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Chaichompoo W, Rojsitthisak P, Pabuprapap W, Siriwattanasathien Y, Yotmanee P, Haritakun W, Suksamrarn A. Stephapierrines A-H, new tetrahydroprotoberberine and aporphine alkaloids from the tubers of Stephania pierrei Diels and their anti-cholinesterase activities. RSC Adv 2021; 11:21153-21169. [PMID: 35479350 PMCID: PMC9034021 DOI: 10.1039/d1ra03276c] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 05/18/2021] [Indexed: 11/21/2022] Open
Abstract
Eight new alkaloids, which are four new tetrahydroprotoberberine alkaloids, stephapierrines A-D (1-4), and four new aporphine alkaloids, stephapierrines E-H (5-8), together with three new naturally occurring alkaloids (9-11) and thirty-four known alkaloids (12-45) were isolated from the tubers of Stephania pierrei Diels. The structures of the new compounds were elucidated by spectroscopic analysis and physical properties. The structures of the known compounds were characterized by comparison of their spectroscopic data with those previously reported. Compound 42 exhibited the strongest acetylcholinesterase (AChE) inhibitory activity, which was more active than galanthamine, the reference drug. Compound 23 showed the highest butyrylcholinesterase (BuChE) inhibitory activity, which was also more active than galanthamine. Molecular docking studies are in good agreement with the experimental results.
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Affiliation(s)
- Waraluck Chaichompoo
- Department of Food and Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok 10330 Thailand +66-2-254-5195 +66-2-218-8310
| | - Pornchai Rojsitthisak
- Department of Food and Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Chulalongkorn University Bangkok 10330 Thailand +66-2-254-5195 +66-2-218-8310
- Natural Products for Aging and Chronic Diseases Research Unit, Chulalongkorn University Bangkok 10330 Thailand
| | - Wachirachai Pabuprapap
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University Bangkok 10240 Thailand
| | - Yuttana Siriwattanasathien
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University Bangkok 10240 Thailand
| | - Pathumwadee Yotmanee
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University Bangkok 10240 Thailand
| | - Woraphot Haritakun
- Program in Chemical Technology, Faculty of Science and Technology, Suan Dusit University Bangkok 10700 Thailand
| | - Apichart Suksamrarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ramkhamhaeng University Bangkok 10240 Thailand
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Li B, Liu R, Yang J, Luo J, Yao L, Li M, Zheng X, Jiang R, Nie H, Zhang S. Iridium-Catalyzed Asymmetric Hydrogenation of Sterically Hindered Cyclic Imines for Enantioselective Synthesis of Tetrahydroisoquinolines. Org Lett 2020; 23:140-144. [PMID: 33351639 DOI: 10.1021/acs.orglett.0c03858] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An efficient enantioselective hydrogenation of sterically hindered cyclic imines catalyzed by the Ir-tBu-ax-Josiphos complex has been described, producing a series of useful chiral bulky tetrahydroisoquinoline analogs in high isolated yields (85-96%) with good to excellent enantioselectivities (74-99% ee). This transformation provided highly straightforward access to the useful derivatives of tetrahydroisoquinolines, which are of great potential value in drug molecule and natural product research.
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Affiliation(s)
- Bin Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
| | - Ruixia Liu
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Jing Yang
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Jingyuan Luo
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Lin Yao
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Muqiong Li
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Xiaohui Zheng
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
| | - Ru Jiang
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Huifang Nie
- School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Shengyong Zhang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, The College of Life Sciences, Northwest University, Xi'an 710069, P. R. China.,School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
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Nie H, Zhu Y, Hu X, Wei Z, Yao L, Zhou G, Wang P, Jiang R, Zhang S. Josiphos-Type Binaphane Ligands for Iridium-Catalyzed Enantioselective Hydrogenation of 1-Aryl-Substituted Dihydroisoquinolines. Org Lett 2019; 21:8641-8645. [DOI: 10.1021/acs.orglett.9b03251] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Huifang Nie
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Yupu Zhu
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Xiaomu Hu
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Zhao Wei
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Lin Yao
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Gang Zhou
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Pingan Wang
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Ru Jiang
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
| | - Shengyong Zhang
- School of Pharmacy, Fourth Military Medical University, Xi’an, 710032, China
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Benmekhbi L, Louafi F, Roisnel T, Hurvois JP. Synthesis of Tetrahydroisoquinoline Alkaloids and Related Compounds through the Alkylation of Anodically Prepared α-Amino Nitriles. J Org Chem 2016; 81:6721-39. [PMID: 27410716 DOI: 10.1021/acs.joc.6b01419] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
α-Amino nitrile 2a was conveniently prepared in two individual steps from chiral hexafluorophosphate salt isoquinolinium (-)-8b including anodic cyanation as an efficient means to activate the sp(3) C1-H bond of the THIQ nucleus. The lithiation of 2a was carried out in THF at -80 °C in the presence of LDA to produce a stable α-amino carbanion which was condensed on a large variety of alkyl halides. The resulting quaternary α-amino nitriles were subjected to a stereoselective reductive decyanation in ethanol in the presence of NaBH4 as the hydride donor to yield N-Boc-1-alkyl-THIQs (+)-10a-g in up to 97:3 er's after removal of the chiral auxiliary group. Examination of the ORTEP view of THIQ (+)-1f revealed that the newly created stereogenic center had an absolute S configuration. Likewise, (-)-xylopinine was synthesized in four workup steps in an overall 63% yield from α-amino nitrile (+)-2b. In this process, crystallization of an enantioenriched mixture (90:10) of (-)-norlaudanosine with 1 equiv of (-)-N-acetyl-l-leucine afforded the leucinate salt (+)-13 (99:1 dr). Similarly, (+)-salsolidine was displaced from its (-)-DBTA salt (-)-12 in 99:1 er, which was determined by proton and carbon NMR spectroscopy in the presence of thiophosphinic acid (+)-14 as the chiral solvating agent.
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Affiliation(s)
- Lotfi Benmekhbi
- Laboratoire de Chimie des Matériaux, Faculté des Sciences Exactes, Université de Constantine 1 , route de Ain El Bey, 25000 Constantine, Algérie
| | - Fadila Louafi
- Unité de Recherche CHEMS, Faculté des Sciences Exactes, Université de Constantine 1 , route de Ain El Bey, 25000 Constantine, Algérie
| | - Thierry Roisnel
- Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, CNRS-Université de Rennes 1 , Bat. 10 B, Campus de Beaulieu, Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Jean-Pierre Hurvois
- Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1 , 2 Avenue Léon Bernard, 35043, Rennes Cedex, France
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Yang TH, Chen CM, Kuan SS. Studies on the Alkaloids ofAnona Glabra L.(I). The Isolation of (−)-N-Methylactinodaphnine. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.197100016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xie JH, Yan PC, Zhang QQ, Yuan KX, Zhou QL. Asymmetric Hydrogenation of Cyclic Imines Catalyzed by Chiral Spiro Iridium Phosphoramidite Complexes for Enantioselective Synthesis of Tetrahydroisoquinolines. ACS Catal 2012. [DOI: 10.1021/cs300069g] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian-Hua Xie
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
| | - Pu-Cha Yan
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
| | - Qian-Qian Zhang
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
| | - Ke-Xing Yuan
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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Qi-Dong Y. Asymmetric synthesis of some new tetrahydroisoquinolinium salts. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.19980160209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Werner F, Blank N, Opatz T. Synthesis of (–)-(S)-Norlaudanosine, (+)-(R)-O,O-Dimethylcoclaurine, and (+)-(R)-Salsolidine by Alkylation of an α-Aminonitrile. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700261] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Crabbé P. Recent Applications of Optical Rotatory Dispersion and Optical Circular Dichroism in Organic Chemistry. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/9780470147108.ch3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Iwao M, Fukuda T. Synthesis of Both Enantiomers of Protoberberines via Laterally Lithiated (S)-4-Isopropyl-2-(o-tolyl)oxazolines. HETEROCYCLES 2007. [DOI: 10.3987/com-07-s(w)56] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Leete E. Alkaloid biosynthesis. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 32:373-422. [PMID: 4892504 DOI: 10.1002/9780470122778.ch9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Hartenstein J, Satzinger G. Diastereoselektive Synthese des Aporphin-Alkaloids (+)-Catalin. Hydroxylierungen mit Vanadium(v)-trifluorid-oxid. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.19770891011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rüedi P, Eugster CH. Struktur von Coleon C, einem neuen Blattfarbstoff ausColeus aquaticus Gürcke. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19710540612] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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«Alkaloide» in tierischem und menschlichem Gewebe. 6. Mitteilung [1] [2]. Synthese und absolute Konfiguration chiraler 2, 3, 10, 11 - Tetrahydroxy-8-methyl-berbine [3]. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19760590818] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hardegger E, Braunschweiger H. Konfigurationsbeweis fürL-Tryptophan durch erschöpfende Ozonisierung. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19610440433] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Stadler PA, Hofmann A. Chemische Bestimmung der absoluten Konfiguration der Lysergsäure 54. Mitteilung über Mutterkornalkaloide. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19620450636] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Corrodi H, Hellerbach J, Züst A, Hardegger E, Schnider O. Hydroxy-morphinane. 12. Mitteilung. Die Konfiguration der Morphinane. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19590420119] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Rueffer M, El-Shagi H, Nagakura N, Zenk MH. (S)-norlaudanosoline synthase: The first enzyme in the benzylisoquinoline biosynthetic pathway. FEBS Lett 2001. [DOI: 10.1016/0014-5793(81)80742-9] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Suau R, Nájera F, Rico R. The Polonovski–Potier Reaction of Berbine N-Oxides. Synthesis of 8-Hydroxymethyl and 8-Methylberbines. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00945-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Czarnocki Z, Arazny Z. Pictet-Spengler Reaction of Biogenic Amines with (2R)-N-Glyoxyloylbornane-10,2-sultam. Enantioselective Synthesis of (S)-(+)-N-Methylcalycotomine and (R)-(+)-Xylopinine. HETEROCYCLES 1999. [DOI: 10.3987/com-99-8681] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Cabedo N, Protais P, Cassels BK, Cortes D. Synthesis and dopamine receptor selectivity of the benzyltetrahydroisoquinoline, (R)-(+)-nor-roefractine. JOURNAL OF NATURAL PRODUCTS 1998; 61:709-712. [PMID: 9644051 DOI: 10.1021/np980008a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
(R)-(+)-nor-Roefractine (1) was synthesized by the Bischler-Napieralski route, using asymmetric reduction of the 1, 2-didehydro precursor imine with sodium (S)-N-CBZ-prolinyloxyborohydride. Compound 1 was able to displace [3H]-raclopride (a D2 dopamine receptor-selective ligand) from its specific binding sites in rat striatum with selectivity vs [3H]-SCH23390 (D1 dopamine receptor-selective ligand).
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Affiliation(s)
- N Cabedo
- Departamento de Farmacología, Farmacognosia y Farmacodinamia, Facultad de Farmacia, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
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Comins DL, Thakker PM, Baevsky MF, Badawi MM. Chiral auxiliary mediated pictet-spengler reactions: Asymmetric syntheses of (−)-laudanosine, (+)-glaucine and (−)-xylopinine. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)01018-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kamigauchi M, Noda Y, Iwasa K, Takao N, Wiegrebe W. Chiroptical Properties of (+)-Corycavine and Corycavamine. Arch Pharm (Weinheim) 1992. [DOI: 10.1002/ardp.19923250911] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Orito K, Matsuzaki T, Suginome H. SYNTHESIS OF (±)-NOROORALYDINE AND (±)-TETRAHYDROPALMATINE. ORG PREP PROCED INT 1989. [DOI: 10.1080/00304948909356384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Emil Hardegger 1913–1978. Adv Carbohydr Chem Biochem 1981. [DOI: 10.1016/s0065-2318(08)60308-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dihydroisochinolinumlagerung, 25. Mitt. Untersuchungen der Stereochemie durch chemische Korrelation. Arch Pharm (Weinheim) 1979. [DOI: 10.1002/ardp.19793120402] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hartenstein J, Satzinger G. Diastereoselective Synthesis of the Aporphine Alkaloid (+)-Cataline. Hydroxylation with Vanadium(V) Trifluoride Oxide. ACTA ACUST UNITED AC 1977. [DOI: 10.1002/anie.197707301] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kagan HB, Langlois N, Phat Dang T. Reduction asymetrique catalysee par des complexes de metaux de transition IV. synthese d'amines chirales au moyen d'un complexe de rhodium et d'isopropylidene dihydroxy-2,3 bis(diphenylphosphino)-1,4 butane (diop). J Organomet Chem 1975. [DOI: 10.1016/s0022-328x(00)88129-2] [Citation(s) in RCA: 125] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Erhardt PA, Soine TO. Stereochemical preferences for curarimimetic neuromuscular junction blockade I: enantiomeric monoquaternary amines as probes. J Pharm Sci 1975; 64:53-62. [PMID: 124343 DOI: 10.1002/jps.2600640110] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Seven pairs of monoquaternary enantiomeric neuromuscular junction blocking agents were prepared in which the carbon asymmetry is adjacent to the quaternized nitrogen moiety. The tertiary amines from which the blocking species were obtained are carnegine, laudanosine, N-methylpavine, corydine, isocorydine, glaucine, and boldine. Curarimimetic potencies, obtained with an in vivo cat tongue-hypoglossal nerve preparation, were obtained for the enantiomeric methiodides of each of these amines. Possible contributions to activity be preferential binding to blood components or by selective inhibition of acetylcholinesterase also were studied. The combined studies indicate that there is a modest preference by the neuromuscular junction of the cat for monoquaternary blockers with the (s)-confirguation.
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Yamada SI, Konda M, Shioiri T. A biogenetic type synthesis of S(+)-laudanosine from L(-)-dopa. Tetrahedron Lett 1972. [DOI: 10.1016/s0040-4039(01)84809-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wiegrebe W, Faber L, Breyhan T. [Absolute configuration of 2 alkaloids in Cynachum vincetoxicum (L.) Pers]. ARCHIV DER PHARMAZIE UND BERICHTE DER DEUTSCHEN PHARMAZEUTISCHEN GESELLSCHAFT 1971; 304:188-94. [PMID: 5291268 DOI: 10.1002/ardp.19713040306] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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39
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Chapter 5 Papaverceae Alkaloids. ACTA ACUST UNITED AC 1970. [DOI: 10.1016/s1876-0813(08)60104-9] [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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Snatzke G, Hrbek J, Hruban L, Horeau A, Šantavý F. Absolute configuration and chiroptical properties of chelidonine and tetrahydroberberine alkaloids. Tetrahedron 1970. [DOI: 10.1016/s0040-4020(01)93153-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Chen CY, MacLean DB, Manske RH. The structure and configuration of caseamine and caseadine two novel tetrahydroprotoberberines from Corydalis caseana A. Gray. Tetrahedron Lett 1968; 3:349-53. [PMID: 5636925 DOI: 10.1016/s0040-4039(01)98759-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Stermitz FR, Teng LC. Alkaloids of the Papaveraceae. VII. The absolute configuration of romneine. (-)-reticuline from Romneya coulteri. Tetrahedron Lett 1967; 17:1601-2. [PMID: 6047191 DOI: 10.1016/s0040-4039(00)70322-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Crabbé P, Klyne W. Optical rotatory dispersion and circular dichroism or aromatic compounds: a general survey. Tetrahedron 1967. [DOI: 10.1016/s0040-4020(01)92310-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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The structure of fetidine. Chem Nat Compd 1966. [DOI: 10.1007/bf00566598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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48
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Albonico SM, Kuck AM, Deulofeu V. Isolierung und Oxydation von (+)-Tembetarin aus Fagara naranjillo. ACTA ACUST UNITED AC 1965. [DOI: 10.1002/jlac.19656850126] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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