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Sim DSY, Tang SY, Low YY, Lim SH, Kam TS. Vobasine, vincamine, voaphylline, tacaman, and iboga alkaloids from Tabernaemontana corymbosa. PHYTOCHEMISTRY 2022; 203:113384. [PMID: 36007666 DOI: 10.1016/j.phytochem.2022.113384] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/12/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
Thirteen indole alkaloids comprising six vobasine/sarpagine, one vincamine, two voaphylline, two tacaman, one iboga, and one corynantheine alkaloid, were isolated from the leaf extract of Tabernaemontana corymbosa (sample from Taiping, Perak, Malaysia). The structures of these alkaloids were determined based on analysis of the spectroscopic data (NMR and MS), and in the case of vincarudine, the absolute configuration was established by ECD and X-ray diffraction analysis. Vobasidine E represents the first vobasine-type alkaloid characterized by a contracted ring C and loss of the ethylidene/ethyl side chain. A possible biogenetic pathway from a perivine precursor, which was also present in the leaf extract, is presented. Differences in the new alkaloid content between the present and previous sample of the same plant (occurring in a different location) are discussed.
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Affiliation(s)
- Dawn Su-Yin Sim
- Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia
| | - Sin-Yee Tang
- Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia
| | - Siew-Huah Lim
- Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia.
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2
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Yu Y, Bao MF, Wang Y, Zeng Y, Cai XH. Tacamine-type alkaloids from Tabernaemontana bovina together with their configuration determination. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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3
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Sim DSY, Chong KW, Nge CE, Low YY, Sim KS, Kam TS. Cytotoxic vobasine, tacaman, and corynanthe-tryptamine bisindole alkaloids from Tabernaemontana and structure revision of tronoharine. JOURNAL OF NATURAL PRODUCTS 2014; 77:2504-2512. [PMID: 25333996 DOI: 10.1021/np500589u] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Seven new indole alkaloids (1-7) comprising four vobasine, two tacaman, and one corynanthe-tryptamine bisindole alkaloid were isolated from the stem-bark extract of a Malayan Tabernaemontana. Two of the new vobasine alkaloids (1, 3), as well as 16-epivobasine (15) and 16-epivobasenal (17), showed appreciable cytotoxicity toward KB cells (IC50 ca. 5 μg/mL). The structure of the known Tabernaemontana alkaloid tronoharine (8) was revised based on newly acquired NMR data, as well as X-ray diffraction analysis.
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Affiliation(s)
- Dawn Su-Yin Sim
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
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France S, V. Patil D, A. Cavitt M. Diastereoselective Synthesis of (±)-Deethyleburnamonine Using a Catalytic Cyclopropane Ring-Opening / Friedel-Crafts Alkylation Strategy. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)87] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Li H, Boonnak N, Padwa A. N-Alkenyl Indoles as Useful Intermediates for Alkaloid Synthesis. J Org Chem 2011; 76:9488-96. [PMID: 22007631 DOI: 10.1021/jo201955c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hao Li
- Department
of Chemistry, Emory University, Atlanta,
Georgia 30322, United States
| | - Nawong Boonnak
- Department
of Chemistry, Emory University, Atlanta,
Georgia 30322, United States
| | - Albert Padwa
- Department
of Chemistry, Emory University, Atlanta,
Georgia 30322, United States
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England DB, Padwa A. General access to the vinca and tacaman alkaloids using a Rh(II)-catalyzed cyclization/cycloaddition cascade. J Org Chem 2008; 73:2792-802. [PMID: 18318547 DOI: 10.1021/jo8001003] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The total synthesis of several members of the vinca and tacaman classes of indole alkaloids has been accomplished. The central step in the synthesis consists of an intramolecular [3+2]-cycloaddition reaction of an alpha-diazo indoloamide which delivers the pentacyclic skeleton of the natural product in excellent yield. The acid lability of the oxabicyclic structure was exploited to establish the trans-D/E ring fusion of (+/-)-3H-epivincamine (3). Finally, a base induced keto-amide ring contraction was utilized to generate the E-ring of the natural product. A variation of the cascade sequence of reactions used to synthesize (+/-)-3H-epivincamine was also employed for the synthesis of the tacaman alkaloids (+/-)-tacamonine and (+/-)-apotacamine.
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Affiliation(s)
- Dylan B England
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
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Tolvanen A, Belle DD, Lounasmaa M. Aldehyde Intermediates in the Synthesis of Tacamine-Type Indole Alkaloids: Preparation of (±)-apotacamine. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19940770314] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Kam TS, Sim KM, Lim TM. Tronocarpine, a novel pentacyclic indole incorporating a seven-membered lactam moiety. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00250-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Lounasmaa M, Din Belle D, Tolvanen A. First total synthesis of 19S-hydroxytacamine, an indole alkaloid from Tabernaemontana eglandulosa, and of its C-19 stereoisomer, 19R-hydroxytacamine. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00921-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lounasmaa M, Karinen K, Din Belle D, Tolvanen A. Controlled epimerization of indolo[2,3-a]quinolizidine derivatives: An efficient total synthesis of (±)-tacamonine. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(97)10266-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Din Belle D, Tolvanen A, Lounasmaa M. Total syntheses of tacamine-type indole alkaloids of Tabernaemontana eglandulosa. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00663-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Lounasmaa M, Karinen K, Belle DD, Tolvanen A. Stereoselective synthesis of methyl 3α-ethyl-1,2,3,4,6,7,12,12bβ-octahydroindolo[2,3-a]quinolizine-1α-carboxylate: A key intermediate for the preparation of tacamine-type indole alkaloids. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00052-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lounasmaa M, Belle DD, Tolvanen A. Total Synthesis of (±)-20-epiapotacamine and its conversion into (±)-apotacamine by the Polonovski-Potier reaction. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.1995199507186] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Lounasmaa M, Din Belle D, Tolvanen A. Total synthesis of the indole alkaloid (±)-tacamine. Tetrahedron Lett 1994. [DOI: 10.1016/0040-4039(94)88102-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Chapter 1 Eburnamine—Vincamine Alkaloids. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/s0099-9598(08)60059-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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16
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Danieli B, Palmisano G. Chapter 1 Alkaloids from Tabernaemontana. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/s0099-9598(08)60307-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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17
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Van Beek TA, Verpoorte R, Svendsen AB, Leeuwenberg AJ, Bisset NG. Tabernaemontana L. (Apocynaceae): a review of its taxonomy, phytochemistry, ethnobotany and pharmacology. JOURNAL OF ETHNOPHARMACOLOGY 1984; 10:1-156. [PMID: 6371388 DOI: 10.1016/0378-8741(84)90046-1] [Citation(s) in RCA: 131] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The taxonomy, phytochemistry, ethnobotany, and pharmacology of the genus Tabernaemontana L. (Apocynaceae) is reviewed. The genus is currently being revised taxonomically; most of the segregate genera are being reunited with it and the number of species that will ultimately be recognized will probably be about 100. All the names encountered in the chemical and ethnobotanical literature have been evaluated as far as possible, and a list is presented of the recognized species and their synonyms. The biogenesis and classification of the indole alkaloids found in Tabernaemontana species is set out and some problems in the determination of their stereochemistry are discussed. To facilitate access to the information, three lists have been compiled: the alkaloids in alphabetical order; the alkaloids in order of increasing molecular weight; and the alkaloids grouped according to their biogenetic classification, together with the species and plant part(s) in which they are known to occur. Biogenetic and chemotaxonomic aspects are briefly considered. A table of the non-alkaloidal constituents is also included. The ethnobotany of individual Tabernaemontana species is outlined and an overall assessment made. Likewise, information on the pharmacology of crude extracts and individual alkaloids from Tabernaemontana species has been assembled and appraised.
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Perera P, Van Beek TA, Verpoorte R. High-performance liquid chromatography of some Tabernaemontana alkaloids. J Chromatogr A 1984. [DOI: 10.1016/s0021-9673(01)87755-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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