101
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Ding W, Yoshikai N. Cobalt-Catalyzed Intermolecular [2+2] Cycloaddition between Alkynes and Allenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813283] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Wei Ding
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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102
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Ding W, Yoshikai N. Cobalt-Catalyzed Intermolecular [2+2] Cycloaddition between Alkynes and Allenes. Angew Chem Int Ed Engl 2019; 58:2500-2504. [PMID: 30614605 DOI: 10.1002/anie.201813283] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/26/2018] [Indexed: 12/25/2022]
Abstract
An intermolecular [2+2] cycloaddition reaction between an alkyne and an allene is reported. In the presence of a cobalt(I)/diphosphine catalyst, a near equimolar mixture of the alkyne and allene is converted into a 3-alkylidenecyclobutene derivative in good yield with high regioselectivity. The reaction tolerates a variety of internal alkynes and mono- or disubstituted allenes bearing various functional groups. The reaction is proposed to involve regioselective oxidative cyclization of the alkyne and allene to form a 4-alkylidenecobaltacyclopentene intermediate, with subsequent C-C reductive elimination.
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Affiliation(s)
- Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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103
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Fedorova OA, Saifutiarova AE, Gulakova EN, Guskova EO, Aliyeu TM, Shepel NE, Fedorov YV. The regioselective [2 + 2] photocycloaddition reaction of 2-(3,4-dimethoxystyryl)quinoxaline in solution. Photochem Photobiol Sci 2019; 18:2208-2215. [DOI: 10.1039/c9pp00028c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The [2+2] photocycloaddition between two molecules of (E)-2-(3,4-dimethoxystyryl)-quinoxaline (1) in an acetonitrile solution is the first example of the regioselective and stereospecific formation of a cyclobutane derivative without applying any method for the preorganization of molecules in a dilute solution.
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Affiliation(s)
- Olga A. Fedorova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
- D. Mendeleev University of Chemical Technology of Russia
- Moscow
| | - Alina E. Saifutiarova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
- D. Mendeleev University of Chemical Technology of Russia
- Moscow
| | - Elena N. Gulakova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
| | - Elena O. Guskova
- D. Mendeleev University of Chemical Technology of Russia
- Moscow
- Russia
| | - Tseimur M. Aliyeu
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
| | - Nikolai E. Shepel
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
| | - Yuri V. Fedorov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
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104
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Sutyak KB, Lee W, Zavalij PV, Gutierrez O, Davis JT. Templating and Catalyzing [2+2] Photocycloaddition in Solution Using a Dynamic G-Quadruplex. Angew Chem Int Ed Engl 2018; 57:17146-17150. [PMID: 30395701 DOI: 10.1002/anie.201811202] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Indexed: 11/08/2022]
Abstract
We describe a templating/covalent capture strategy that enables photochemical formation of 8 cyclobutanes in one noncovalent assembly. This process was characterized by experiment and quantum mechanical/molecular mechanics (ONIOM) calculations. Thus, KI and 16 units of 5'-cinnamate guanosine form a G-quadruplex where C=C π bonds in neighboring G4 -quartets are separated by 3.3 Å, enabling [2+2] photocycloaddition in solution. This reaction is high-yielding (>90 %), regio- and diastereoselective. Since all components are in dynamic equilibrium this photocycloaddition is catalytic in K+ .
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Affiliation(s)
- Keith B Sutyak
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Wes Lee
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Peter V Zavalij
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Osvaldo Gutierrez
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Jeffery T Davis
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
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105
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Lei T, Zhou C, Wei XZ, Yang B, Chen B, Tung CH, Wu LZ. Construction of Cyclobutanes by Multicomponent Cascade Reactions in Homogeneous Solution through Visible-Light Catalysis. Chemistry 2018; 25:879-884. [PMID: 30315713 DOI: 10.1002/chem.201804946] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Indexed: 01/23/2023]
Abstract
[2+2] Photocycloaddition of two olefins is a general method to assemble the core scaffold, cyclobutane, found in numerous bioactive molecules. A new approach to synthesize cyclobutanes through multicomponent cascade reactions by merging aldol reaction and Witting reaction with visible-light-induced [2+2] cycloaddition is reported. An array of cyclobutanes with high selectivity has been achieved from commercially available aldehydes, ketones (or phosphorus ylide), and olefins with visible-light irradiation of a catalytic amount of (fac-tris(2-phenylpyridinato-C2 ,N)iridium) ([Ir(ppy)3 ]) at room temperature. Control experiments and spectroscopic studies revealed that the triplet-triplet energy transfer from the excited [Ir(ppy)3 ]* to enones, generated in situ from aldehyde and ketone or aldehyde and phosphorus ylide, is responsible for these simple and efficient muticomponent transformations.
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Affiliation(s)
- Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiang-Zhu Wei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bing Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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106
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Akula PS, Hong BC, Lee GH. Catalyst- and Substituent-Controlled Switching of Chemoselectivity for the Enantioselective Synthesis of Fully Substituted Cyclobutane Derivatives via 2 + 2 Annulation of Vinylogous Ketone Enolates and Nitroalkene. Org Lett 2018; 20:7835-7839. [DOI: 10.1021/acs.orglett.8b03335] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pavan Sudheer Akula
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi 621, Taiwan, Republic of China
| | | | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan, Republic of China
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107
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Savidov N, Gloriozova TA, Poroikov VV, Dembitsky VM. Highly oxygenated isoprenoid lipids derived from fungi and fungal endophytes: Origin and biological activities. Steroids 2018; 140:114-124. [PMID: 30326211 DOI: 10.1016/j.steroids.2018.10.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/19/2018] [Accepted: 10/09/2018] [Indexed: 02/07/2023]
Abstract
This mini review is devoted to highly oxygenated isoprenoid lipids (HOIL) that are produced by fungi and fungal endophytes from various ecological niches, both terrestrial and aquatic. Steroids were distributed as from edible cultivated fungi, as well as fungi collected in forests. Fungal endophytes were generally isolated from plants and cultured to obtain sufficient biomass. Marine fungi were obtained from marine brown and red algae and marine invertebrates such as sponges, corals, worms, crustacea or from marine sediments. HOIL isolated from the terrestrial ecosystem have the pharmacological potential on anti-hypercholesterolemic, anti-neoplastic, anti-eczematic and anti-inflammatory activity estimated with a confidence of 84-90%. HOIL that produced by marine fungal species are predicted as having anti-inflammatory and anti-hypercholesterolemic activity with a confidence of 82-91%. In addition, they may have potential acetylcholinesterase and cell adhesion molecule inhibitors estimated with a confidence of 86-88%.
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Affiliation(s)
- Nick Savidov
- Centre for Applied Research and Innovation, Lethbridge College, 3000 College Drive South, Lethbridge AB T1K 1L6, Canada
| | | | | | - Valery M Dembitsky
- Centre for Applied Research and Innovation, Lethbridge College, 3000 College Drive South, Lethbridge AB T1K 1L6, Canada; N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russian Federation; National Scientific Center of Marine Biology, Vladivostok 690041, Russian Federation.
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108
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Sutyak KB, Lee W, Zavalij PV, Gutierrez O, Davis JT. Templating and Catalyzing [2+2] Photocycloaddition in Solution Using a Dynamic G‐Quadruplex. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Keith B. Sutyak
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Wes Lee
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Peter V. Zavalij
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Osvaldo Gutierrez
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Jeffery T. Davis
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
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109
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Li MB, Posevins D, Gustafson KPJ, Tai CW, Shchukarev A, Qiu Y, Bäckvall JE. Diastereoselective Cyclobutenol Synthesis: A Heterogeneous Palladium-Catalyzed Oxidative Carbocyclization-Borylation of Enallenols. Chemistry 2018; 25:210-215. [PMID: 30307089 DOI: 10.1002/chem.201805118] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Indexed: 12/20/2022]
Abstract
A highly selective and efficient oxidative carbocyclization/borylation of enallenols catalyzed by palladium immobilized on amino-functionalized siliceous mesocellular foam (Pd-AmP-MCF) was developed for diastereoselective cyclobutenol synthesis. The heterogeneous palladium catalyst can be recovered and recycled without any observed loss of activity or selectivity. The high diastereoselectivity of the reaction is proposed to originate from a directing effect of the enallenol hydroxyl group. Optically pure cyclobutenol synthesis was achieved by the heterogeneous strategy by using chiral enallenol obtained from kinetic resolution.
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Affiliation(s)
- Man-Bo Li
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Karl P J Gustafson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Cheuk-Wai Tai
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | | | - Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
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110
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Kashyap A, Bokosike TK, Bhuvanesh N, Pattabiraman M. Stereo- and regioselective photocycloaddition of extended alkenes using γ-cyclodextrin. Org Biomol Chem 2018; 16:6870-6875. [PMID: 30229798 PMCID: PMC6215711 DOI: 10.1039/c8ob01966e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoexcitation of dibenzalacetones (1a-d) in homogeneous media and solid state yields a mixture of products with poor conversions. Irradiation of the reactants complexed to γ-cyclodextrin predominantly affords a single dimer (syn adduct 6) despite the possibility for several monomeric and dimeric products. High selectivity in the cavitand-mediated reaction along with the structural characterization of the inclusion complex provides insight into the supramolecular interactions that drive the self-assembly of the host-guest system.
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Affiliation(s)
- Akshay Kashyap
- Department of Chemistry, University of Nebraska Kearney, NE-68845, USA.
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111
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Xu GQ, Feng ZT, Xu JT, Wang ZY, Qin Y, Xu PF. Transition-Metal-Free Selective C-H Benzylation of Tertiary Arylamines by a Dearomatization-Aromatization Sequence. Chemistry 2018; 24:13778-13782. [PMID: 30048022 DOI: 10.1002/chem.201803211] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Indexed: 01/29/2023]
Abstract
Due to the significance of hybrid systems in drug discovery, there is an urgent need to assemble multiple biologically active ingredients into a single molecule. Here, we report a general transition-metal-free selective C-H benzylation of tertiary arylamines in good to excellent yields with a broad substrate scope and high functional-group tolerance under mild conditions. Besides arylamines, some other benzene derivatives also readily furnished the corresponding diaryl methane derivatives with this protocol. A series of control experiments and theoretical calculations indicated that this transition-metal-free reaction is a dearomatization-aromatization process.
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Affiliation(s)
- Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P.R. China.,Institute of Nanoscience and Nanotechnology, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, P.R. China
| | - Zhi-Tao Feng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P.R. China
| | - Ji-Tao Xu
- 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
| | - Yong Qin
- Institute of Nanoscience and Nanotechnology, School of Physical Science and Technology, 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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112
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Peroxy steroids derived from plant and fungi and their biological activities. Appl Microbiol Biotechnol 2018; 102:7657-7667. [PMID: 29987343 DOI: 10.1007/s00253-018-9211-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 06/04/2018] [Accepted: 06/30/2018] [Indexed: 01/13/2023]
Abstract
Peroxides represent a large and interesting group of biologically active natural compounds. All these metabolites contain a peroxide group (R-O-O-R). This review describes studies of more than 60 peroxides isolated from plants and fungi. Most of the plant peroxy steroids exhibit high antiprotozoal (Plasmodium) activity with a confidence of up to 95%, while steroids harvested from fungi show more antineoplastic activity with a confidence of up to 94%. In addition, more than 20 different activities of both groups of peroxides with a probability of 78 to 90% have also been predicted using computer program PASS.
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113
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Qin H, Chen J, Li K, He Z, Zhou Y, Fan B. Nickel-Catalyzed Asymmetric [2+2] Cycloaddition Reaction of Hetero-Bicyclic Alkenes with Internal Alkynes. Chem Asian J 2018; 13:2431-2434. [PMID: 29968294 DOI: 10.1002/asia.201800492] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 05/14/2018] [Indexed: 12/28/2022]
Abstract
Enantioselective [2+2] cycloaddition reaction of azabenzonorbornadienes and oxabenzonorbornadienes with internal alkynes has been enabled by a catalyst system comprising Ni(COD)2 and (R)-SIPHOS-Ph-Mor. This transformation represents the first asymmetric [2+2] cycloaddition reaction of azabenzonorbornadienes with internal alkynes, providing a straightforward method to prepare four-membered carbocycles.
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Affiliation(s)
- Hongyu Qin
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Jingchao Chen
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Kangkui Li
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Zhenxiu He
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Yongyun Zhou
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Baomin Fan
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China.,Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yuehua Street, Kunming, 650500, China
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114
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Bai YB, Luo Z, Wang Y, Gao JM, Zhang L. Au-Catalyzed Intermolecular [2+2] Cycloadditions between Chloroalkynes and Unactivated Alkenes. J Am Chem Soc 2018; 140:5860-5865. [PMID: 29618202 PMCID: PMC6488029 DOI: 10.1021/jacs.8b01813] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The [2+2] cycloaddition is a versatile strategy for the synthesis of strained cyclobutenes of high synthetic value. In this study, two efficient intermolecular [2+2] cycloadditions between two different types of chloroalkynes and unactivated alkene are realized with gold catalysis. Of significance is that the reaction works with challenging monosubstituted unactivated alkenes, which is unprecedented in gold catalysis and scarcely documented in other metal-catalyzed/promoted reactions; moreover, the reaction exhibits excellent regioselectivities, which are much better than those reported in literature. With 1,2-disubstituted unactivated alkenes, the reaction is largely stereospecific. The cyclobutene products can be prepared in nearly gram scale and readily undergo further reactions including various cross-coupling reactions using the C(sp2)-Cl and/or C(sp2)-SPh bond, which in turn substantially broaden the scope of accessible cyclobutenes and enhance the synthetic utility of this bimolecular reaction.
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Affiliation(s)
- Yu-Bin Bai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zaigang Luo
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Yuguang Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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115
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Xu GQ, Xu JT, Feng ZT, Liang H, Wang ZY, Qin Y, Xu PF. Dual C(sp3
)−H Bond Functionalization of N-Heterocycles through Sequential Visible-Light Photocatalyzed Dehydrogenation/[2+2] Cycloaddition Reactions. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710523] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P. R. China
- Institute of Nanoscience and Nanotechnology; School of Physical Science and Technology; Lanzhou University; Lanzhou 730000 P. R. China
| | - Ji-Tao Xu
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P. R. China
| | - Zhi-Tao Feng
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P. R. China
| | - Hui Liang
- 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
| | - Yong Qin
- Institute of Nanoscience and Nanotechnology; School of Physical Science and Technology; 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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116
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Xu GQ, Xu JT, Feng ZT, Liang H, Wang ZY, Qin Y, Xu PF. Dual C(sp 3 )-H Bond Functionalization of N-Heterocycles through Sequential Visible-Light Photocatalyzed Dehydrogenation/[2+2] Cycloaddition Reactions. Angew Chem Int Ed Engl 2018; 57:5110-5114. [PMID: 29473702 DOI: 10.1002/anie.201710523] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Indexed: 02/04/2023]
Abstract
Herein we describe a mild method for the dual C(sp3 )-H bond functionalization of saturated nitrogen-containing heterocycles through a sequential visible-light photocatalyzed dehydrogenation/[2+2] cycloaddition procedure. As a complementary approach to the well-established use of iminium ion and α-amino radical intermediates, the elusive cyclic enamine intermediates were effectively generated by photoredox catalysis under mild conditions and efficiently captured by acetylene esters to form a wide array of bicyclic amino acid derivatives, thus enabling the simultaneous functionalization of two vicinal C(sp3 )-H bonds.
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Affiliation(s)
- Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.,Institute of Nanoscience and Nanotechnology, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Ji-Tao Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Zhi-Tao Feng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Hui Liang
- 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
| | - Yong Qin
- Institute of Nanoscience and Nanotechnology, School of Physical Science and Technology, 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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117
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Wu QF, Wang XB, Shen PX, Yu JQ. Enantioselective C-H Arylation and Vinylation of Cyclobutyl Carboxylic Amides. ACS Catal 2018. [PMID: 29531850 DOI: 10.1021/acscatal.8b00069] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Chiral mono-N-protected aminomethyl oxazoline (MPAO) ligands are found to promote enantioselective C-H arylation and vinylation of the cyclobutyl carboxylic acid derivatives via Pd(II)/Pd(IV) redox catalysis. This ligand scaffold overcame two important limitations of the previous MPAHA (mono-N-protected α-amino-O-methylhydroxamic acid) ligands-enabled asymmetric C-H activation/C-C coupling reactions of cyclic carboxylic amides through Pd(II)/Pd(0) catalysis: substrates containing α-hydrogen atoms are not compatible; vinylation has not been developed. Sequential C-H arylation and vinylation of cyclobutanes are also accomplished to construct three consecutive chiral centers on the crowded cyclobutane rings, rendering this reaction highly versatile for the preparation of chiral cyclobutanes.
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Affiliation(s)
- Qing-Feng Wu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Xiao-Bing Wang
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Peng-Xiang Shen
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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118
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Advances in Enantioselective C–H Activation/Mizoroki-Heck Reaction and Suzuki Reaction. Catalysts 2018. [DOI: 10.3390/catal8020090] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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119
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Hazra CK, Jeong J, Kim H, Baik MH, Park S, Chang S. Reductive Carbocyclization of Homoallylic Alcohols to syn
-Cyclobutanes by a Boron-Catalyzed Dual Ring-Closing Pathway. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713285] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chinmoy Kumar Hazra
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Jinhoon Jeong
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Hyunjoong Kim
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Sehoon Park
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
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120
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Hazra CK, Jeong J, Kim H, Baik MH, Park S, Chang S. Reductive Carbocyclization of Homoallylic Alcohols to syn
-Cyclobutanes by a Boron-Catalyzed Dual Ring-Closing Pathway. Angew Chem Int Ed Engl 2018; 57:2692-2696. [DOI: 10.1002/anie.201713285] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Chinmoy Kumar Hazra
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Jinhoon Jeong
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Hyunjoong Kim
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Sehoon Park
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations; Institute for Basic Science (IBS); Daejeon 305-701 South Korea
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); Daejeon 305-701 South Korea
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121
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Throup A, Patterson LH, Sheldrake HM. Intramolecular thermal stepwise [2 + 2] cycloadditions: investigation of a stereoselective synthesis of [n.2.0]-bicyclolactones. Org Biomol Chem 2018; 14:9554-9559. [PMID: 27722445 PMCID: PMC5066561 DOI: 10.1039/c6ob01661h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method for the synthesis of highly functionalised cyclobutenes.
Fused cyclobutanes are found in a range of natural products and formation of these motifs in a straightforward and easy manner represents an interesting synthetic challenge. To this end we investigated an intramolecular variant of the thermal enamine [2 + 2] cyclisation, developing a diastereoselective intramolecular enamine [2 + 2] cyclisation furnishing δ lactone and lactam fused cyclobutenes in good yield and excellent diastereoselectivity.
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Affiliation(s)
- Adam Throup
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK.
| | - Laurence H Patterson
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK.
| | - Helen M Sheldrake
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK.
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122
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Fan Q, Tan H, Li P, Yan H. Hetero-intermolecular [2+2] photocycloaddition of 1,4-dihydropyridines: a combined experimental and DFT study. NEW J CHEM 2018. [DOI: 10.1039/c8nj02192a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A detailed DFT mechanistic study of hetero-intermolecular [2+2] photocycloaddition of 1,4-DHPs was carried out for investigating the regioselectivity of such transformation.
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Affiliation(s)
- Qiangwen Fan
- College of Life Science and Bioengineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Hongbo Tan
- International Academy of Targeted Therapeutics and Innovation
- Chongqing University of Arts and Sciences
- Chongqing
- China
| | - Peng Li
- College of Life Science and Bioengineering
- Beijing University of Technology
- Beijing 100124
- China
| | - Hong Yan
- College of Life Science and Bioengineering
- Beijing University of Technology
- Beijing 100124
- China
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123
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Osorio-Nieto U, Vázquez-Amaya LY, Höpfl H, Quintero L, Sartillo-Piscil F. The direct and highly diastereoselective synthesis of 3,4-epoxy-2-piperidones. Application to the total synthesis and absolute configurational assignment of 3α,4α-epoxy-5β-pipermethystine. Org Biomol Chem 2018; 16:77-88. [DOI: 10.1039/c7ob02700a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The substrate-controlled asymmetric total synthesis and absolute configurational assignment of biologically active 3α,4α-epoxy-5β-pipermethystine is reported.
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Affiliation(s)
- Urbano Osorio-Nieto
- Centro de Investigación de la Facultad de Ciencias Químicas
- Benemérita Universidad Autónoma de Puebla (BUAP)
- Puebla
- México
| | - Laura Y. Vázquez-Amaya
- Centro de Investigación de la Facultad de Ciencias Químicas
- Benemérita Universidad Autónoma de Puebla (BUAP)
- Puebla
- México
| | - Herbert Höpfl
- Centro de Investigaciones Químicas
- Instituto de Investigación en Ciencias Básicas y Aplicadas
- Universidad Autónoma del Estado de Morelos
- Cuernavaca
- México
| | - Leticia Quintero
- Centro de Investigación de la Facultad de Ciencias Químicas
- Benemérita Universidad Autónoma de Puebla (BUAP)
- Puebla
- México
| | - Fernando Sartillo-Piscil
- Centro de Investigación de la Facultad de Ciencias Químicas
- Benemérita Universidad Autónoma de Puebla (BUAP)
- Puebla
- México
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124
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Chang Z, Boyaud F, Guillot R, Boddaert T, Aitken DJ. A Photochemical Route to 3- and 4-Hydroxy Derivatives of 2-Aminocyclobutane-1-carboxylic Acid with an all-cis Geometry. J Org Chem 2017; 83:527-534. [DOI: 10.1021/acs.joc.7b02559] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zong Chang
- CP3A
Organic Synthesis Group, ICMMO, CNRS UMR 8182, Université Paris
Sud, Université Paris Saclay, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
| | - France Boyaud
- CP3A
Organic Synthesis Group, ICMMO, CNRS UMR 8182, Université Paris
Sud, Université Paris Saclay, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
| | - Régis Guillot
- Services
Communs, ICMMO, CNRS UMR 8182, Université Paris Sud, Université Paris Saclay, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
| | - Thomas Boddaert
- CP3A
Organic Synthesis Group, ICMMO, CNRS UMR 8182, Université Paris
Sud, Université Paris Saclay, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
| | - David J. Aitken
- CP3A
Organic Synthesis Group, ICMMO, CNRS UMR 8182, Université Paris
Sud, Université Paris Saclay, 15 rue Georges Clemenceau, 91405 Orsay Cedex, France
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125
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Pattabiraman M, Sivaguru J, Ramamurthy V. Cucurbiturils as Reaction Containers for Photocycloaddition of Olefins. Isr J Chem 2017. [DOI: 10.1002/ijch.201700100] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Jayaraman Sivaguru
- Department of Chemistry and Center for Photochemical Sciences Bowling Green State University Bowling Green, OH USA
| | - V. Ramamurthy
- Department of Chemistry University of Miami Coral Gables, FL USA
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126
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Zhu RY, Liu LY, Park HS, Hong K, Wu Y, Senanayake CH, Yu JQ. Versatile Alkylation of (Hetero)Aryl Iodides with Ketones via β-C(sp 3)-H Activation. J Am Chem Soc 2017; 139:16080-16083. [PMID: 29086554 DOI: 10.1021/jacs.7b09761] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report Pd(II)-catalyzed β-C(sp3)-H (hetero)arylation of a variety of ketones using a commercially available 2,2-dimethyl aminooxyacetic acid auxiliary. Facile installation and removal of the auxiliary as well as its superior scope for both ketones and (hetero)aryl iodides overcome the significant limitations of the previously reported β-C(sp3)-H arylation of ketones. The ready availability of ketones renders this reaction a broadly useful method for alkyl-(hetero)aryl coupling involving both primary and secondary alkyls.
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Affiliation(s)
- Ru-Yi Zhu
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Luo-Yan Liu
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Han Seul Park
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Kai Hong
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Yongwei Wu
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Chris H Senanayake
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals Inc. , Ridgefield, Connecticut 06877, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
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127
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Al-Khdhairawi AAQ, Krishnan P, Mai CW, Chung FFL, Leong CO, Yong KT, Chong KW, Low YY, Kam TS, Lim KH. A Bis-benzopyrroloisoquinoline Alkaloid Incorporating a Cyclobutane Core and a Chlorophenanthroindolizidine Alkaloid with Cytotoxic Activity from Ficus fistulosa var. tengerensis. JOURNAL OF NATURAL PRODUCTS 2017; 80:2734-2740. [PMID: 28926237 DOI: 10.1021/acs.jnatprod.7b00500] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Tengerensine (1), isolated as a racemate and constituted from a pair of bis-benzopyrroloisoquinoline enantiomers, and tengechlorenine (2), purified as a scalemic mixture and constituted from a pair of chlorinated phenanthroindolizidine enantiomers, were isolated from the leaves of Ficus fistulosa var. tengerensis, along with three other known alkaloids. The structures of 1 and 2 were determined by spectroscopic data interpretation and X-ray diffraction analysis. The enantiomers of 1 were separated by chiral-phase HPLC, and the absolute configurations of (+)-1 and (-)-1 were established via experimental and calculated ECD data. Compound 1 is notable in being a rare unsymmetrical cyclobutane adduct and is the first example of a dimeric benzopyrroloisoquinoline alkaloid, while compound 2 represents the first naturally occurring halogenated phenanthroindolizidine alkaloid. Compound (+)-1 displayed a selective in vitro cytotoxic effect against MDA-MB-468 cells (IC50 7.4 μM), while compound 2 showed pronounced in vitro cytotoxic activity against all three breast cancer cell lines tested (MDA-MB-468, MDA-MB-231, and MCF7; IC50 values of 0.038-0.91 μM).
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Affiliation(s)
| | - Premanand Krishnan
- School of Pharmacy, University of Nottingham Malaysia Campus , Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Chun-Wai Mai
- School of Pharmacy, International Medical University , Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Felicia Fei-Lei Chung
- Center for Cancer and Stem Cell Research, International Medical University , Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Chee-Onn Leong
- School of Pharmacy, International Medical University , Bukit Jalil, 57000 Kuala Lumpur, Malaysia
- Center for Cancer and Stem Cell Research, International Medical University , Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Kien-Thai Yong
- Institute of Biological Sciences, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Kam-Weng Chong
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Kuan-Hon Lim
- School of Pharmacy, University of Nottingham Malaysia Campus , Jalan Broga, 43500 Semenyih, Selangor, Malaysia
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128
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Wang Z, Miller B, Mabin M, Shahni R, Wang ZD, Ugrinov A, Chu QR. Cyclobutane-1,3-Diacid (CBDA): A Semi-Rigid Building Block Prepared by [2+2] Photocyclization for Polymeric Materials. Sci Rep 2017; 7:13704. [PMID: 29057941 PMCID: PMC5651925 DOI: 10.1038/s41598-017-13983-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 10/04/2017] [Indexed: 01/30/2023] Open
Abstract
A previously overlooked building block, cyclobutane-1,3-diacid (CBDA), is introduced to materials synthesis due to its great potentials. As an example of CBDA, α-truxillic acid or 2,4-diphenylcyclobutane-1,3-dicarboxylic acid, was readily synthesized from commercially available trans-cinnamic acid. This CBDA showed outstanding stability both in sunlight and upon heating. While its two carboxylic acid groups can be readily utilized in connecting with other molecules to form new materials, the cyclobutane ring was able to tolerate acid and base treatments showing good chemical stability. A series of cyclobutane-containing polymers (CBPs), namely poly-α-truxillates, were obtained by condensation between α-truxillic acid and diols including ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-petanediol, and 1,6-hexanediol. The structures of these poly-α-truxillates were analyzed by NMR, FT-IR, and HRMS. Powder X-ray diffraction results of the poly-α-truxillates indicated that they are semi-crystalline materials. Preliminary thermal, chemical, and photochemical tests showed that the poly-α-truxillates exhibited comparable stabilities to PET.
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Affiliation(s)
- Zhihan Wang
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Benjamin Miller
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Micah Mabin
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Rahul Shahni
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Zijun D Wang
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Angel Ugrinov
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND, 58102, USA
| | - Qianli R Chu
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA.
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129
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Wang C, Lu Z. Intermolecular [2 + 2] Cycloaddition of 1,4-Dihydropyridines with Olefins via Energy Transfer. Org Lett 2017; 19:5888-5891. [DOI: 10.1021/acs.orglett.7b02881] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chengfeng Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Zhan Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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130
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Jiao Z, Shi Q, Zhou JS. Asymmetric Intermolecular Heck Reaction of Propargylic Acetates and Cycloalkenes to Access Fused Cyclobutenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708435] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Qi Shi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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131
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Jiao Z, Shi Q, Zhou JS. Asymmetric Intermolecular Heck Reaction of Propargylic Acetates and Cycloalkenes to Access Fused Cyclobutenes. Angew Chem Int Ed Engl 2017; 56:14567-14571. [DOI: 10.1002/anie.201708435] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 09/28/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Qi Shi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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132
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García-Morales C, Ranieri B, Escofet I, López-Suarez L, Obradors C, Konovalov AI, Echavarren AM. Enantioselective Synthesis of Cyclobutenes by Intermolecular [2+2] Cycloaddition with Non-C 2 Symmetric Digold Catalysts. J Am Chem Soc 2017; 139:13628-13631. [PMID: 28922911 PMCID: PMC5679663 DOI: 10.1021/jacs.7b07651] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 01/12/2023]
Abstract
The enantioselective intermolecular gold(I)-catalyzed [2+2] cycloaddition of terminal alkynes and alkenes has been achieved using non-C2-chiral Josiphos digold(I) complexes as catalysts, by the formation of the monocationic complex. This new approach has been applied to the enantioselective total synthesis of rumphellaone A.
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Affiliation(s)
- Cristina García-Morales
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Beatrice Ranieri
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Imma Escofet
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Laura López-Suarez
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Carla Obradors
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Andrey I. Konovalov
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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133
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Shen L, Zhao K, Doitomi K, Ganguly R, Li YX, Shen ZL, Hirao H, Loh TP. Lewis Acid-Catalyzed Selective [2 + 2]-Cycloaddition and Dearomatizing Cascade Reaction of Aryl Alkynes with Acrylates. J Am Chem Soc 2017; 139:13570-13578. [PMID: 28880536 DOI: 10.1021/jacs.7b07997] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Combined Lewis acid, consisting of two or more Lewis acids, sometimes shows unique catalytic ability, and it may promote reactions which could not be catalyzed by any of the Lewis acids solely. On the other hand, the development of efficient methods for the facile synthesis of cyclobutenes and densely functionalized decalins is an attractive target for synthetic chemists due to their versatile synthetic utilities and widespread occurrence in natural products. Herein, we wish to report an efficient method for the assembly of cyclobutenes and densely functionalized decalin skeletons through In(tfacac)3-TMSBr catalyzed selective [2 + 2]-cycloaddition and dearomatizing cascade reaction of aryl alkynes with acrylates with high chemo- and stereoselectivity. The obtained cyclobutene could be easily converted into cyclobutane as well as synthetically useful 1,4- and 1,5-diketones with high chemo- and stereoselectivity. On the basis of mechanistic studies, plausible reaction mechanisms were proposed for both the [2 + 2]-cycloaddition and the dearomatizing cascade reaction. Finally, the computational studies of reaction mechanisms were conducted, and the results suggest that the combined Lewis acid could efficiently promote both reactions.
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Affiliation(s)
- Liang Shen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Kai Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu, P. R. China , 210009.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Kazuki Doitomi
- Department of Chemistry, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Yong-Xin Li
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Zhi-Liang Shen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu, P. R. China , 210009.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Hajime Hirao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371.,Department of Chemistry, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu, P. R. China , 210009.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
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134
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Barra L, Dickschat JS. Sceptrin - Enantioselective Synthesis of a Tetrasubstituted all-trans
Cyclobutane Key Intermediate. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700882] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Lena Barra
- Kekulé-Institute of Organic Chemistry and Biochemistry; Rheinische Friedrich Wilhelms University of Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Jeroen S. Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry; Rheinische Friedrich Wilhelms University of Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
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135
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Alcaide B, Almendros P, Lázaro-Milla C. Regioselective Synthesis of Heteroatom-Functionalized Cyclobutene-triflones and Cyclobutenones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700492] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos; Departamento de Química Orgánica I; Unidad Asociada al CSIC; Facultad de Química; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - Pedro Almendros
- Instituto de Química Orgánica General; Consejo Superior de Investigaciones Científicas; IQOG-CSIC; Juan de la Cierva 3 28006 Madrid Spain
| | - Carlos Lázaro-Milla
- Grupo de Lactamas y Heterociclos Bioactivos; Departamento de Química Orgánica I; Unidad Asociada al CSIC; Facultad de Química; Universidad Complutense de Madrid; 28040 Madrid Spain
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136
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Zhao J, Brosmer JL, Tang Q, Yang Z, Houk KN, Diaconescu PL, Kwon O. Intramolecular Crossed [2+2] Photocycloaddition through Visible Light-Induced Energy Transfer. J Am Chem Soc 2017; 139:9807-9810. [PMID: 28683547 DOI: 10.1021/jacs.7b05277] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Herein, we present the intramolecular [2+2] cycloadditions of dienones promoted through sensitization, using a polypyridyl iridium(III) catalyst, to form bridged cyclobutanes. In contrast to previous examples of straight [2+2] cycloadditions, these efficient crossed additions were achieved under irradiation with visible light. The reactions delivered desired bridged benzobicycloheptanone products with excellent regioselectivity in high yields (up to 96%). This process is superior to previous syntheses of benzobicyclo[3.1.1]heptanones, which are readily converted to B-norbenzomorphan analogues of biological significance. Electrochemical, computational, and spectroscopic studies substantiated the mechanism of triplet energy transfer and explained the unusual regiocontrol.
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Affiliation(s)
- Jiannan Zhao
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
| | - Jonathan L Brosmer
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
| | - Qingxuan Tang
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
| | - Zhongyue Yang
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
| | - Paula L Diaconescu
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095-1569, United States
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137
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Chen D, Zhang L, Yao J, Zhou H. Construction of Polysubstituted 1,2-Dihydrocyclobuta[b]naphthalenes and 1,2-Dihydrocyclobuta[b]anthracenes with Photoluminescence. J Org Chem 2017; 82:6202-6209. [PMID: 28508640 DOI: 10.1021/acs.joc.7b00762] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A facile protocol for the synthesis of polysubstituted 1,2-dihydrocyclobuta[b]naphthalenes and 1,2-dihydrocyclobuta[b]anthracenes was developed via a sequence of base-promoted 1,5-H shift, intramolecular [2 + 2] cycloaddition, and aromatization. The synthesized 1,2-dihydrocyclobuta[b]anthracenes exhibited bright blue emissions in solution and strong yellow emissions in solid, which made them possible candidates for optoelectronic conjugated materials.
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Affiliation(s)
- Dianpeng Chen
- Department of Chemistry, Zhejiang University (Campus Xixi), Hangzhou 310028, People's Republic of China.,College of Biological, Chemical Sciences and Engineering, Jiaxing University , Jiaxing 314001, People's Rupublic of China
| | - Lianpeng Zhang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University , Jiaxing 314001, People's Rupublic of China
| | - Jinzhong Yao
- College of Biological, Chemical Sciences and Engineering, Jiaxing University , Jiaxing 314001, People's Rupublic of China
| | - Hongwei Zhou
- Department of Chemistry, Zhejiang University (Campus Xixi), Hangzhou 310028, People's Republic of China.,College of Biological, Chemical Sciences and Engineering, Jiaxing University , Jiaxing 314001, People's Rupublic of China
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138
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Deng Y, Massey LA, Zavalij PY, Doyle MP. Catalytic Asymmetric [3+1]‐Cycloaddition Reaction of Ylides with Electrophilic Metallo‐enolcarbene Intermediates. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704069] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yongming Deng
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Lynée A. Massey
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry University of Maryland College Park MD 20742 USA
| | - Michael P. Doyle
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
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139
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Deng Y, Massey LA, Zavalij PY, Doyle MP. Catalytic Asymmetric [3+1]-Cycloaddition Reaction of Ylides with Electrophilic Metallo-enolcarbene Intermediates. Angew Chem Int Ed Engl 2017; 56:7479-7483. [PMID: 28493594 DOI: 10.1002/anie.201704069] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Indexed: 11/06/2022]
Abstract
The first asymmetric [3+1]-cycloaddition was successfully achieved by copper(I) triflate/double-sidearmed bisoxazoline complex catalyzed reactions of β-triisopropylsilyl-substituted enoldiazo compounds with sulfur ylides. This methodology delivered a series of chiral cyclobutenes in good yields with high enantio- and diastereoselectivities (up to 99 % ee, and >20:1 d.r.). Additionally, the [3+1]-cycloaddition of catalytically generated metallo-enolcarbenes was successfully extended to reaction with a stable benzylidene dichlororuthenium complex.
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Affiliation(s)
- Yongming Deng
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Lynée A Massey
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Peter Y Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
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140
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Wang YS, Li BT, Liu SX, Wen ZQ, Yang JH, Zhang HB, Hao XJ. Anisucoumaramide, a Bioactive Coumarin from Clausena anisum-olens. JOURNAL OF NATURAL PRODUCTS 2017; 80:798-804. [PMID: 28368606 DOI: 10.1021/acs.jnatprod.6b00391] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new coumarin, anisucoumaramide (1), and a new δ-truxinate derivative, anisumic acid (2), were isolated from Clausena anisum-olens. Their structures were elucidated from extensive NMR and MS data. The absolute configurations of the coumarins were assigned using the experimental and calculated electronic circular dichroism data. Anisucoumaramide (1) represents the first example of a naturally occurring coumarin of which the terpenoidal side chain does not comply with the biosynthesis isoprene rule due to the presence of an unprecedented acetamido motif directly connected with the terpenoidal side chain. The δ-truxinate derivative was isolated from Clausena species for the first time. Compound 1 showed high selectivity for the MAO-B isoenzyme and inhibitory activity in the nanomolar range. Putative biosynthesis pathways toward 1 and 2 are proposed.
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Affiliation(s)
- Yun-Song Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University , Kunming 650091, People's Republic of China
| | - Bi-Tao Li
- First Affiliated Hospital of Kunming Medical University , Kunming 650031, People's Republic of China
| | - Shi-Xi Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University , Kunming 650091, People's Republic of China
| | - Zheng-Qi Wen
- First Affiliated Hospital of Kunming Medical University , Kunming 650031, People's Republic of China
| | - Jing-Hua Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University , Kunming 650091, People's Republic of China
| | - Hong-Bin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University , Kunming 650091, People's Republic of China
| | - Xiao-Jiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , 132 Lanhei Road, Kunming 650201, People's Republic of China
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141
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Lopchuk JM, Fjelbye K, Kawamata Y, Malins LR, Pan CM, Gianatassio R, Wang J, Prieto L, Bradow J, Brandt TA, Collins MR, Elleraas J, Ewanicki J, Farrell W, Fadeyi OO, Gallego GM, Mousseau JJ, Oliver R, Sach NW, Smith JK, Spangler JE, Zhu H, Zhu J, Baran PS. Strain-Release Heteroatom Functionalization: Development, Scope, and Stereospecificity. J Am Chem Soc 2017; 139:3209-3226. [PMID: 28140573 PMCID: PMC5334783 DOI: 10.1021/jacs.6b13229] [Citation(s) in RCA: 166] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
![]()
Driven by the ever-increasing pace
of drug discovery and the need
to push the boundaries of unexplored chemical space, medicinal chemists
are routinely turning to unusual strained bioisosteres such
as bicyclo[1.1.1]pentane, azetidine, and cyclobutane to modify their
lead compounds. Too often, however, the difficulty of installing these
fragments surpasses the challenges posed even by the construction
of the parent drug scaffold. This full account describes the development
and application of a general strategy where spring-loaded, strained
C–C and C–N bonds react with amines to allow for the
“any-stage” installation of small, strained ring systems.
In addition to the functionalization of small building blocks and
late-stage intermediates, the methodology has been applied to bioconjugation
and peptide labeling. For the first time, the stereospecific strain-release
“cyclopentylation” of amines, alcohols, thiols,
carboxylic acids, and other heteroatoms is introduced. This report
describes the development, synthesis, scope of reaction, bioconjugation,
and synthetic comparisons of four new chiral “cyclopentylation”
reagents.
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Affiliation(s)
- Justin M Lopchuk
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kasper Fjelbye
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Yu Kawamata
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Lara R Malins
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Chung-Mao Pan
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan Gianatassio
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jie Wang
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Liher Prieto
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - James Bradow
- Pfizer Worldwide Research and Development , Eastern Point Road, Groton, Connecticut 06340, United States
| | - Thomas A Brandt
- Pfizer Worldwide Research and Development , Eastern Point Road, Groton, Connecticut 06340, United States
| | - Michael R Collins
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jeff Elleraas
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jason Ewanicki
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - William Farrell
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Olugbeminiyi O Fadeyi
- Pfizer Worldwide Research and Development , Eastern Point Road, Groton, Connecticut 06340, United States
| | - Gary M Gallego
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - James J Mousseau
- Pfizer Worldwide Research and Development , Eastern Point Road, Groton, Connecticut 06340, United States
| | - Robert Oliver
- Pfizer Worldwide Research and Development , Eastern Point Road, Groton, Connecticut 06340, United States
| | - Neal W Sach
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jason K Smith
- Pfizer Worldwide Research and Development , Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jillian E Spangler
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Huichin Zhu
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jinjiang Zhu
- Department of Chemistry, La Jolla Laboratories, Pfizer Inc. , 10770 Science Center Drive, San Diego, California 92121, United States
| | - Phil S Baran
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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142
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Dembitsky VM, Gloriozova TA, Poroikov VV. Pharmacological and Predicted Activities of Natural Azo Compounds. NATURAL PRODUCTS AND BIOPROSPECTING 2017; 7:151-169. [PMID: 28054247 PMCID: PMC5315673 DOI: 10.1007/s13659-016-0117-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 12/26/2016] [Indexed: 05/16/2023]
Abstract
This paper describes research on natural azo compounds isolated from fungi, plant, bacteria, and invertebrates. More than 120 biologically active diazene containing alkaloids demonstrate confirmed pharmacological activity, including antitumor, antimicrobial, and antibacterial effects. The structures, origin, and biological activities of azo compounds are reviewed. Utilizing the computer program PASS, some structure-activity relationship new activities are also predicted, pointing toward possible new applications of these compounds. This article emphasizes the role of natural azo compounds as an important source of drug prototypes and leads for drug discovery.
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Affiliation(s)
- Valery M Dembitsky
- National Scientific Center of Marine Biology, 17 Palchevsky Str., Vladivostok, Russia, 690041.
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143
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Pagire SK, Hossain A, Traub L, Kerres S, Reiser O. Photosensitised regioselective [2+2]-cycloaddition of cinnamates and related alkenes. Chem Commun (Camb) 2017; 53:12072-12075. [DOI: 10.1039/c7cc06710k] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A visible-light mediated, photocatalyzed strategy for the efficient synthesis of substituted cyclobutanes from cinnamates, styrenes, and chalcones is presented.
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Affiliation(s)
- Santosh K. Pagire
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Asik Hossain
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Lukas Traub
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Sabine Kerres
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Oliver Reiser
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
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144
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Zheng H, Xu C, Wang Y, Kang T, Liu X, Lin L, Feng X. Catalytic asymmetric [2+2] cycloaddition between quinones and fulvenes and a subsequent stereoselective isomerization to 2,3-dihydrobenzofurans. Chem Commun (Camb) 2017; 53:6585-6588. [DOI: 10.1039/c7cc03211k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A chiral Lewis acid catalyzed enantioselective [2+2] cycloaddition between quinones and fulvenes was reported for the first time. The method afforded a series of [6,4,5]-tricyclic cyclobutane derivatives in good yields with excellent regio- and stereoselectivities. Furthermore, the [2+2] adducts could be easily converted into formal [3+2] adducts efficiently and stereoselectively.
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Affiliation(s)
- Haifeng Zheng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Chaoran Xu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Yan Wang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Tengfei Kang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
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145
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146
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Zhu HT, Tong XJ, Zhou NN, Yang DS, Fan MJ. K2S2O8-promoted [2+2]-cycloaddition of benzyl-2-(3-hydroxypropynyl)-benzoates: A new route to polysubstituted cyclobutanes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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147
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Pollock JA, Wardell SE, Parent AA, Stagg DB, Ellison SJ, Alley HM, Chao CA, Lawrence SA, Stice JP, Spasojevic I, Baker JG, Kim SH, McDonnell DP, Katzenellenbogen JA, Norris JD. Inhibiting androgen receptor nuclear entry in castration-resistant prostate cancer. Nat Chem Biol 2016; 12:795-801. [PMID: 27501397 PMCID: PMC5030124 DOI: 10.1038/nchembio.2131] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 05/05/2016] [Indexed: 01/17/2023]
Abstract
Clinical resistance to the second-generation antiandrogen enzalutamide in castration-resistant prostate cancer (CRPC), despite persistent androgen receptor (AR) activity in tumors, highlights an unmet medical need for next-generation antagonists. We have identified and characterized tetra-aryl cyclobutanes (CBs) as a new class of competitive AR antagonists that exhibit a unique mechanism of action. These CBs are structurally distinct from current antiandrogens (hydroxyflutamide, bicalutamide, and enzalutamide) and inhibit AR-mediated gene expression, cell proliferation, and tumor growth in several models of CRPC. Conformational profiling revealed that CBs stabilize an AR conformation resembling an unliganded receptor. Using a variety of techniques, it was determined that the AR-CB complex was not recruited to AR-regulated promoters and, like apo AR, remains sequestered in the cytoplasm, bound to heat shock proteins. Thus, we have identified third-generation AR antagonists whose unique mechanism of action suggests that they may have therapeutic potential in CRPC.
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Affiliation(s)
- Julie A. Pollock
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801
| | - Suzanne E. Wardell
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Alexander A. Parent
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801
| | - David B. Stagg
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Stephanie J. Ellison
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Holly M. Alley
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Christina A. Chao
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Scott A. Lawrence
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - James P. Stice
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Ivan Spasojevic
- Department of Medicine, Duke University Medical Center, Durham, NC 27710
- Duke Cancer Institute, Pharmaceutical Research – PK/PD Core Laboratory, Durham, NC 27710
| | - Jennifer G. Baker
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - Sung Hoon Kim
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801
| | - Donald P. McDonnell
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
| | - John A. Katzenellenbogen
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801
| | - John D. Norris
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710
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148
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Zhao L, Zhang L, Fang DC. DFT Study on Rhodium-Catalyzed Intermolecular [2 + 2] Cycloaddition of Terminal Alkynes with Electron-Deficient Alkenes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00646] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liu Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Lei Zhang
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - De-Cai Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
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149
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Yi F, Huang B, Nie Q, Cai M. A heterogeneous gold(I)-catalyzed ring expansion of unactivated alkynylcyclopropanes with sulfonamides leading to (E)-2-alkylidenecyclobutanamines. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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150
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Zhu HT, Ke S, Zhou NN, Fan MJ, Yang DS. Regioselective Intermolecular [2 + 2]-Cycloaddition of α-Iodo-Unsaturated Ketones Promoted by Diisobutylaluminum Hydride. Org Lett 2016; 18:4554-7. [DOI: 10.1021/acs.orglett.6b02195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hai-Tao Zhu
- Shannxi Key Laboratory of
Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Sen Ke
- Shannxi Key Laboratory of
Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ni-Ni Zhou
- Shannxi Key Laboratory of
Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ming-Jin Fan
- Shannxi Key Laboratory of
Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - De-Suo Yang
- Shannxi Key Laboratory of
Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| |
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