101
|
Baylis–Hillman carbonates in organic synthesis: a convenient one-pot strategy for nitrone–spiro-oxindole frameworks. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
102
|
Sun J, Xie YJ, Yan CG. Construction of Dispirocyclopentanebisoxindoles via Self-Domino Michael-Aldol Reactions of 3-Phenacylideneoxindoles. J Org Chem 2013; 78:8354-65. [DOI: 10.1021/jo4010603] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jing Sun
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Ya-Jing Xie
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Chao-Guo Yan
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| |
Collapse
|
103
|
Mondal P, Argade NP. Enantioselective Total Synthesis of Desbromoarborescidines A–C and the Formal Synthesis of (S)-Deplancheine. J Org Chem 2013; 78:6802-8. [DOI: 10.1021/jo401079v] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Pravat Mondal
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India
| | - Narshinha P. Argade
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India
| |
Collapse
|
104
|
Bhunia S, Ghosh S, Dey D, Bisai A. DDQ-mediated Direct Intramolecular-Dehydrogenative-Coupling (IDC): Expeditious Approach to the Tetracyclic Core of Ergot Alkaloids. Org Lett 2013; 15:2426-9. [DOI: 10.1021/ol400899e] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Subhajit Bhunia
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, MP − 462 023, India
| | - Santanu Ghosh
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, MP − 462 023, India
| | - Dhananjay Dey
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, MP − 462 023, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, MP − 462 023, India
| |
Collapse
|
105
|
Chen M, Shao CL, Fu XM, Xu RF, Zheng JJ, Zhao DL, She ZG, Wang CY. Bioactive indole alkaloids and phenyl ether derivatives from a marine-derived Aspergillus sp. Fungus. JOURNAL OF NATURAL PRODUCTS 2013; 76:547-553. [PMID: 23527875 DOI: 10.1021/np300707x] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Two new prenylated indole alkaloids, 17-epi-notoamides Q and M (1 and 2), and two new phenyl ether derivatives, cordyols D and E (9 and 13), together with 10 known compounds (3-8, 10-12, 14) were isolated from a marine-derived Aspergillus sp. fungus. Among them, 1/5 and 2/4 were pairs of epimers. The planar structures and absolute configurations of the new compounds were determined by extensive NMR spectroscopic data as well as CD spectra. The absolute configuration of 3 was confirmed by single-crystal X-ray diffraction analysis for the first time. All isolated metabolites (1-14) and eight synthetic phenyl ether derivatives (12a, 14a-14g) were evaluated for their antibacterial activities in vitro. The polybromide phenyl ether 14g showed pronounced antibacterial activity against Staphylococcus epidermidis with an MIC value of 0.556 μM, stronger than that of the positive control ciprofloxacin (MIC = 3.13 μM).
Collapse
Affiliation(s)
- Min Chen
- Key Laboratory of Marine Drugs, the Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
106
|
Cai S, Luan Y, Kong X, Zhu T, Gu Q, Li D. Isolation and Photoinduced Conversion of 6-epi-Stephacidins from Aspergillus taichungensis. Org Lett 2013; 15:2168-71. [DOI: 10.1021/ol400694h] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shengxin Cai
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, P. R. China
| | - Yepeng Luan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, P. R. China
| | - Xianglan Kong
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, P. R. China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, P. R. China
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, P. R. China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, 266003, P. R. China
| |
Collapse
|
107
|
Multi-mycotoxin screening reveals the occurrence of 139 different secondary metabolites in feed and feed ingredients. Toxins (Basel) 2013; 5:504-23. [PMID: 23529186 PMCID: PMC3705275 DOI: 10.3390/toxins5030504] [Citation(s) in RCA: 216] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 02/07/2013] [Accepted: 02/22/2013] [Indexed: 11/30/2022] Open
Abstract
The development of liquid chromatography-mass spectrometry (LC-MS)/mass spectrometry (MS) methods for the simultaneous detection and quantification of a broad spectrum of mycotoxins has facilitated the screening of a larger number of samples for contamination with a wide array of less well-known “emerging” mycotoxins and other metabolites. In this study, 83 samples of feed and feed raw materials were analysed. All of them were found to contain seven to 69 metabolites. The total number of detected metabolites amounts to 139. Fusarium mycotoxins were most common, but a number of Alternaria toxins also occurred very often. Furthermore, two so-called masked mycotoxins (i.e., mycotoxin conjugates), namely deoxynivalenol-3-glucoside (75% positives) and zearalenone-4-sulfate (49% positives), were frequently detected. Although the observed median concentrations of the individual analytes were generally in the low μg/kg range, evaluating the toxicological potential of a given sample is difficult. Toxicity data on less well-known mycotoxins and other detected metabolites are notoriously scarce, as an overview on the available information on the most commonly detected metabolites shows. Besides, the possible synergistic effects of co-occurring substances have to be considered.
Collapse
|
108
|
Affiliation(s)
- Stephen W. Laws
- Department of Chemistry, The College of William & Mary, P.O. Box 8795, Williamsburg,
Virginia 23187, United States
| | - Jonathan R. Scheerer
- Department of Chemistry, The College of William & Mary, P.O. Box 8795, Williamsburg,
Virginia 23187, United States
| |
Collapse
|
109
|
Basavaiah D, Badsara SS, Sahu BC. Baylis-Hillman Bromides as a Source of 1,3-Dipoles: Sterically Directed Synthesis of Oxindole-Fused Spirooxirane and Spirodihydrofuran Frameworks. Chemistry 2013; 19:2961-5. [DOI: 10.1002/chem.201203756] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Indexed: 01/23/2023]
|
110
|
R. Suárez Castillo O, Meléndez-Rodríguez M, Aristeo-Dominguez A, M. A. Contreras-Martínez Y, Suárez-Ramírez L, Trejo-Carbajal N, Joseph-Nathan P. Dimethyldioxirane Oxidation of N-Substituted-2-methylindoles to Indoxyls and Bisindoxyls. HETEROCYCLES 2013. [DOI: 10.3987/com-13-12669] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
111
|
Sunderhaus JD, McAfoos TJ, Finefield JM, Kato H, Li S, Tsukamoto S, Sherman DH, Williams RM. Synthesis and bioconversions of notoamide T: a biosynthetic precursor to stephacidin A and notoamide B. Org Lett 2012; 15:22-5. [PMID: 23249380 DOI: 10.1021/ol302901p] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In an effort to further elucidate the biogenesis of the stephacidin and notoamide families of natural products, notoamide T has been identified as the likely precursor to stephacidin A. The total synthesis of notoamide T is described along with it is C-6-epimer, 6-epi-notoamide T. The chemical conversion of stephacidin A to notoamide T by reductive ring opening is described as well as the oxidative conversion of notoamide T to stephacidin A. Furthermore, [(13)C](2)-notoamide T was synthesized and provided to Aspergillus versicolor and Aspergillus sp. MF297-2, in which significant incorporation was observed in the advanced metabolite, notoamide B.
Collapse
Affiliation(s)
- James D Sunderhaus
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | | | | | | | | | | | | | | |
Collapse
|
112
|
Yang Q, Wang L, Guo T, Yu Z. FeCl3·6H2O-Catalyzed Alkenylation of Indoles with Aldehydes. J Org Chem 2012; 77:8355-61. [DOI: 10.1021/jo301416s] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Qin Yang
- Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China
| | - Liandi Wang
- Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China
| | - Tenglong Guo
- Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China
| | - Zhengkun Yu
- Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, China
- State Key Laboratory of Organometallic Chemistry,
Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| |
Collapse
|