51
|
Yin WB, Grundmann A, Cheng J, Li SM. Acetylaszonalenin Biosynthesis in Neosartorya fischeri. J Biol Chem 2009; 284:100-109. [DOI: 10.1074/jbc.m807606200] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
52
|
Yin WB, Cheng J, Li SM. Stereospecific synthesis of aszonalenins by using two recombinant prenyltransferases. Org Biomol Chem 2009; 7:2202-7. [DOI: 10.1039/b902413a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
53
|
Li H, Lee BC, Kim TS, Bae KS, Hong JK, Choi SH, Bao B, Jung JH. Bioactive Cyclic Dipeptides from a Marine Sponge-Associated Bacterium, Psychrobacter sp. Biomol Ther (Seoul) 2008. [DOI: 10.4062/biomolther.2008.16.4.356] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
|
54
|
Koyama N, Inoue Y, Sekine M, Hayakawa Y, Homma H, O̅mura S, Tomoda H. Relative and Absolute Stereochemistry of Quinadoline B, an Inhibitor of Lipid Droplet Synthesis in Macrophages. Org Lett 2008; 10:5273-6. [DOI: 10.1021/ol802089p] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nobuhiro Koyama
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Yusuke Inoue
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Masae Sekine
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Yoichi Hayakawa
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroshi Homma
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Satoshi O̅mura
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroshi Tomoda
- School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan, and Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| |
Collapse
|
55
|
Zhang D, Yang X, Kang JS, Choi HD, Son BW. Circumdatin I, a new ultraviolet-A protecting benzodiazepine alkaloid from a marine isolate of the fungus Exophiala. J Antibiot (Tokyo) 2008; 61:40-2. [PMID: 18305359 DOI: 10.1038/ja.2008.108] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A new ultraviolet-A (UV-A) protecting benzodiazepine alkaloid, circumdatin I (1), along with the previously described circumdatin C (2) and circumdatin G (3), have been isolated from the mycelium of a marine-derived fungus of the genus Exophiala. The structures of the three circumdatins were assigned on the basis of physicochemical evidence. The absolute stereochemistry of 1 was determined by comparison of optical rotation and CD experiments with those of 2 and 3.
Collapse
Affiliation(s)
- Dahai Zhang
- Department of Chemistry, Pukyong National University, Busan, Korea
| | | | | | | | | |
Collapse
|
56
|
Chen Y, Luo Y, Ju J, Wendt-Pienkowski E, Rajski SR, Shen B. Identification of fredericamycin E from Streptomyces griseus: Insights into fredericamycin A biosynthesis highlighting carbaspirocycle formation. JOURNAL OF NATURAL PRODUCTS 2008; 71:431-437. [PMID: 18232659 DOI: 10.1021/np070664n] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Fredericamycin (FDM) A ( 1), a pentadecaketide featuring two sets of peri-hydroxy tricyclic aromatic moieties connected through a unique asymmetric carbaspiro center, exhibits potent cytotoxicity and represents a novel anticancer drug lead. We have localized previously the fdm gene cluster to a 33 kb DNA segment of Streptomyces griseus ATCC49344, the involvement of which in the biosynthesis of 1 was confirmed by gene inactivation, complementation, and heterologous expression experiments. We now report the isolation and characterization of FDM E ( 5), a heretofore undetected intermediate for 1 biosynthesis from S. griseus, shedding new insight into the mechanism of carbaspirocycle formation. The structure of 5 was elucidated through the combination of spectroscopic methods and isotope-labeling experiments. The core spiro[4.5]decane scaffold of 5 is characterized by a unique cyclohexa-1,2,4-triketone moiety. Transformation of the spiro[4.5]decane 5 into the spiro[4.4]nonane 1 can be rationalized by a biosynthetic benzilic acid-like rearrangement. This unusual rearrangement can be mimicked in vitro by proceeding under aerobic conditions in the absence of enzyme. FDM E displays cytotoxic activity on par with 1 against a selected set of cancer cells, a finding that further supports the unique molecular topology, resulting from the unprecedented carbaspirocycle as exemplified by 1 and 5, as a novel pharmacophore for this family of anticancer agents.
Collapse
Affiliation(s)
- Yihua Chen
- Division of Pharmaceutical Sciences, University of Wisconsin, Madison, Wisconsin 53705-2222, USA
| | | | | | | | | | | |
Collapse
|
57
|
|
58
|
Ravindran G, Muthusubramanian S, Selvaraj S, Perumal S. A Simple and Efficient One-Step Synthesis of 2,4,10a-Triaryl-1,10a-Dihydro-2H-Pyrazino[2,1-b][1,3] Benzothiazoles Catalyzed by p-Toluene Sulfonic Acid. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426500601013190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- G. Ravindran
- a Department of Organic Chemistry, School of Chemistry , Madurai Kamaraj University , Madurai , India
| | - S. Muthusubramanian
- a Department of Organic Chemistry, School of Chemistry , Madurai Kamaraj University , Madurai , India
| | - S. Selvaraj
- a Department of Organic Chemistry, School of Chemistry , Madurai Kamaraj University , Madurai , India
| | - S. Perumal
- a Department of Organic Chemistry, School of Chemistry , Madurai Kamaraj University , Madurai , India
| |
Collapse
|
59
|
Abstract
The synthesis of several γ,δ-unsaturated-α-amino acid derivatives is described. The method features regioselective stannylation of propargylglycine derivatives followed by Stille coupling reactions.
Collapse
Affiliation(s)
- Siyuan Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523; University of Colorado Cancer Center, Aurora, CO 80045
| | - Robert M. Williams
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523; University of Colorado Cancer Center, Aurora, CO 80045
| |
Collapse
|
60
|
Mhaske SB, Argade NP. The chemistry of recently isolated naturally occurring quinazolinone alkaloids. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.07.098] [Citation(s) in RCA: 453] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
61
|
Ortiz Barbosa YA, Hart DJ, Magomedov NA. Spiroquinazoline support studies: methods for the preparation of imidazoloindolines from oxindoles. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.103] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
62
|
Rank C, Phipps RK, Harris P, Frisvad JC, Gotfredsen CH, Larsen TO. epi-Aszonalenins A, B, and C from Aspergillus novofumigatus. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.06.086] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
63
|
Appukkuttan P, Van der Eycken E. Microwave-Assisted Natural Product Chemistry. ACTA ACUST UNITED AC 2006. [DOI: 10.1007/128_051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
|
64
|
The structure of some trans-diketopiperazine derivatives of isoquinoline and β-carboline. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
65
|
Proença Barros FA, Rodrigues-Filho E. Four spiroquinazoline alkaloids from Eupenicillium sp. isolated as an endophytic fungus from leaves of Murraya paniculata (Rutaceae). BIOCHEM SYST ECOL 2005. [DOI: 10.1016/j.bse.2004.09.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
66
|
Jiang T, Li T, Li J, Fu HZ, Pei YH, Lin WH. Cerebroside analogues from marine-derived fungus Aspergillus flavipes. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2004; 6:249-257. [PMID: 15621583 DOI: 10.1080/1028602031000147384] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
From the mycelium of the marine-derived fungus Aspergillus flavipes, isolated from the sea anemone Anthopleura xanthogrammica, two new cerebroside analogues, namely flavicerebrosides A (1): [(2S,2'R,3R,4E,8E)-N-2'-hydroxyoctadecanoyl-1-O-beta--galactopyranosyl-9-methyl-4,8-sphingadienine], and B (2): [(2S,2'R,3R,3'E,4E,8E)-N-2'-hydroxy-3'-octadecenoyl-1-O-beta--galactopyranosyl-9-methyl-4,8-sphingadienine], together with two known glycosphingolipids cerebrosides D (3) and C (4), were isolated. Their structures were identified by means of extensive spectroscopic analysis (IR, UV, 2D NMR, MS, CD) and chemical degradation. All four compounds showed cytotoxic activity against the KB cell line.
Collapse
Affiliation(s)
- Ting Jiang
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, China
| | | | | | | | | | | |
Collapse
|
67
|
Rivero IA, Espinoza K, Somanathan R. Syntheses of quinazoline-2,4-dione alkaloids and analogues from Mexican Zanthoxylum species. Molecules 2004; 9:609-16. [PMID: 18007461 DOI: 10.3390/90700609] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2004] [Accepted: 04/26/2004] [Indexed: 11/16/2022] Open
Abstract
Quinazolinone and quinazolinedione derivatives are of considerable interest due to their wide array of pharmacological properties. In this paper we report the synthesis of ten quinazolinediones. The previous isolation of two of these compounds, namely 1-methyl-3-(2'-phenylethyl)-1H,3H-quinazoline-2,4-dione and 1-methyl-3-[2'-(4'- methoxyphenyl)ethyl]-lH,3H-quinazoline-2,4-dione, from the seed husks of Mexican Zanthoxylum species has been reported.
Collapse
Affiliation(s)
- I A Rivero
- Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166. 22000, Tijuana, BC México.
| | | | | |
Collapse
|
68
|
Heredia ML, de la Cuesta E, Avendaño C. Acid-promoted reactions in 1-hydroxy, 1-dimethylaminomethyl and 1-methylene-4-arylmethyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-diones. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00619-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
69
|
Wagner-Döbler I, Beil W, Lang S, Meiners M, Laatsch H. Integrated approach to explore the potential of marine microorganisms for the production of bioactive metabolites. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2002; 74:207-38. [PMID: 11991180 DOI: 10.1007/3-540-45736-4_10] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
During the last 10 years marine organisms have provided a large number of new natural products. Interesting compounds have mainly been derived from macroorganisms such as sponges, ascidians, corals and bryozoans. The number of secondary metabolites from marine microorganisms is smaller, but rapidly increasing. Because of the enormous difficulties involved in harvesting products from marine animals, and the fact that some of the bioactive compounds are produced by associated bacteria, the advantages of sustainable production of bioactive metabolites by bacteria or fungi, under the protection of natural resources, seem to be very attractive for the future. This review describes current progress in the isolation and identification of novel marine microorganisms, the discovery of new secondary metabolites, the biotechnological approaches to overproduce them, as well as the evaluation and characterization of their bioactivity.
Collapse
|
70
|
Yamamoto A, Nakamura K, Furukawa K, Konishi Y, Ogino T, Higashiura K, Yago H, Okamoto K, Otsuka M. A new nonpeptide tachykinin NK1 receptor antagonist isolated from the plants of Compositae. Chem Pharm Bull (Tokyo) 2002; 50:47-52. [PMID: 11824584 DOI: 10.1248/cpb.50.47] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To find new tachykinin NK1 receptor antagonists from natural sources, we examined the tachykinin antagonist activity in the extracts of approximately 200 species of plants by the use of isolated guinea pig ileum. As a result, we discovered a novel and potent NK1 receptor antagonist in the extract of dried flowers of Matricaria chamomilla L. (chamomile). The structure of the antagonist was established as N1,N5,N10,N14-tetrakis[3-(4-hydroxyphenyl)-2-propenoyl]-1,5,10,14-tetraazatetradecane (tetracoumaroyl spermine, 1a). The Ki values of 1a, estimated from the inhibitory action on the substance P (SP)-induced contraction of the guinea pig ileum and the inhibition of the binding of [3H][Sar9, Met(O2)11]SP to human NK1 receptors, were 21.9 nM and 3.3 nM, respectively. 1a is the first potent NK1 receptor antagonist from natural sources and it has a unique structure of a polyacylated spermine. 1a was concentrated in pollen of Matricaria chamomilla L. and was also found in the extracts of flowers of other four species of Compositae. In addition, we found N1,N5,N10-tris[3-(4-hydroxyphenyl)-2-propenoyl]-1,5,10,14-tetraazatetradecane (2) as a new compound in the extract of flowers of Matricaria chamomilla L., which did not exhibit any tachykinin antagonist activity. A number of related compounds were synthesized, and the structure-activity relationship was studied.
Collapse
Affiliation(s)
- Atsushi Yamamoto
- Institute of Bio-Active Science, Nippon Zoki Pharmaceutical Co., Ltd., Hyogo, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
71
|
Abstract
This paper presents a synthesis of ent-alantrypinone (ent-6), the enantiomer of a natural product produced by the fungus Penicillium thymicola. The synthesis revolves around the Li[Me(3)AlSPh]-promoted isomerization of iminobenzoxazine 33 to quinazolinone 34, an N-acyliminium ion cyclization that converts enamide 9 to bridged indole 35, and rearrangement of 35 to oxindole ent-6. Ancillary chemistry that involves thermal fragmentation of an iminobenzoxazine to a nitrile ylide and Me(2)AlSPh-mediated cyclization of oxime ether-ester 22 to pyrrolidinone 23 is also described.
Collapse
Affiliation(s)
- D J Hart
- Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA
| | | |
Collapse
|
72
|
Heredia ML, Cuesta EDL, Avendaño C. Nucleophilic additions to (4 S )-1-alkylidene-2,4-dihydro-1 H -pyrazino[2,1- b ]quinazoline-3,6-diones. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00046-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
73
|
Freed JD, Hart DJ, Magomedov NA. Trapping of the putative cationic intermediate in the Morin rearrangement with carbon nucleophiles. J Org Chem 2001; 66:839-52. [PMID: 11430103 DOI: 10.1021/jo0013406] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This paper presents reactions in which the putative cationic intermediate in the Morin rearrangement is trapped by aromatic carbon nucleophiles (indoles and furans). For example, reaction of sulfoxide 27 with trifluoroacetic acid in chloroform provides, among other products, indole 29 and indoline 30. The indoline was shown to be in equilibrium with the nine-membered ring bridged indole 31. Other examples of Morin rearrangement-trapping reactions are presented, and mechanisms for these transformations are proposed.
Collapse
Affiliation(s)
- J D Freed
- Department of Chemistry, Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, USA
| | | | | |
Collapse
|
74
|
|
75
|
Hart DJ, Magomedov N. Spiroquinazoline Support Studies: New Cascade Reactions Based on the Morin Rearrangement. J Org Chem 1999; 64:2990-2991. [PMID: 11674388 DOI: 10.1021/jo990147c] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David J. Hart
- Department of Chemistry, The Ohio State University, 100 West18th Avenue, Columbus, Ohio 43210
| | | |
Collapse
|
76
|
|
77
|
|