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Shi QQ, Tang JJ, Gao JM. Picrotoxane sesquiterpenoids: chemistry, chemo- and bio-syntheses and biological activities. Nat Prod Rep 2022; 39:2096-2131. [PMID: 36106498 DOI: 10.1039/d2np00049k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: up to December 2021Picrotoxane sesquiterpenoids are a special category of natural products known to have a picrotoxane skeleton and are characterised by a highly oxidised cis-hydrindene core, lactone rings, and epoxide functionalities. Ever since the first picrotoxane was isolated from Menispermum cocculus in the early 19th century, these compounds have long attracted the attention of natural product chemists, synthetic chemists, and pharmacologists for their particular structures and powerful biological activities. This review extensively summarizes a total of 132 naturally occurring picrotoxane sesquiterpenoids, taking into account their distributions, structural classifications, chemical and bio-synthetic researches, and bioactivities. It provides a comprehensive and in-depth perspective for further investigation on picrotoxane sesquiterpenoids.
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Affiliation(s)
- Qiang-Qiang Shi
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, People's Republic of China.
| | - Jiang-Jiang Tang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, People's Republic of China.
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, People's Republic of China.
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2
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Yoshida M. Organocatalytic Asymmetric α-Allylation and Propargylation of α-Branched Aldehydes with Alkyl Halides. J Org Chem 2021; 86:10921-10927. [PMID: 34264085 DOI: 10.1021/acs.joc.1c01394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective α-allylation and -propargylation of α-branched aldehydes with alkyl halides was successfully performed using a chiral primary amino acid organocatalyst. This alkylation reaction, involving the generation of a chiral quaternary carbon stereocenter, proceeded smoothly in a mildly basic aqueous solution of potassium hydrogen carbonate to furnish α-allylated or -propargylated aldehydes in a good yield (up to 87%) and high enantioselectivity (up to 96% ee).
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Affiliation(s)
- Masanori Yoshida
- Liberal Arts and Sciences, National Institute of Technology (KOSEN), Asahikawa College Shunkodai 2 jo 2-1-6, Asahikawa, Hokkaido 071-8142, Japan
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3
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Xiao J, Peng Y, Li WDZ. Advances on the Total Synthesis of Sesquiterpenoid Alkaloid Dendrobine. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202101041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Kiyotaki K, Kayukawa T, Imayoshi A, Tsubaki K. Total Syntheses of FR-901235, Auxarthrones A-D, and Lamellicolic Anhydride. Org Lett 2020; 22:9220-9224. [PMID: 33196202 DOI: 10.1021/acs.orglett.0c03401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In our previous study, an unusual rearrangement reaction was discovered whereby dinaphthyl ketones with three hydroxy groups at restricted positions were transformed into a phenalenone ring and a benzene ring. Using the rearrangement as a key reaction, the first total syntheses of FR-901235 and auxarthrones A-D from an unstable triketone common intermediate are described. Furthermore, lamellicolic anhydride was synthesized from the triketone. This conversion is part of the putative biosynthetic pathway and was achieved experimentally for the first time.
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Affiliation(s)
- Kotaro Kiyotaki
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
| | - Takuto Kayukawa
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
| | - Ayumi Imayoshi
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
| | - Kazunori Tsubaki
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
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5
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Cao J, Thor W, Yang S, Zhang M, Bao W, Zhu L, Yang W, Cheng YK, Lee CS. Synthesis of the Tricyclic Picrotoxane Motif by an Oxidative Cascade Cyclization. Org Lett 2019; 21:4896-4899. [PMID: 31188619 DOI: 10.1021/acs.orglett.9b01806] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An oxidative cascade cyclization of β-keto esters has been developed for the construction of the tricyclic picrotoxane motif in a single step, and DFT calculations suggested a possible cationic cyclization mechanism. This cascade cyclization can be operated on a 20 g scale to obtain a 77% total yield of the tricyclic products, which in turn can be converted to versatile intermediates for further elaboration to picrotoxanes and their structurally related compounds.
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Affiliation(s)
- Jingming Cao
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Waygen Thor
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR , China
| | - Shenkun Yang
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Mengxun Zhang
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Wenli Bao
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Lizhi Zhu
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China.,Institute of Translational Medicine, Shenzhen Second People's Hospital , The First Affiliated Hospital of Shenzhen University, Health Science Centre , Shenzhen 518035 , China
| | - Wei Yang
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Yuen-Kit Cheng
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR , China
| | - Chi-Sing Lee
- State Key Laboratory of Chemical Oncogenomics , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China.,Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR , China.,Institute for Research and Continuing Edition (Shenzhen) , Hong Kong Baptist University , Industrialization Complex Building, Shenzhen Virtual University Park, Shenzhen 518000 , China
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6
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Gouse S, Reddy NR, Baskaran S. A Domino Aza-Piancatelli Rearrangement/Intramolecular Diels–Alder Reaction: Stereoselective Synthesis of Octahydro-1H-cyclopenta[cd]isoindole. Org Lett 2019; 21:3822-3827. [DOI: 10.1021/acs.orglett.9b01267] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shaik Gouse
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Narra Rajashekar Reddy
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Sundarababu Baskaran
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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7
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Guo L, Frey W, Plietker B. Catalytic Enantioselective Total Synthesis of the Picrotoxane Alkaloids (-)-Dendrobine, (-)-Mubironine B, and (-)-Dendroxine. Org Lett 2018; 20:4328-4331. [PMID: 29975054 DOI: 10.1021/acs.orglett.8b01782] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise enantioselective total synthesis of three sesquiterpenoid alkaloids-(-)-dendrobine, (-)-mubironine B, and (-)-dendroxine-is presented, which highlights the state-of-art catalytic methods, including enantioselective Diels-Alder cycloaddition, iron-catalyzed aerobic lactonization, copper-catalyzed cycloisomerization, and free-radical-initiated hydroazidation.
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Affiliation(s)
- Lei Guo
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , DE-70569 Stuttgart , Germany
| | - Wolfgang Frey
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , DE-70569 Stuttgart , Germany
| | - Bernd Plietker
- Institut für Organische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , DE-70569 Stuttgart , Germany
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8
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Williams BM, Trauner D. Azomethine Ylide Cycloaddition Approach toward Dendrobine: Synthesis of 5-Deoxymubironine C. J Org Chem 2018; 83:3061-3068. [PMID: 29490142 DOI: 10.1021/acs.joc.8b00192] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise route to the azatricyclo[6.2.1.04,11]undecane core of (-)-dendrobine and (-)-mubironine C is described wherein an unstabilized azomethine ylide cycloaddition provides the complete carbon framework of the natural products. The cyclization precursor is made in short order from ( R)-carvone through an unconventional high-pressure Ireland-Claisen reaction. Attempts to install a final hydroxyl group through an intramolecular lactonization strategy and the observation of an unexpected and highly complex enal-ene product are also reported.
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Affiliation(s)
- Benjamin M Williams
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstrasse 5-13 , 81377 München , Germany
| | - Dirk Trauner
- Department of Chemistry Ludwig-Maximilians-Universität München Butenandtstrasse 5-13 , 81377 München , Germany.,Department of Chemistry , New York University 100 Washington Square East, Room 712 New York , New York 10003 , United States
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9
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Shi H, Michaelides IN, Darses B, Jakubec P, Nguyen QNN, Paton RS, Dixon DJ. Total Synthesis of (−)-Himalensine A. J Am Chem Soc 2017; 139:17755-17758. [DOI: 10.1021/jacs.7b10956] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Heyao Shi
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Iacovos N. Michaelides
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Benjamin Darses
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Pavol Jakubec
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Quynh Nhu N. Nguyen
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Robert S. Paton
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Darren J. Dixon
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
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10
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Lee Y, Rochette EM, Kim J, Chen DYK. An Asymmetric Pathway to Dendrobine by a Transition-Metal-Catalyzed Cascade Process. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705713] [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)
- Yujin Lee
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
| | - Elise M. Rochette
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
| | - Junyong Kim
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
| | - David Y.-K. Chen
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
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11
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Lee Y, Rochette EM, Kim J, Chen DYK. An Asymmetric Pathway to Dendrobine by a Transition-Metal-Catalyzed Cascade Process. Angew Chem Int Ed Engl 2017; 56:12250-12254. [DOI: 10.1002/anie.201705713] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Yujin Lee
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
| | - Elise M. Rochette
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
| | - Junyong Kim
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
| | - David Y.-K. Chen
- Department of Chemistry; Seoul National University; Gwanak-1 Gwanak-ro, Gwanak-gu Seoul 151-742 South Korea
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12
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Shams T, Lu X, Zhu L, Zhou F. The inhibitory effects of five alkaloids on the substrate transport mediated through human organic anion and cation transporters. Xenobiotica 2017; 48:197-205. [DOI: 10.1080/00498254.2017.1282647] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tahiatul Shams
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia and
| | - Xiaoxi Lu
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia and
| | - Ling Zhu
- Save Sight Institute, The University of Sydney, Sydney, NSW, Australia
| | - Fanfan Zhou
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia and
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13
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Li MY, Tian Y, Shen L, Buettner R, Li HZ, Liu L, Yuan YC, Xiao Q, Wu J, Jove R. 3-O-methylthespesilactam, a new small-molecule anticancer pan-JAK inhibitor against A2058 human melanoma cells. Biochem Pharmacol 2013; 86:1411-8. [DOI: 10.1016/j.bcp.2013.08.065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/28/2013] [Accepted: 08/30/2013] [Indexed: 12/31/2022]
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14
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Padwa A, Flick AC. Intramolecular Diels–Alder Cycloaddition of Furans (IMDAF) for Natural Product Synthesis. ADVANCES IN HETEROCYCLIC CHEMISTRY 2013. [DOI: 10.1016/b978-0-12-408100-0.00001-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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16
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Kreis LM, Carreira EM. Total synthesis of (-)-dendrobine. Angew Chem Int Ed Engl 2012; 51:3436-9. [PMID: 22344999 DOI: 10.1002/anie.201108564] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 01/09/2012] [Indexed: 11/07/2022]
Abstract
Cascading to alkaloids: an 18-step total synthesis of (-)-dendrobine is based on a reaction cascade with a key amine group. The amine is the initiator of the cascade and provides an efficient method for installing the stereocenters at C11 and C3. The overall transformation occurs stereoselectively only when the conversion is carried out without the isolation of intermediates.
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Affiliation(s)
- Lukas M Kreis
- Laboratorium für Organische Chemie, ETH Zürich, Switzerland
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17
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Lalli C, Bouma MJ, Bonne D, Masson G, Zhu J. Exploiting the divergent reactivity of α-isocyanoacetate: multicomponent synthesis of 5-alkoxyoxazoles and related heterocycles. Chemistry 2010; 17:880-9. [PMID: 21226103 DOI: 10.1002/chem.201002098] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Indexed: 11/09/2022]
Abstract
A novel multicomponent synthesis of 5-alkoxyoxazoles, based on a new reactivity profile of α-isocyanoacetates, is described. Thus, simply heating a solution of amine, aldehyde, and α-(EWG-phenyl)-α-isocyanoacetate or α-(4-pyridyl)-α-isocyanoacetate (EWG=electron-withdrawing group) in toluene provided 5-alkoxyoxazoles in good to excellent yields. Reaction of the 5-alkoxyoxazoles with various α,β-unsaturated acyl chlorides led to the formation of epoxytetrahydropyrrolo[3,4-b]pyridin-5-ones by a domino N-acylation/Diels-Alder cycloaddition sequence. Subsequent fragmentation under basic conditions provided 6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-5-ones. A four-component synthesis of the pyridin-5-one compounds, without isolation of the 5-alkoxyoxazole, was subsequently developed.
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Affiliation(s)
- Claudia Lalli
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
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Affiliation(s)
- Edda Gössinger
- Institut für Organische Chemie der Universität Wien, Währinger Strasse 38, 1090, Vienna, Austria.
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Claeys DD, Stevens CV, Roman BI, Van De Caveye P, Waroquier M, Van Speybroeck V. Experimental and computational study of the ring opening of tricyclic oxanorbornenes to polyhydro isoindole phosphonates. Org Biomol Chem 2010; 8:3644-54. [PMID: 20544085 DOI: 10.1039/c002926b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Phosphonylated azaheterocycles are an important class of compounds with high biological potential as conformationally restricted bioisosteres of amino acids. Therefore, it is of interest to synthesize conformationally constrained amino phosphonates. We wanted to investigate possible routes via ring opening of alpha-amino phosphonates with an oxanorbornene skeleton, as these can be synthesized with high stereoselectivity. This was achieved using different Lewis acids, leading to a range of products. The reaction with TiCl(4) and FeCl(3) was modelled at a DFT level of theory to get insight in the pathways towards the corresponding products. To ease the work up, the Fe(iii) catalyst was coated on montmorillonite clay, but this accelerated aromatization after ring opening. Quenching the FeCl(3) catalyzed reaction mixture on celite caused complete aromatization.
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Affiliation(s)
- Diederica D Claeys
- Research group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
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Padwa A. A Chemistry Cascade: From Physical Organic Studies of Alkoxy Radicals to Alkaloid Synthesis. J Org Chem 2009; 74:6421-41. [DOI: 10.1021/jo901300x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta Georgia 30322
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21
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Claeys DD, Moonen K, Roman BI, Nemykin VN, Zhdankin VV, Waroquier M, Van Speybroeck V, Stevens CV. Synthesis of Tricyclic Phosphonopyrrolidines via IMDAF: Experimental and Theoretical Investigation of the Observed Stereoselectivity. J Org Chem 2008; 73:7921-7. [DOI: 10.1021/jo801138s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Diederica D. Claeys
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Kristof Moonen
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Bart I. Roman
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Victor N. Nemykin
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Viktor V. Zhdankin
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Michel Waroquier
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Veronique Van Speybroeck
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
| | - Christian V. Stevens
- Research Group SynBioC, Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium, Department of Chemistry and Biochemistry, University of Minnesota, Duluth, Minnesota 55812, and Center for Molecular Modeling, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium
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Kimura M, Horino Y, Mori M, Tamaru Y. Chameleon Reactivity of the Allene Bond of 4-Vinylidene-2-oxazolidinone: Novel Through-Space Conjugative Nucleophilic Addition of Electron-Rich Alkenes and Hetero-Nucleophiles. Chemistry 2007; 13:9686-702. [PMID: 17768719 DOI: 10.1002/chem.200700691] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The Calpha==Cbeta double bond of allene carbamates 1 serves as an electron acceptor similar to the double bond of conjugated enones by means of a through-space interaction with the N--SO2 bond; the carbamate double bond is thus subject to nucleophilic addition for a wide variety of nucleophiles, which proceeds under mild conditions by heating at 70-100 degrees C. Depending on the kind of nucleophiles, 1 displays three different reaction modes: 1) Typically enol ethers and allylsilanes promote 1,3-sulfonyl migration of 1 and undergo the inverse electron demand Diels-Alder reaction with the 1-aza-1,3-butadiene intermediates II thus formed to furnish bicyclic 2-alkoxy-5-sulfonyltetrahydropyridines 2 and 2-silylmethyl-5-sulfonyltetrahydropyridines 3, respectively, with high regio- and stereoselectivity and retention of configuration of the double bonds of these electron-rich alkenes; 2) silanes (RnSiH4-n, n=1-3) and thiols deliver the hydride and the thiolate at the Cbeta carbon and promote the 1,3-sulfonyl migration, followed by protonation of the thus-formed carbamate anion (Z)-III to provide, for example, (Z)-4 a and (Z)-4 j, respectively; 3) alcohols simply add to the Calpha==Cbeta double bond and provide (E)-6. Usually, the reaction with alcohols is accompanied by the second pathway, giving rise to, for example, (Z)-4 b in addition to (E)-6 b. Phenol engages in the third pathway and provides (E)-6 g exclusively. Heteroaromatics, such as furans and benzofurans follow the first pathway, however, in a different regioselectivity from enol ethers and allylsilanes, delivering the oxygen atom at the 3-position of 5-sulfonyltetrahydropyridines (2 g and 2 h). Indoles, on the other hand, show a dichotomy, equally enjoying the first and the third pathways and provide mixtures of (E)-7 and (E)-8, respectively.
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Affiliation(s)
- Masanari Kimura
- Graduate School of Science and Technology, Department of Applied Chemistry, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
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23
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2-Aminofurans and 3-Aminofurans. ADVANCES IN HETEROCYCLIC CHEMISTRY 2006. [DOI: 10.1016/s0065-2725(06)92001-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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24
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Fayol A, Zhu J. Multicomponent synthesis of epoxy-tetrahydronaphthyridine and structural diversification by subsequent fragmentation. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Padwa A, Ginn JD. Studies on the Synthesis of (±)-Stenine: A Combined Intramolecular [4 + 2]-Cycloaddition/Rearrangement Cascade. J Org Chem 2005; 70:5197-206. [PMID: 15960524 DOI: 10.1021/jo050515e] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Several cyclic 2-(methylthio)-5-amidofurans containing tethered unsaturation were prepared via the reaction of dimethyl(methylthio)sulfonium tetrafluoroborate (DMSTF) with beta-alkoxy-gamma-dithiane lactams. Thermolysis of these furans resulted in an intramolecular Diels-Alder reaction (IMDAF). The resulting oxa-bridge cycloadducts underwent a subsequent 1,2-methylthio shift to form tricyclic lactams in high yield. Furan 9, annealed to an azepine ring, underwent the IMDAF reaction at or below room temperature. Conformational effects imposed by the placement of a carbonyl group within the tether, combined with a rotational bias about the C(2)-N bond, enhances the rate of the IMDAF reaction of the seven-ring system so that it occurs readily at 25 degrees C. The feasibility of using the cascade sequence in the context of a total synthesis of the Stemona alkaloid (+/-)-stenine was explored. The eventual synthesis of (+/-)-stenine was carried out by an intramolecular Diels-Alder reaction of a 2-amido-5-methylthio-substituted furan containing a trans-pent-3-enoic acid methyl ester side chain in order to create the desired azepinoindole skeleton. This was followed by a series of reductions to set the syn-anti stereochemical relationship at the incipient ring fusion sites present in stenine. All six stereocenters at the azepinoindole core were derived in high stereoselectivity from the functionality present in the rearranged cycloadduct 10. Compound 10 was converted to stenine in 11 additional steps via a sequence that features a Crabtree's-catalyst directed hydrogenation, iodolactonization, and a Keck allylation.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA.
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26
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Wright DL. Furans as versatile synthons for target-oriented and diversity-oriented synthesis. PROGRESS IN HETEROCYCLIC CHEMISTRY 2005. [DOI: 10.1016/s0959-6380(05)80323-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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27
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Quai M, Frattini S, Vendrame U, Mondoni M, Dossena S, Cereda E. 5-Hydroxy-2 H -pyrrol-2-ones and not 2-aminofurans are the cycloaddition products between alkyl isocyanides and benzyliden-1,3-diketones. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.12.059] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Padwa A, Rashatasakhon P, Rose M. Triflic anhydride mediated cyclization of 5-hydroxy-substituted pyrrolidinones for the preparation of alpha-trifluoromethylsulfonamido furans. J Org Chem 2003; 68:5139-46. [PMID: 12816468 DOI: 10.1021/jo0341970] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of alpha-angelica lactone with alkylamines under aqueous conditions afforded 5-hydroxy-5-methylpyrrolidinones in high yield. When the reaction was carried out under anhydrous conditions, the only products obtained were the corresponding 4-oxopentanoic acid amides. Treatment of either class of compound with triflic anhydride (Tf(2)O) in pyridine resulted in the formation of various substituted sulfonamidofurans. The suggested mechanism involves initial formation of an iminium ion which is subsequently transformed into a transient imino triflate. Cyclization of the highly electrophilic imine onto the oxygen atom of the adjacent carbonyl group generates an imino dihydrofuran intermediate. This species reacts further with another equivalent of Tf(2)O to give the observed product. The nature of the Lewis acid used was found to affect the outcome of the cyclization reaction. In certain cases, the sulfonamide furan was utilized as a cycloaddition substrate for the synthesis of indolines and related heterocyclic systems.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
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29
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Rashatasakhon P, Padwa A. The reaction of cyclic carbinol amides with triflic anhydride as a method to prepare alpha-trifluoromethyl-sulfonamido furans. Org Lett 2003; 5:189-91. [PMID: 12529137 DOI: 10.1021/ol0272388] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
[reaction: see text] A novel synthesis of alpha-trifluoromethyl-sulfonamido furans via the reaction of cyclic carbinol amides with triflic anhydride has been developed. The reaction proceeds under very mild conditions with a wide set of representative lactams to provide the alpha-trifluoromethyl-sulfonamido-substituted furan in high yield. Rapid access to a 5-substituted indoline can be achieved by thermolysis of the N-but-3-enyl-substituted sulfonamido furan.
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30
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Tromp RA, Brussee J, van der Gen A. Stereochemistry of intramolecular Diels–Alder furan (IMDAF) reactions of furyl-substituted chiral ethanolamides. Org Biomol Chem 2003; 1:3592-9. [PMID: 14599023 DOI: 10.1039/b307275d] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes the stereoselective outcome of the intramolecular Diels-Alder furan (IMDAF) reaction of substituted (2S,3S)-ethanolamides 9-13, which were synthesised from a furyl substituted cyanohydrin. The latter was obtained from 2-furaldehyde with high enantioselectivity by an oxynitrilase catalysed addition of hydrogen cyanide. The stereochemistry of the IMDAF products was shown to be dependent on the size of the ethanolamide substituents R. Small substituents (H, Me, CN) gave exclusively exo-cycloaddition, whereas more bulky ones (Ph, Et) gave both evo- and endo-addition, the larger phenyl substituent giving a high endo-exo-ratio.
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Affiliation(s)
- Reynier A Tromp
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
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31
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Gámez-Montaño R, González-Zamora E, Potier P, Zhu J. Multicomponent domino process to oxa-bridged polyheterocycles and pyrrolopyridines, structural diversity derived from work-up procedure. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00634-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Padwa A, Brodney MA, Dimitroff M, Liu B, Wu T. Application of furanyl carbamate cycloadditions toward the synthesis of hexahydroindolinone alkaloids. J Org Chem 2001; 66:3119-28. [PMID: 11325277 DOI: 10.1021/jo010020z] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convenient synthesis of various substituted hexahydroindolinones has been achieved by an intramolecular Diels--Alder cycloaddition reaction (IMDAF) of furanyl carbamates bearing tethered alkenyl groups. The initially formed [4 + 2]-cycloadduct undergoes nitrogen-assisted ring opening followed by deprotonation of the resulting zwitterion to give the rearranged ketone. The stereochemical outcome of the IMDAF cycloaddition has the sidearm of the tethered alkenyl group oriented syn with respect to the oxygen bridge. A synthetic route to (+/-)-mesembrane and (+/-)-crinane was accomplished using this methodology. It was possible to carry out a stereoselective reduction of the initially formed hexahydroindolinone ring to produce the cis-3a-aryl-hydroindole skeleton. A related [4 + 2]-cycloaddition/rearrangement sequence was also used for a formal synthesis of the Chinese ornamental orchid (+/-)-dendrobine. The tricyclic alkaloid core was formed stereoselectivity from the thermolysis of N-[(2-methyl-2-cyclopentenyl)methyl]-N-(4-isopropyl-furan-2-yl)carbamic acid tert-butyl ester. Kende's advanced intermediate 33 was prepared in seven additional steps by standard transformations, thereby completing a formal synthesis of (+/-)-dendrobine.
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Affiliation(s)
- A Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
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33
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Cassayre J, Zard SZ. A short synthesis of (−)-dendrobine. Some observations on the nickel mediated radical cyclisation and on the Pauson–Khand reaction. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(01)00662-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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34
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Five-Membered Ring Systems Furans and Benzofurans. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0959-6380(01)80009-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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