1
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Stankevich KS, Cook MJ. A Highly Stereospecific Claisen-Sakurai Approach to Densely Functionalized Cyclopentenols. J Org Chem 2022; 87:12250-12256. [PMID: 36067340 DOI: 10.1021/acs.joc.2c01397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The formation of highly substituted cyclopentenols was developed using a Claisen-Sakurai reaction. Both elements of the reaction can be performed in a one-pot sequence that provides the corresponding cyclized products in high stereoselectivity. The stereochemical outcome is defined by a combination of Claisen stereospecificity and stereoelectronic effects in the Sakurai cyclization that promotes reactivity via an anti-SE' antiperiplanar transition state. This was determined by examination of the product stereochemistry and through detailed DFT analysis.
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Affiliation(s)
- Ksenia S Stankevich
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Matthew J Cook
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
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2
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Shimizu N, Shigemitsu H, Kida T, Bach T, Mori T. Visible Light-Induced Regio- and Enantiodifferentiating [2 + 2] Photocycloaddition of 1,4-Naphthoquinones Mediated by Oppositely Coordinating 1,3,2-Oxazaborolidine Chiral Lewis Acid. J Org Chem 2022; 87:8071-8083. [PMID: 35652135 DOI: 10.1021/acs.joc.2c00730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A range of asymmetric photochemical transformations using visible light have recently become considerably attractive. Among the various approaches, chiral Lewis acid association to enones for [2 + 2] and ortho photocycloadditions and oxadi-π-methane rearrangements have shown to be very promising. Naturally, chiral Lewis acid coordination protects one of the prochiral faces of the C═C double bond, which enables an effective enantiodifferentiation in the following bond-forming process(es). Here, we studied regio- and enantiodifferentiating [2 + 2] photocycloaddition reactions of naphthoquinone derivatives mediated by chiral oxazaborolidines. A stereochemical control was quite challenging for the 2-ene-1,4-dione substrate, as a double coordination of Lewis acid essentially cancels out the face selectivity, and a mono-coordination to each carbonyl group leads to an opposite stereochemical outcome. Furthermore, a stepwise coordination in the ground state of Lewis acid in a 1:1 fashion was practically inaccessible. We found that the excited-state decomplexation is a key to accomplish high regio- and enantioselectivities in the photocycloaddition of an ene-dione.
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Affiliation(s)
- Nao Shimizu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Hajime Shigemitsu
- Integrated Frontier Research for Medical Science Division Institute for OTRI, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Toshiyuki Kida
- Integrated Frontier Research for Medical Science Division Institute for OTRI, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, Garching 85747, Germany
| | - Tadashi Mori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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3
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Miyagawa A, Fukuhara G, Okada T. Acid dissociation under hydrostatic pressure: Structural implications for volumetric parameters. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Hancock EN, Wahl JM, Brown MK. Recent advances in the synthesis of gem-dimethylcyclobutane natural products. Nat Prod Rep 2020; 36:1383-1393. [PMID: 30855044 DOI: 10.1039/c8np00083b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: January 2000 to July 2018 gem-Dimethylcyclobutanes are a common motif found in a multitude of natural products, and thus these structures have captivated synthetic chemists for years. However, until the turn of the century, most synthetic efforts relied upon the use of widely available terpenes, such as pinene or caryophyllene, that already contain the gem-dimethylcyclobutane motif. This approach limits the scope of molecules that can be accessed readily. This review highlights recent syntheses in which the gem-dimethylcyclobutane is assembled via de novo approaches. An outlook on the future of this research area is also provided.
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Affiliation(s)
- Erin N Hancock
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47405, USA.
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5
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Kaur N, Verma Y, Grewal P, Ahlawat N, Bhardwaj P, Jangid NK. Photochemical C–N bond forming reactions for the synthesis of five-membered fused N-heterocycles. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1713378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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6
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Kaur N, Devi M, Verma Y, Grewal P, Bhardwaj P, Ahlawat N, Jangid NK. Photochemical Synthesis of Fused Five-membered O-heterocycles. CURRENT GREEN CHEMISTRY 2019. [DOI: 10.2174/2213346106666190904145200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Some transformations are not possible with ground-state reactions even in the presence of a
catalyst, hence they are performed under photochemical conditions. Electron transfer occurs even with
the photochemical excitement of one molecule where redox reaction is not possible at the ground
state. The side products are obtained from ground-state reactions. For C-C bond formation during photochemical
reactions, there is no requirement of any chemical activation of the substrates. Therefore,
these reactions are presented here for the synthesis of fused five-membered O-heterocycles in the context
of sustainable processes from 1964 to 2019.
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Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
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7
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Ji J, Wu W, Liang W, Cheng G, Matsushita R, Yan Z, Wei X, Rao M, Yuan DQ, Fukuhara G, Mori T, Inoue Y, Yang C. An Ultimate Stereocontrol in Supramolecular Photochirogenesis: Photocyclodimerization of 2-Anthracenecarboxylate Mediated by Sulfur-Linked β-Cyclodextrin Dimers. J Am Chem Soc 2019; 141:9225-9238. [PMID: 31117644 DOI: 10.1021/jacs.9b01993] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Stereoisomeric β-cyclodextrin (CD) dimers linked with a sulfur atom or an arene spacer were designed to create a tethered dual CD capsule for precisely manipulating the regio- and enantioselectivities of the photocyclodimerization of 2-anthracenecarboxylate (AC) to four stereoisomeric classical 9,10:9',10'-cyclodimers and two nonclassical 5,8:9',10'-cyclodimers. Among the dimeric CD hosts prepared, exo-3-thia-β-CD dimer formed 1:1 and 1:2 host-guest complexes with AC in aqueous solutions, the former of which hindered but the latter facilitated the AC photocyclodimerization with regio- and enantioselectivities much higher than those obtained with native β-CD or the rest of the β-CD dimers. The stereochemical outcomes turned out to be highly sensitive to and hence critically manipulable by the linking position and configuration of the connected saccharide units and the linker length, as well as the external variants, such as temperature, pH, and added salt. Eventually, the photocyclodimerization of AC mediated by the dimeric β-CD host gave enantiopure syn-head-to-tail-9,10:9',10'-cyclodimer in 97-98% yield in a pH 5.1 buffer solution at 0.5 °C and also in an aqueous CsCl solution at -20 °C.
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Affiliation(s)
- Jiecheng Ji
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Wenting Liang
- Institute of Environmental Science, Department of Chemistry , Shanxi University , Taiyuan 030006 , China
| | - Guo Cheng
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Ryohei Matsushita
- Department of Applied Chemistry , Osaka University , Yamada-oka 2-1 , Suita 565-0871 , Japan
| | - Zhiqiang Yan
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Xueqin Wei
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Ming Rao
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - De-Qi Yuan
- Faculty of Pharmaceutical Sciences , Kobe Gakuin University , Minatojima 1-1-3 , Chuo-ku , Kobe 650-8586 , Japan
| | - Gaku Fukuhara
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku 152-8551 , Japan
| | - Tadashi Mori
- Department of Applied Chemistry , Osaka University , Yamada-oka 2-1 , Suita 565-0871 , Japan
| | - Yoshihisa Inoue
- Department of Applied Chemistry , Osaka University , Yamada-oka 2-1 , Suita 565-0871 , Japan
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
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8
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Poplata S, Tröster A, Zou YQ, Bach T. Recent Advances in the Synthesis of Cyclobutanes by Olefin [2 + 2] Photocycloaddition Reactions. Chem Rev 2016; 116:9748-815. [PMID: 27018601 PMCID: PMC5025837 DOI: 10.1021/acs.chemrev.5b00723] [Citation(s) in RCA: 656] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 11/30/2022]
Abstract
The [2 + 2] photocycloaddition is undisputedly the most important and most frequently used photochemical reaction. In this review, it is attempted to cover all recent aspects of [2 + 2] photocycloaddition chemistry with an emphasis on synthetically relevant, regio-, and stereoselective reactions. The review aims to comprehensively discuss relevant work, which was done in the field in the last 20 years (i.e., from 1995 to 2015). Organization of the data follows a subdivision according to mechanism and substrate classes. Cu(I) and PET (photoinduced electron transfer) catalysis are treated separately in sections 2 and 4 , whereas the vast majority of photocycloaddition reactions which occur by direct excitation or sensitization are divided within section 3 into individual subsections according to the photochemically excited olefin.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Andreas Tröster
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - You-Quan Zou
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
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10
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McCallum ME, Rasik CM, Wood JL, Brown MK. Collaborative Total Synthesis: Routes to (±)-Hippolachnin A Enabled by Quadricyclane Cycloaddition and Late-Stage C-H Oxidation. J Am Chem Soc 2016; 138:2437-42. [PMID: 26859526 DOI: 10.1021/jacs.5b13586] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Described herein are synthetic efforts toward the synthesis of hippolachnin A. Two independently devised routes from the Brown and Wood groups allowed for the synthesis of hippolachnin A from the unusual starting material, quadricyclane, by harnessing the power of late-stage C-H oxidation. Collaborative union of the best features of the two routes allowed for preparation of the molecule with improved efficiency.
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Affiliation(s)
- Monica E McCallum
- Department of Chemistry and Biochemistry, Baylor University , One Bear Place 97348, Waco, Texas 76798, United States
| | - Christopher M Rasik
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - John L Wood
- Department of Chemistry and Biochemistry, Baylor University , One Bear Place 97348, Waco, Texas 76798, United States
| | - M Kevin Brown
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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11
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Bibal B, Mongin C, Bassani DM. Template effects and supramolecular control of photoreactions in solution. Chem Soc Rev 2014; 43:4179-98. [DOI: 10.1039/c3cs60366k] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Fort DA, Woltering TJ, Nettekoven M, Knust H, Bach T. Synthesis of Fluorinated Tricyclic Scaffolds by Intramolecular [2+2] Photocycloaddition Reactions. Angew Chem Int Ed Engl 2012; 51:10169-72. [PMID: 22962009 DOI: 10.1002/anie.201204080] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 08/03/2012] [Indexed: 11/07/2022]
Affiliation(s)
- Diego A Fort
- Lehrstuhl für Organische Chemie I, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
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13
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Fort DA, Woltering TJ, Nettekoven M, Knust H, Bach T. Synthesis of Fluorinated Tricyclic Scaffolds by Intramolecular [2+2] Photocycloaddition Reactions. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204080] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Brimioulle R, Guo H, Bach T. Enantioselective intramolecular [2+2] photocycloaddition reactions of 4-substituted coumarins catalyzed by a chiral Lewis acid. Chemistry 2012; 18:7552-60. [PMID: 22539275 DOI: 10.1002/chem.201104032] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 03/02/2012] [Indexed: 11/07/2022]
Abstract
Eight coumarins, which carry a terminal alkene tethered by a CH(2)XCH(2) group to their 4-position (X = CH(2), CMe(2), O, S, NBoc, NZ, NTs, NBn), were synthesized in overall yields of 51-80 %. Starting materials for the syntheses were either commercially available 4-hydroxycoumarin or 4-formylcoumarin. The intramolecular [2+2] photocycloaddition of these coumarins gave diastereoselectively products with a tetracyclic 3,3a,4,4a-tetrahydro-1H-cyclopenta[2,3]cyclobuta[1,2-c]chromen-5(2H)-one skeleton. Direct irradiation at λ = 300 nm in dichloromethane (c = 10 mM) led to product formation in good yields for most substrates, presumably via a singlet excited state intermediate. Due to the low coumarin absorption at λ >350 nm the photocycloaddition was slow upon irradiation at λ = 366 nm. Addition of a chiral oxazaborolidine-based Lewis acid (50 mol %) increased the reaction rate at λ = 366 nm and induced a significant enantioselectivity in the [2+2] photocycloaddition. Six out of eight coumarin substrates (X = CH(2), CMe(2), O, NBoc, NZ, NTs) gave the respective products in yields of 72-96 % and with 74-90 % enantiomeric excess (ee) upon irradiation in dichloromethane (c = 20 mM) at -75 °C. The Lewis acid presumably acts by coordination to the coumarin carbonyl oxygen atom, which leads to a bathochromic shift (redshift) of the UV absorption and which increases the singlet state lifetime. A second electrostatic interaction of the hydrogen atom at C3 with the oxygen atom of the oxazaborolidine is likely.
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Affiliation(s)
- Richard Brimioulle
- Lehrstuhl für Organische Chemie 1 and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
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15
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Weixler R, Hehn JP, Bach T. On the Regioselectivity of the Intramolecular [2 + 2]-Photocycloaddition of Alk-3-enyl Tetronates. J Org Chem 2011; 76:5924-35. [DOI: 10.1021/jo201066d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roland Weixler
- Lehrstuhl für Organische Chemie I, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Jörg P. Hehn
- Lehrstuhl für Organische Chemie I, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Thorsten Bach
- Lehrstuhl für Organische Chemie I, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
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16
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Murase T, Peschard S, Horiuchi S, Nishioka Y, Fujita M. Remote chiral transfer into [2+2] and [2+4] cycloadditions within self-assembled molecular flasks. Supramol Chem 2011. [DOI: 10.1080/10610278.2010.521833] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Takashi Murase
- a Department of Applied Chemistry , School of Engineering, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Stéphane Peschard
- a Department of Applied Chemistry , School of Engineering, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Shinnosuke Horiuchi
- a Department of Applied Chemistry , School of Engineering, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Yuki Nishioka
- a Department of Applied Chemistry , School of Engineering, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Makoto Fujita
- a Department of Applied Chemistry , School of Engineering, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- b Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST) , Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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Yuan Z, Chen J, Zeng Y, Li YY, Han Y, Li Y. Unsurpassed cage effect for the photolysis of dibenzyl ketones in water-soluble dendrimers. Org Biomol Chem 2011; 9:6256-64. [PMID: 21789328 DOI: 10.1039/c1ob05244f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Zhao Yuan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P R China
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18
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Rueping M, Vila C, Koenigs RM, Poscharny K, Fabry DC. Dual catalysis: combining photoredox and Lewis base catalysis for direct Mannich reactions. Chem Commun (Camb) 2010; 47:2360-2. [PMID: 21161098 DOI: 10.1039/c0cc04539j] [Citation(s) in RCA: 321] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dual catalytic system combining photoredox and Lewis base catalysis has been developed. By the appropriate choice of light source and catalyst, the photoredox cycle can be optimally modulated to match the base catalyzed reaction cycle to provide the corresponding products under mild reaction conditions.
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Affiliation(s)
- Magnus Rueping
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
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19
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Fleck M, Bach T. Total Synthesis of Punctaporonin C by a Regio- and Stereoselective [2+2]-Photocycloaddition. Chemistry 2010; 16:6015-32. [PMID: 20411543 DOI: 10.1002/chem.201000036] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Martin Fleck
- Lehrstuhl für Organische Chemie 1, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
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20
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Chiral photochemistry within natural and functionalized cyclodextrins: Chiral induction in photocyclization products from carbonyl compounds. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Fleck M, Bach T. Total Synthesis of the Tetracyclic Sesquiterpene (±)-Punctaporonin C. Angew Chem Int Ed Engl 2008; 47:6189-91. [DOI: 10.1002/anie.200801534] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Fleck M, Bach T. Totalsynthese des tetracyclischen Sesquiterpens (±)-Punctaporonin C. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801534] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Yang C, Mori T, Inoue Y. Supramolecular Enantiodifferentiating Photocyclodimerization of 2-Anthracenecarboxylate Mediated by Capped γ-Cyclodextrins: Critical Control of Enantioselectivity by Cap Rigidity. J Org Chem 2008; 73:5786-94. [DOI: 10.1021/jo800533y] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cheng Yang
- Department of Applied Chemistry, Osaka University, Suita 565-0871, Japan
| | - Tadashi Mori
- Department of Applied Chemistry, Osaka University, Suita 565-0871, Japan
| | - Yoshihisa Inoue
- Department of Applied Chemistry, Osaka University, Suita 565-0871, Japan
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Yang C, Nishijima M, Nakamura A, Mori T, Wada T, Inoue Y. A remarkable stereoselectivity switching upon solid-state versus solution-phase enantiodifferentiating photocyclodimerization of 2-anthracenecarboxylic acid mediated by native and 3,6-anhydro-γ-cyclodextrins. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.04.104] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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