1
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Yu L, Nakamura H. Short, Scalable Access to Pyrrovobasine. JACS AU 2023; 3:3000-3004. [PMID: 38034961 PMCID: PMC10685420 DOI: 10.1021/jacsau.3c00595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/02/2023]
Abstract
A concise gram-scale synthesis of pyrrovobasine (1) is reported. Key transformations include a three-step decagram-scale synthesis of the tetracyclic compound, Mn-mediated direct radical cyclization, and the introduction of a naturally rare pyrraline structure. The synthesis is designed to be applicable to gram-scale synthesis using inexpensive and readily available reagents.
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Affiliation(s)
- Longhui Yu
- Department of Chemistry, The
Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
| | - Hugh Nakamura
- Department of Chemistry, The
Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
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2
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Cheng WF, Ma S, Lai YT, Cheung YT, Akkarasereenon K, Zhou Y, Tong R. BiBr 3 -Mediated Intramolecular Aza-Prins Cyclization of Aza-Achmatowicz Rearrangement Products: Asymmetric Total Synthesis of Suaveoline and Sarpagine Alkaloids. Angew Chem Int Ed Engl 2023; 62:e202311671. [PMID: 37724977 DOI: 10.1002/anie.202311671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 09/21/2023]
Abstract
An intramolecular aza-Prins cyclization of aza-Achmatowicz rearrangement products was developed in which bismuth tribromide (BiBr3 ) plays a dual role as an efficient Lewis acid and source of the bromide nucleophile. This approach enables the facile construction of highly functionalized 9-azabicyclo[3.3.1]nonanes (9-ABNs), which are valuable synthetic building blocks and a powerful platform for the synthesis of a variety of alkaloid natural products and drug molecules. Suitable substrates for the aza-Prins cyclization include 1,1-disubstituted alkenes, 1,2-disubstituted alkenes, alkynes, and allenes, with good to excellent yields observed. Finally, we showcase the application of this new approach to the enantioselective total synthesis of six indole alkaloids: (-)-suaveoline (1), (-)-norsuaveoline (2), (-)-macrophylline (3), (+)-normacusine B (4), (+)-Na -methyl-16-epipericyclivine (5) and (+)-affinisine (6) in a total of 9-14 steps. This study significantly expands the synthetic utility of the aza-Achmatowicz rearrangement, and the strategy (aza-Achmatowicz/aza-Prins) is expected to be applicable to the total synthesis of other members of the big family of macroline and sarpagine indole alkaloids.
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Affiliation(s)
- Wai Fung Cheng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Shiqiang Ma
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yin Tung Lai
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yuen Tsz Cheung
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Kornkamon Akkarasereenon
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yiqin Zhou
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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3
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Rahman MT, Tiruveedhula VVNPB, Stephen MR, Rallapalli SK, Pandey KP, Cook JM. Completion of the Total Synthesis of Several Bioactive Sarpagine/Macroline Alkaloids including the Important NF-κB Inhibitor N4-Methyltalpinine. Molecules 2022; 27:1738. [PMID: 35268836 PMCID: PMC8911669 DOI: 10.3390/molecules27051738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 11/18/2022] Open
Abstract
The unification of the general synthetic strategy regarding the important and emerging group of C-19 methyl-substituted sarpagine/macroline alkaloids has culminated in the completion of the total synthesis of several bioactive alkaloids. Key transformations include an ACE-Cl mediated late-stage N(4)-demethylation and an anhydrous acid-mediated intramolecular quaternary hemiaminal formation between a tertiary amine and an aldehyde function to allow efficient access to several biologically important alkaloids from this group. Herein, the enantiospecific total synthesis of the first known sarpagine/macroline alkaloid with NF-κB inhibitory activity, N(4)-methyltalpinine (as a chloride salt), as well as the anticancer alkaloids talpinine, O-acetyltalpinine, and macrocarpines F-G, are described.
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Affiliation(s)
| | | | | | | | | | - James M. Cook
- Department of Chemistry and Biochemistry, University of Wisconsin Milwaukee, Milwaukee, WI 53211, USA; (M.T.R.); (V.V.N.P.B.T.); (M.R.S.); (S.K.R.); (K.P.P.)
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4
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Heravi MM, Abedian‐Dehaghani N, Zadsirjan V, Rangraz Y. Catalytic Function of Cu (I) and Cu (II) in Total Synthesis of Alkaloids. ChemistrySelect 2021. [DOI: 10.1002/slct.202101130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Majid M. Heravi
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Neda Abedian‐Dehaghani
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Vahideh Zadsirjan
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Yalda Rangraz
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
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5
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Banerjee A, Panda G. Total synthesis of selected bioactive alkaloids, their structure–function relationships and molecular target interactions: A comparative synthetic analysis of tryptophan originated chiral pool approaches vs other synthons. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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6
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Song X, Yang R, Xiao Q. Recent Advances in the Synthesis of Heterocyclics via Cascade Cyclization of Propargylic Alcohols. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001142] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xian‐Rong Song
- Institute of Organic Chemistry Jiangxi Science & Technology Normal University Key Laboratory of Organic Chemistry Nanchang 330013 People's Republic of China
| | - Ruchun Yang
- Institute of Organic Chemistry Jiangxi Science & Technology Normal University Key Laboratory of Organic Chemistry Nanchang 330013 People's Republic of China
| | - Qiang Xiao
- Institute of Organic Chemistry Jiangxi Science & Technology Normal University Key Laboratory of Organic Chemistry Nanchang 330013 People's Republic of China
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7
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Vonteddu NR, Solanke PR, Nayani K, Chandrasekhar S. Cation Triggered Domino Aza-Piancatelli Rearrangement/Friedel-Crafts Alkylation of Indole-Tethered Furfuyl Alcohols to Access Cycloocta[ b]indole Core of Alkaloids. Org Lett 2020; 22:8555-8560. [PMID: 33079545 DOI: 10.1021/acs.orglett.0c03155] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A domino approach to bridged cycloocta[b]indolone through a cascade of aza-Piancatelli rearrangement/Friedel-Crafts alkylation is developed. This transformation has been realized by reaction of an indole-tethered 2-furylcarbinol and substituted aniline in the presence of a Lewis acid to initiate aza-Piancatelli rearrangement followed by an in situ intramolecular Friedel-Crafts alkylation to access bridged tetracyclic frameworks in one pot.
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Affiliation(s)
- Nagarjuna Reddy Vonteddu
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.,Cipla Ltd, MIDC Patalganga, Rasayani, Maharashtra 410220, India
| | - Pooja R Solanke
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kiranmai Nayani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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8
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Dagoneau D, Wang Q, Zhu J. Towards the Sarpagine-Ajmaline-Macroline Family of Indole Alkaloids: Enantioselective Synthesis of an N-Demethyl Alstolactone Diastereomer. Chemistry 2020; 26:4866-4873. [PMID: 32065430 DOI: 10.1002/chem.202000415] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/14/2020] [Indexed: 12/19/2022]
Abstract
the strategy involving the use of functionalized tetrahydro-6H-cycloocta[b]indol-6-one is reported as a key intermediate for synthesis of members of the sarpagine-ajmaline-macroline family of monoterpene indole alkaloids. The desired tricycle was synthesized through the following key steps: 1) Evans' syn-selective aldolization; 2) Liebeskind-Srogl cross-coupling using the phenylthiol ester of 3-chloropropanoic acid as a surrogate of acrylic thioester for the synthesis of 2,3-disubstituted indoles; and 3) ring-closing metathesis (RCM) for the formation of the eight-membered ring. An N-allylation followed by intramolecular 1,4-addition was planned for synthesis of the vobasine class of natural products. However, attempted cyclizations under a diverse set of conditions involving anionic, radical, and organopalladium/organonickel species failed to produce the bridged ring system. On the other hand, esterification of the pendant primary alcohol function with acetoacetic acid, followed by intramolecular Michael addition, afforded the desired tetracycle with excellent diastereoselectivity. Subsequent functional group manipulation and transannular cyclization of the amino alcohol afforded the N(1)-demethyl-3,5-diepi-alstolactone. We believe that the same synthetic route would afford the alstolactone should the amino alcohol with appropriate stereochemistry be used as the starting material.
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Affiliation(s)
- Dylan Dagoneau
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
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9
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Trost BM, Kalnmals CA. Annulative Allylic Alkylation Reactions between Dual Electrophiles and Dual Nucleophiles: Applications in Complex Molecule Synthesis. Chemistry 2019; 26:1906-1921. [DOI: 10.1002/chem.201903961] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/29/2019] [Indexed: 01/14/2023]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305 USA
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10
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Gerlinger CKG, Gaich T. Structure‐Pattern‐Based Total Synthesis. Chemistry 2019; 25:10782-10791. [DOI: 10.1002/chem.201901308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/07/2019] [Indexed: 01/28/2023]
Affiliation(s)
- Christa K. G. Gerlinger
- Institute of Organic ChemistryUniversity of Konstanz Universitätsstrasse 10 78464 Konstanz Germany
| | - Tanja Gaich
- Institute of Organic ChemistryUniversity of Konstanz Universitätsstrasse 10 78464 Konstanz Germany
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11
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Okabe A, Harada S, Takeda T, Nishida A. One-Pot Synthesis of Cycloocta[b
]indole Through Formal [5+3] Cycloaddition Using Donor-Acceptor Cyclopropanes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900610] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Akito Okabe
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Shinji Harada
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
- Molecular Chirality Research Center; Chiba University; 1-33 Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Takuya Takeda
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
- Molecular Chirality Research Center; Chiba University; 1-33 Yayoi-cho, Inage-ku 263-8522 Chiba Japan
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12
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Wang W, Bai X, Jin S, Guo J, Zhao Y, Miao H, Zhu Y, Wang Q, Bu Z. An Unexpected FeCl3-Catalyzed Cascade Reaction of Indoles and o-Hydroxychalcones for the Assembly of Chromane-Bridged Polycyclic Indoles. Org Lett 2018; 20:3451-3454. [DOI: 10.1021/acs.orglett.8b01107] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Wenbo Wang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Xuguan Bai
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Shaojing Jin
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jiaomei Guo
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Yang Zhao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Hongjie Miao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Yanshuo Zhu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Qilin Wang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Zhanwei Bu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
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13
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M Heravi M, Zadsirjan V, Malmir M. Application of the Asymmetric Pictet-Spengler Reaction in the Total Synthesis of Natural Products and Relevant Biologically Active Compounds. Molecules 2018; 23:E943. [PMID: 29670061 PMCID: PMC6017108 DOI: 10.3390/molecules23040943] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/07/2018] [Accepted: 04/12/2018] [Indexed: 12/18/2022] Open
Abstract
Tetrahydroisoquinolines are the framework of numerous natural products predominantly alkaloids, an important and one of the most wide spread families of naturally occurring compounds in the plant kingdom. Tetrahydroisoquinolines are commonly constructed through an old reaction, the so-called Pictet−Spengler Reaction (PSR). In this reaction, a β-aryl ethylamine undergoes an acid mediated condensation with a suitable aldehyde or ketone, followed by ring closure. In this review, we aim to highlight the applications of the asymmetric variant of this old name reaction in the total synthesis of natural products, chiefly, alkaloids, which exhibit significant biological properties.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran.
| | - Vahideh Zadsirjan
- Department of Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran.
| | - Masumeh Malmir
- Department of Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran.
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14
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Stephen MR, Rahman MT, Tiruveedhula VVNPB, Fonseca GO, Deschamps JR, Cook JM. Concise Total Synthesis of (-)-Affinisine Oxindole, (+)-Isoalstonisine, (+)-Alstofoline, (-)-Macrogentine, (+)-N a -Demethylalstonisine, (-)-Alstonoxine A, and (+)-Alstonisine. Chemistry 2017; 23:15805-15819. [PMID: 28875520 PMCID: PMC6168078 DOI: 10.1002/chem.201703572] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Indexed: 11/05/2022]
Abstract
A highly enantio- and diastereoselective strategy to access any member of the sarpagine/macroline family of oxindole alkaloids via internal asymmetric induction was developed from readily available d-(+)-tryptophan. At the center of this approach was the diastereospecific generation of the spiro[pyrrolidine-3,3'-oxindole] moiety at an early stage via a tert-butyl hypochlorite-promoted oxidative rearrangement of a chiral tetrahydro-β-carboline derivative. This key branching point determined the spatial configuration at the C-7 spiro center to be entirely 7R or 7S. Other key stereospecific processes were the asymmetric Pictet-Spengler reaction and Dieckmann cyclization, which were scalable to the 600 and 150 gram levels, respectively. Execution of this approach resulted in first enantiospecific total synthesis of (+)-isoalstonisine and (-)-macrogentine from the chitosenine series (7R), as well as (+)-alstonisine, (+)-alstofoline, (-)-alstonoxine A and (+)-Na -demethylalstonisine from the alstonisine series (7S).
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Affiliation(s)
- Michael Rajesh Stephen
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - M Toufiqur Rahman
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - V V N Phani Babu Tiruveedhula
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - German O Fonseca
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
| | - Jeffrey R Deschamps
- Center for Biomolecular Science and Engineering, Naval Research Laboratory, Code 6930, Washington, DC, 20375, USA
| | - James M Cook
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
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15
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16
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Rahman MT, Deschamps JR, Imler GH, Schwabacher AW, Cook JM. Total Synthesis of Macrocarpines D and E via an Enolate-Driven Copper-Mediated Cross-Coupling Process: Replacement of Catalytic Palladium with Copper Iodide. Org Lett 2016; 18:4174-7. [PMID: 27526647 DOI: 10.1021/acs.orglett.6b01526] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An enolate driven copper-mediated cross-coupling process enabled cheaper and greener access to the key pentacyclic intermediates required for the enantiospecific total synthesis of a number of C-19 methyl substituted sarpagine/macroline indole alkaloids. Replacement of palladium (60-68%) with copper iodide (82-89%) resulted in much higher yields. The formation of an unusual 7-membered cross-coupling product was completely inhibited by using TEMPO as a radical scavenger. Further functionalization led to the first enantiospecific total synthesis of macrocarpines D and E.
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Affiliation(s)
- M Toufiqur Rahman
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee , 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
| | - Jeffrey R Deschamps
- Center for Biomolecular Science and Engineering, Naval Research Laboratory , Code 6930, Washington, DC 20375, United States
| | | | - Alan W Schwabacher
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee , 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
| | - James M Cook
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee , 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
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17
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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18
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Dai JK, Dan WJ, Li N, Du HT, Zhang JW, Wang JR. Synthesis, in vitro antibacterial activities of a series of 3- N -substituted canthin-6-ones. Bioorg Med Chem Lett 2016; 26:580-583. [DOI: 10.1016/j.bmcl.2015.11.070] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 11/02/2015] [Accepted: 11/20/2015] [Indexed: 12/17/2022]
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19
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Ponra S, Majumdar KC. Brønsted acid-promoted synthesis of common heterocycles and related bio-active and functional molecules. RSC Adv 2016. [DOI: 10.1039/c5ra27069c] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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20
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Abstract
The sarpagine-related macroline and ajmaline alkaloids share a common biosynthetic origin, and bear important structural similarities, as expected. These indole alkaloids are widely dispersed in 25 plant genera, principally in the family Apocynaceae. Very diverse and interesting biological properties have been reported for this group of natural products. Isolation of new sarpagine-related alkaloids and the asymmetric synthesis of these structurally complex molecules are of paramount importance to the synthetic and medicinal chemists. A total of 115 newly isolated sarpagine-related macroline and ajmaline alkaloids, along with their physicochemical properties have been included in this chapter. A general and efficient strategy for the synthesis of these monomeric alkaloids, as well as bisindoles, has been presented, which involves application of the asymmetric Pictet-Spengler reaction (>98% ee) as a key step because of the ease of scale up of the tetracyclic template. Also included in this chapter are the syntheses of the sarpagine-related alkaloids, published since 2000.
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Affiliation(s)
- Ojas A. Namjoshi
- RTI International, Center for Drug Design and Discovery, 3040 E. Cornwallis Road, Research Triangle Park, NC 27709, USA
| | - James M. Cook
- University of Wisconsin-Milwaukee, Chemistry Department, 3210 E. Cramer Street, Milwaukee, WI 53211, USA
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21
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Fonseca GO, Wang ZJ, Namjoshi OA, Deschamps JR, Cook JM. First stereospecific total synthesis of (−)-affinisine oxindole as well as facile entry into the C(7)-diastereomeric chitosenine stereochemistry. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Reddy GN, Rao BM, Vijay M, Devi BP, Prasad R, Reddy BS. Bioglycerol-derived carbon−SO3H as a recyclable catalyst for the synthesis of tetrahydro-β-carbolines. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A variety of aldehydes undergo smooth coupling with N-tosyltryptamine in the presence of carbon−SO3H in ethanol at 80 °C to furnish the corresponding tetrahydro-β-carbolines in excellent yields with high selectivity. The coupling of tryptamine with isatins affords the respective spiro-tetrahydro-β-carbolines in good yields. The use of a recyclable solid acid catalyst makes this method simple, convenient, and cost-effective.
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Affiliation(s)
- G. Niranjan Reddy
- Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - B. Maheshwar Rao
- Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - M. Vijay
- Center for Lipid Research, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - B.L.A. Prabhavathi Devi
- Center for Lipid Research, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - R.B.N. Prasad
- Center for Lipid Research, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - B.V. Subba Reddy
- Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
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23
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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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24
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Dhara S, Singha R, Ahmed A, Mandal H, Ghosh M, Nuree Y, Ray JK. Synthesis of α, β and γ-carbolines via Pd-mediated Csp2-H/N–H activation. RSC Adv 2014. [DOI: 10.1039/c4ra08457h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient method for the synthesis of halo-carbolines has been developed via Pd-catalysed formation of C–N bonds through Csp2-H/N–H activation of 4-methyl-N-[2-(pyridine-3-yl)phenyl] benzenesulfonamide derivatives.
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Affiliation(s)
- Shubhendu Dhara
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
| | - Raju Singha
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
| | - Atiur Ahmed
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
| | - Haridas Mandal
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
| | - Munmun Ghosh
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
| | - Yasin Nuree
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
| | - Jayanta K. Ray
- Department of Chemistry
- Indian Institution of Technology Kharagpur
- Kharagpur-721302, India
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25
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Bieliu̅nas V, Račkauskaitė D, Orentas E, Stončius S. Synthesis, Enantiomer Separation, and Absolute Configuration of 2,6-Oxygenated 9-Azabicyclo[3.3.1]nonanes. J Org Chem 2013; 78:5339-48. [DOI: 10.1021/jo400506h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vidmantas Bieliu̅nas
- Department
of Organic Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania
| | - Dovilė Račkauskaitė
- Department
of Organic Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania
| | - Edvinas Orentas
- Department
of Organic Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania
| | - Sigitas Stončius
- Department
of Organic Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania
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26
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Gataullin RR. Advances in the synthesis of cycloalka[b]indoles. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2013. [DOI: 10.1134/s1070428013020012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Wang L, Xie X, Liu Y. Facile Synthesis of Fully Substituted Dihydro-β-carbolines via Brønsted Acid Promoted Cascade Reactions of α-Indolyl Propargylic Alcohols with Nitrones. Org Lett 2012; 14:5848-51. [DOI: 10.1021/ol302695p] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lu Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| | - Xin Xie
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| | - Yuanhong Liu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
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28
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Edwankar RV, Edwankar CR, Namjoshi OA, Deschamps JR, Cook JM. Brønsted acid mediated cyclization of enaminones. Rapid and efficient access to the tetracyclic framework of the Strychnos alkaloids. JOURNAL OF NATURAL PRODUCTS 2012; 75:181-188. [PMID: 22257244 PMCID: PMC3288251 DOI: 10.1021/np200759h] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The development of an efficient diastereoselective method that permits rapid construction of the tetracyclic core 17 of the Strychnos-Aspidosperma alkaloids is described. Enaminone 16, synthesized in high yield, has been cyclized under the influence of a Brønsted acid to provide the core tetracyclic framework 17 of the Strychnos alkaloids in optically active form or alternatively to the β-ketoester tetrahydro-β-carboline (THBC) unit 18, by varying the equivalents of acid and the molar concentration. Attempts to utilize 18 to form the C₇-C₁₆ bond of the akuammiline related alkaloids represented by strictamine (22), using metal-carbenoid chemistry, are also described.
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Affiliation(s)
- Rahul V. Edwankar
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI- 53201, United States
| | - Chitra R. Edwankar
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI- 53201, United States
| | - Ojas A. Namjoshi
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI- 53201, United States
| | - Jeffrey R. Deschamps
- Centre for Bimolecular Science and Engineering, Naval Research Laboratory, Code 6930, Washington, D.C. 20375, United States
| | - James M. Cook
- Department of Chemistry & Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI- 53201, United States
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29
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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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30
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Stöckigt J, Antonchick AP, Wu F, Waldmann H. Die Pictet-Spengler-Reaktion in der Natur und der organischen Chemie. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201008071] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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31
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Stöckigt J, Antonchick AP, Wu F, Waldmann H. The Pictet-Spengler reaction in nature and in organic chemistry. Angew Chem Int Ed Engl 2011; 50:8538-64. [PMID: 21830283 DOI: 10.1002/anie.201008071] [Citation(s) in RCA: 527] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Indexed: 01/18/2023]
Abstract
Alkaloids are an important class of natural products that are widely distributed in nature and produced by a large variety of organisms. They have a wide spectrum of biological activity and for many years were used in folk medicine. These days, alkaloids also have numerous applications in medicine as therapeutic agents. The importance of these natural products in inspiring drug discovery programs is proven and, therefore, their continued synthesis is of significant interest. The condensation discovered by Pictet and Spengler is the most important method for the synthesis of alkaloid scaffolds. The power of this synthesis method has been convincingly proven in the construction of stereochemicaly and structurally complex alkaloids.
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Affiliation(s)
- Joachim Stöckigt
- Institute of Materia Medica, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.
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32
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OHTA Y. Construction of Indole- and Isoquinoline-fused Nitrogen-containing Heterocycles through Copper-catalyzed Multi-component Reaction. YAKUGAKU ZASSHI 2010; 130:925-36. [DOI: 10.1248/yakushi.130.925] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yusuke OHTA
- Graduate School of Pharmaceutical Sciences, Kyoto University
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33
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Wilk W, Nören-Müller A, Kaiser M, Waldmann H. Biology-Oriented Combined Solid- and Solution-Phase Synthesis of a Macroline-Like Compound Collection. Chemistry 2009; 15:11976-84. [DOI: 10.1002/chem.200901797] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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34
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Ohta Y, Oishi S, Fujii N, Ohno H. Facile Synthesis of 1,2,3,4-Tetrahydro-β-carbolines by One-Pot Domino Three-Component Indole Formation and Nucleophilic Cyclization. Org Lett 2009; 11:1979-82. [DOI: 10.1021/ol900460m] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yusuke Ohta
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Nobutaka Fujii
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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35
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Kumpaty HJ, Van Linn ML, Kabir MS, Försterling FH, Deschamps JR, Cook JM. Study of the cis to trans isomerization of 1-phenyl-2,3-disubstituted tetrahydro-beta-carbolines at C(1). Evidence for the carbocation-mediated mechanism. J Org Chem 2009; 74:2771-9. [PMID: 19275130 PMCID: PMC2758420 DOI: 10.1021/jo8028168] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present study was undertaken to shed light on the mechanism of the epimerization of cis-1,2,3-trisubstituted tetrahydro-beta-carbolines into the trans isomers via a potential carbocationic intermediate at C(1). In order to study the pathway involved in C(1)-N(2) bond cleavage, the electronic character of the carbon atom at C-1 was altered by substitution of electron-rich and electron-poor phenyl rings at this position. This provided direct evidence of the effects of charge at the proposed site of the carbocationic intermediate. In this regard, a diverse set of 1-(phenyl substituted)-2-benzyl-3-ethoxycarbonyl-1,2,3,4-tetrahydro-beta-carbolines has been synthesized via the Pictet-Spengler reaction by condensation of l-tryptophan derivatives with electron-poor and electron-rich aromatic aldehydes. The epimers involved in the isomerization mechanism were investigated by dynamic (1)H and (13)C NMR spectroscopic and X-ray crystallographic analyses. The kinetic studies, which involved conversion of cis diastereomers into their trans counterparts, were carried out in dilute TFA/CH(2)Cl(2). The 1-(4-methoxyphenyl) cis diastereomer epimerized at a much faster rate into the corresponding trans diastereomer than the related 1-(4-nitrophenyl) cis diastereomer epimerized. These observations provide support for the carbocationic intermediate in the C(1)-N(2) scission process. The understanding of this epimerization process is of importance when Pictet-Spengler reactions are carried out under acidic conditions during the synthesis of indole alkaloids.
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Affiliation(s)
- Hephzibah J Kumpaty
- Department of Chemistry, University of Wisconsin-Whitewater, Whitewater, Wisconsin 53190, USA
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36
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Edwankar CR, Edwankar RV, Rallapalli S, Cook JM. General Approach to the Total Synthesis of Macroline-Related Sarpagine and Ajmaline Alkaloids 1. Nat Prod Commun 2008. [DOI: 10.1177/1934578x0800301114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Described in this review is a general and efficient strategy for the synthesis of macroline-related sarpagine and ajmaline alkaloids. The tetracyclic ketone in the parent system, as well as the alkoxy substituted series served as templates for the synthesis of these complex molecules. The palladium-mediated enolate cross coupling process, regiospecific hydroboration, and Tollens reaction are some of the key transformations that have been employed for further functionalization of these templates. Synthetic routes that have been improved, in order to obtain gram quantities of these alkaloids form a part of this review.
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Affiliation(s)
- Chitra R. Edwankar
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
| | - Rahul V. Edwankar
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
| | - Sundari Rallapalli
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
| | - James M. Cook
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
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37
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Yang J, Wearing XZ, Le Quesne PW, Deschamps JR, Cook JM. Enantiospecific synthesis of (+)-alstonisine via a stereospecific osmylation process. JOURNAL OF NATURAL PRODUCTS 2008; 71:1431-1440. [PMID: 18611051 DOI: 10.1021/np800269k] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The first enantiospecific total synthesis of (+)-alstonisine has been accomplished from D-tryptophan methyl ester 13 in 12% overall yield (in 17 reaction vessels). A diastereospecific osmylation process has been employed as a key step to convert indole 18 into spirocyclic oxindole 19. Mechanistic studies of the stereoselective osmylation of the 2,3-indole double bond of indole alkaloids has been carried out. Compelling evidence for the intramolecular delivery of OsO4 via N b-complexation was obtained for the osmylation process. The correct structure of (+)-alstonisine (1) was determined by NOE spectroscopic experiments and further confirmed by single-crystal X-ray analysis.
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Affiliation(s)
- Jie Yang
- Department of Chemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA
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38
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Discovery of a New Class of Inhibitors ofMycobacterium tuberculosisProtein Tyrosine Phosphatase B by Biology-Oriented Synthesis. Angew Chem Int Ed Engl 2008; 47:5973-7. [DOI: 10.1002/anie.200801566] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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39
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Nören-Müller A, Wilk W, Saxena K, Schwalbe H, Kaiser M, Waldmann H. Entwicklung einer neuen Klasse von Inhibitoren der Proteintyrosinphosphatase-B ausMycobacterium tuberculosisdurch Biologie-orientierte Synthese (BIOS). Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801566] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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40
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Galliford CV, Scheidt KA. Pyrrolidinyl-spirooxindole natural products as inspirations for the development of potential therapeutic agents. Angew Chem Int Ed Engl 2008; 46:8748-58. [PMID: 17943924 DOI: 10.1002/anie.200701342] [Citation(s) in RCA: 2033] [Impact Index Per Article: 127.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The 3,3'-pyrrolidinyl-spirooxindole unit is a privileged heterocyclic motif that forms the core of a large family of alkaloid natural products with strong bioactivity profiles and interesting structural properties. Significant recent advances in the synthesis of this fused heterocyclic system have led to intense interest in the development of related compounds as potential medicinal agents or biological probes.
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Affiliation(s)
- Chris V Galliford
- Chemistry Department, Northwestern University, 2145 Sheridan Road, Evanston IL 60201, USA
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41
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Galliford C, Scheidt K. Natürliche Pyrrolidinylspirooxindole als Vorlagen für die Entwicklung medizinischer Wirkstoffe. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701342] [Citation(s) in RCA: 497] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Liao X, Zhou H, Yu J, Cook JM. An improved total synthesis of (+)-macroline and alstonerine as well as the formal total synthesis of (-)-talcarpine and (-)-anhydromacrosalhine-methine. J Org Chem 2007; 71:8884-90. [PMID: 17081019 DOI: 10.1021/jo061652u] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An intramolecular Pd-catalyzed alpha-vinylation process is described. This cyclization has been employed for the enantiospecific total synthesis of gram quantities of both (+)-macroline 3 and the macroline equivalent 4. This sequence is compared to the enolate-driven cross-coupling process. The intermediate 4 was also converted into (-)-alstonerine 1 via modification of an intramolecular Tsuji-Wacker oxidation. This sequence resulted in an improved total synthesis of (-)-talcarpine 5 and (-)-anhydromacrosalhine-methine 6 as well.
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Affiliation(s)
- Xuebin Liao
- Department of Chemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA
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43
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Liao X, Huang S, Zhou H, Parrish D, Cook JM. Cascade Approach toward the Core Structure of Neosarpagine. Org Lett 2007; 9:1469-71. [PMID: 17358071 DOI: 10.1021/ol070148o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A palladium-catalyzed domino sequence was developed to rapidly construct the core structure of neosarpagine and other quinuclidine-related alkaloids. The cyclization of ketone 11 to ethylidene 4 with Pd(dba)2, DPEphos, LiHMDS, and ZnCl2 in THF represents a new domino process wherein a nonstabilized enolate served as a nucleophile.
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Affiliation(s)
- Xuebin Liao
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin 53211, USA
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44
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Youn SW. THE PICTET-SPENGLER REACTION: EFFICIENT CARBON-CARBON BOND FORMING REACTION IN HETEROCYCLIC SYNTHESIS. ORG PREP PROCED INT 2006. [DOI: 10.1080/00304940609356447] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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45
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Lewis SE. Recent advances in the chemistry of macroline, sarpagine and ajmaline-related indole alkaloids. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.017] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Affiliation(s)
- Toh-Seok Kam
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
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47
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Tran YS, Kwon O. An Application of the Phosphine-Catalyzed [4 + 2] Annulation in Indole Alkaloid Synthesis: Formal Syntheses of (±)-Alstonerine and (±)-Macroline. Org Lett 2005; 7:4289-91. [PMID: 16146409 DOI: 10.1021/ol051799s] [Citation(s) in RCA: 183] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] An application of the phosphine-catalyzed [4 + 2] annulation in the formal synthesis of alstonerine and macroline is reported. A phosphine-catalyzed [4 + 2] reaction between imine 7a and allene 8 formed the D ring of the target indole alkaloids. A subsequent intramolecular Friedel-Crafts acylation provided the C ring of the bridged tetracycle. Deprotection, followed by methylation of the bridged nitrogen, deoxygenation of the C6 ketone, and reduction of the C16 carbethoxy group provided the previously known intermediate 3.
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Affiliation(s)
- Yang S Tran
- Department of Chemistry and Biochemistry, University of California, Los Angeles 607 Charles E. Young Drive East, Los Angeles, California 90095-1569, USA
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48
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Cox P, Craig D, Ioannidis S, Rahn VS. 4-(Phenylsulfonyl)-4-lithiocyclopentene as a nucleophilic 2-pentene-1,5-dial synthetic equivalent. An aziridine-based synthetic approach to (−)-alstonerine. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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49
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Cao H, Yu J, Wearing XZ, Zhang C, Liu X, Deschamps J, Cook JM. The first enantiospecific synthesis of (−)-koumidine via the intramolecular palladium-catalyzed enolate driven cross coupling reaction. The stereospecific introduction of the 19-(Z) ethylidene side chain. Tetrahedron Lett 2003. [DOI: 10.1016/j.tetlet.2003.08.072] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Yu J, Wang T, Wearing XZ, Ma J, Cook JM. Enantiospecific total synthesis of (-)-(E)16-epiaffinisine, (+)-(E)16-epinormacusine B, and (+)-dehydro-16-epiaffinisine as well as the stereocontrolled total synthesis of alkaloid G. J Org Chem 2003; 68:5852-9. [PMID: 12868917 DOI: 10.1021/jo030116o] [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: 10/27/2022]
Abstract
An efficient strategy is described for the total synthesis of the sarpagine-related indole alkaloids (-)-(E)16-epiaffinisine (1), (+)-(E)16-epinormacusine B (2), and (+)-dehydro-16-epiaffinisine (4). A key step employed the chemospecific and regiospecific hydroboration/oxidation at C(16)-C(17); this method has also resulted in the synthesis of (+)-dehydro-16-epinormacusine B (5). The oxy-anion Cope rearrangement followed by protonation of the enolate that resulted under conditions of kinetic control has been employed to generate the key asymmetric centers at C(15), C(16), and C(20) in alkaloid G (7) in a highly stereocontrolled fashion (>43:1). Conditions that favor control of the sarpagine stereochemistry at C(16) vs the epimeric ajmaline configuration at the same stereocenter have been determined. The formation of the required cyclic ether in 4, 5, and 7 was realized with complete control from the top face on treatment of the corresponding alcohols with DDQ/THF or DDQ/aq THF in excellent yields.
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Affiliation(s)
- Jianming Yu
- Department of Chemistry, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA
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