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Zhang QB, Li F, Pan B, Yu L, Yue XG. Visible-Light-Mediated [2+2] Photocycloadditions of Alkynes. Chemistry 2024; 30:e202401501. [PMID: 38806409 DOI: 10.1002/chem.202401501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/21/2024] [Accepted: 05/27/2024] [Indexed: 05/30/2024]
Abstract
Visible-light-mediated [2+2] photocycloaddition reaction can be considered an ideal solution due to its green and sustainable properties, and is one of the most efficient methods to synthesize four-membered ring motifs. Although research on the [2+2] photocycloaddition of alkynes is challenging because of the diminished reactivity of alkynes, and the more significant ring strain of the products, remarkable achievements have been made in this field. In this article, we highlight the recent advances in visible-light-mediated [2+2] photocycloaddition reactions of alkynes, with focus on the reaction mechanism and the late-stage synthetic applications. Advances in obtaining cyclobutenes, azetines, and oxetene active intermediates continue to be breakthroughs in this fascinating field of research.
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Affiliation(s)
- Qing-Bao Zhang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Feng Li
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Bin Pan
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Lei Yu
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Xiang-Guo Yue
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
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2
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Pan G, Qin S, Xu D, Kühn FE, Guo H. Visible Light-Induced Pericyclic Cascade Reaction for the Synthesis of Quinolinone Derivatives with an Oxabicyclo[4.2.0]octene Skeleton. Org Lett 2021; 23:2959-2963. [PMID: 33783210 DOI: 10.1021/acs.orglett.1c00642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A photoinduced pericyclic cascade reaction has been developed to afford oxabicyclo[4.2.0]octenes. Mechanistic studies show that this reaction undergoes [2 + 2]-photocycloaddition, base-promoted elimination, retro-4π-electrocyclization, [1,5]-H shift, and 4π-electrocyclization procedures. This reaction features wide substrate scope, good functional group tolerance, and excellent diastereoselectivity.
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Affiliation(s)
- Guangxing Pan
- Academy for Engineering and Technology, Fudan University, 220 Handan Road, Shanghai 200433, P.R. China
| | - Shaoheng Qin
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Dawen Xu
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P.R. China
| | - Fritz E Kühn
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Hao Guo
- Academy for Engineering and Technology, Fudan University, 220 Handan Road, Shanghai 200433, P.R. China.,Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P.R. China
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3
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Shan Y, Su L, Zhao Z, Chen D. The Construction of Nitrogen‐Containing Heterocycles from Alkynyl Imines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001283] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yingying Shan
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
| | - Lei Su
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
| | - Zihan Zhao
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
| | - Dianpeng Chen
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
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4
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Das E, Basak S, Anoop A, Chand S, Basak A. How To Achieve High Regioselectivity in Barrier-less Nucleophilic Addition to p-Benzynes Generated via Bergman Cyclization of Unsymmetrical Cyclic Azaenediyne? J Org Chem 2019; 84:2911-2921. [DOI: 10.1021/acs.joc.9b00060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eshani Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
| | - Shyam Basak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
| | - Anakuthil Anoop
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
| | - Santanu Chand
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
| | - Amit Basak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India
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5
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Abstract
This review represents the most complete description of the scientific results obtained on a photochemical reaction described 110 years ago by an Italian scientist.
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Affiliation(s)
- Maurizio D'Auria
- Dipartimento di Scienze
- Università della Basilicata
- 85100 Potenza
- Italy
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6
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Pohida K, Maloney DJ, Mott BT, Rai G. Room-Temperature, Copper-Free Sonogashira Reactions Facilitated by Air-Stable, Monoligated Precatalyst [DTBNpP] Pd(crotyl)Cl. ACS OMEGA 2018; 3:12985-12998. [PMID: 31458021 PMCID: PMC6644404 DOI: 10.1021/acsomega.8b01868] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/26/2018] [Indexed: 05/03/2023]
Abstract
A novel application of [DTBNpP] Pd(crotyl)Cl (DTBNpP = di-tert-butylneopentylphosphine) (P2), an air-stable, commercially available palladium precatalyst that allows rapid access to a monoligated state, has been identified for room-temperature, copper-free Sonogashira couplings of challenging aryl bromides and alkynes. The mild reaction conditions with TMP in dimethyl sulfoxide afford up to 97% yields, excellent functional group tolerability, and broad reaction compatibility with access to one-pot indole formation.
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7
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Chen M, Yang C, Wang Y, Li D, Xia W. UV Light Induced Direct Synthesis of Phenanthrene Derivatives from a Linear 3-Aryl-N-(arylsulfonyl) Propiolamides. Org Lett 2016; 18:2280-3. [DOI: 10.1021/acs.orglett.6b00878] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ming Chen
- State Key Lab of Urban Water
Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology, Harbin 150080, China
| | - Chao Yang
- State Key Lab of Urban Water
Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology, Harbin 150080, China
| | - Yanpei Wang
- State Key Lab of Urban Water
Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology, Harbin 150080, China
| | - Dazhi Li
- State Key Lab of Urban Water
Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology, Harbin 150080, China
| | - Wujiong Xia
- State Key Lab of Urban Water
Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology, Harbin 150080, China
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Kobayashi K, Honda Y, Kuroda M. A Convenient Synthesis of 1-Alkoxy-2-alkyl-1,2-dihydroisoquinoline-3,4-diones Utilizing the Reaction of 2-(Dialkoxymethyl)phenyllithiums with Dimethyl Oxalate. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201500254] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Srivastava A, Yadav A, Samanta S. Biopolymeric alginic acid: an efficient recyclable green catalyst for the Friedel–Crafts reaction of indoles with isoquinoline-1,3,4-triones in water. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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10
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Xu C, Cai Y, Ren C, Gao J, Hao J. Zinc-triggered hydrogelation of self-assembled small molecules to inhibit bacterial growth. Sci Rep 2015; 5:7753. [PMID: 25583430 PMCID: PMC4291577 DOI: 10.1038/srep07753] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 11/21/2014] [Indexed: 12/18/2022] Open
Abstract
There is a significant need to develop antibacterial materials that could be applied locally and directly to the places surrounded by large amount of bacteria, in order to address the problems of bacterial antibiotic-resistance or irreversible biofilm formation. Hydrogels are thought to be suitable candidates due to their versatile applications in biomedical field. Among them, small molecular hydrogels have been paid lots of attention because they are easy to design and fabricate and often sensitive to external stimuli. Meanwhile, the antibacterial activity of metal ions are attracting more and more attention because resistance to them are not yet found within bacteria. We therefore designed the zinc ion binding peptide of Nap-GFFYGGGHGRGD, who can self-assemble into hydrogels after binds Zn(2+) and inhibit the growth of bacteria due to the excellent antibacterial activity of Zn(2+). Upon the addition of zinc ions, solutions containing Nap-GFFYGGGHGRGD transformed into supramolecular hydrogels composed of network of long nano-fibers. Bacterial tests revealed an antibacterial effect of the zinc triggered hydrogels on E. coli. The studied small molecular hydrogel shows great potential in locally addressing bacterial infections.
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Affiliation(s)
- Chao Xu
- National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, P. R. China
| | - Yanbin Cai
- College of Life Science, Nankai University, Tianjin 300071, P. R. China
- State Key Laboratory of Medicinal Chemical Biology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P. R. China
| | - Chunhua Ren
- College of Life Science, Nankai University, Tianjin 300071, P. R. China
- State Key Laboratory of Medicinal Chemical Biology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P. R. China
| | - Jie Gao
- State Key Laboratory of Medicinal Chemical Biology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P. R. China
| | - Jihui Hao
- National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, P. R. China
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11
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Ghalib RM, Chidan Kumar CS, Hashim R, Sulaiman O, Fun HK. Crystal structure of 2-(1,3-dioxoindan-2-yl)isoquinoline-1,3,4-trione. Acta Crystallogr E Crystallogr Commun 2015; 71:o6-7. [PMID: 25705509 PMCID: PMC4331915 DOI: 10.1107/s2056989014025997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 11/26/2014] [Indexed: 11/10/2022]
Abstract
In the title isoquinoline-1,3,4-trione derivative, C18H9NO5, the five-membered ring of the indane fragment adopts an envelope conformation with the nitrogen-substituted C atom being the flap. The planes of the indane benzene ring and the isoquinoline-1,3,4-trione ring make a dihedral angle of 82.06 (6)°. In the crystal, molecules are linked into chains extending along thebcplaneviaC—H...O hydrogen-bonding interactions, enclosingR22(8) andR22(10) loops. The chains are further connected by π–π stacking interations, with centroid-to-centroid distances of 3.9050 (7) Å, forming layers parallel to thebaxis.
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12
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Węcławski MK, Tasior M, Hammann T, Cywiński PJ, Gryko DT. From π-expanded coumarins to π-expanded pentacenes. Chem Commun (Camb) 2014; 50:9105-8. [DOI: 10.1039/c4cc03078h] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Dihydroxyanthraquinone can be transformed into head-to-tail bis-coumarins which undergo photo-dehydrogenative coupling leading to coronene derivatives.
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Affiliation(s)
| | | | - Tommy Hammann
- NanoPolyPhotonics
- Fraunhofer Institute for Applied Polymer Research
- 14476 Potsdam-Golm, Germany
| | - Piotr J. Cywiński
- NanoPolyPhotonics
- Fraunhofer Institute for Applied Polymer Research
- 14476 Potsdam-Golm, Germany
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13
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Mei J, Zhang X, Zhu M, Wang J, Wang L, Wang L. Barium-triggered β-sheet formation and hydrogelation of a short peptide derivative. RSC Adv 2014. [DOI: 10.1039/c3ra45023f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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14
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D'Auria M, Racioppi R. Oxetane synthesis through the Paternò-Büchi reaction. Molecules 2013; 18:11384-428. [PMID: 24043139 PMCID: PMC6269742 DOI: 10.3390/molecules180911384] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 09/05/2013] [Accepted: 09/10/2013] [Indexed: 11/16/2022] Open
Abstract
The Paternò-Büchi reaction is a photochemical reaction between a carbonyl compound and an alkene to give the corresponding oxetane. In this review the mechanism of the reaction is discussed. On this basis the described use in the reaction with electron rich alkenes (enolethers, enol esters, enol silyl ethers, enanines, heterocyclic compounds has been reported. The stereochemical behavior of the reaction is particularly stressed. We pointed out the reported applications of this reaction to the synthesis of naturally occuring compounds.
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Affiliation(s)
- Maurizio D'Auria
- Dipatimento di Scienze, Università della Basilicata, Viale dell'Ateneo Lucano 19, 85100 Potenza, Italy.
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15
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Tan SB, Huang C, Chen X, Wu Y, Zhou M, Zhang C, Zhang Y. Small molecular inhibitors of miR-1 identified from photocycloadducts of acetylenes with 2-methoxy-1,4-naphthalenequinone. Bioorg Med Chem 2013; 21:6124-31. [PMID: 23685176 DOI: 10.1016/j.bmc.2013.04.058] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 04/01/2013] [Accepted: 04/16/2013] [Indexed: 12/21/2022]
Abstract
Small molecules which can modulate endogenous microRNAs are important chemical tools to study microRNA regulational network. In this Letter we screened the [2+2] photocycloadducts of 2-methoxy-1,4-naphthalenequinone with a series of aryl acetylenes on their activity to modulate endogenous microRNAs. A potent inhibitor of the muscle-specific miR-1 which is closely related with cardiac development and disease was identified. The small molecular inhibitor was the cyclobutene type product derived from the photocycloaddition of 2-methoxy-1,4-naphthalenequinone with tert-butyl (5-(phenylethynyl)quinolin-8-yl) carbonate. Analogues of the small molecular inhibitor were then prepared using similar photocycloaddition reactions for evaluation on inhibition activity on miR-1 to provide structure-activity relationship of the miR-1 inhibitor.
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Affiliation(s)
- Su-Bee Tan
- School of Life Science, State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, PR China
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16
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Huang C, Zheng M, Xu J, Zhang Y. Photo-induced cycloaddition reactions of α-diketones and transformations of the photocycloadducts. Molecules 2013; 18:2942-66. [PMID: 23459304 PMCID: PMC6270630 DOI: 10.3390/molecules18032942] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 02/05/2013] [Accepted: 02/06/2013] [Indexed: 11/16/2022] Open
Abstract
Photocycloaddition, along with subsequent transformation of the photocycloadducts, provides expeditious ways to construct various structures. The photo-induced reactions of α-diketones have been reported to proceed via different reaction pathways with the involvement of one or two of the carbonyl groups. Photoinduced reactions of cyclic α-diketones including N-acetylisatin, phenanthrenequinone and isoquinolinetrione with different C=C containing compounds could take place via [2 + 2], [4 + 2] or [4 + 4] photocycloaddition pathways. We have investigated the photoreactions of these cyclic α-diketones with different types of alkenes and alkynes, with a focus on the unusual cascade reactions initiated by the photocycloaddition reactions of these cyclic α-diketones and the applications of these photocycloaddition reactions along with the transformation of the photocycloadducts. In this paper, we discuss the diverse photo-cycloaddition pathways found in the photocycloaddition of o-diones leading to various photocycloadducts and the potential applications of these reactions via further transformation reactions of the adducts.
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Affiliation(s)
| | | | - Jianhua Xu
- Authors to whom correspondence should be addressed; E-Mails: (J.X.); (Y.Z.)
| | - Yan Zhang
- Authors to whom correspondence should be addressed; E-Mails: (J.X.); (Y.Z.)
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17
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Wu DD, Huang CM, Wu YH, Fun HK, Xu JH, Zhang Y. Acid-mediated transformation of spirocyclopropyl oxetanes: a facile approach to spirocyclopropyl butenolides and γ-butyrolactones. RSC Adv 2013. [DOI: 10.1039/c3ra00178d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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18
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Huang CM, Jiang H, Wang RZ, Quah CK, Fun HK, Zhang Y. Photocycloadditions of substituted oxazoles with isoquinoline-1,3,4-trione—chemo-, regio-, diastereoselectivities and transformation of the photocycloadducts. Org Biomol Chem 2013; 11:5023-33. [DOI: 10.1039/c3ob40645h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dong LJ, Fan TT, Wang C, Sun J. One-Pot Formation of Chiral Polysubstituted 3,4-Dihydropyrans via a Novel Organocatalytic Domino Sequence Involving Alkynal Self-Condensation. Org Lett 2012; 15:204-7. [DOI: 10.1021/ol3032285] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Jin Dong
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Tian-Tian Fan
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Chao Wang
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Sun
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, and Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
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20
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Abstract
In this chapter, most of the reported work deals with the photochemistry of carbonyl compounds; however, the photoreactions of other functions, such as the photo-Claisen rearrangement or the photocleavage of cyclic ethers, are also included. In the present volume, time coverage is 2010–2011, and only original research articles are quoted. In general, reviews or purely theoretical calculations are not systematically included. As usually, the material is organized according to established types of reactions (e.g., Norrish I/II, hydrogen abstraction, Paternò-Büchi, photoelimination, photo-Fries/photo-Claisen, etc.). After presenting the basic photochemical aspects, more specific findings are reported. They include synthetic applications, stereoselectivity, and biological or technological implications. Next, the attention is focused on photochemical reactions in anisotropic media, including (micro)heterogeneous or supramolecular systems, solid matrixes or fully organized crystals. Finally, mechanistic studies based on direct experimental evidence are highlighted, especially when transient absorption spectroscopy or related ultrafast detection are employed.
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Affiliation(s)
- M. Consuelo Jiménez
- Departamento de Química, Instituto de Tecnología Química UPV-CSIC Universidad Politécnica de Valencia camino de Vera s/n, E-46022 Valencia Spain
| | - Miguel A. Miranda
- Departamento de Química, Instituto de Tecnología Química UPV-CSIC Universidad Politécnica de Valencia camino de Vera s/n, E-46022 Valencia Spain
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Jiang H, Huang C, Guo J, Zeng C, Zhang Y, Yu S. Direct C-H functionalization of enamides and enecarbamates by using visible-light photoredox catalysis. Chemistry 2012; 18:15158-66. [PMID: 23018775 DOI: 10.1002/chem.201201716] [Citation(s) in RCA: 154] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/27/2012] [Indexed: 11/10/2022]
Abstract
Direct C-H functionalization of various enamides and enecarbamates was realized through visible-light photoredox catalyzed reactions. Under the optimized conditions using [Ir(ppy)(2)(dtbbpy)PF(6)] as photocatalyst in combination with Na(2)HPO(4), enamides such as N-vinylpyrrolidinone could be easily functionalized by irradiation of the reaction mixture overnight in acetonitrile with visible light. The scope of the reaction with respect to enamide and enecarbamate substrates by using diethyl 2-bromomalonate for the alkylation reaction was explored, followed by an investigation of the scope of alkylating reagents used to react with the enamides and enecarbamates. The results indicated that reaction takes place with quite broad substrate scope, however, tertiary enamides with an internal C=C double bond in the E configuration could not be alkylated. Alkylation of N-vinyl tertiary enamides and enecarbamates gave monoalkylated products exclusively in the E configuration. Alkylation of N-vinyl secondary enamides gave doubly alkylated products. Double bond migration was observed in the reaction of electron-deficient bromides such as 3-bromoacetyl acetate with N-vinylpyrrolidinone. A mechanism is proposed for the reaction that is different from reported reactions of SOMOphiles with a nonfunctionalized C=C double bond. Further tests on the trifluoromethylation and arylation of enamides and enecarbamates under similar conditions showed that the reactions could serve as a mild, practical, and environmentally friendly approach to various functionalized enamides and enecarbamates.
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Affiliation(s)
- Heng Jiang
- State Key Laboratory of Analytical Chemistry for Life Science, Institute of Chemical Biology and Drug Innovation, School of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Nanjing 210093, China
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22
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Chen X, Huang C, Zhang W, Wu Y, Chen X, Zhang CY, Zhang Y. A universal activator of microRNAs identified from photoreaction products. Chem Commun (Camb) 2012; 48:6432. [PMID: 22613953 DOI: 10.1039/c2cc32157b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A small molecule activator of microRNAs has been identified from photoreaction products of naphthalene-1,4-dione with acetylenes and the universal activation on miRNAs was realized through significant promotion on the processing of precursor microRNAs by the compound.
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Affiliation(s)
- Xuejiao Chen
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, 210093, P. R. China.
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23
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Wu DD, He MT, Liu QD, Wang W, Zhou J, Wang L, Fun HK, Xu JH, Zhang Y. Photoinduced reactions of bicycloalkylidenes with isatin and isoquinolinetrione. Org Biomol Chem 2012; 10:3626-35. [PMID: 22495580 DOI: 10.1039/c2ob07158d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Dong-Dong Wu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, PR China
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24
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Aikawa K, Hioki Y, Shimizu N, Mikami K. Catalytic asymmetric synthesis of stable oxetenes via Lewis acid-promoted [2+2] cycloaddition. J Am Chem Soc 2011; 133:20092-5. [PMID: 22070285 DOI: 10.1021/ja2085299] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly enantioselective and atom-economical [2 + 2] cycloaddition of various alkynes with trifluoropyruvate using a dicationic (S)-BINAP-Pd catalyst has been established. This is the first enantioselective synthesis of stable oxetene derivatives, whose structure has been clarified by X-ray analysis. This catalytic process offers a practical synthetic method for oxetene derivatives (catalyst loading: up to 0.1 mol %), which can serve as novel chiral building blocks for pharmaceuticals and agrochemicals and can also be transformed into a variety of enantiomerically enriched CF(3)-substituted compounds with high stereoselectivity.
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Affiliation(s)
- Kohsuke Aikawa
- Department of Applied Chemistry, Tokyo Institute of Technology, Tokyo 152-8552, Japan
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Fun HK, Quah CK, Huang C, Yu H. Methyl 2,2'-dimethyl-4'-[2-(methyl-sulfan-yl)eth-yl]-1,3-dioxo-2,3-dihydro-1H,4'H-spiro-[isoquinoline-4,5'-oxazole]-4'-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o2216-7. [PMID: 22058900 PMCID: PMC3200713 DOI: 10.1107/s1600536811030133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 07/26/2011] [Indexed: 11/10/2022]
Abstract
In the isoquinoline ring system of the title mol-ecule, C(18)H(20)N(2)O(5)S, the fused N-heterocyclic ring is distorted towards a half-boat conformation. The methyl formate moiety is disordered over two sets of sites with refined occupancies of 0.882 (5) and 0.118 (5). In the crystal, mol-ecules are linked via weak inter-molecular C-H⋯O hydrogen bonds into one-dimensional chains along [010].
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Affiliation(s)
- Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Chengmei Huang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Haitao Yu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
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Fun HK, Quah CK, Xu K, Zhang Y. Methyl 2-acetamido-2-(4-hydroxy-2-methyl-1,3-dioxo-1,2,3,4-tetrahydroisoquinolin-4-yl)-4-methylpentanoate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1710-1. [PMID: 21837104 PMCID: PMC3151770 DOI: 10.1107/s1600536811022999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 06/14/2011] [Indexed: 11/22/2022]
Abstract
In the isoquinoline ring system of the title molecule, C19H24N2O6, the N-heterocyclic ring is in a half-boat conformation. The molecular structure is stabilized by an intramolecular O—H⋯O hydrogen bond, which generates an S(7) ring motif. In the crystal, molecules are linked via intermolecular bifurcated N—H⋯(O,O) and weak C—H⋯O hydrogen bonds into a three-dimensional network.
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Fun HK, Quah CK, Huang C, Yu H. 5-Meth-oxy-1,2',3-trimethyl-4,6-dioxa-2-aza-spiro-[bicyclo-[3.2.0]hept-2-ene-7,4'-isoquinoline]-1',3'(2'H,4'H)-dione. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1340-1. [PMID: 21754736 PMCID: PMC3120469 DOI: 10.1107/s1600536811016266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 04/29/2011] [Indexed: 11/24/2022]
Abstract
In the isoquinoline ring system of the title molecule, C16H16N2O5, the N-heterocyclic ring is in a half-boat conformation. The dioxaazaspiro ring is essentially planar [maximum deviation = 0.022 (1) Å] and forms a dihedral angle of 24.56 (4)° with the benzene ring.
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Fun HK, Quah CK, Xu K, Zhang Y. Methyl 4'-isobutyl-2,2'-dimethyl-1,3-dioxo-2,3-dihydro-1H,4'H-spiro-[iso-quinoline-4,5'-oxazole]-4'-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1519-20. [PMID: 21754883 PMCID: PMC3120529 DOI: 10.1107/s1600536811019003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 05/19/2011] [Indexed: 11/12/2022]
Abstract
In the isoquinoline ring system of the title mol-ecule, C(19)H(22)N(2)O(5), the N-heterocyclic ring is in a half-boat conformation. The dioxa-2-aza-spiro ring is essentially planar [maximum deviation = 0.042 (1) Å] and forms a dihedral angle of 81.85 (4)° with the benzene ring. In the crystal, the mol-ecules are linked via inter-molecular C-H⋯O hydrogen bonds into chains along [010].
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Affiliation(s)
- Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Kai Xu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
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Fun HK, Quah CK, Huang C, Yu H. 1-Benzyl-5-meth-oxy-2',3-dimethyl-4,6-dioxa-2-aza-spiro-[bicyclo-[3.2.0]hept-2-ene-7,4'-isoquinoline]-1',3'(2'H,4'H)-dione. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1311-2. [PMID: 21754712 PMCID: PMC3120373 DOI: 10.1107/s160053681101600x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 04/27/2011] [Indexed: 11/10/2022]
Abstract
In the isoquinoline ring system of the title molecule, C22H20N2O5, the N-heterocyclic ring is in a half-boat conformation. The dioxa-2-azaspiro ring is essentially planar [maximum deviation = 0.026 (1) Å] and forms dihedral angles of 22.53 (5) and 64.46 (5)° with the benzene and phenyl rings, respectively. The molecular structure is stabilized by a weak intramolecular C—H⋯O hydrogen bond, which generates an S(7) ring motif. In the crystal, molecules are linked via weak intermolecular C—H⋯O and C—H⋯N hydrogen bonds into layers parallel to (102).
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Fun HK, Quah CK, Huang C, Yu H. (1S*,4'S*,5R*)-1-Isobutyl-5-meth-oxy-2',3-dimethyl-4,6-dioxa-2-aza-spiro-[bicyclo-[3.2.0]hept-2-ene-7,4'-isoquinoline]-1',3'(2'H,4'H)-dione. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1273-4. [PMID: 21754557 PMCID: PMC3089195 DOI: 10.1107/s1600536811015327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Accepted: 04/22/2011] [Indexed: 11/24/2022]
Abstract
In the isoquinoline ring system of the title compound, C19H22N2O5, the N-heterocyclic ring is in a half-chair conformation. The dioxa-2-azaspiro ring is essentially planar [maximum deviation of 0.025 (1) Å] and forms a dihedral angle of 23.51 (5)° with the benzene ring. In the crystal, molecules are linked via weak intermolecular C—H⋯O and C—H⋯N hydrogen bonds into chains along [010].
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Fun HK, Quah CK, Huang C, Yu H. (1S*,4'S*,5R*)-1-Isopropyl-5-meth-oxy-2',3-dimethyl-4,6-dioxa-2-aza-spiro-[bicyclo-[3.2.0]hept-2-ene-7,4'-isoquinoline]-1',3'(2'H,4'H)-dione. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1271-2. [PMID: 21754556 PMCID: PMC3089152 DOI: 10.1107/s1600536811015315] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Accepted: 04/22/2011] [Indexed: 11/10/2022]
Abstract
In the isoquinoline ring system of the title molecule, C18H20N2O5, the N-heterocyclic ring is in a half-boat conformation. The dioxa-2-azaspiro ring is essentially planar, with a maximum deviation of 0.029 (1) Å, and makes a dihedral angle of 30.63 (5)° with the benzene ring. The molecular structure is stabilized by a weak intramolecular C—H⋯O hydrogen bond, which generates a S(6) ring motif. In the crystal, molecules are linked via weak intermolecular C—H⋯O hydrogen bonds into a three-dimensional supramolecular network. Additional stabilization is provided by π–π stacking interactions between symmetry-related benzene rings with a centroid–centroid distance of 3.6507 (5) Å.
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Huang C, Yu H, Miao Z, Zhou J, Wang S, Fun HK, Xu J, Zhang Y. Facile synthesis of spiroisoquinolines based on photocycloaddition of isoquinoline-1,3,4-trione with oxazoles. Org Biomol Chem 2011; 9:3629-31. [PMID: 21472160 DOI: 10.1039/c1ob05143a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Chengmei Huang
- School of Chemistry and Chemical Engineering, Key Laboratory of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, P R China.
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Wang L, Huang YC, Liu Y, Fun HK, Zhang Y, Xu JH. Photoinduced [4 + 4], [4 + 2], and [2 + 2] Cycloadditions of o-Quinones with Oxazoles: Chemo-, Regio-, and Diastereoselectivity. J Org Chem 2010; 75:7757-68. [PMID: 21028907 DOI: 10.1021/jo101764f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lei Wang
- School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Yu-Cheng Huang
- School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Yang Liu
- School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM Penang, Malaysia
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Jian-Hua Xu
- School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, Nanjing, 210093, People's Republic of China
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Fun HK, Goh JH, Yu H, Zhang Y. (Z)-1-Acetyl-3-[2-oxo-1-phenyl-2-(3-pyrid-yl)ethyl-idene]indolin-2-one. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2232-3. [PMID: 21588602 PMCID: PMC3007968 DOI: 10.1107/s1600536810030874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Accepted: 08/02/2010] [Indexed: 12/03/2022]
Abstract
The title compound, C(23)H(16)N(2)O(3), exists in a Z configuration with respect to the acyclic C=C bond. The pyridine and phenyl rings are oriented at dihedral angles of 72.97 (4) and 45.05 (4)°, respectively, with respect to the almost planar indoline ring system [maximum deviation 0.080 (1) Å]. The pyridine and phenyl rings are oriented almost perpendicular to each other [dihedral angle 88.93 (5)°]. In the crystal, mol-ecules are inter-connected into a three-dimensional framework via inter-molecular C-H⋯O and C-H⋯N hydrogen bonds and weak π-π inter-actions [centroid-centroid distance = 3.681 (1) Å].
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Affiliation(s)
- Hoong-Kun Fun
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Jia Hao Goh
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Haitao Yu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
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