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Hu YH, Gan ZY, Li QT, Chen YT, Chen ME, Zhang LH, Zou JC, Zhang FM. Spokewise Total Syntheses of Four Erythrina Alkaloids and Telescoped Syntheses of Six Additional Alkaloids. J Org Chem 2024. [PMID: 39291865 DOI: 10.1021/acs.joc.4c01537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Based on rich sulfur-involving chemical transformations, a novel spokewise synthetic strategy, a subclass of the collective strategies, has been developed to concisely synthesize four erythrina alkaloids through a single-step transformation from a common synthetic precursor. Moreover, six additional erythrina alkaloids have also been synthesized by subsequent 1-2 steps chemical transformations. The current synthetic approaches provide a valuable platform for collective total syntheses of erythrina alkaloids and pseudo-natural erythrina alkaloids.
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Affiliation(s)
- Yue-Hong Hu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zhang-Yan Gan
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Qin-Tong Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yu-Ting Chen
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Meng-En Chen
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Ling-Hui Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jin-Chi Zou
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Medicinal Chemistry for Natural Resource (Ministry of Education), Yunnan University, Kunming 650091, P. R. China
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2
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Liang S, Zhou Y, Yu W. Iron-Catalyzed Denitrogenative Annulation Reactions between α-Azido Acetamides and Cyclic Ketones. Org Lett 2024; 26:613-618. [PMID: 38215045 DOI: 10.1021/acs.orglett.3c03883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
We report an FeCl2-catalyzed annulation reaction between α-azido acetamides and cyclic ketones. Two types of α,β-unsaturated γ-lactam products can be obtained, depending on the reaction conditions. When α-azido acetamides were reacted with cyclohexanone, 8-amino-5,6,7,8-tetrahydro-1H-indol-2(4H)-ones were obtained when a primary amine was present in the reaction system; conducting the reaction in the presence of 2-aminobenzenesulfonic acid, on the contrary, resulted in the formation of 5,6-dihydro-1H-indol-2(4H)-ones. Cycloheptanone and cyclooctanone reacted in the same way as cyclohexanone. The reactions proceed via the intermediacy of 2-iminoacetamides, which are formed by FeCl2-facilitated dinitrogenation of α-azido acetamides. These reactions constitute a new strategy for expanding the synthetic dimensions of organic azides.
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Affiliation(s)
- Siyu Liang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yuxin Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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3
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Mendogralo EY, Uchuskin MG. Synthesis of tetrahydrofuro[3,2- c]pyridines via Pictet-Spengler reaction. Beilstein J Org Chem 2023; 19:991-997. [PMID: 37404803 PMCID: PMC10315887 DOI: 10.3762/bjoc.19.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/20/2023] [Indexed: 07/06/2023] Open
Abstract
A semi-one-pot method for the synthesis of 4-substituted tetrahydrofuro[3,2-c]pyridines by the Pictet-Spengler reaction was developed. The method is based on the condensation of easily accessibly 2-(5-methylfuran-2-yl)ethanamine with commercially available aromatic aldehydes followed by acid-catalyzed Pictet-Spengler cyclization. Using this approach, we synthesized a range of 4-substituted tetrahydrofuro[3,2-c]pyridines in reasonable yields. The reactivity of some of the products was investigated and selected synthetic transformations of the obtained tetrahydrofuro[3,2-c]pyridines were shown.
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Affiliation(s)
- Elena Y Mendogralo
- Perm State University, Bukireva st. 15, Perm, 614990, Russian Federation
| | - Maxim G Uchuskin
- Perm State University, Bukireva st. 15, Perm, 614990, Russian Federation
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4
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Ju X, Hu X, Shi H, Ma S, He F, Wang X, Xie X, She X. Brønsted acid and Lewis acid co-promoted cascade cyclization reaction and application to the total synthesis of Erysotramidine. Org Chem Front 2021. [DOI: 10.1039/d1qo00668a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A strategy for the syntheses of pyrrolo [2,1-a] isoquinolines and indolizinoindolones via a Brønsted acid and Lewis acid co-promoted cascade reaction has been developed. The strategy was exemplified in the total synthesis of Erysotramidine.
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Affiliation(s)
- Xiaolin Ju
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaojun Hu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hongliang Shi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shiqiang Ma
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Feifei He
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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5
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Zhang RY, Jin F, Bao XG, Li HY, Xu XP, Ji SJ. Synthesis of Spiro 3,3'-Cyclopropyl Oxindoles Via N-Bromosuccinimide-Mediated Ring-Closing and Contraction Cascade. J Org Chem 2021; 86:1141-1151. [PMID: 33314930 DOI: 10.1021/acs.joc.0c02610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An N-bromosuccinimide-mediated cascade reaction involving the cyclization/oxygen-migration/ring-contraction process of 3-(β, β-diaryl) indolylethanol was disclosed. A variety of spiro 3,3'-cyclopropyl oxindole derivatives were efficiently synthesized in good yields under mild reaction conditions. A possible mechanism was suggested based on intermediate isolation and computational studies.
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Affiliation(s)
- Rui-Ying Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Feng Jin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Xiao-Guang Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Hai-Yan Li
- Analysis and Testing Center, Soochow University, Suzhou 215123, China
| | - Xiao-Ping Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
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6
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Yang H, Li W, Xu XM, Wang ZL. Tandem Reaction of Tertiary Enamides as a Synthetic Strategy to Construct the Fused N-Pentacyclic Skeleton of Erythrina Alkaloid Derivatives. Org Lett 2020; 22:8814-8818. [PMID: 33176425 DOI: 10.1021/acs.orglett.0c03162] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An exquisite protocol to the synthesis of erythrina-related structural derivatives was developed, which is composed of a nucleophilic addition of tertiary enamides to ketonic carbonyls and the trapping of acyliminium by an aromatic unit. This protocol afforded a powerful method for the construction of diverse fused N-pentacyclic skeletons in high efficiency and excellent diastereoselectivity by just using different acid catalysts.
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Affiliation(s)
- Hanlin Yang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Wenzhong Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xin-Ming Xu
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Zu-Li Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
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7
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Li Y, Zhang R, Bi X, Fu J. Multifunctionalization of Unactivated Cyclic Ketones via Synergistic Catalysis of Copper and Diarylamine: Access to Cyclic α-Enaminone. Org Lett 2018; 20:1207-1211. [PMID: 29420046 DOI: 10.1021/acs.orglett.8b00125] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A multifunctionalization of unactivated cyclic ketones via synergistic catalysis of copper and diarylamine for the direct synthesis of cyclic α-enaminone is reported for the first time. This reaction goes through oxidative α-amination, followed by a desaturation, and features mild reaction conditions, a broad substrate scope, and great functional group tolerance.
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Affiliation(s)
- Yang Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Ran Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China.,Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
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8
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Affiliation(s)
- Peng Wu
- Department
of Chemistry, Technical University of Denmark, Kongens Lyngby DK-2800, Denmark
- Department
of Immunology and Microbiology, University of Copenhagen, Copenhagen DK-2200, Denmark
- Center
for the Science of Therapeutics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, United States
- Department
of Medicine, Harvard Medical School, Boston, Massachusetts 02115, United States
- Renal
Division, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Thomas E. Nielsen
- Department
of Chemistry, Technical University of Denmark, Kongens Lyngby DK-2800, Denmark
- Department
of Immunology and Microbiology, University of Copenhagen, Copenhagen DK-2200, Denmark
- Singapore
Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
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9
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Andreev IA, Ratmanova NK, Novoselov AM, Belov DS, Seregina IF, Kurkin AV. Oxidative Dearomatization of 4,5,6,7-Tetrahydro-1H-indoles Obtained by Metal- and Solvent-Free Thermal 5-endo-digCyclization: The Route to Erythrina and Lycorine Alkaloids. Chemistry 2016; 22:7262-7. [PMID: 27076115 DOI: 10.1002/chem.201600273] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Ivan A. Andreev
- Department of Chemistry; Lomonosov Moscow State University; Leninsky Gory 1/3 119991 Moscow Russia
| | - Nina K. Ratmanova
- Department of Chemistry; Lomonosov Moscow State University; Leninsky Gory 1/3 119991 Moscow Russia
| | - Anton M. Novoselov
- Department of Chemistry; Lomonosov Moscow State University; Leninsky Gory 1/3 119991 Moscow Russia
| | - Dmitry S. Belov
- Department of Chemistry; Lomonosov Moscow State University; Leninsky Gory 1/3 119991 Moscow Russia
| | - Irina F. Seregina
- Department of Chemistry; Lomonosov Moscow State University; Leninsky Gory 1/3 119991 Moscow Russia
| | - Alexander V. Kurkin
- Department of Chemistry; Lomonosov Moscow State University; Leninsky Gory 1/3 119991 Moscow Russia
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10
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Monaco A, Aliev AE, Hilton ST. Intramolecular Acylal Cyclisation (IAC) as an Efficient Synthetic Strategy towards the Total Synthesis of Erythrina Alkaloid Derivatives. Chemistry 2015; 21:13909-12. [DOI: 10.1002/chem.201502436] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Indexed: 02/03/2023]
Affiliation(s)
- Alessandra Monaco
- UCL School of Pharmacy, University College London, 29–39 Brunswick Square, London, WC1N 1AX (UK)
| | - Abil E. Aliev
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ (UK)
| | - Stephen T. Hilton
- UCL School of Pharmacy, University College London, 29–39 Brunswick Square, London, WC1N 1AX (UK)
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11
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Paladino M, Zaifman J, Ciufolini MA. Total Synthesis of (+)-3-Demethoxyerythratidinone and (+)-Erysotramidine via the Oxidative Amidation of a Phenol. Org Lett 2015; 17:3422-5. [DOI: 10.1021/acs.orglett.5b01423] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marco Paladino
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Joshua Zaifman
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Marco A. Ciufolini
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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12
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Kalaitzakis D, Kouridaki A, Noutsias D, Montagnon T, Vassilikogiannakis G. Methylene Blue as a Photosensitizer and Redox Agent: Synthesis of 5-Hydroxy-1H-pyrrol-2(5H)-ones from Furans. Angew Chem Int Ed Engl 2015; 54:6283-7. [DOI: 10.1002/anie.201500744] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/09/2015] [Indexed: 11/11/2022]
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13
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Kalaitzakis D, Kouridaki A, Noutsias D, Montagnon T, Vassilikogiannakis G. Methylene Blue as a Photosensitizer and Redox Agent: Synthesis of 5-Hydroxy-1H-pyrrol-2(5H)-ones from Furans. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500744] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Mostowicz D, Dygas M, Kałuża Z. Heck Cyclization Strategy for Preparation of Erythrinan Alkaloids: Asymmetric Synthesis of Unnatural (−)-Erysotramidine from L-Tartaric Acid. J Org Chem 2015; 80:1957-63. [DOI: 10.1021/jo5026157] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Danuta Mostowicz
- Institute of Organic
Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Mirosław Dygas
- Institute of Organic
Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Zbigniew Kałuża
- Institute of Organic
Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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15
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Xu RQ, Gu Q, Wu WT, Zhao ZA, You SL. Construction of Erythrinane Skeleton via Pd(0)-Catalyzed Intramolecular Dearomatization of para-Aminophenols. J Am Chem Soc 2014; 136:15469-72. [DOI: 10.1021/ja508645j] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ren-Qi Xu
- State Key
Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Qing Gu
- State Key
Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Wen-Ting Wu
- State Key
Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Zhuo-An Zhao
- State Key
Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shu-Li You
- State Key
Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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16
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L’Homme C, Ménard MA, Canesi S. Synthesis of the Erythrina Alkaloid Erysotramidine. J Org Chem 2014; 79:8481-5. [DOI: 10.1021/jo501583c] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Chloé L’Homme
- Laboratoire
de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8 Québec, Canada
| | - Marc-André Ménard
- Laboratoire
de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8 Québec, Canada
| | - Sylvain Canesi
- Laboratoire
de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8 Québec, Canada
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17
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Montagnon T, Kalaitzakis D, Triantafyllakis M, Stratakis M, Vassilikogiannakis G. Furans and singlet oxygen – why there is more to come from this powerful partnership. Chem Commun (Camb) 2014; 50:15480-98. [DOI: 10.1039/c4cc02083a] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Using the reaction of furans with singlet oxygen as a means to rapidly access huge structural diversity in a green & sustainable way.
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Affiliation(s)
- Tamsyn Montagnon
- Department of Chemistry
- University of Crete
- 71003 Iraklion, Greece
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18
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Kalaitzakis D, Montagnon T, Antonatou E, Vassilikogiannakis G. One-pot Synthesis of the Tetracyclic Framework of the Aromatic Erythrina Alkaloids from Simple Furans. Org Lett 2013; 15:3714-7. [DOI: 10.1021/ol401582e] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dimitris Kalaitzakis
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
| | - Tamsyn Montagnon
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
| | - Eirini Antonatou
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece
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19
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Huang H, Ji X, Wu W, Jiang H. A cascade approach to fused indolizinones through Lewis acid–copper(i) relay catalysis. Chem Commun (Camb) 2013; 49:3351-3. [DOI: 10.1039/c3cc40643a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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20
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Shengule SR, Ryder G, Willis AC, Pyne SG. Highly diastereoselective N-acyliminium ion cyclization reactions of a tethered furan. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.10.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Moon JT, Jung JA, Ha SH, Song SH, Park SJ, Kim J, Choo DJ, Lee YS, Lee JY. Synthetic Studies onErythrinaAlkaloids: Formal Total Synthesis of (+)-3-Demethoxyerythratidinone. SYNTHETIC COMMUN 2011. [DOI: 10.1080/00397911.2010.481748] [Citation(s) in RCA: 7] [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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22
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23
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Stanislawski PC, Willis AC, Banwell MG. gem-Dihalocyclopropanes as Building Blocks in Natural-Product Synthesis: Enantioselective Total Syntheses ofent-Erythramine and 3-epi-Erythramine. Chem Asian J 2007; 2:1127-36. [PMID: 17694511 DOI: 10.1002/asia.200700155] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
ent-Erythramine ((-)-1), the enantiomer of the alkaloid erythramine, was prepared in 15 steps from known compounds. The first of three pivotal bond-forming steps in the synthesis was a Suzuki-Miyaura cross-coupling reaction of the starting materials to give a bis-silyl ether. The second involved silver(I)-induced electrocyclic ring opening of the gem-dichlorocyclopropane formed in the next step and trapping of the ensuing pi-allyl cation by the tethered nitrogen atom to give, following cleavage of the allyloxycarbonyl protecting group, an approximately 5:6 mixture of the chromatographically separable diastereoisomeric spirocyclic products. In the third critical bond-forming reaction, the iodide formed from one of the diastereoisomers underwent a radical-addition/elimination reaction sequence that led to (-)-1 in 89 % yield. The application of the same sequence of transformations to the other diastereoisomer afforded 3-epi-(+)-erythramine (3-epi-(+)-1).
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Affiliation(s)
- Pauline C Stanislawski
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
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24
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Rose MD, Cassidy MP, Rashatasakhon P, Padwa A. Acid-promoted cyclization reactions of tetrahydroindolinones. Model studies for possible application in a synthesis of selaginoidine. J Org Chem 2007; 72:538-49. [PMID: 17221972 PMCID: PMC2475590 DOI: 10.1021/jo0619783] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of various substituted bicyclic lactams by an acid-induced Pictet-Spengler reaction of tetrahydroindolinones bearing tethered heteroaromatic rings is presented. The outcome of the cyclization depends on the position of the furan tether, tether length, nature of the tethered heteroaromatic ring, and the substituent group present on the 5-position of the tethered heteroaryl group. A one-pot procedure was developed to efficiently prepare tetrahydroindolinones containing tethered furan rings. In a typical example, the reaction of furanyl azide 26 with n-Bu3P delivered iminophosphorane 27, which was allowed to react with a 1-alkyl-(2-oxocyclohexyl)acetic acid to provide the desired furanyl-substituted tetrahydroindolinone system 29. Treatment of 29 with trifluoroacetic acid afforded the tetracyclic lactam skeleton 30 found in the alkaloid (+/-)-selaginoidine.
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Affiliation(s)
- Mickea D Rose
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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Reimann E. Synthesis pathways to Erythrina alkaloids and Erythrina type compounds. FORTSCHRITTE DER CHEMIE ORGANISCHER NATURSTOFFE = PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS. PROGRES DANS LA CHIMIE DES SUBSTANCES ORGANIQUES NATURELLES 2007; 88:1-62. [PMID: 17302178 DOI: 10.1007/978-3-211-49389-2_1] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Affiliation(s)
- Eberhard Reimann
- Department of Pharmacy, Ludwig-Maximilians-Universität München, Germany.
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26
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Padwa A, Wang Q. Synthesis of the tetracyclic framework of the erythrina alkaloids using a [4 + 2]-cycloaddition/Rh(I)-catalyzed cascade of 2-imidofurans. J Org Chem 2006; 71:7391-402. [PMID: 16958534 PMCID: PMC2494947 DOI: 10.1021/jo061269p] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several 2-imido substituted furans were found to undergo a rapid intramolecular [4 + 2]-cycloaddition to deliver oxabicyclo adducts in good to excellent yields. By using a Rh(I)-catalyzed ring opening of the resulting oxabicyclic adduct, it was possible to prepare several highly functionalized tetrahydro-1H-indol-2(3H)-one derivatives which were then used to prepare several erythrina alkaloids. By taking advantage of the Rh(I)-catalyzed reaction, it was possible to convert tert-butyl 3-oxo-5-carbomethoxy-10-oxa-2-azatricyclo[5.2.1.0(1,5)]dec-8-ene-2-carboxylate into the ring opened boronate by reaction with phenylboronic acid. Treatment of the boronate with pinacol/acetic acid afforded the corresponding diol which was used in a successful synthesis of racemic 3-demethoxyerythratidinone. During the course of these studies, several novel rearrangement reactions were encountered while attempting to induce an acid-initiated Pictet Spengler cyclization of a key lactam intermediate. The IMDAF/Rh(I)-catalyzed ring opening cascade sequence was also applied to the total synthesis of (+/-)-erysotramidine as well as the lycorine type alkaloid (+/-)-epi-zephyranthine.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322,
| | - Qiu Wang
- Department of Chemistry, Emory University, Atlanta, Georgia 30322,
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27
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Ganguly A, Wang C, Biswas D, Misiaszek J, Micula A. Synthesis of novel heterocycles based on the structures of erythrina alkaloids. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.05.177] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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28
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Gao S, Tu YQ, Hu X, Wang S, Hua R, Jiang Y, Zhao Y, Fan X, Zhang S. General and Efficient Strategy for Erythrinan and Homoerythrinan Alkaloids: Syntheses of (±)-3-Demethoxyerythratidinone and (±)-Erysotramidine. Org Lett 2006; 8:2373-6. [PMID: 16706529 DOI: 10.1021/ol0607185] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A general and efficient strategy to both aromatic-type and nonaromatic-type erythrinan and homoerythrinan alkaloids has been developed. This approach involves a key two-step sequence, an alkylation of a ketone with various N-substituted iodoacetamides followed by a N-acyliminium ion promoted intramolecular cyclization, and represents one of the shortest routes to erythrinan and homoerythrinan alkaloids. As the application, the formal total synthesis of (+/-)-3-demethoxyerythratidinone and the total synthesis of (+/-)-erysotramidine have been achieved, respectively.
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Affiliation(s)
- Shuanhu Gao
- State Key Laboratory of Applied Organic Chemistry & Department of Chemistry, Lanzhou University, PRC
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29
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Fukumoto H, Takahashi K, Ishihara J, Hatakeyama S. Total Synthesis of (+)-β-Erythroidine. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600210] [Citation(s) in RCA: 6] [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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30
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Fukumoto H, Takahashi K, Ishihara J, Hatakeyama S. Total Synthesis of (+)-β-Erythroidine. Angew Chem Int Ed Engl 2006; 45:2731-4. [PMID: 16550620 DOI: 10.1002/anie.200600210] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hironori Fukumoto
- Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8521, Japan
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31
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Stanislawski PC, Willis AC, Banwell MG. New Protocols for the Assembly of the Tetracyclic Framework Associated with the Aromatic Erythrina Alkaloids. Org Lett 2006; 8:2143-6. [PMID: 16671802 DOI: 10.1021/ol060642c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Treatment of the anion derived from the ring-fused gem-dichlorocyclopropane 4c with silver tetrafluoroborate afforded the spirocyclic compound 17 in 74% yield. Product 17 was readily converted, over three steps, into the beta-iodoethyl derivative 20 and treatment of this latter compound with n-Bu(3)SnH then afforded, in 93% yield and via a radical addition/elimination sequence, compound 2 incorporating the ABCD framework of the aromatic erythrina alkaloids.
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Affiliation(s)
- Pauline C Stanislawski
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra
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Cassidy MP, Ozdemir AD, Padwa A. An Aza-Wittig/π-Furan Cyclization Approach Toward the Homoerythrina Alkaloid (±)-Selaginoidine. Org Lett 2005; 7:1339-42. [PMID: 15787501 DOI: 10.1021/ol0501323] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A one-pot procedure was developed to efficiently prepare hexahydroindolinones containing a tethered furan ring. Reaction of a furanyl azide with Bu3P delivered the iminophosphorane, which was allowed to react with 1-methyl-(2-oxocyclohexyl)acetic acid to give the desired hexahydroindolinone ring system. Further treatment with trifluoroacetic acid afforded the tetracyclic lactam skeleton found in the alkaloid (+/-)-selaginoidine.
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Affiliation(s)
- Michael P Cassidy
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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Padwa A, Lee HI, Rashatasakhon P, Rose M. Electrophilic-Induced Cyclization Reaction of Hexahydroindolinone Derivatives and Its Application toward the Synthesis of (±)-Erysotramidine. J Org Chem 2004; 69:8209-18. [PMID: 15549789 DOI: 10.1021/jo048647f] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient synthesis of variously substituted octahydroindolo[7a,1a]-isoquinolinones has been achieved by an acid-induced cyclization of hexahydroindolinones bearing tethered phenethyl groups. The formation of a single lactam diastereomer is the result of the stereoelectronic preference for axial attack by the aromatic ring onto the initially formed N-acyliminium ion from the least hindered side. Additional experiments showed that a variety of hexahydroindolinones containing tethered pi-bonds undergo a related acid-induced cyclization reaction. Treatment of the 3-methylbut-3-enyl-substituted hexahydroindolinone with acid furnished a 3:1 mixture of isomeric octahydropyrido[2,1-i]indolinones in near-quantitative yield. Interestingly, cyclization of the closely related 1-(3-methoxybut-3-enyl)-substituted hexahydroindolin-one afforded a pyrrolo[3,2,1-ij]quinolinone as the exclusive product. With this system, initial protonation takes place on the more nucleophilic enol ether pi-bond and the resulting carbonium ion undergoes a subsequent cyclization with the enamido pi-bond to give the observed product. The electrophilic promoted cyclizations were extended to include the related hexahydro[1]pyrindinone and 1H-quinolinone systems. An NBS-promoted intramolecular electrophilic aromatic substitution reaction of 1-[2-(3,4-dimethoxyphenyl)ethyl]-1,4,5,6-tetrahydroindolinone was used to assemble the tetracyclic core of the erythrinone skeleton. The resulting cyclized product was transformed into (+/-)-erysotramidine in three additional steps.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
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