1
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Perkins J, Hayashi T, Peakall R, Flematti GR, Bohman B. The volatile chemistry of orchid pollination. Nat Prod Rep 2023; 40:819-839. [PMID: 36691832 DOI: 10.1039/d2np00060a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Covering: up to September 2022Orchids are renowned not only for their diversity of floral forms, but also for their many and often highly specialised pollination strategies. Volatile semiochemicals play a crucial role in the attraction of a wide variety of insect pollinators of orchids. The compounds produced by orchid flowers are as diverse as the pollinators they attract, and here we summarise some of the chemical diversity found across orchid taxa and pollination strategies. We focus on compounds that have been experimentally demonstrated to underpin pollinator attraction. We also highlight the structural elucidation and synthesis of a select subset of important orchid pollinator attractants, and discuss the ecological significance of the discoveries, the gaps in our current knowledge of orchid pollination chemistry, and some opportunities for future research in this field.
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Affiliation(s)
- James Perkins
- Research School of Biology, The Australian National University, Australia
| | - Tobias Hayashi
- Research School of Biology, The Australian National University, Australia
| | - Rod Peakall
- Research School of Biology, The Australian National University, Australia.,School of Molecular Sciences, The University of Western Australia, Australia
| | - Gavin R Flematti
- School of Molecular Sciences, The University of Western Australia, Australia
| | - Björn Bohman
- Research School of Biology, The Australian National University, Australia.,School of Molecular Sciences, The University of Western Australia, Australia.,Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sweden.
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2
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Tsurugi H, Matsuno M, Kawakami T, Mashima K. Pyrazine Alkylation with Aldehydes and Haloalkanes Using N,N’‐Bis(trimethylsilyl)‐1,4‐dihydropyrazine Derivatives. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hayato Tsurugi
- Osaka University Department of Chemistry 1-3, Machikaneyama-cho 560-8531 Toyonaka JAPAN
| | | | | | - Kazushi Mashima
- Osaka University: Osaka Daigaku Pharmaceutical Sciences JAPAN
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3
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Drakolide Structure-activity Relationships for Sexual Attraction of Zeleboria Wasp Pollinator. J Chem Ecol 2022; 48:323-336. [DOI: 10.1007/s10886-021-01324-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/06/2021] [Accepted: 10/13/2021] [Indexed: 11/26/2022]
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4
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Ma B, Sun R, Yang J. Cobalt-catalyzed direct α-hydroxymethylation of amides with methanol as a C1 source. Chem Commun (Camb) 2022; 58:1382-1385. [PMID: 34989725 DOI: 10.1039/d1cc06501g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein, we report a cobalt-catalyzed α-hydroxymethylation of amides with methanol under mild conditions. Using CoCl2·6H2O as an inexpensive and efficient catalyst, some important bioactive β-hydroxyamides were obtained in moderate to excellent yields. The developed method features a wide substrate scope and good functional group tolerance. In addition, anticholinergic tropicamide was easily synthesized in this way.
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Affiliation(s)
- Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.
| | - Rongxia Sun
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.
| | - Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.
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5
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Chen X, Luo X, Wang P. Electrochemical-induced Radical Allylation via the Fragmentation of Alkyl 1,4-Dihydropyridines. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153646] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Birk F, Brescia FF, Fraatz MA, Pelzer R, Zorn H. Aroma active alkylated pyrazines are produced by
Basfia succiniciproducens
as by‐products of succinic acid production. FLAVOUR FRAG J 2021. [DOI: 10.1002/ffj.3674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Florian Birk
- Institute of Food Chemistry and Food Biotechnology Justus Liebig University Giessen Giessen Germany
| | - Fabio F. Brescia
- Institute of Food Chemistry and Food Biotechnology Justus Liebig University Giessen Giessen Germany
| | - Marco A. Fraatz
- Institute of Food Chemistry and Food Biotechnology Justus Liebig University Giessen Giessen Germany
| | - Ralf Pelzer
- New Business Development Aroma Ingredients BASF SE Lampertheim Germany
| | - Holger Zorn
- Institute of Food Chemistry and Food Biotechnology Justus Liebig University Giessen Giessen Germany
- Fraunhofer Institute for Molecular Biology and Applied Ecology Giessen Germany
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7
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Abstract
Minisci-type reactions have been widely known as reactions that involve the addition
of carbon-centered radicals to basic heteroarenes followed by formal hydrogen atom loss.
While the originally developed protocols for radical generation remain in active use today, in
recent years, the new array of radical generation strategies have allowed the use of a wider
variety of radical precursors that often operate under milder and more benign conditions. New
transformations based on free radical reactivity are now available to a synthetic chemist, to
utilize a Minisci-type reaction. Radical-generation methods based on photoredox catalysis
and electrochemistry, which utilize thermal cleavage or the in situ generation of reactive radical
precursors, have become popular approaches. Our review will cover the remarkable literature
that has been reported on this topic in recent 5 years, from 2015-01 to 2020-01, in an
attempt to provide guidance to the synthetic chemist on both the challenges that need to be overcome and the applications
in organic synthesis.
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Affiliation(s)
- Wengui Wang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Shoufeng Wang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
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8
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Luo W, Yang Y, Liu B, Yin B. Iron-Catalyzed Oxidative Decarbonylative α-Alkylation of Acyl-Substituted Furans with Aliphatic Aldehydes as the Alkylating Agents. J Org Chem 2020; 85:9396-9404. [PMID: 32524818 DOI: 10.1021/acs.joc.0c01002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A protocol for FeCl2-catalyzed oxidative decarbonylative α-alkylation of acyl furans using alkyl aldehydes as the alkylating agents has been developed. This protocol affords α-alkyl-α-acylfurans in moderate to good yields in a practical and sustainable fashion. Mechanistic studies suggest that the reaction proceeds via generation of an alkyl radical from the alkyl aldehyde, addition of the radical to the furan ring, and subsequent rearomatization.
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Affiliation(s)
- Wenkun Luo
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Yongjie Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Bo Liu
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510006, P. R. China
| | - Biaolin Yin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
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9
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Liu J, Yu D, Yang Y, You H, Sun M, Wang Y, Shen X, Liu ZQ. Free-Radical-Promoted Dehydrogenative Coupling of Polyfluorinated Alcohol with Quinone, Chromone, and Coumarin. Org Lett 2020; 22:4844-4847. [PMID: 32500708 DOI: 10.1021/acs.orglett.0c01671] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A free-radical-mediated dehydrogenative cross-coupling reaction of polyfluorinated alcohol with quinone, coumarin, and chromone was developed. It provides a sustainable and practical strategy for installation of fluorine atom into organic molecules by using polyfluorinated alcohols.
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Affiliation(s)
- Jingping Liu
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Dan Yu
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yong Yang
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Huichao You
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Minzhi Sun
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yaxin Wang
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xu Shen
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Zhong-Quan Liu
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
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10
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Bohman B, Tan MMY, Phillips RD, Scaffidi A, Sobolev AN, Moggach SA, Flematti GR, Peakall R. A Specific Blend of Drakolide and Hydroxymethylpyrazines: An Unusual Pollinator Sexual Attractant Used by the Endangered Orchid
Drakaea micrantha. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Björn Bohman
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
- Research School of Biology Australian National University Canberra ACT 2600 Australia
| | - Monica M. Y. Tan
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Ryan D. Phillips
- Research School of Biology Australian National University Canberra ACT 2600 Australia
- Department of Biodiversity Conservation and Attractions Kings Park Science, 1 Kattidj Close West Perth WA 6005 Australia
- Department of Ecology Environment and Evolution La Trobe University Melbourne Melbourne Victoria 3086 Australia
| | - Adrian Scaffidi
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Alexandre N. Sobolev
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Stephen A. Moggach
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Gavin R. Flematti
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Rod Peakall
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
- Research School of Biology Australian National University Canberra ACT 2600 Australia
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11
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Alhameedi K, Chandler GS, Jayatilaka D. Roby-Gould bond indices as a tool for understanding chemical bonding from a mathematical and quantum mechanical perspective. RESULTS IN CHEMISTRY 2020. [DOI: 10.1016/j.rechem.2020.100053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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12
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Bohman B, Tan MMY, Phillips RD, Scaffidi A, Sobolev AN, Moggach SA, Flematti GR, Peakall R. A Specific Blend of Drakolide and Hydroxymethylpyrazines: An Unusual Pollinator Sexual Attractant Used by the Endangered Orchid
Drakaea micrantha. Angew Chem Int Ed Engl 2019; 59:1124-1128. [DOI: 10.1002/anie.201911636] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/31/2019] [Indexed: 01/22/2023]
Affiliation(s)
- Björn Bohman
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
- Research School of Biology Australian National University Canberra ACT 2600 Australia
| | - Monica M. Y. Tan
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Ryan D. Phillips
- Research School of Biology Australian National University Canberra ACT 2600 Australia
- Department of Biodiversity Conservation and Attractions Kings Park Science, 1 Kattidj Close West Perth WA 6005 Australia
- Department of Ecology Environment and Evolution La Trobe University Melbourne Melbourne Victoria 3086 Australia
| | - Adrian Scaffidi
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Alexandre N. Sobolev
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Stephen A. Moggach
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Gavin R. Flematti
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
| | - Rod Peakall
- School of Molecular Sciences The University of Western Australia Crawley WA 6009 Australia
- Research School of Biology Australian National University Canberra ACT 2600 Australia
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13
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Dong J, Wang Z, Wang X, Song H, Liu Y, Wang Q. Ketones and aldehydes as alkyl radical equivalents for C─H functionalization of heteroarenes. SCIENCE ADVANCES 2019; 5:eaax9955. [PMID: 31646180 PMCID: PMC6788867 DOI: 10.1126/sciadv.aax9955] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 09/18/2019] [Indexed: 05/24/2023]
Abstract
The polar nature of the C═O bond commonly allows it to undergo direct attack by nucleophiles at the electrophilic carbon atom in which ketones and aldehydes act as alkyl carbocation equivalents. In contrast, transformations in which ketones and aldehydes act as alkyl radical equivalents (generated in carbonyl carbon) are unknown. Here, we describe a new catalytic activation mode that combines proton-coupled electron transfer (PCET) with spin-center shift (SCS) and enables C─H alkylation of heteroarenes using ketones and aldehydes as alkyl radical equivalents. This transformation proceeded via reductive PCET activation of the ketones and aldehydes to form α-oxy radicals, addition of the radicals to the N-heteroarenes to form C─C bonds, and SCS to cleave the C─O bonds of the resulting alcohols. This mild protocol represents a general use of abundant, commercially available, ketones and aldehydes as latent alkyl radical equivalents.
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Affiliation(s)
- Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Zhen Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xiaochen Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, People’s Republic of China
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14
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Ghosh P, Kwon NY, Han S, Kim S, Han SH, Mishra NK, Jung YH, Chung SJ, Kim IS. Site-Selective C-H Alkylation of Diazine N-Oxides Enabled by Phosphonium Ylides. Org Lett 2019; 21:6488-6493. [PMID: 31373494 DOI: 10.1021/acs.orglett.9b02365] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The synthesis of alkylated diazine derivatives is important for their practical utilization as pharmaceuticals and for other purposes. Herein, we describe the metal-free site-selective C-H alkylation of diazine N-oxides using phosphonium ylides that affords a variety of alkylated diazine derivatives with broad functional group tolerance. The utility of this method is showcased by the late-stage functionalization of a commercially available drug such as varenicline. Notably, the sequential C-H alkylation of pyrazine N-oxides for the total synthesis of a pyrazine-containing natural product, paenibacillin A, highlights the importance of this method.
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Affiliation(s)
- Prithwish Ghosh
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Na Yeon Kwon
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Sangil Han
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Saegun Kim
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Sang Hoon Han
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Neeraj Kumar Mishra
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Young Hoon Jung
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Sang J Chung
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - In Su Kim
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
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15
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Zhao T, Ni D, Hu G, Wang L, Chen S, Xu Y. 6-(2-Formyl-5-methyl-1 H-pyrrol-1-yl)hexanoic Acid as a Novel Retronasal Burnt Aroma Compound in Soy Sauce Aroma-Type Chinese Baijiu. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:7916-7925. [PMID: 31180675 DOI: 10.1021/acs.jafc.9b02095] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two-step high-performance liquid chromatography (HPLC) separation in combination with taste dilution analysis was used to screen the retronasal burnt aroma compounds in soy sauce aroma-type Chinese Baijiu (Chinese traditional liquor). A major retronasal burnt aroma region was purified by Sephadex LH-20 column chromatography and HPLC separation from the soy sauce aroma-type Baijiu sample. A novel retronasal burnt aroma compound was identified as 6-(2-formyl-5-methyl-1H-pyrrol-1-yl)hexanoic acid (1) by means of high-resolution mass spectrometry and 1D/2D nuclear magnetic resonance. The retronasal burnt aroma threshold of compound 1 was determined to be 209.5 μg/L in 53% ethanol aqueous solution. Quantitative analysis showed that the concentration of compound 1 ranged from below the limit of quantitation (3.8 μg/L) to 224.2 μg/L in the Baijiu samples. Moreover, the sensory evaluation also revealed that compound 1 may contribute to the retronasal burnt aroma of the Baijiu at its subthreshold concentration by the additive effect with the recently reported retronasal burnt aroma compound 2-hydroxymethyl-3,6-diethyl-5-methylpyrazine.
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Affiliation(s)
- Tengfei Zhao
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University Wuxi , Jiangsu 214122 , China
| | - Derang Ni
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University Wuxi , Jiangsu 214122 , China
- Technique Center of Kweichow Moutai Company Limited , Renhuai , Guizhou 564500 , China
| | - Guangyuan Hu
- Technique Center of Kweichow Moutai Company Limited , Renhuai , Guizhou 564500 , China
| | - Li Wang
- Technique Center of Kweichow Moutai Company Limited , Renhuai , Guizhou 564500 , China
| | - Shuang Chen
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University Wuxi , Jiangsu 214122 , China
| | - Yan Xu
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University Wuxi , Jiangsu 214122 , China
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16
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Bohman B, Weinstein AM, Phillips RD, Peakall R, Flematti GR. 2-(Tetrahydrofuran-2-yl)acetic Acid and Ester Derivatives as Long-Range Pollinator Attractants in the Sexually Deceptive Orchid Cryptostylis ovata. JOURNAL OF NATURAL PRODUCTS 2019; 82:1107-1113. [PMID: 30920220 DOI: 10.1021/acs.jnatprod.8b00772] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sexually deceptive orchids achieve pollination by luring male insects to flowers through chemical and sometimes visual mimicry of females. An extreme example of this deception occurs in Cryptostylis, one of only two genera where sexual deception is known to induce pollinator ejaculation. In the present study, bioassay-guided fractionations of Cryptostylis solvent extracts in combination with field bioassays were implemented to isolate and identify floral volatiles attractive to the pollinator Lissopimpla excelsa. ( S)-2-(Tetrahydrofuran-2-yl)acetic acid [( S)-1] and the ester derivatives methyl ( S)-2-(tetrahydrofuran-2-yl)acetate [( S)-2] and ethyl ( S)-2-(tetrahydrofuran-2-yl)acetate [( S)-3], all previously unknown semiochemicals, were confirmed to attract L. excelsa males in field bioassays. Chiral-phase GC and HPLC showed that the natural product 1 comprised a single enantiomer, its S-configuration being confirmed by synthesis of the two enantiomers from known enantiomers of tetrahydrofuran-2-carboxylic acid.
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Affiliation(s)
- Björn Bohman
- School of Molecular Sciences , The University of Western Australia , Crawley , WA 6009 , Australia
- Ecology and Evolution, Research School of Biology , The Australian National University , Canberra , ACT 2600 , Australia
| | - Alyssa M Weinstein
- School of Molecular Sciences , The University of Western Australia , Crawley , WA 6009 , Australia
- Ecology and Evolution, Research School of Biology , The Australian National University , Canberra , ACT 2600 , Australia
| | - Ryan D Phillips
- Ecology and Evolution, Research School of Biology , The Australian National University , Canberra , ACT 2600 , Australia
- Department of Ecology, Environment and Evolution , La Trobe University , Melbourne , Victoria 3086 , Australia
- Department of Biodiversity Conservation and Attractions , Kings Park Science , 1 Kattidj Close , West Perth , WA , Australia
| | - Rod Peakall
- School of Molecular Sciences , The University of Western Australia , Crawley , WA 6009 , Australia
- Ecology and Evolution, Research School of Biology , The Australian National University , Canberra , ACT 2600 , Australia
| | - Gavin R Flematti
- School of Molecular Sciences , The University of Western Australia , Crawley , WA 6009 , Australia
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17
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Liu S, Fan F, Wang N, Yuan D, Wang Y, Luo Z, Liu Z. Four Pathways in Radical Alkylation of Isocyanide with Simple Alcohol. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900221] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuai Liu
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
- College of Chemical EngineeringAnhui University of Science and Technology, Huainan Anhui 232001 People's Republic of China
| | - Fenghua Fan
- State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
| | - Nengyong Wang
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Dandan Yuan
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Yaxin Wang
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Zaigang Luo
- College of Chemical EngineeringAnhui University of Science and Technology, Huainan Anhui 232001 People's Republic of China
| | - Zhong‐Quan Liu
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
- State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
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18
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Visible light-induced direct α C-H functionalization of alcohols. Nat Commun 2019; 10:467. [PMID: 30692540 PMCID: PMC6349847 DOI: 10.1038/s41467-019-08413-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/29/2018] [Indexed: 12/21/2022] Open
Abstract
Considering the synthetic value of introducing active alcoholic hydroxyl group, developing C-H functionalization of alcohols is of significance. Herein, we present a photochemical method that under visible light irradiation, selectfluor can effectively promote the oxidative cross-coupling between alcohols and heteroarenes without the external photocatalysis, achieving the selective α sp3 C-H arylation of alcohol, even in the presence of ether. The N-F activation of selectfluor under blue LEDs irradiation is evidenced by electron paramagnetic resonance (EPR) study, which is the key process for the oxidative activation of α sp3 C-H alcohols. The observed reactivity may have significant implications for chemical transformations.
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19
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Wang S, Xing S, Zhang Y, Fan Y, Zhao H, Wang J, Zhang S, Wang W. The Ag-promoted α-C–H arylation of alcohols. RSC Adv 2019; 9:41847-41850. [PMID: 35541603 PMCID: PMC9076519 DOI: 10.1039/c9ra09954a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 12/02/2019] [Indexed: 01/11/2023] Open
Abstract
We herein report the functionalization of α-C–H in alcohols through cross-dehydrogenative coupling reactions. Selectfluor was used as a mild oxidant. In situ-generated HF participated in the reaction and no external strong acid was necessary. A variety of heteroaryl-substituted alcohols were achieved with good yields and with good functional group tolerance. We herein report the functionalization of α-C–H in alcohols through cross-dehydrogenative coupling reactions.![]()
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Affiliation(s)
- Shoufeng Wang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
| | - Shuya Xing
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
| | - Yingying Zhang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
| | - Yafei Fan
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
| | - Huaiqing Zhao
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
| | - Jianfeng Wang
- Department of Respiratory Diseases
- The Affiliated Hospital of Hangzhou Normal University
- Hangzhou
- China
| | - Shuxiang Zhang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
| | - Wengui Wang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- China
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
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20
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Zhao T, Chen S, Li H, Xu Y. Identification of 2-Hydroxymethyl-3,6-diethyl-5-methylpyrazine as a Key Retronasal Burnt Flavor Compound in Soy Sauce Aroma Type Baijiu Using Sensory-Guided Isolation Assisted by Multivariate Data Analysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:10496-10505. [PMID: 30221519 DOI: 10.1021/acs.jafc.8b03980] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The burnt flavor (overcooked rice flavor) is often retronasally perceived during the soy sauce aroma type Chinese Baijiu (Chinese distilled spirit) tasting and regarded as an important quality marker of the Baijiu. The sensory-guided isolation approach assisted by multivariate data analysis was applied to identify the compounds responsible for the retronasal burnt flavor in the Baijiu. Using two-dimensional offline high performance liquid chromatography separation and taste dilution analysis, a subfraction with the highest burnt flavor intensity was isolated from the Baijiu sample. In the subfraction, six potential flavor compounds were detected by ultra performance liquid chromatography-mass spectrometry. The most probable burnt flavor compound was screened by projection to latent structure regression analysis of the correlation between the potential compounds and their impact on burnt flavor. The target compound was identified as 2-hydroxymethyl-3,6-diethyl-5-methylpyrazine by means of high-resolution mass spectrometry and chemical synthesis. Sensory evaluation revealed a relatively low burnt flavor threshold of 2.89 μmol/L in 53% ethanol aqueous solution. On the basis of the dose-overthreshold factor and addition experiment, this compound was confirmed as the key contributor to the burnt flavor of soy sauce aroma type Baijiu.
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Affiliation(s)
- Tengfei Zhao
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , China
| | - Shuang Chen
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , China
| | - Huazhong Li
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , China
| | - Yan Xu
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science & Technology & School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , China
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21
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22
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Yang J, Xie D, Zhou H, Chen S, Duan J, Huo C, Li Z. Visible-Light-Mediated Rose Bengal-Catalyzed α-Hydroxymethylation of Ketones with Methanol. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800467] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jingya Yang
- College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Dongtai Xie
- College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Hongyan Zhou
- College of Science; Gansu Agricultural University; Lanzhou 730070 People's Republic of China
| | - Shuwen Chen
- College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Jiaokui Duan
- College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Congde Huo
- College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
| | - Zheng Li
- College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 People's Republic of China
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23
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Williams CL, Caraballo-Rodríguez AM, Allaband C, Zarrinpar A, Knight R, Gauglitz JM. Wildlife-microbiome interactions and disease: exploring opportunities for disease mitigation across ecological scales. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.ddmod.2019.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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24
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Chen R, Yu JT, Cheng J. Metal-free oxidative decarbonylative alkylation of chromones using aliphatic aldehydes. Org Biomol Chem 2018; 16:3568-3571. [DOI: 10.1039/c8ob00720a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A decarbonylative alkylation of chromones via radical conjugate addition under metal-free conditions was developed using aliphatic aldehydes as alkylating reagents.
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Affiliation(s)
- Rongzhen Chen
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jiang Cheng
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
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25
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Chen R, Yu JT, Cheng J. Site-specific hydroxyalkylation of chromones via alcohol mediated Minisci-type radical conjugate addition. Org Biomol Chem 2018; 16:1823-1827. [DOI: 10.1039/c8ob00392k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The metal-free C2-functionalization of chromones with alcohols and ethers via radical sp3 C–H activation was developed.
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Affiliation(s)
- Rongzhen Chen
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
- Changzhou University
- Changzhou 213164
| | - Jin-Tao Yu
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
- Changzhou University
- Changzhou 213164
| | - Jiang Cheng
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
- Changzhou University
- Changzhou 213164
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26
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Zhang L, Liu ZQ. Molecular Oxygen-Mediated Minisci-Type Radical Alkylation of Heteroarenes with Boronic Acids. Org Lett 2017; 19:6594-6597. [DOI: 10.1021/acs.orglett.7b03297] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lizhi Zhang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Zhong-Quan Liu
- State
Key Laboratory Cultivation Base for TCM Quality and Efficacy, College
of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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27
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Liang B, Wang Q, Liu ZQ. A Fe(III)/NaBH4-Promoted Free-Radical Hydroheteroarylation of Alkenes. Org Lett 2017; 19:6463-6465. [DOI: 10.1021/acs.orglett.7b03313] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Bingyu Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Qinglong Wang
- Henan University of Animal Husbandry and Economy, Zhengzhou 450011, China
| | - Zhong-Quan Liu
- State
Key Laboratory Cultivation Base for TCM Quality and Efficacy, College
of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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28
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Gutiérrez-Bonet Á, Remeur C, Matsui JK, Molander GA. Late-Stage C-H Alkylation of Heterocycles and 1,4-Quinones via Oxidative Homolysis of 1,4-Dihydropyridines. J Am Chem Soc 2017; 139:12251-12258. [PMID: 28832137 PMCID: PMC5599171 DOI: 10.1021/jacs.7b05899] [Citation(s) in RCA: 196] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Under oxidative conditions, 1,4-dihydropyridines (DHPs) undergo a homolytic cleavage, forming exclusively a Csp3-centered radical that can engage in the C-H alkylation of heterocyclic bases and 1,4-quinones. DHPs are readily prepared from aldehydes, and considering that aldehydes normally require harsh reaction conditions to take part in such transformations, with mixtures of alkylated and acylated products often being obtained, this net decarbonylative alkylation approach becomes particularly useful. The present method takes place under mild reaction conditions and requires only persulfate as a stoichiometric oxidant, making the procedure suitable for the late-stage C-H alkylation of complex molecules. Notably, structurally complex pharmaceutical agents could be functionalized or prepared with this protocol, such as the antimalarial Atovaquone and antitheilerial Parvaquone, thus evidencing its applicability. Mechanistic studies revealed a likely radical chain process via the formation of a dearomatized intermediate, providing a deeper understanding of the factors governing the reactivity of these radical forebears.
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Affiliation(s)
| | | | - Jennifer K. Matsui
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A. Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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29
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Xu Z, Hang Z, Chai L, Liu ZQ. A Free-Radical-Promoted Site-Specific Cross-Dehydrogenative-Coupling of N-Heterocycles with Fluorinated Alcohols. Org Lett 2016; 18:4662-5. [DOI: 10.1021/acs.orglett.6b02274] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhengbao Xu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhaojia Hang
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Li Chai
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhong-Quan Liu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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30
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Xu Z, Hang Z, Liu ZQ. Free-Radical Triggered Ordered Domino Reaction: An Approach to C–C Bond Formation via Selective Functionalization of α-Hydroxyl-(sp3)C–H in Fluorinated Alcohols. Org Lett 2016; 18:4470-3. [DOI: 10.1021/acs.orglett.6b01946] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhengbao Xu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhaojia Hang
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhong-Quan Liu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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31
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Biswas P, Paul S, Guin J. Aerobic Radical-Cascade Alkylation/Cyclization of α,β-Unsaturated Amides: an Efficient Approach to Quaternary Oxindoles. Angew Chem Int Ed Engl 2016; 55:7756-60. [DOI: 10.1002/anie.201603809] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Promita Biswas
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata- 700032 India
| | - Subhasis Paul
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata- 700032 India
| | - Joyram Guin
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata- 700032 India
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32
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Biswas P, Paul S, Guin J. Aerobic Radical-Cascade Alkylation/Cyclization of α,β-Unsaturated Amides: an Efficient Approach to Quaternary Oxindoles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603809] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Promita Biswas
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata- 700032 India
| | - Subhasis Paul
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata- 700032 India
| | - Joyram Guin
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata- 700032 India
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33
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Bohman B, Karton A, Dixon RCM, Barrow RA, Peakall R. Parapheromones for Thynnine Wasps. J Chem Ecol 2015; 42:17-23. [DOI: 10.1007/s10886-015-0660-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 11/17/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
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34
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Paul S, Guin J. Dioxygen-Mediated Decarbonylative CH Alkylation of Heteroaromatic Bases with Aldehydes. Chemistry 2015; 21:17618-22. [DOI: 10.1002/chem.201503809] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Indexed: 11/11/2022]
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35
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Bohman B, Flematti GR, Barrow RA. Identification of hydroxymethylpyrazines using mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:987-993. [PMID: 28338274 DOI: 10.1002/jms.3612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 04/29/2015] [Accepted: 05/03/2015] [Indexed: 06/06/2023]
Abstract
Pyrazines are well-known natural products that are present in bacterial odours and food flavouring agents and are used as insect pheromones. Recently, a number of hydroxymethylpyrazines have been identified as thynnine wasp pheromones and orchid semiochemicals that are essential for pollination in sexually deceptive plants. These compounds are present in low amounts in complex blends, making GC-MS (including high-resolution techniques) the method of choice for their structure elucidation. We report the EI mass spectra for 14 representative compounds and have found that based on characteristic fragmentations, it is possible to distinguish between different positional isomers of hydroxymethylpyrazines. The presence or absence of either [M - 17]+ , [M - 18]+· or [M - 19]+ fragment species provides characteristic information to allow the distinction between the different isomers. Considering the importance of pyrazines as a group of bioactive natural products, and the recent findings of biological activity for hydroxymethylpyrazines, our results presented here will aid the identification of these compounds in other biological systems. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Björn Bohman
- Research School of Chemistry, The Australian National University, Canberra, 0200, ACT, Australia
- Research School of Biology, The Australian National University, Canberra, 0200, ACT, Australia
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, 6009, WA, Australia
| | - Gavin R Flematti
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, 6009, WA, Australia
| | - Russell A Barrow
- Research School of Chemistry, The Australian National University, Canberra, 0200, ACT, Australia
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36
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37
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Tang RJ, Kang L, Yang L. Metal-Free Oxidative Decarbonylative Coupling of Aliphatic Aldehydes with Azaarenes: Successful Minisci-Type Alkylation of Various Heterocycles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500268] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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