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Shirsat PK, Narasimhulu V, Kumbhare RM. Acid‐Catalyzed Four‐Component Tandem Double Cyclization: Access to Dihydroindolizino[8,7‐
b
]indoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201901831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Prashishkumar K. Shirsat
- Department of Fluro-agro ChemicalsCSIR-Indian Institute of Chemical Technology Uppal Road, Tarnaka Hyderabad- 500 007 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002 India
| | - Valipenta Narasimhulu
- Department of Fluro-agro ChemicalsCSIR-Indian Institute of Chemical Technology Uppal Road, Tarnaka Hyderabad- 500 007 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002 India
| | - Ravindra M. Kumbhare
- Department of Fluro-agro ChemicalsCSIR-Indian Institute of Chemical Technology Uppal Road, Tarnaka Hyderabad- 500 007 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002 India
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Cai Q, Li DK, Zhou RR, Shu WM, Wu YD, Wu AX. Acid-Catalyzed Multicomponent Tandem Cyclizations: Access to Polyfunctional Dihydroindolizino[8,7-b]indoles. Org Lett 2016; 18:1342-5. [PMID: 26926047 DOI: 10.1021/acs.orglett.6b00281] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Qun Cai
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Deng-Kui Li
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Rong-Rong Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Wen-Ming Shu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei, Wuhan 430079, P. R. China
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Gao Y, Zhou DS, Hai P, Li Y, Wang F. Hybrid Monoterpenoid Indole Alkaloids Obtained as Artifacts from Rauvolfia tetraphylla. NATURAL PRODUCTS AND BIOPROSPECTING 2015; 5:247-253. [PMID: 26416155 PMCID: PMC4607677 DOI: 10.1007/s13659-015-0074-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 09/24/2015] [Indexed: 05/31/2023]
Abstract
Five new hybrid monoterpenoid indole alkaloids bearing an unusual 2,2-dimethyl-4-oxopiperidin-6-yl moiety, namely rauvotetraphyllines F-H (1, 3, 4), 17-epi-rauvotetraphylline F (2) and 21-epi-rauvotetraphylline H (5), were isolated from the aerial parts of Rauvolfia tetraphylla. Their structures were established by extensive spectroscopic analysis. The new alkaloids were evaluated for their cytotoxicity in vitro against five human cancer cell lines.
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Affiliation(s)
- Yuan Gao
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
- Department of Chemical Engineering, Yibin University, Yibin, 644000, People's Republic of China
| | - Dong-Sheng Zhou
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
| | - Ping Hai
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China
| | - Yan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Fei Wang
- BioBioPha Co., Ltd., Kunming, 650201, People's Republic of China.
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Edwankar R, Edwankar CR, Deschamps JR, Cook JM. General strategy for synthesis of C-19 methyl-substituted sarpagine/macroline/ajmaline indole alkaloids including total synthesis of 19(S),20(R)-dihydroperaksine, 19(S),20(R)-dihydroperaksine-17-al, and peraksine. J Org Chem 2014; 79:10030-48. [PMID: 25247616 PMCID: PMC4227583 DOI: 10.1021/jo5016163] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Indexed: 11/28/2022]
Abstract
A detailed account of the development of a general strategy for synthesis of the C-19 methyl-substituted alkaloids including total synthesis of 19(S),20(R)-dihydroperaksine-17-al (1), 19(S),20(R)-dihydroperaksine (2), and peraksine (6) is presented. Efforts directed toward the total synthesis of macrosalhine chloride (5) are also reported. Important to success is the sequence of chemical reactions which include a critical haloboration reaction, regioselective hydroboration, and controlled oxidation (to provide sensitive enolizable aldehydes at C-20). In addition, the all-important Pd-catalyzed α-vinylation reaction has been extended to a chiral C-19 alkyl-substituted substrate for the first time. Synthesis of the advanced intermediate 64 completes an improved formal total synthesis of talcarpine (26) and provides a starting point for synthesis of macroline-related alkaloids 27-31. Similarly, extension of this synthetic strategy in the ring A oxygenated series should provide easy access to the northern hemisphere 32b of the bisindoles angustricraline, alstocraline, and foliacraline (Figure 4 ).
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Affiliation(s)
- Rahul
V. Edwankar
- Department
of Chemistry & Biochemistry, University
of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Chitra R. Edwankar
- Department
of Chemistry & Biochemistry, University
of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Jeffrey R. Deschamps
- Center
for Biomolecular Science and Engineering, Naval Research Laboratory, Code 6930, Washington, District
of Columbia 20375, United States
| | - James M. Cook
- Department
of Chemistry & Biochemistry, University
of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
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5
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Geng CA, Liu XK. Five new indole alkaloids from the leaves of Rauvolfia yunnanensis. Fitoterapia 2013; 89:42-7. [DOI: 10.1016/j.fitote.2013.05.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 05/13/2013] [Accepted: 05/19/2013] [Indexed: 10/26/2022]
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Edwankar RV, Edwankar CR, Deschamps J, Cook JM. Regiospecific, enantiospecific total synthesis of C-19 methyl substituted sarpagine alkaloids dihydroperaksine-17-al and dihydroperaksine. Org Lett 2011; 13:5216-9. [PMID: 21877687 PMCID: PMC3184356 DOI: 10.1021/ol202101p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The optically active tetracyclic ketone 8 was converted into the pentacylic core 14 of the C-19 methyl substituted N(a)-H sarpagine and ajmaline alkaloids via a critical haloboration reaction. The ketone 14 was then employed in the total synthesis of 19(S),20(R)-dihydroperaksine-17-al (1) and 19(S),20(R)-dihydroperaksine (2). The key regioselective hydroboration and controlled oxidation-epimerization sequence developed in this approach should provide a general method to functionalize the C(20)-C(21) double bond in the ajmaline-related indole alkaloids.
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Affiliation(s)
- Rahul V Edwankar
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA
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Sheludko Y, Gerasimenko I, Kolshorn H, Stöckigt J. New alkaloids of the sarpagine group from Rauvolfia serpentina hairy root culture. JOURNAL OF NATURAL PRODUCTS 2002; 65:1006-1010. [PMID: 12141861 DOI: 10.1021/np0200919] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three new monoterpenoid indole alkaloids, 19(S),20(R)-dihydroperaksine (1), 19(S),20(R)-dihydroperaksine-17-al (2), and 10-hydroxy-19(S),20(R)-dihydroperaksine (3), along with 16 known alkaloids 4-19 were isolated from hairy root culture of Rauvolfia serpentina, and their structures were elucidated by 1D and 2D NMR analyses. Taking into account the stereochemistry of the new alkaloids and results of preliminary enzymatical studies, the putative biosynthetical relationships between the novel alkaloids are discussed.
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Affiliation(s)
- Yuri Sheludko
- Department of Pharmaceutical Biology, Institute of Pharmacy, Johannes Gutenberg-University, Staudinger Weg 5, D-55099 Mainz, Germany
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