1
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Hu Y, Wang Z, Xiang J, Ma J, Lin R, Wang J, Wu A. Synthesis of polysubstituted phenols via [3+3] condensation reaction from tricarbonyl compounds and readily available enaminones, cinnamaldehydes or arylformyl trifluoroacetones. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2
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Chen YC, Su SH, Huang JC, Chao CY, Sung PJ, Chen YF, Ko HH, Kuo YH. Tyrosinase Inhibitors Derived from Chemical Constituents of Dianella ensifolia. PLANTS (BASEL, SWITZERLAND) 2022; 11:2142. [PMID: 36015447 PMCID: PMC9414913 DOI: 10.3390/plants11162142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/12/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
Dianella ensifolia is a perennial herb with thickened rhizome and is widely distributed in tropical and subtropical regions of Asia, Australia, and the Pacific islands. This plant has the potential to be used as a source of herbal medicine. This study investigated further phytochemistry and tyrosinase inhibitory effect of some constituents isolated from D. ensifolia. Four new flavans, (2S)-4’-hydroxy-6,7-dimethoxyflavan (1), (2S)-3’,4’-dihydroxy-7-methoxy-8-methylflavan (2), (2S)-2’-hydroxy-7-methoxyflavan (3), and (2S,1′S)-4-hydroxy-4-(7-methoxy-8-methylchroman-2-yl)-cyclohex-2-enone (4), together with 67 known compounds, including 10 flavans (5−14), 5 flavanones (15−19), 3 flavone (20−22), 5 chalcones (23−27), 3 chromones (28−30), 15 aromatics (31−45), 7 phenylpropanoids (46−52), one lignan (53), 7 steroids (54−60), one monoterpene (61), one diterpene (62), 4 triterpenes (63−66), a carotenoid (67), 2 alkaloids (68 and 69), and 2 fatty acids (70 and 71) were isolated from D. ensifolia. Their structures were elucidated on the basis of physical and spectroscopic data analyses. Moreover, compounds 1−4, 8, 10−15, 20, 21, and 41 were evaluated for their mushroom tyrosinase inhibitory effect. Compounds 11 and 14 strongly inhibited mushroom tyrosinase activity with IC50 values of 8.6 and 14.5 μM, respectively.
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Affiliation(s)
- Yu-Chang Chen
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Sheng-Han Su
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Jheng-Cian Huang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Che-Yi Chao
- Department of Food Nutrition and Health Biotechnology, Asia University, Taichung 413, Taiwan
| | - Ping-Jyun Sung
- National Museum of Marine Biology and Aquarium, Pingtung 944, Taiwan
| | - Yih-Fung Chen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Horng-Huey Ko
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Drug Development and Value Creation Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Pharmacy, China Medical University, Taichung 404, Taiwan
- Chinese Medicine Research Center, China Medical University, Taichung 404, Taiwan
- Department of Biotechnology, Asia University, Taichung 413, Taiwan
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3
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Bayat M, Gheidari D. Green Lewis Acid Catalysis in Organic Reactions. ChemistrySelect 2022. [DOI: 10.1002/slct.202200774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mohammad Bayat
- Department of Chemistry Faculty of Science Imam Khomeini International University Qazvin
| | - Davood Gheidari
- Department of Chemistry Faculty of Science University of Guilan Rasht Iran
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4
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Wang J, Kleimeier NF, Johnson RN, Gozem S, Abplanalp MJ, Turner AM, Marks JH, Kaiser RI. Photochemically triggered cheletropic formation of cyclopropenone (c-C 3H 2O) from carbon monoxide and electronically excited acetylene. Phys Chem Chem Phys 2022; 24:17449-17461. [PMID: 35713004 DOI: 10.1039/d2cp01978g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For more than half a century, pericyclic reactions have played an important role in advancing our fundamental understanding of cycloadditions, sigmatropic shifts, group transfer reactions, and electrocyclization reactions. However, the fundamental mechanisms of photochemically activated cheletropic reactions have remained contentious. Here we report on the simplest cheletropic reaction: the [2+1] addition of ground state 18O-carbon monoxide (C18O, X1Σ+) to D2-acetylene (C2D2) photochemically excited to the first excited triplet (T1), second excited triplet (T2), and first excited singlet state (S1) at 5 K, leading to the formation of D2-18O-cyclopropenone (c-C3D218O). Supported by quantum-chemical calculations, our investigation provides persuasive testimony on stepwise cheletropic reaction pathways to cyclopropenone via excited state dynamics involving the T2 (non-adiabatic) and S1 state (adiabatic) of acetylene at 5 K, while the T1 state energetically favors an intermediate structure that directly dissociates after relaxing to the ground state. The agreement between experiments in low temperature ices and the excited state calculations signifies how photolysis experiments coupled with theoretical calculations can untangle polyatomic reactions with relevance to fundamental physical organic chemistry at the molecular level, thus affording a versatile strategy to unravel exotic non-equilibrium chemistries in cyclic, aromatic organics. Distinct from traditional radical-radical pathways leading to organic molecules on ice-coated interstellar nanoparticles (interstellar grains) in cold molecular clouds and star-forming regions, the photolytic formation of cyclopropenone as presented changes the perception of how we explain the formation of complex organics in the interstellar medium eventually leading to the molecular precursors of biorelevant molecules.
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Affiliation(s)
- Jia Wang
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA. .,W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - N Fabian Kleimeier
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA. .,W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - Rebecca N Johnson
- Department of Chemistry, Georgia State University, Atlanta, GA 30302, USA.
| | - Samer Gozem
- Department of Chemistry, Georgia State University, Atlanta, GA 30302, USA.
| | - Matthew J Abplanalp
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA. .,W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - Andrew M Turner
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA. .,W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - Joshua H Marks
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA. .,W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
| | - Ralf I Kaiser
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA. .,W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA
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5
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Sugimoto K. [Development of Novel Preparations for Nitrogen Heterocycles Based on Cascade Reactions]. YAKUGAKU ZASSHI 2018; 138:1151-1161. [PMID: 30175759 DOI: 10.1248/yakushi.18-00122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nitrogen heterocycles are important skeletons in biologically active compounds such as medicines and natural alkaloids. However, in terms of the efficiency of the synthetic process, the many synthetic steps required to achieve the target compounds with complex architectures pose a significant problem. To overcome this challenge, novel approaches were developed to afford biologically active heterocycles, 1,2-diazepines, pyrroloisoquinolines, and pyrrolizidines utilizing cascade reactions that enable multiple bond formation in a one-pot process. This review discusses three one-pot reactions: 1) 1,2-diazepine synthesis from cyclobutenones and lithiodiazoesters via cascade 4π-8π electrocyclization; 2) synthesis of pyrroloisoquinolines from alkynylimino esters triggered by gold-catalyzed azomethine ylide formation; and 3) pyrrolizidine synthesis via three-component coupling reactions of iminoesters, acetylenes, and maleimides through the gold-catalyzed azomethine ylide generation/[3+2]-cycloaddition/enamine cyclization reaction.
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Affiliation(s)
- Kenji Sugimoto
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
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6
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Zhou S, Yan BW, Fan SX, Tian JS, Loh TP. Regioselective Formal [4 + 2] Cycloadditions of Enaminones with Diazocarbonyls through Rh III-Catalyzed C-H Bond Functionalization. Org Lett 2018; 20:3975-3979. [PMID: 29888603 DOI: 10.1021/acs.orglett.8b01540] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A regioselective formal [4 + 2] cycloaddition for the assembly of highly functionalized benzene rings was successfully developed. In this reaction, olefinic C-H bond functionalization/cyclization cascade reaction followed by rearomatization led to the desired molecules in one step under mild reaction conditions. This protocol also displays a broad substrate scope and good tolerance to a wide range of functional groups. Additionally, the potential utility for the synthesis of highly conjugated polybenzenes and diversification of natural products was also demonstrated.
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Affiliation(s)
- Shuguang Zhou
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , P. R. China
| | - Bi-Wei Yan
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , P. R. China
| | - Shuai-Xin Fan
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , P. R. China
| | - Jie-Sheng Tian
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , P. R. China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , P. R. China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore.,Department of Chemistry , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China
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7
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Qiu H, Arman H, Hu W, Doyle MP. Intramolecular cycloaddition/rearrangement cascade from gold(iii)-catalysed reactions of propargyl aryldiazoesters with cinnamyl imines. Chem Commun (Camb) 2018; 54:12828-12831. [DOI: 10.1039/c8cc07885h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Surprising rearrangement of dihydroazepinyl aryldiazoacetates from a gold-catalysed [4+3]-cycloaddition to conjugated cycloheptene-1,4-dione-enamines.
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Affiliation(s)
- Huang Qiu
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
- Department of Chemistry
| | - Hadi Arman
- Department of Chemistry
- The University of Texas at San Antonio
- San Antonio
- USA
| | - Wenhao Hu
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Michael P. Doyle
- Department of Chemistry
- The University of Texas at San Antonio
- San Antonio
- USA
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8
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Cheng QQ, Deng Y, Lankelma M, Doyle MP. Cycloaddition reactions of enoldiazo compounds. Chem Soc Rev 2017; 46:5425-5443. [PMID: 28726896 PMCID: PMC5575991 DOI: 10.1039/c7cs00324b] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enoldiazo esters and amides have proven to be versatile reagents for cycloaddition reactions that allow highly efficient construction of various carbocycles and heterocycles. Their versatility is exemplified by (1) [2+n]-cycloadditions (n = 3, 4) by the enol silyl ether units of enoldiazo compounds with retention of the diazo functionality to furnish α-cyclic-α-diazo compounds that are themselves subject to further transformations of the diazo functional group; (2) [3+n]-cycloadditions (n = 1-5) by metallo-enolcarbenes formed by catalytic dinitrogen extrusion from enoldiazo compounds; (3) [2+n]-cycloadditions (n = 3, 4) by donor-acceptor cyclopropenes generated in situ from enoldiazo compounds that produce cyclopropane-fused ring systems. The role of dirhodium(ii) and the emergence of copper(i) catalysts are described, as are the different outcomes of reactions initiated with these catalysts. This comprehensive review on cycloaddition reactions of enoldiazo compounds, with emphasis on methodology development, mechanistic insight, and catalyst-controlled chemodivergence, aims to provide inspiration for future discoveries in the field and to catalyze the application of enoldiazo reagents by the wider synthetic community.
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Affiliation(s)
- Qing-Qing Cheng
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, USA.
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9
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Li X, Yu H, Huang Y. Amine-Triggered 6π-Electrocyclization-Aromatization Cascade of Ynedienamines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Xijian Li
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
- Institute of Materials; China Academy of Engineering Physics, Jiangyou, Mianyang; Sichuan 621907 People's Republic of China
| | - Huidong Yu
- Rongene Pharma Co., Ltd., Shenzhen; Guangdong 518054 People's Republic of China
| | - Yong Huang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
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10
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Yang X, Yang Y, Rees RJ, Yang Q, Tian Z, Xue Y. How Dirhodium Catalyst Controls the Enantioselectivity of [3 + 2]-Cycloaddition between Nitrone and Vinyldiazoacetate: A Density Functional Theory Study. J Org Chem 2016; 81:8082-6. [PMID: 27463104 DOI: 10.1021/acs.joc.6b01447] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The origin of enantioselectivity in the dirhodium-catalyzed [3 + 2]-cycloaddition of nitrone and vinyldiazoacetate has been investigated using dispersion-corrected density functional theory. Taking a more realistic account of bulky ligands in models of the dirhodium catalyst when investigating its catalytic behavior is crucial for describing the effects resulting from a high level of asymmetric induction. More than one active site can be located and the extra reactivity is provided by an electron-donation interaction between the substrate and an additional Rh2L4 catalyst.
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Affiliation(s)
- Xin Yang
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University , Chengdu 610064, P.R. China.,CSIRO Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - Yongsheng Yang
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University , Chengdu 610064, P.R. China
| | - Robert J Rees
- Data61
- CSIRO, 343 Royal Parade, Parkville, Victoria 3052, Australia
| | - Qi Yang
- CSIRO Manufacturing, Bayview Avenue, Clayton, Victoria 3169, Australia
| | - Zhiyue Tian
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University , Chengdu 610064, P.R. China
| | - Ying Xue
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University , Chengdu 610064, P.R. China
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11
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Candeias NR, Paterna R, Gois PMP. Homologation Reaction of Ketones with Diazo Compounds. Chem Rev 2016; 116:2937-81. [DOI: 10.1021/acs.chemrev.5b00381] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nuno R. Candeias
- Department
of Chemistry and Bioengineering, Tampere University of Technology, Korkeakoulunkatu 8, Tampere, FI-33101 Finland
| | - Roberta Paterna
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Pedro M. P. Gois
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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12
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Chen M, Hartwig JF. Iridium-Catalyzed Enantioselective Allylic Substitution of Enol Silanes from Vinylogous Esters and Amides. J Am Chem Soc 2015; 137:13972-9. [PMID: 26441002 PMCID: PMC5342901 DOI: 10.1021/jacs.5b09980] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enol silanes of vinylogous esters and amides are classic dienes for Diels-Alder reactions. Here, we report their reactivity as nucleophiles in Ir-catalyzed, enantioselective allylic substitution reactions. A variety of allylic carbonates react with these nucleophiles to give allylated products in good yields with high enantioselectivities and excellent branched-to-linear ratios. These reactions occur with KF or alkoxide as the additive, but mechanistic studies suggest that these additives do not activate the enol silanes. Instead, they serve as bases to promote the cyclometalation to generate the active Ir catalyst. The carbonate anion, which was generated from the oxidative addition of the allylic carbonate, likely activates the enol silanes to trigger their activity as nucleophiles for reactions with the allyliridium electrophile. The synthetic utility of this method was illustrated by the synthesis of the anti-muscarinic drug, fesoterodine.
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Affiliation(s)
- Ming Chen
- Department of Chemistry, University of California , Berkeley, California 94720, United States
| | - John F Hartwig
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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13
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Pagar VV, Liu RS. Gold-Catalyzed Cycloaddition Reactions of Ethyl Diazoacetate, Nitrosoarenes, and Vinyldiazo Carbonyl Compounds: Synthesis of Isoxazolidine and Benzo[b]azepine Derivatives. Angew Chem Int Ed Engl 2015; 54:4923-6. [DOI: 10.1002/anie.201500340] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Indexed: 01/02/2023]
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14
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Pagar VV, Liu RS. Gold-Catalyzed Cycloaddition Reactions of Ethyl Diazoacetate, Nitrosoarenes, and Vinyldiazo Carbonyl Compounds: Synthesis of Isoxazolidine and Benzo[b]azepine Derivatives. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500340] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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He Q, So CM, Bian Z, Hayashi T, Wang J. Rhodium/Chiral Diene-Catalyzed Asymmetric 1,4-Addition of Arylboronic Acids to Chromones: A Highly Enantioselective Pathway for Accessing Chiral Flavanones. Chem Asian J 2015; 10:540-3. [DOI: 10.1002/asia.201403290] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 12/07/2014] [Indexed: 12/31/2022]
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16
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Pagar VV, Liu RS. Gold-catalyzed α-furanylations of quinoline N-oxides with alkenyldiazo carbonyl species. Org Biomol Chem 2015; 13:6166-9. [DOI: 10.1039/c5ob00696a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold-catalyzed α-furanylations of 8-alkylquinoline N-oxides have been achieved using various alkenyldiazo carbonyl species as nucleophiles.
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Affiliation(s)
| | - Rai-Shung Liu
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
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17
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Ligand-selective activation of heterologously-expressed mammalian olfactory receptor. Cell Calcium 2014; 56:245-56. [PMID: 25149566 DOI: 10.1016/j.ceca.2014.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 07/24/2014] [Accepted: 07/27/2014] [Indexed: 11/23/2022]
Abstract
Mammalian olfactory receptors (ORs) appear to have the capacity to couple to multiple G protein-coupled signaling pathways in a ligand-dependent selective manner. To better understand the mechanisms and molecular range of such ligand selectivity, we expressed the mouse eugenol OR (mOR-EG) in HEK293T cells together with Gα15 to monitor activation of the phospholipase-C (PLC) signaling pathway and/or Gαolf to monitor activation of the adenylate cyclase (AC) signaling pathway, resulting in intracellular Ca(2+) release and/or Ca(2+) influx through a cyclic nucleotide-gated channel, respectively. PLC-dependent responses differed dynamically from AC-dependent responses, allowing them to be distinguished when Gα15 and Gαolf were co-expressed. The dynamic difference in readout was independent of the receptor, the heterologous expression system, and the ligand concentration. Of 17 reported mOR-EG ligands tested, including eugenol, its analogs, and structurally dissimilar compounds (mousse cristal, nootkatone, orivone), some equally activated both signaling pathways, some differentially activated both signaling pathways, and some had no noticeable effect even at 1-5mM. Our findings argue that mOR-EG, when heterologously expressed, can couple to two different signaling pathways in a ligand selective manner. The challenge now is to determine the potential of mOR-EG, and perhaps other ORs, to activate multiple signaling pathways in a ligand selective manner in native ORNs.
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18
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Blencowe PS, Barrett AGM. Biomimetic Synthesis of Functionalized γ-Resorcylates from Dioxinone Derivatives. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402473] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Pagar VV, Jadhav AM, Liu RS. Gold-Catalyzed Reactions between Alkenyldiazo Carbonyl Species and Acetals. J Org Chem 2013; 78:5711-6. [DOI: 10.1021/jo400419d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Appaso M. Jadhav
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC
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20
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Jadhav AM, Pagar VV, Liu RS. Development of a Povarov Reaction/Carbene Generation Sequence for Alkenyldiazocarbonyl Compounds. Angew Chem Int Ed Engl 2012; 51:11809-13. [DOI: 10.1002/anie.201205692] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 09/05/2012] [Indexed: 11/08/2022]
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21
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Jadhav AM, Pagar VV, Liu RS. Development of a Povarov Reaction/Carbene Generation Sequence for Alkenyldiazocarbonyl Compounds. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205692] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Liu Y, Doyle MP. Michael addition/pericyclization/rearrangement--a multicomponent strategy for the synthesis of substituted resorcinols. Org Biomol Chem 2012; 10:6388-94. [PMID: 22733346 DOI: 10.1039/c2ob25776a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of methyl 3,7-dioxo-2-diazo-4-octenoate from the zinc triflate catalyzed Mukaiyama-Michael reaction of methyl 3-tert-butylsilyloxy-2-diazobutenoate and 4-methoxy-3-buten-2-one with Michael acceptors (methyl vinyl ketone, N-phenylmaleimide, β-nitrovinylarenes) in the presence of a catalytic amount of base provides convenient access to highly substituted resorcinol derivatives. This transformation is achieved in an efficient one-pot multi-component transformation by the sequential addition of the reagents.
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Affiliation(s)
- Yu Liu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
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23
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Sugimoto K, Hayashi R, Nemoto H, Toyooka N, Matsuya Y. Efficient Approach to 1,2-Diazepines via Formal Diazomethylene Insertion into the C–C bond of Cyclobutenones. Org Lett 2012; 14:3510-3. [DOI: 10.1021/ol301474g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kenji Sugimoto
- Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan, Lead Chemical Co. Ltd, 77-3 Himata, Toyama 930-0192, Japan, and Graduate School of Science and Technology for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Rie Hayashi
- Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan, Lead Chemical Co. Ltd, 77-3 Himata, Toyama 930-0192, Japan, and Graduate School of Science and Technology for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Hideo Nemoto
- Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan, Lead Chemical Co. Ltd, 77-3 Himata, Toyama 930-0192, Japan, and Graduate School of Science and Technology for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Naoki Toyooka
- Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan, Lead Chemical Co. Ltd, 77-3 Himata, Toyama 930-0192, Japan, and Graduate School of Science and Technology for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Yuji Matsuya
- Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan, Lead Chemical Co. Ltd, 77-3 Himata, Toyama 930-0192, Japan, and Graduate School of Science and Technology for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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24
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Xu X, Shabashov D, Zavalij PY, Doyle MP. Substrate-dependent divergent outcomes from catalytic reactions of silyl-protected enol diazoacetates with nitrile oxides: azabicyclo[3.1.0]hexanes or 5-arylaminofuran-2(3H)-ones. J Org Chem 2012; 77:5313-7. [PMID: 22621315 PMCID: PMC3377374 DOI: 10.1021/jo3006733] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dirhodium(II)-catalyzed reactions of silyl-protected enol diazoacetates with nitrile oxides exhibit high nitrile oxide substituent dependence in the production rearrangement products via dipolar cycloaddition and either the Neber rearrangement or the Lossen rearrangement.
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Affiliation(s)
- Xinfang Xu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Dmitry Shabashov
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Michael P. Doyle
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
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25
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Xu X, Shabashov D, Zavalij PY, Doyle MP. Unexpected catalytic reactions of silyl-protected enol diazoacetates with nitrile oxides that form 5-arylaminofuran-2(3H)-one-4-carboxylates. Org Lett 2012; 14:800-3. [PMID: 22272728 PMCID: PMC3273040 DOI: 10.1021/ol203331r] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Silyl-protected enol diazoacetates undergo dirhodium(II)-catalyzed reactions with nitrile oxides to form acid-labile ketenimines via dipolar cycloaddition of nitrile oxides to a donor/acceptor cyclopropene and Lossen rearrangement of the dipolar adduct; acid catalysis converts the ketenimine to the furan product.
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Affiliation(s)
- Xinfang Xu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Dmitry Shabashov
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Michael P. Doyle
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
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26
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Abstract
A triple cascade process was developed for the rapid synthesis of polycyclic benzo-fused dihydrofurans. The first step is a rhodium-catalyzed cyclopropanation of α-aryldiazoketones with alkenes. This is followed by a silver-catalyzed ring expansion to dihydrofurans, which then undergo a gold-catalyzed cyclization to form benzo-fused dihydrofurans.
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27
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Xu X, Hu WH, Doyle MP. Highly enantioselective catalytic synthesis of functionalized chiral diazoacetoacetates. Angew Chem Int Ed Engl 2011; 50:6392-5. [PMID: 21630405 PMCID: PMC3367309 DOI: 10.1002/anie.201102405] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Xinfang Xu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Wen-Hao Hu
- Institute of Drug Discovery and Development, East China Normal University, 3663 Zhongshan Bei Road, Shanghai 200062, China
| | - Michael P. Doyle
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, Fax: (+11) 301-314-2779
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28
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Xu X, Hu WH, Doyle MP. Highly Enantioselective Catalytic Synthesis of Functionalized Chiral Diazoacetoacetates. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102405] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Nishimura T, Kasai A, Nagaosa M, Hayashi T. Rhodium-catalyzed asymmetric addition of arylboroxines to β-alkoxyacrylate esters. Chem Commun (Camb) 2011; 47:10488-90. [DOI: 10.1039/c1cc14150c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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