1
|
Total synthesis of the reported structure of bioactive dibenzofuran natural product karnatakafuran B. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
|
2
|
Total syntheses of carbazole alkaloid mukoenine A and pyrano[3,2-a]carbazole alkaloid girinimbine. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
3
|
Deng C, Liu Y, Xu M, Xie K, Liu S. Exploiting an intramolecular Diels-Alder cyclization/dehydro-aromatization sequence for the total syntheses of ellipticines and calothrixin B. Org Biomol Chem 2021; 19:1395-1403. [PMID: 33491728 DOI: 10.1039/d0ob02527e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The tetracyclic and pentacyclic skeletons of pyrido and quinolinocarbazole alkaloids have been synthesized via a unified strategy. The prominent key step involved a Diels-Alder intramolecular cyclization/dehydro-aromatization sequence. From these carbazole-lactam cores, linear syntheses have been developed for ellipticines and calothrixin B.
Collapse
Affiliation(s)
- Chengdan Deng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China. and Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China.
| | - Yuancui Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China. and Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China.
| | - Mei Xu
- Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China.
| | - Kaiqiang Xie
- Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China.
| | - Sheng Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China. and Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, Guiyang 550014, China.
| |
Collapse
|
4
|
Liu Y, Xu M, Xie K, Liu S. Total Synthesis of Calothrixin B
via
an Intramolecular Baylis‐Hillman Cyclization/6π Electrocyclization/Dehydro‐aromatization Sequence and a Specific Oxidative Quinone Formation. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuancui Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Guiyang 550014 PR China
| | - Mei Xu
- Key Laboratory of Chemistry for Natural Products of Guizhou Province Chinese Academy of Sciences Guiyang 550014 China
| | - Kaiqiang Xie
- Key Laboratory of Chemistry for Natural Products of Guizhou Province Chinese Academy of Sciences Guiyang 550014 China
| | - Sheng Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Guiyang 550014 PR China
- Key Laboratory of Chemistry for Natural Products of Guizhou Province Chinese Academy of Sciences Guiyang 550014 China
| |
Collapse
|
5
|
Nishiyama T, Takaiwa S, Kotouge R, Tani S, Yoshinaga R, Hamada E, Endo M, Sugino Y, Hatae N, Hibino S, Choshi T. First asymmetric enantioselective total synthesis of phenanthridine alkaloid, (S)-(+)-asiaticumine and its enantiomer. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
6
|
Transition metal catalyzed C-H activation for the synthesis of medicinally relevant molecules: A Review. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1468-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
7
|
Lin K, Jian Y, Zhao P, Zhao CS, Pan WD, Liu S. A rapid construction of a specific quino[4,3-b] carbazolone system and its application for the synthesis of calothrixin B. Org Chem Front 2018. [DOI: 10.1039/c7qo00864c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An efficient methodology is developed for the synthesis of functionalized specific carbazole lactams related to pyrido[4,3-b]- and quino[4,3-b] carbazole alkaloids.
Collapse
Affiliation(s)
- Kai Lin
- Zunyi Medical University
- Zunyi 563000
- P. R. China
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
| | - Yong Jian
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
| | - Peng Zhao
- College of Pharmacy
- Guizhou University
- Guiyang 550014
- PR China
| | - Chun-shen Zhao
- College of Pharmacy
- Guizhou University
- Guiyang 550014
- PR China
| | - Wei-dong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
| | - Sheng Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants
- Guizhou Medical University
- Guiyang 550014
- PR China
| |
Collapse
|
8
|
Choshi T, Nishiyama T, Fujiwaki T, Hatae N, Uchiyama E, Takeuchi N, Minami K, Ishikura M, Hibino S, Yokoyama C, Kinoshita T. Concise Synthesis of Azafluorenone and Its Application to Indeno[1,2-c]isoquinolone. HETEROCYCLES 2018. [DOI: 10.3987/com-18-s(t)26] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
9
|
Concise synthesis and antiproliferative activity evaluation of ellipticine quinone and its analogs. Eur J Med Chem 2017; 136:1-13. [DOI: 10.1016/j.ejmech.2017.04.071] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 11/24/2022]
|
10
|
Nishiyama T, Hatae N, Yoshimura T, Takaki S, Abe T, Ishikura M, Hibino S, Choshi T. Concise synthesis of carbazole-1,4-quinones and evaluation of their antiproliferative activity against HCT-116 and HL-60 cells. Eur J Med Chem 2016; 121:561-577. [DOI: 10.1016/j.ejmech.2016.05.065] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/28/2016] [Accepted: 05/30/2016] [Indexed: 10/21/2022]
|
11
|
Guo J, Kiran IC, Gao J, Reddy RS, He Y. Total synthesis of calothrixins and their analogues via formal [3+2] cycloaddition of arynes and 2-aminophenanthridinedione. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.091] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
12
|
Hibino S. Synthetic Studies of Bioactive Heterocyclic Natural Products and Fused Heterocyclic Compounds Based on the Thermal Electrocyclic or Azaelectocyclic Reaction of 6π-Electron or Aza-6π-electron Systems. YAKUGAKU ZASSHI 2016; 136:607-48. [DOI: 10.1248/yakushi.15-00273] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Satoshi Hibino
- Graduate School of Pharmacy and Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University
| |
Collapse
|
13
|
Cyanobacterial Metabolite Calothrixins: Recent Advances in Synthesis and Biological Evaluation. Mar Drugs 2016; 14:17. [PMID: 26771620 PMCID: PMC4728514 DOI: 10.3390/md14010017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 12/22/2015] [Accepted: 01/04/2016] [Indexed: 12/30/2022] Open
Abstract
The marine environment is host to unparalleled biological and chemical diversity, making it an attractive resource for the discovery of new therapeutics for a plethora of diseases. Compounds that are extracted from cyanobacteria are of special interest due to their unique structural scaffolds and capacity to produce potent pharmaceutical and biotechnological traits. Calothrixins A and B are two cyanobacterial metabolites with a structural assembly of quinoline, quinone, and indole pharmacophores. This review surveys recent advances in the synthesis and evaluation of the biological activities of calothrixins. Due to the low isolation yields from the marine source and the promise this scaffold holds for anticancer and antimicrobial drugs, organic and medicinal chemists around the world have embarked on developing efficient synthetic routes to produce calothrixins. Since the first review appeared in 2009, 11 novel syntheses of calothrixins have been published in the efforts to develop methods that contain fewer steps and higher-yielding reactions. Calothrixins have shown their potential as topoisomerase I poisons for their cytotoxicity in cancer. They have also been observed to target various aspects of RNA synthesis in bacteria. Further investigation into the exact mechanism for their bioactivity is still required for many of its analogs.
Collapse
|
14
|
Choshi T, Hibino S, Nishiyama T, Satsuki N, Fujii M, Abe T, Ishikura M. Total Synthesis of Carbazole-1,4-quinone Alkaloid Koeniginequinones A and B Based on a One-Pot Cyclocarbonylation Procedure from 2-Alkenyl-3-iodoiodoindole. HETEROCYCLES 2016. [DOI: 10.3987/com-15-s(t)5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
15
|
Lim JW, Kim SH, Kim J, Kim JN. Synthesis of Benzo[a]carbazoles from 2-Arylindolesviaa Sequential Propargylation, Propargyl-Allenyl Isomerization, and 6π-Electrocyclization. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10258] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jin Woo Lim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Se Hee Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Jimin Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Jae Nyoung Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| |
Collapse
|
16
|
Ramkumar N, Nagarajan R. Formal total synthesis of calothrixin B and its N-benzyl analogues. RSC Adv 2015. [DOI: 10.1039/c5ra18120h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
A formal total synthesis of calothrixin B and its N-benzyl analogues has been reported from (2-chlorophenyl)boronic acid, 8-bromophenanthridine-dione and benzylamines.
Collapse
|
17
|
Hibino S, Choshi T, Hironaka M, Goto M, Shimizu K, Kurata Y, Nishiyama T, Hatae N. Novel Total Synthesis of the 2-Azaanthraquinone Alkaloid Scorpinone Using a Tandem Oxidation and Azaelectrocyclic Reaction. HETEROCYCLES 2015. [DOI: 10.3987/com-14-13155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
18
|
Yadav AK, Yadav LDS. Visible-light-driven electrocyclization of activated allylic amines via azomethine ylide formation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.063] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
19
|
Ramkumar N, Nagarajan R. Total synthesis of calothrixin B via sequential Sonogashira coupling/copper-catalyzed oxidative cyclization. Org Biomol Chem 2015; 13:11046-51. [DOI: 10.1039/c5ob01766a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A total synthesis of the antimalarial indolo[3,2-j]phenanthridine alkaloid calothrixin B is reported.
Collapse
|
20
|
Dethe DH, Murhade GM. Diversity-Oriented Synthesis of Calothrixins and Ellipticines. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402837] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
21
|
Synthesis of 1H-benzo[g]indazole derivatives: propargyl–allenyl isomerization and 6π-electrocyclization involving two aromatic π-bonds. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
22
|
Hatae N, Satoh R, Chiba H, Osaki T, Nishiyama T, Ishikura M, Abe T, Hibino S, Choshi T, Okada C, Toyota E. N-Substituted calothrixin B derivatives inhibited the proliferation of HL-60 promyelocytic leukemia cells. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1061-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
Fujii M, Nishiyama T, Choshi T, Satsuki N, Fujiwaki T, Abe T, Ishikura M, Hibino S. A novel one-pot synthesis of carbazole-1,4-quinones through Pd-catalyzed cyclocarbonylation, desilylation and oxidation processes from 3-iodo-2-propenylindoles. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.01.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
24
|
Ramkumar N, Nagarajan R. Total synthesis of ellipticine quinones, olivacine, and calothrixin B. J Org Chem 2014; 79:736-41. [PMID: 24372379 DOI: 10.1021/jo402593w] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A direct route to the synthesis of biologically active ellipticine quinones, olivacine, and calothrixin B is described. The prominent key steps involved are Friedel-Crafts hydroxyalkylation followed by oxidation and directed ortho-lithiation reactions of readily available indole-2-carboxylate esters with appropriately substituted pyridine and quinoline carboxaldehydes.
Collapse
|
25
|
Choshi T, Hibino S, Kurata Y, Ishihara Y, Hatae N, Nishiyama T. Total Synthesis of the Benzo[c]phenanthridine Alkaloids, Terihanine and Isoterihanine, and Their Antitumor Activity. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
26
|
Hieda Y, Choshi T, Fujioka H, Hibino S. Total Synthesis of the Neuronal Cell-Protecting Carbazole Alkaloids Carbazomadurin A and (S)-(+)-Carbazomadurin B. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301059] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
27
|
Ramkumar N, Nagarajan R. Total Synthesis of Calothrixin A and B via C–H Activation. J Org Chem 2013; 78:2802-7. [DOI: 10.1021/jo302821v] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
28
|
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido
| |
Collapse
|
29
|
Abe T, Ikeda T, Choshi T, Hibino S, Hatae N, Toyata E, Yanada R, Ishikura M. Total Synthesis of Calothrixins A and B by Palladium-Catalyzed Tandem Cyclization/Cross-Coupling Reaction of Indolylborate. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200657] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
30
|
Matsumoto K, Choshi T, Hourai M, Zamami Y, Sasaki K, Abe T, Ishikura M, Hatae N, Iwamura T, Tohyama S, Nobuhiro J, Hibino S. Synthesis and antimalarial activity of calothrixins A and B, and their N-alkyl derivatives. Bioorg Med Chem Lett 2012; 22:4762-4. [PMID: 22727670 DOI: 10.1016/j.bmcl.2012.05.064] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 05/09/2012] [Accepted: 05/16/2012] [Indexed: 11/16/2022]
Abstract
We synthesized calothrixin B using our developed biomimetic method and derived N-alkyl-calothrixins A and B. The in vitro antimalarial activity of the calothrixin derivatives, including calothrixins A and B, against the Plasmodium falciparum FCR-3 strain was evaluated. All test compounds exhibited antimalarial activity over a concentration range of 6.4×10(-6)-1.2×10(-7) M.
Collapse
Affiliation(s)
- Kohji Matsumoto
- Graduate School of Pharmacy & Pharmaceutical Sciences, and Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Fukuyama, Hiroshima 729-0292, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Schmidt AW, Reddy KR, Knölker HJ. Occurrence, Biogenesis, and Synthesis of Biologically Active Carbazole Alkaloids. Chem Rev 2012; 112:3193-328. [PMID: 22480243 DOI: 10.1021/cr200447s] [Citation(s) in RCA: 899] [Impact Index Per Article: 74.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Arndt W. Schmidt
- Department Chemie, Technische Universität Dresden,
Bergstrasse 66, 01069 Dresden, Germany
| | - Kethiri R. Reddy
- Department Chemie, Technische Universität Dresden,
Bergstrasse 66, 01069 Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden,
Bergstrasse 66, 01069 Dresden, Germany
| |
Collapse
|
32
|
Abe T, Ikeda T, Yanada R, Ishikura M. Concise Total Synthesis of Calothrixins A and B. Org Lett 2011; 13:3356-9. [DOI: 10.1021/ol201107a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan, and Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan
| | - Toshiaki Ikeda
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan, and Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan
| | - Reiko Yanada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan, and Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan
| | - Minoru Ishikura
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan, and Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan
| |
Collapse
|
33
|
Ishihara Y, Azuma S, Choshi T, Kohno K, Ono K, Tsutsumi H, Ishizu T, Hibino S. Total synthesis of benzo[c]phenanthridine alkaloids based on a microwave-assisted electrocyclic reaction of the aza 6π-electron system and structural revision of broussonpapyrine. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.066] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
34
|
Hibino S, Choshi T. Synthetic Studies on Nitrogen-Containing Fused-Heterocyclic Compounds Based on Thermal Electrocyclic Reactions of 6π-Electron and Aza 6π-Electron Systems. HETEROCYCLES 2011. [DOI: 10.3987/rev-10-691] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
35
|
A novel total synthesis of the bioactive poly-substituted carbazole alkaloid carbazomadurin A. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.05.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
36
|
Hibino S, Choshi T, Tohyama S, Matsumoto K, Yamabuki A, Hieda Y, Nobuhiro J. Total Synthesis of Bioactive Indolo[3,2-j]phenanthridine Alkaloid, Calothrixin B. HETEROCYCLES 2010. [DOI: 10.3987/com-10-s(e)11] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
37
|
Ishikura M, Yamada K, Abe T. Simple indole alkaloids and those with a nonrearranged monoterpenoid unit. Nat Prod Rep 2010; 27:1630-80. [DOI: 10.1039/c005345g] [Citation(s) in RCA: 210] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|