photoinduced Asymmetric Phase-Transfer-Catalyzed Perfluoroalkylation of β-Ketoesters. J Org Chem 2017; 82:9321-9327. [DOI: 10.1021/acs.joc.7b01130] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen Yang
- State
Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P.R. China
- Department
of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha 410073, China
| | - Wei Zhang
- State
Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P.R. China
| | - Yi-He Li
- Department
of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha 410073, China
| | - Xiao-Song Xue
- State
Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P.R. China
| | - Xin Li
- State
Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P.R. China
| | - Jin-Pei Cheng
- State
Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P.R. China
- Department
of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha 410073, China
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346
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Cuadros S, Dell'Amico L, Melchiorre P. Forging Fluorine-Containing Quaternary Stereocenters by a Light-Driven Organocatalytic Aldol Desymmetrization Process. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706763] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Sara Cuadros
- ICIQ -Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology; Avenida Països Catalans 16 43007 Tarragona Spain
| | - Luca Dell'Amico
- ICIQ -Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology; Avenida Països Catalans 16 43007 Tarragona Spain
| | - Paolo Melchiorre
- ICREA- Catalan Institution for Research and Advanced Studies; Passeig Lluís Companys 23 08010 Barcelona Spain
- ICIQ -Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology; Avenida Països Catalans 16 43007 Tarragona Spain
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347
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Synthesis of β-Keto SulfonesviaCoupling of Aryl/Alkyl Halides, Sulfur Dioxide and Silyl Enolates through Metal-Free Photoinduced C-X Bond Dissociation. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700525] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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348
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Zhang L, Meggers E. Stereogenic-Only-at-Metal Asymmetric Catalysts. Chem Asian J 2017; 12:2335-2342. [PMID: 28782915 DOI: 10.1002/asia.201700739] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 07/06/2017] [Indexed: 11/10/2022]
Abstract
Chirality is an essential feature of asymmetric catalysts. This review summarizes asymmetric catalysts that derive their chirality exclusively from stereogenic metal centers. Reported chiral-at-metal catalysts can be divided into two classes, namely, inert metal complexes, in which the metal fulfills a purely structural role, so catalysis is mediated entirely through the ligand sphere, and reactive metal complexes. The latter are particularly appealing because structural simplicity (only achiral ligands) is combined with the prospect of particularly effective asymmetric induction (direct contact of the substrate with the chiral metal center). Challenges and solutions for the design of such reactive stereogenic-only-at-metal asymmetric catalysts are discussed.
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Affiliation(s)
- Lilu Zhang
- 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
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349
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Edtmüller V, Pöthig A, Bach T. Enantioselective photocyclisation reactions of 2-aryloxycyclohex-2-enones mediated by a chiral copper-bisoxazoline complex. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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350
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Ghasimi S, Bretschneider SA, Huang W, Landfester K, Zhang KAI. A Conjugated Microporous Polymer for Palladium-Free, Visible Light-Promoted Photocatalytic Stille-Type Coupling Reactions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1700101. [PMID: 28852627 PMCID: PMC5566346 DOI: 10.1002/advs.201700101] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/27/2017] [Indexed: 06/07/2023]
Abstract
The Stille coupling reaction is a versatile method to mainly form aromatic C-C bonds. However, up to now, the use of palladium catalysts is necessary. Here, a palladium-free and photocatalytic Stille-type coupling reaction of aryl iodides and aryl stannanes catalyzing a conjugated microporous polymer-based phototcatalyst under visible light irradiation at room temperature is reported. The novel coupling reaction mechanism occurs between the photogenerated aryl radical under oxidative destannylation of the aryl stannane, and the electron-activated aryl iodide, resulting into the aromatic C-C bond formation reaction. The visible light-promoted Stille-type coupling reaction using the polymer-based pure organic photocatalyst offers a simple, sustainable, and more economic synthetic pathway toward palladium-free aromatic C-C bond formation.
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Affiliation(s)
- Saman Ghasimi
- Max Planck Institute for Polymer ResearchAckermannweg 10Mainz55128Germany
| | | | - Wei Huang
- Max Planck Institute for Polymer ResearchAckermannweg 10Mainz55128Germany
| | | | - Kai A. I. Zhang
- Max Planck Institute for Polymer ResearchAckermannweg 10Mainz55128Germany
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