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Kaiser M, Steinacher M, Lukas F, Gaertner P. Carpe diene! Europium-catalyzed [3,3] and [5,5] rearrangements of aryl-pentadienyl ethers. RSC Adv 2023; 13:32077-32082. [PMID: 37920755 PMCID: PMC10618941 DOI: 10.1039/d3ra05641d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 10/24/2023] [Indexed: 11/04/2023] Open
Abstract
A general protocol for the europium-catalyzed rearrangement of aryl-pentadienyl-ethers is described. The mode of rearrangement and product formation in this reaction was solely determined by the aryl substituent para to the phenol. If the para-position is occupied by a substituent, the substrate undergoes a [3,3] rearrangement to the ortho-position to form a prochiral branched diene. In turn, a free para-position in the starting material allows the reaction to proceed via a [5,5] rearrangement and leads to a linear conjugated diene product. The severely underdeveloped and synthetically valuable [5,5] rearrangement was investigated in terms of scope and mechanism.
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Affiliation(s)
- Maximilian Kaiser
- Institute of Applied Synthetic Chemistry, Technische Universität Wien Getreidemarkt 9/163 1060 Wien Austria
| | - Michael Steinacher
- Institute of Applied Synthetic Chemistry, Technische Universität Wien Getreidemarkt 9/163 1060 Wien Austria
| | - Florian Lukas
- Institute of Applied Synthetic Chemistry, Technische Universität Wien Getreidemarkt 9/163 1060 Wien Austria
| | - Peter Gaertner
- Institute of Applied Synthetic Chemistry, Technische Universität Wien Getreidemarkt 9/163 1060 Wien Austria
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Kaiser M, Schönbauer D, Schragl K, Weil M, Gaertner P, Enev VS. Efforts toward the Total Synthesis of Elisabethin A. J Org Chem 2022; 87:15333-15349. [PMID: 36283031 PMCID: PMC9680034 DOI: 10.1021/acs.joc.2c01914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We describe our efforts toward the total synthesis of the natural product elisabethin A. The first route was guided by the proposed biosynthesis, assembling the 6,6-ring system before forming the five-membered ring including the quaternary carbon. The second approach includes a high yielding cyclization under Mitsunobu conditions as a key step. It allowed the preparation of an unusual and highly functionalized bicyclic 6,5-spiro compound. Both routes share a common advanced precursor obtained from an "underdeveloped" Claisen rearrangement of an aryl dienyl ether.
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Affiliation(s)
- Maximilian Kaiser
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria,
| | - David Schönbauer
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Katharina Schragl
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Matthias Weil
- Institute
of Chemical Technologies and Analytics, TU Wien, Getreidemarkt
9/164, 1060Wien, Austria
| | - Peter Gaertner
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Valentin S. Enev
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria,
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Pandit RP, Kim ST, Ryu DH. Asymmetric Synthesis of Enantioenriched 2‐Aryl‐2,3‐Dihydrobenzofurans by a Lewis Acid Catalyzed Cyclopropanation/Intramolecular Rearrangement Sequence. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906954] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Seung Tae Kim
- Department of ChemistrySungkyunkwan University 300, Cheoncheon, Jangan Suwon 16419 Korea
| | - Do Hyun Ryu
- Department of ChemistrySungkyunkwan University 300, Cheoncheon, Jangan Suwon 16419 Korea
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Pandit RP, Kim ST, Ryu DH. Asymmetric Synthesis of Enantioenriched 2-Aryl-2,3-Dihydrobenzofurans by a Lewis Acid Catalyzed Cyclopropanation/Intramolecular Rearrangement Sequence. Angew Chem Int Ed Engl 2019; 58:13427-13432. [PMID: 31309680 DOI: 10.1002/anie.201906954] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Indexed: 12/14/2022]
Abstract
A cyclopropanation/intramolecular rearrangement initiated by the Michael addition of in situ generated ortho-quinone methides (o-QMs) has been developed for the enantioselective synthesis of 2-aryl-2,3-dihydrobenzofurans containing two consecutive stereogenic centers, including a quaternary carbon atom. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction proceeded in excellent yields (up to 95 %) with excellent stereoselectivity (up to >99 ee, up to >20:1 d.r.).
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Affiliation(s)
- Rameshwar Prasad Pandit
- Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea
| | - Seung Tae Kim
- Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea
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Hu Y, Kamitanaka T, Mishima Y, Dohi T, Kita Y. Brønsted Acid-Controlled [3 + 2] Coupling Reaction of Quinone Monoacetals with Alkene Nucleophiles: A Catalytic System of Perfluorinated Acids and Hydrogen Bond Donor for the Construction of Benzofurans. J Org Chem 2013; 78:5530-43. [DOI: 10.1021/jo400613z] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yinjun Hu
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577,
Japan
| | - Tohru Kamitanaka
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577,
Japan
| | - Yusuke Mishima
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577,
Japan
| | - Toshifumi Dohi
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577,
Japan
| | - Yasuyuki Kita
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577,
Japan
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Jiménez-González L, García-Muñoz S, Alvarez-Corral M, Muñoz-Dorado M, Rodríguez-García I. Silver-Catalyzed Asymmetric Synthesis of 2,3-Dihydrobenzofurans: A New Chiral Synthesis of Pterocarpans. Chemistry 2006; 12:8762-9. [PMID: 16953512 DOI: 10.1002/chem.200600332] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
2,3-Dihydrobenzofurans can be diastereoselectively prepared by condensation of aromatic aldehydes with 2,3-dihydrobenzoxasilepines under the catalysis of Ag(I) complexes, and in the presence of a source of fluoride ion. The application of this strategy by using chiral catalysts leads to a new enantioselective total synthesis of natural cis-pterocarpans and their trans isomers. Through this method, the first enantioselective total synthesis of the antifungal agent (-)-pterocarpin was achieved. In addition, a new entry into the heteroaromatic system of 2,5-dihydrobenzoxepine is also presented.
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Greuter H, Schmid H, Fráter G. Herstellung neuer polycyclischer Verbindungen durch intramolekulareDiels-Alder-Reaktionen von Cyclohexa-2,4-dien-1-on-Abkömmlingen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19770600526] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Šarčevic̀ N, Zsindely J, Schmid H. Thermische Umlagerungen von halogensubstituierten Aryl-propargyläthern. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19730560502] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Waespe HR, Heimgartner H, Schmid H, Hansen HJ, Paul H, Fischer H. Zur Photochemie von Allylaryläthern. 55. Mitteilung über Photoreaktionen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19780610137] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Koch-Pomeranz U, Schmid H, Hansen HJ. Photochemische Cyclisierung vono-,m-,P-Allylanisolen undo-Allylanilinen. 52. Mitteilung über Photoreaktionen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19770600309] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Dätwyler P, Bosshardt H, Bernhard HO, Hesse M, Johne S. Die Struktur des Spermin-Alkaloides Aphelandrin ausAphelandra squarrosaNEES. 170. Mitteilung über organische Naturstoffe. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19780610735] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Vittorelli P, Peter-Katalinić J, Mukherjee-Müller G, Hansen HJ, Schmid H. Säurekatalysierte Umlagerung von 4-Allyl-cyclohex-2-en-1-olen; Beispiele für ladungskontrollierte [3s, 4s]-Umlagerungen von cyclischen Allylkationen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19750580517] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Giezendanner H, Rosenkranz HJ, Hansen HJ, Schmid H. Zur Photochemie von 3,5-Diaryl-2-isoxazolinen. 30. Mitteilung über Photoreaktionen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19730560744] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Wang M, Wu A, Pan X, Yang H. Total synthesis of two naturally occurring bicyclo[3.2.1]octanoid neolignans. J Org Chem 2002; 67:5405-7. [PMID: 12126439 DOI: 10.1021/jo011077o] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total syntheses of the racemates of naturally occurring macrophyllin-type bicyclo[3.2.1]octanoid neolignans, kadsurenin C 3 and kadsurenin L 4, were accomplished starting from vanillin and resorcinol. The acid-catalyzed rearrangement of hydrobenzofuranoid neolignans into bicyclo[3.2.1]octanoid neolignans was used as the key step.
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Affiliation(s)
- Mingyi Wang
- Department of Chemistry, National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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Torres Y Torres JL, Rosazza JP. Microbial transformations of p-coumaric acid by Bacillus megaterium and Curvularia lunata. JOURNAL OF NATURAL PRODUCTS 2001; 64:1408-1414. [PMID: 11720522 DOI: 10.1021/np010238g] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
p-Coumaric acid (1) is an abundant phenolic natural product that exhibits both chemoprotectant and antioxidant properties. Microbial transformation screening studies showed that 1 was converted to 4-vinylphenol (4), 4-hydroxybenzoic acid (2), caffeic acid (5), protocatechuic acid (6), and other unidentified metabolites over 144 h. 4-Vinylphenol (4) and its dimer, (2R,2S)-4-(2,3-dihydro-5-hyroxy-2-benzofuranyl) phenol (11), were produced by Bacillus megaterium, and 5-[(E)-2-carboxyethenyl]-2,3-dihydro-2-(4-hydroxyphenyl)-3-benzofurancarboxylic acid (15) and 4-hydroxybenzoic acid (2) were produced by Curvularia lunata. On the basis of deuterium-labeling experiments, B. megaterium catalyzes the nonoxidative enzymatic tautomerization of 1 to a vinylogous beta-keto acid intermediate that decarboxylates to 4. The presence of peroxidase and laccase activities in C. lunata extracts suggests that these enzymes may be involved in one-electron, p-coumaric acid dimerization in this organism.
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Affiliation(s)
- J L Torres Y Torres
- Division of Medicinal and Natural Products Chemistry, and Center for Biocatalysis and Bioprocessing, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, USA
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Snider BB, Han L, Xie C. Synthesis of 2,3-Dihydrobenzofurans by Mn(OAc)3-Based Oxidative Cycloaddition of 2-Cyclohexenones with Alkenes. Synthesis of (±)-Conocarpan. J Org Chem 1997. [DOI: 10.1021/jo9708506] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Barry B. Snider
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02254-9110
| | - Luning Han
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02254-9110
| | - Chaoyu Xie
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02254-9110
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David M, Sauleau J, Sauleau A. Rearrangements de dihydro-2,3 benzo-b furannes α vinyliques en milieu acide : acces a des benzo-b furannes et 2h-benzo-b pyrannes. Tetrahedron 1988. [DOI: 10.1016/s0040-4020(01)85988-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Ramakanth S, Narayanan K, Balasubramanian K, Rajagopalan K. A novel photochemical ring contraction of 11a-methylpterocarpans. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)87493-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Kanaoka Y, San-nohe K. Photocyclization of benzofurancarboxanilides. Photorearrangement of the benzodihydrofuran system to 3--hydroxyphenylquinolones. Tetrahedron Lett 1980. [DOI: 10.1016/0040-4039(80)80209-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Jolidon S, Hansen HJ. Mechanismus der photochemischen Methanol-Addition an 2-allylierte Aniline. Helv Chim Acta 1979. [DOI: 10.1002/hlca.19790620812] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Hansen HJ. Aromatische sigmatropische Wasserstoffverschiebungen in 2-Vinyl- und 2-Allylphenolen. Helv Chim Acta 1977. [DOI: 10.1002/hlca.19770600624] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Fiasson JL, Gluchoff-Fiasson K, Steglich W. Über die Farb- und Fluoreszenzstoffe des Grünblättrigen Schwefelkopfes (Hypholoma fasciculare, Agaricales). ACTA ACUST UNITED AC 1977. [DOI: 10.1002/cber.19771100326] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Koch-Pomeranz U, Hansen HJ, Schmid H. Photochemical Cyclization of Allylated Anisole and N-Alkyl Aniline Derivatives. Preliminary communication. Helv Chim Acta 1975. [DOI: 10.1002/hlca.19750580122] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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30
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Taulomerism and Electronic Structure of Biological Pyrimidines. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 18 1975. [DOI: 10.1016/s0065-2725(08)60131-2] [Citation(s) in RCA: 152] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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31
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Cagniant P, Cagniant D. Recent Advances in the Chemistry of Benzo[b]furan and Its Derivatives. Part I: Occurrence and Synthesis. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 18 1975. [DOI: 10.1016/s0065-2725(08)60132-4] [Citation(s) in RCA: 100] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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32
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Zinkchloridkatalysierte, thermische Umlagerungen von N-Allyl in C-Allyl-aniline; ladungsinduzierte, aromatische Amino-Claisen-Umlagerungen. Helv Chim Acta 1973. [DOI: 10.1002/hlca.19730560105] [Citation(s) in RCA: 42] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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