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Zhang GM, Huang Q, Chen G, Yuan M, Zheng CW, Zhang HM, Xu HX. A novel method for age identification of mountain-cultivated ginseng. Microsc Res Tech 2023; 86:1197-1205. [PMID: 37515361 DOI: 10.1002/jemt.24393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/28/2023] [Accepted: 07/16/2023] [Indexed: 07/30/2023]
Abstract
Panax ginseng, a slow-growing perennial herb, is the most praised and popular traditional medicinal herb. Mountain-cultivated ginseng (MCG) and cultivated ginseng (CG) both belong to Panax ginseng C. A. Meyer. The market price and medical effects of this popular health product are closely related to its age. It is widely acknowledged that CG is typically harvested after 4-6 years of growth, but MCG is often collected after 10 years. Until now, the age identification of MCG or mountain wild ginseng (MWG) has remained a major challenge. In this study, we established a novel and rapid method for staining xylem vessels with phloroglucinol and identifying the "annual growth rings" of ginseng by utilizing a stereoscope, which serves as a reliable indicator of the age of MCG. Statistical analysis of the ring radius and the ring density of MCG aged from 1 to 20 years shows that the secondary xylem of MCG increases rapidly in the first 3 years but then gradually slows down from 4 to 10 years, and minor fluctuation is observed in the next 10 years. Meanwhile, the space between the growth rings (ring density) becomes increasingly small with age. This straightforward staining approach can reveal the age of MCG with remarkable clarity and can distinguish MCG from CG. RESEARCH HIGHLIGHTS: A novel rapid staining method for Panax ginseng was established. The age of mountain-cultivated ginseng (MCG) can be identified by microscopic techniques. MCG and cultivated ginseng (CG) can be discriminated by microstructure characteristics.
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Affiliation(s)
- Gong-Min Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Qing Huang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Gan Chen
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Man Yuan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Chang-Wu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Hong-Mei Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Hong-Xi Xu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
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2
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Fang DN, Zheng CW, Ma YL. Effectiveness of Scutellaria baicalensis Georgi root in pregnancy-related diseases: A review. J Integr Med 2023; 21:17-25. [PMID: 36216728 DOI: 10.1016/j.joim.2022.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/04/2022] [Indexed: 01/12/2023]
Abstract
The root of Scutellaria baicalensis Georgi, also called Huangqin, is frequently used in traditional Chinese medicine. In ancient China, S. baicalensis root was used to clear heat, protect the fetus, and avoid a miscarriage for thousands of years. In modern times, pregnancy-related diseases can seriously affect maternal and fetal health, but few systematic studies have explored the mechanisms and potential targets of S. baicalensis root in the treatment of pregnancy-related diseases. Flavonoids (baicalein, wogonin and oroxylin A) and flavonoid glycosides (baicalin and wogonoside) are the main chemical components in the root of S. baicalensis. This study presents the current understanding of the major chemical components in the root of S. baicalensis, focusing on their traditional uses, potential therapeutic effects and ethnopharmacological relevance to pregnancy-related disorders. The mechanisms, potential targets and experimental models of S. baicalensis root for ameliorating pregnancy-related diseases, such as recurrent spontaneous abortion, preeclampsia, preterm birth, fetal growth restriction and gestational diabetes mellitus, are highlighted.
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Affiliation(s)
- Dan-Na Fang
- Medical College, Shaoxing University, Shaoxing 312000, Zhejiang Province, China
| | - Chang-Wu Zheng
- Medical College, Shaoxing University, Shaoxing 312000, Zhejiang Province, China
| | - Ye-Ling Ma
- Medical College, Shaoxing University, Shaoxing 312000, Zhejiang Province, China.
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3
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Zhang H, Jiang JM, Han L, Lao YZ, Zheng D, Chen YY, Wan SJ, Zheng CW, Tan HS, Li ZG, Xu HX. Uncariitannin, a polyphenolic polymer from Uncaria gambier, attenuates Staphylococcus aureus virulence through an MgrA-mediated regulation of α-hemolysin. Pharmacol Res 2019; 147:104328. [PMID: 31288080 DOI: 10.1016/j.phrs.2019.104328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 06/20/2019] [Accepted: 06/21/2019] [Indexed: 10/26/2022]
Abstract
A global transcriptional regulator, MgrA, was previously identified as a key determinant of virulence in Staphylococcus aureus. An 80% EtOH extract of Uncaria gambier was found to attenuate the virulence of S. aureus via its effects on MgrA. Using bioassay-guided fractionation, a polyphenolic polymer, uncariitannin, was found to be the main bioactive constituent of the extract, and its structure was characterized using spectral and chemical analysis. The molecular weight and polydispersity of uncariitannin were determined by gel permeation chromatography-refractive index-light scattering analysis. An electrophoretic mobility shift assay showed that uncariitannin could effectively inhibit the interaction of MgrA with DNA in a dose-dependent manner. Treatment with uncariitannin could decrease the mRNA and protein levels of Hla in both the S. aureus Newman and USA300 LAC strains. Further analysis of Hla expression levels in the Newman ΔmgrA and Newman ΔmgrA/pYJ335-mgrA strains indicated that uncariitannin altered Hla expression primarily in an MgrA-dependent manner. A mouse model of infection indicated that uncariitannin could attenuate MRSA virulence. In conclusion, uncariitannin may be a potential candidate for further development as an antivirulence agent for the treatment of S. aureus infection.
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Affiliation(s)
- Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Jia-Ming Jiang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Li Han
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Yuan-Zhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Dan Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Yu-Yu Chen
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Shi-Jie Wan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Chang-Wu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Hong-Sheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Zi-Gang Li
- School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, Guangdong, 518055, PR China.
| | - Hong-Xi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China.
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4
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Zhang BJ, Fu WW, Wu R, Yang JL, Yao CY, Yan BX, Tan HS, Zheng CW, Song ZJ, Xu HX. Cytotoxic Prenylated Xanthones from the Leaves of Garcinia bracteata. Planta Med 2019; 85:444-452. [PMID: 30650454 DOI: 10.1055/a-0828-9831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Six new prenylated xanthones (1: -6: ) and seventeen known xanthones were isolated from extracts of Garcinia bracteata leaves. Their structures were determined by extensive NMR and MS spectroscopic data analysis. The inhibitory activities of the isolates were assayed on HeLa, A549, PC-3, HT-29, and WPMY-1 cell lines. Compounds 1: and 15: -17: showed moderate inhibitory effects on tumor cell growth, with IC50s ranging from 3.7 to 14.7 µM.
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Affiliation(s)
- Bao-Jun Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
- Department of Pharmacy, ShangHai PuTuo District People Hospital, Shanghai, People's Republic of China
| | - Wen-Wei Fu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
| | - Rong Wu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
| | - Jin-Ling Yang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
| | - Cai-Yun Yao
- Guangxi Botanical Garden of Medicinal Plants, Nanning, People's Republic of China
| | - Bing-Xiong Yan
- Guangxi Botanical Garden of Medicinal Plants, Nanning, People's Republic of China
| | - Hong-Sheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
| | - Chang-Wu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
| | - Zhi-Jun Song
- Guangxi Botanical Garden of Medicinal Plants, Nanning, People's Republic of China
| | - Hong-Xi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, People's Republic of China
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5
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Zhang BJ, Fu WW, Wu R, Yang JL, Yao CY, Yan BX, Tan HS, Zheng CW, Song ZJ, Xu HX. Bioactive scalemic caged xanthones from the leaves of Garcinia bracteata. Bioorg Chem 2019; 82:274-283. [DOI: 10.1016/j.bioorg.2018.10.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/18/2018] [Accepted: 10/22/2018] [Indexed: 01/22/2023]
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6
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Zheng D, Zhang H, Zheng CW, Lao YZ, Xu DQ, Xiao LB, Xu HX. Garciyunnanimines A–C, novel cytotoxic polycyclic polyprenylated acylphloroglucinol imines from Garcinia yunnanensis. Org Chem Front 2017. [DOI: 10.1039/c7qo00485k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel cytotoxic PPAP imines from G. yunnanensis and the biomimetic synthesis of PPAP imines from corresponding PPAPs.
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Affiliation(s)
- Dan Zheng
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Hong Zhang
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Chang-Wu Zheng
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
- Key Laboratory of Synthetic Chemistry of Natural Substances
| | - Yuan-Zhi Lao
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Dan-Qing Xu
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Lian-Bo Xiao
- Institute of Arthritis Research
- Shanghai Academy of Chinese Medical Sciences
- Guanghua Integrative Medicine Hospital
- Shanghai 201203
- China
| | - Hong-Xi Xu
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
- Institute of Arthritis Research
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7
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Huang YM, Liu Y, Zheng CW, Jin QW, Pan L, Pan RM, Liu J, Zhao G. Total Synthesis of Gelsedilam by Means of a Thiol-Mediated Diastereoselective Conjugate Addition-Aldol Reaction. Chemistry 2016; 22:18339-18342. [DOI: 10.1002/chem.201604620] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Indexed: 11/10/2022]
Affiliation(s)
- You-Ming Huang
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Yang Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Chang-Wu Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Qiao-Wen Jin
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Lu Pan
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Ren-Ming Pan
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Jun Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
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8
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Zhang JX, Wang HY, Jin QW, Zheng CW, Zhao G, Shang YJ. Thiourea–Quaternary Ammonium Salt Catalyzed Asymmetric 1, 3-Dipolar Cycloaddition of Imino Esters To Construct Spiro[pyrrolidin-3,3′-oxindoles]. Org Lett 2016; 18:4774-4777. [DOI: 10.1021/acs.orglett.6b02098] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jia-Xing Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Hong-Yu Wang
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qiao-Wen Jin
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Chang-Wu Zheng
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Gang Zhao
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yong-Jia Shang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
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9
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Lou YP, Zheng CW, Pan RM, Jin QW, Zhao G, Li Z. Enantioselective Direct Mannich Reactions of Cyclic β-Ketoesters Catalyzed by Chiral Phosphine via a Novel Dual-Reagent Catalysis. Org Lett 2015; 17:688-91. [DOI: 10.1021/ol503712m] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yan-Peng Lou
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Chang-Wu Zheng
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ren-Ming Pan
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qiao-Wen Jin
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Gang Zhao
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhong Li
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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10
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Wang HY, Zhang K, Zheng CW, Chai Z, Cao DD, Zhang JX, Zhao G. Asymmetric Dual-Reagent Catalysis: Mannich-type Reactions Catalyzed by Ion Pair. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409342] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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11
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Wang HY, Zhang K, Zheng CW, Chai Z, Cao DD, Zhang JX, Zhao G. Asymmetric Dual-Reagent Catalysis: Mannich-type Reactions Catalyzed by Ion Pair. Angew Chem Int Ed Engl 2014; 54:1775-9. [DOI: 10.1002/anie.201409342] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 11/14/2014] [Indexed: 11/06/2022]
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12
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Ying Y, Chai Z, Wang HF, Li P, Zheng CW, Zhao G, Cai YP. Bifunctional cinchona alkaloids-catalyzed asymmetric [4+2] cycloaddition reaction of β,γ-unsaturated α-keto esters with oxazolones. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.069] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Chen XK, Zheng CW, Zhao SL, Chai Z, Yang YQ, Zhao G, Cao WG. Highly Enantioselective Michael Addition of Cyclic 1,3-Dicarbonyl Compounds to β,γ-Unsaturated α-Keto Esters. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000045] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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15
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Xiao H, Chai Z, Zheng CW, Yang YQ, Liu W, Zhang JK, Zhao G. Asymmetric [3+2] Cycloadditions of Allenoates and Dual Activated Olefins Catalyzed by Simple Bifunctional N-Acyl Aminophosphines. Angew Chem Int Ed Engl 2010; 49:4467-70. [DOI: 10.1002/anie.201000446] [Citation(s) in RCA: 278] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Xiao H, Chai Z, Zheng CW, Yang YQ, Liu W, Zhang JK, Zhao G. Asymmetric [3+2] Cycloadditions of Allenoates and Dual Activated Olefins Catalyzed by Simple Bifunctional N-Acyl Aminophosphines. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000446] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Yang YQ, Chai Z, Wang HF, Chen XK, Cui HF, Zheng CW, Xiao H, Li P, Zhao G. Chiral Primary-Secondary Diamines Catalyzed Michael-Aldol-Dehydration Reaction between Benzoylacetates and α,β-Unsaturated Ketones: Highly Enantioselective Synthesis of Functionalized Chiral Cyclohexenones. Chemistry 2009; 15:13295-8. [DOI: 10.1002/chem.200901541] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Cui HF, Yang YQ, Chai Z, Li P, Zheng CW, Zhu SZ, Zhao G. Enantioselective Synthesis of Functionalized Fluorinated Cyclohexenones via Robinson Annulation Catalyzed by Primary−Secondary Diamines. J Org Chem 2009; 75:117-22. [DOI: 10.1021/jo902081w] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hai-Feng Cui
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
| | - Ying-Quan Yang
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
| | - Zhuo Chai
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
| | - Peng Li
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
| | - Chang-Wu Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
| | - Shi-Zheng Zhu
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Lu, Shanghai 200032, China
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19
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Wang HF, Cui HF, Chai Z, Li P, Zheng CW, Yang YQ, Zhao G. Asymmetric Synthesis of Fluorinated Flavanone Derivatives by an Organocatalytic Tandem Intramolecular Oxa-Michael Addition/Electrophilic Fluorination Reaction by Using Bifunctional Cinchona Alkaloids. Chemistry 2009; 15:13299-303. [PMID: 19899096 DOI: 10.1002/chem.200902303] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hai-Feng Wang
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, 345 LingLing Lu, Shanghai, 200032, China
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20
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Zhao SL, Zheng CW, Wang HF, Zhao G. Highly Enantioselective Michael Addition of α-Substituted Cyano Ketones to β,γ-Unsaturated α-Keto Esters using Bifunctional Thiourea-Tertiary Amine Catalysts: An Easy Access to Chiral Dihydropyrans. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900516] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Li P, Chai Z, Zhao SL, Yang YQ, Wang HF, Zheng CW, Cai YP, Zhao G, Zhu SZ. Highly enantio- and diastereoselective synthesis of alpha-trifluoromethyldihydropyrans using a novel bifunctional piperazine-thiourea catalyst. Chem Commun (Camb) 2009:7369-71. [PMID: 20024231 DOI: 10.1039/b915210e] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first enantioselective Michael addition of alpha-cyanoketones to alpha,beta-unsaturated trifluoromethyl ketones using a novel piperazine-thiourea catalyst was described. The resulting alpha-trifluoromethyldihydropyrans were obtained in high yields and with up to 95% ee within a short reaction time. A useful transformation of the chiral adduct was also illustrated.
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Affiliation(s)
- Peng Li
- Key Laboratory of Organofluorine Chemistry and Key Laboratory of Modern Synthetic Organic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai, 200032, China
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Wang XS, Zheng CW, Zhao SL, Chai Z, Zhao G, Yang GS. Organocatalyzed Friedel–Craft-type reaction of 2-naphthol with β,γ-unsaturated α-keto ester to form novel optically active naphthopyran derivatives. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.11.025] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wang HF, Zheng CW, Yang YQ, Chai Z, Zhao G. An unexpected tandem enantioselective Michael addition/oxa-nucleophilic rearrangement reaction of β,γ-unsaturated α-keto esters catalyzed by cinchona alkaloids. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zhao YH, Zheng CW, Zhao G, Cao WG. Highly enantioselective tandem cyclopropanation/Wittig reaction of α,β-unsaturated aldehydes with arsonium ylides catalyzed by recyclable dendritic catalyst. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.02.022] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zheng CW, Hong W, Lin FG. [Trial vaginal delivery for women with previous cesarean section]. Zhonghua Fu Chan Ke Za Zhi 1994; 29:456-7, 508. [PMID: 7835113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A retrospective analysis was made on 85 cases of trial labor after previous cesarean section (CS) and compared with 100 primiparous vaginal deliveries (as control) during the last 10 years. Oxytocin infusion has been used in 61 trial cases to induce and/or to accelerate labor, and valium, procaine and atropine administered during the labor process in 23 of them. 65 of the 85 cases (76.5%) successfully delivered through the vagina (VD group), while 20 cases (23.5%) had repeat CS following failure in trial labor (CS group), and 3 women had reatened uterine rupture. There was 1 neonatal death in the VD trial labor group. No obvious difference in the Apgar scores of newborns was found between the CS group and the controls, and the duration of the labor process was much shorter in the VD trial group than that in the primiparae (7.51 +/- 2.44 hrs vs. 9.10 +/- 3.75 hrs) (P < 0.01). This study indicated that following a previous uneventful transverse lower segment cesarean section, trial labor should be encouraged under supervision.
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Affiliation(s)
- C W Zheng
- First Affiliated Hospital of Wenzhou Medical College
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