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Zhu B, An H, Li L, Zhang H, Lv J, Hu W, Xue F, Liu L, He S, Li D. Characterization of Flavor Profiles of Cigar Tobacco Leaves Grown in China via Headspace-Gas Chromatography-Ion Mobility Spectrometry Coupled with Multivariate Analysis and Sensory Evaluation. ACS OMEGA 2024; 9:15996-16005. [PMID: 38617669 PMCID: PMC11007687 DOI: 10.1021/acsomega.3c09499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/05/2024] [Accepted: 03/14/2024] [Indexed: 04/16/2024]
Abstract
Although cigar tobacco leaves (CTLs) have a high economic value, research regarding the flavor characteristics of CTLs is currently limited. A comprehensive study of the flavor characteristics of CTLs from different regions of China was conducted by identifying their volatile-flavor-containing compounds (VFCs) and flavors. The samples were analyzed via gas chromatography-ion mobility spectrometry (GC-IMS) and sensory evaluation. Results revealed considerable differences in the VFC contents of CTLs from different regions of China, suggesting that the VFLs of CTLs could be influenced by geographical origin. Mainly, phenols, pyrazines, and aldehydes were present in the CTLs from Sichuan. High contents of esters and pyrazines were present in the CTLs from Hubei, while esters were the major components of the CTLs from Hainan. Multivariate analysis results showed the effective differentiation of samples from different geographical origins based on the GC-IMS results. Sensory evaluation revealed that the flavors of CTLs from different geographical origins were different. 1,8-Pinene, 3-methyl-3-butene-1-ol, 2,3-dimethyl-5-ethylpyrazine, 4-methyl-3-penten-2-one, and (E)-2-pentenal might serve as geographical marker compounds, indicating the geographical origin of CTLs based on the results of GC-IMS and sensory evaluation. This study may be beneficial for the trade of CTLs and the development of cigar products.
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Affiliation(s)
- Beibei Zhu
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
| | - Hongyue An
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
| | - Li Li
- Technology
Center, China Tobacco Sichuan Industrial
Co., Ltd., No. 80, Fourth
Road, Section 1 of Checheng West, Longquan District, Chengdu 610100, China
| | - Hongfei Zhang
- National
Tobacco Quality Supervision and Test Center, No. 6, Green Bamboo Street, New
and High-Tech Industrial Development District, Zhengzhou 450001, China
| | - Jinxiong Lv
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
| | - Wanrong Hu
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
| | - Fang Xue
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
| | - Lulu Liu
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
| | - Shengbao He
- National
Tobacco Quality Supervision and Test Center, No. 6, Green Bamboo Street, New
and High-Tech Industrial Development District, Zhengzhou 450001, China
| | - Dongliang Li
- Key
Laboratory of Chinese Cigar Fermentation, China Tobacco Technology
Innovation Center for Cigar, China Tobacco
Sichuan Industrial Co., Ltd., No. 80, Fourth Road, Section 1 of Checheng West,
Longquan District, Chengdu 610100, China
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Li H, Dickschat JS. Enzymatic Synthesis of Diterpenoids from iso-GGPP III: A Geranylgeranyl Diphosphate Analog with a Shifted Double Bond. Chemistry 2024; 30:e202303560. [PMID: 37947363 DOI: 10.1002/chem.202303560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/10/2023] [Accepted: 11/10/2023] [Indexed: 11/12/2023]
Abstract
The analog of the diterpene precursor geranylgeranyl diphosphate with a double bond shifted from C14=C15 to C15=C16 (named iso-GGPP III) has been synthesized and enzymatically converted with six bacterial diterpene synthases; this allowed the isolation of nine unnatural diterpenes. For some of the enzyme-substrate combinations, the different reactivity implemented in the substrate analog iso-GGPP III opened reaction pathways that are not observed with natural GGPP, resulting in the formation of diterpenes with novel skeletons. A stereoselective deuteration strategy was used to assign the absolute configurations of the isolated diterpenes.
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Affiliation(s)
- Heng Li
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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Identification of sex-specific compounds in the invasive four-eyed fir bark beetle Polygraphus proximus. CHEMOECOLOGY 2022. [DOI: 10.1007/s00049-022-00377-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractPolygraphus proximus, a four-eyed fir bark beetle, is an invasive bark beetle species which has caused extensive damage to forests of Abies sibirica in southern and western Siberia and to Abies species in the European part of Russia. There is a high risk that the pest insect will spread to areas where it is currently not considered present, such as the European Union. In these areas, it threatens to attack conifer forests of various species which may result in major environmental and economic impact. The aim of this study was to identify pheromone components of P. proximus that can be used as pheromone baits. Males and females of P. proximus were allowed to bore into the bark of stem sections of Abies sibirica at the laboratory, and volatiles were collected with solid-phase microextraction (SPME). Analyses of these extracts with gas chromatography-mass spectrometry (GC–MS) revealed several sex-specific compounds. In total, twelve male-specific compounds and one female-specific compound were identified. The major male-specific compound determined by GC peak area was (Z)‐2‐(3,3‐dimethylcyclohexylidene)‐ethanol [(Z)-DMCHE] and the minor male-specific compounds were 3-methyl-3-buten-1-ol, 3-methyl-2-buten-1-ol, 3-methyl-2-butenal, benzyl alcohol, fragranol, 7-methyl-3-methylene-6-octen-1-ol, (Z)- and (E)-2-(3,3-dimethylcyclohexylidene)-acetaldehyde, geraniol, geranial and papayanol. The only female-specific compound was identified as 1-hexanol. Two of the male-specific compounds, (Z)‐DMCHE and 3-methyl-2-buten-1-ol were shown to attract males and females of P. proximus in field studies. Thus, we now for the first time can present the structures of two male-specific components that are biologically active parts of P. proximus aggregation pheromone. However, some chemical communication overlap between P. proximus and P. subopacus needs to be further investigated as (Z)‐DMCHE also attracted males and females of P. subopacus.
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Identification of male produced compounds in the bark beetle Polygraphus subopacus and establishment of (Z)-2-(3,3-dimethylcyclohexylidene)-ethanol as an aggregation pheromone component. CHEMOECOLOGY 2021. [DOI: 10.1007/s00049-021-00358-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractBark beetles of the genus Polygraphus have recently been involved in large bark beetle outbreaks in central Sweden, together with the European spruce bark beetle Ips typographus. Three species of Polygraphus can be found in this region; Polygraphus poligraphus, Polygraphus punctifrons and Polygraphus subopacus. Efficient pheromone traps would facilitate further investigations of these species and their role in bark beetle outbreaks. Pheromone compounds have previously been identified in P. poligraphus and P. punctifrons, but not in P. subopacus. Thus, we allowed males and females of P. subopacus to bore in the bark of stem sections of Norway spruce (Picea abies) in the laboratory. Volatile organic compounds from boring insects were sampled with SPME and analysed with GC–MS and several male-specific compounds were observed. The male specific compounds were 3-methyl-3-buten-1-ol, 3-methyl-2-buten-1-ol, 3-methyl-2-butenal, grandisol, fragranol, (Z)-2-(3,3-dimethylcyclohexylidene)-ethanol, (E)-2-(3,3-dimethylcyclohexylidene)-ethanol, (Z)-2-(3,3-dimethylcyclohexylidene)-acetaldehyde, (E)-2-(3,3-dimethylcyclohexylidene)-acetaldehyde, geranial and γ-isogeraniol. (Z)-2-(3,3-dimethylcyclohexylidene)-ethanol, [(Z)-DMCHE], was identified from GC–MS analysis to be the major male-specific compound while the (E)-isomer, [(E)-DMCHE], was found as a minor compound. These two compounds gave positive responses in EAG analyses with antennae from males and females of P. subopacus. Thus, (Z)- and (E)-DMCHE were used in a field experiment in central Sweden but only (Z)-DMCHE was found to be attractive to males and females of P. subopacus. Consequently, (Z)-DMCHE was established to be a component of P. subopacus aggregation pheromone.
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Fegheh-Hassanpour Y, Arif T, Sintim HO, Al Mamari HH, Hodgson DM. Synthesis of (−)-6,7-Dideoxysqualestatin H5 by Carbonyl Ylide Cycloaddition–Rearrangement and Cross-electrophile Coupling. Org Lett 2017. [DOI: 10.1021/acs.orglett.7b01513] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Younes Fegheh-Hassanpour
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - Tanzeel Arif
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - Herman O. Sintim
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - Hamad H. Al Mamari
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
| | - David M. Hodgson
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, United Kingdom
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Ramamoorthy G, Phan RM, Poulter CD. Synthesis and Enzymatic Studies of Isoprenoid Thiolo Bisubstrate Analogues. J Org Chem 2016; 81:5093-100. [DOI: 10.1021/acs.joc.6b00664] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Richard M. Phan
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - C. Dale Poulter
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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Ramamoorthy G, Pugh ML, Tian BX, Phan RM, Perez LB, Jacobson MP, Poulter CD. Synthesis and Enzymatic Studies of Bisubstrate Analogues for Farnesyl Diphosphate Synthase. J Org Chem 2015; 80:3902-13. [DOI: 10.1021/acs.joc.5b00202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Mark L. Pugh
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Bo-Xue Tian
- Department
of Pharmaceutical Chemistry, School of Pharmacy, University of California, San
Francisco, California 94158, United States
- California
Institute for Quantitative Biomedical Research, University of California, San
Francisco, California 94158, United States
| | - Richard M. Phan
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Lawrence B. Perez
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Matthew P. Jacobson
- Department
of Pharmaceutical Chemistry, School of Pharmacy, University of California, San
Francisco, California 94158, United States
- California
Institute for Quantitative Biomedical Research, University of California, San
Francisco, California 94158, United States
| | - C. Dale Poulter
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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Abstract
This article comprehensively reviews the syntheses of all known sex pheromones of scales and mealybugs, describes how they were identified, and how the synthetic pheromones are used in insect management.
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Affiliation(s)
- Yunfan Zou
- Department of Entomology
- University of California
- Riverside
- USA
| | - Jocelyn G. Millar
- Department of Entomology
- University of California
- Riverside
- USA
- Department of Chemistry
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9
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Pepper HP, Tulip SJ, Nakano Y, George JH. Biomimetic Total Synthesis of (±)-Doitunggarcinone A and (+)-Garcibracteatone. J Org Chem 2014; 79:2564-73. [DOI: 10.1021/jo500027k] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Henry P. Pepper
- School of Chemistry & Physics, University of Adelaide, Adelaide 5005, South Australia, Australia
| | - Stephen J. Tulip
- School of Chemistry & Physics, University of Adelaide, Adelaide 5005, South Australia, Australia
| | - Yuji Nakano
- School
of Chemistry, Monash University, Clayton 3800, Victoria, Australia
| | - Jonathan H. George
- School of Chemistry & Physics, University of Adelaide, Adelaide 5005, South Australia, Australia
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Princival JL, Dos Santos AA, Comasseto JV. Functionalized organozincates and organocuprates derived from γ-hydroxytellurides in the preparation of 1,4-hydroxyketones. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.08.097] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Miyauchi H, Chiba S, Fukamizu K, Ando K, Narasaka K. Synthesis of hetero- and carbocycles by nucleophilic substitution at sp2 carbon. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.02.116] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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