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Liu ZK, Gao Y, Hu XQ. Recent advances in catalytic synthesis of medium-ring lactones and their derivatives. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01438b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In light of the ever-increasing significance of medium-sized lactones across the range of chemical sciences, this review summarizes the recent advances in catalytic synthesis of medium-ring lactones with emphasis on reaction scope and mechanism.
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Affiliation(s)
- Zi-Kui Liu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Yang Gao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
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2
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Affiliation(s)
- Debjani Si
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Krishna P. Kaliappan
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
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3
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Synthesis of Indole Annulated [1,3]-Thiazaheterocycles and -macrocycles via Ring-Closing Metathesis. ChemistrySelect 2016. [DOI: 10.1002/slct.201600583] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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4
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Muthusamy S, Kumar MDS. RuCl 3Promoted Efficient Synthesis of Z-Selective Macrocyclic Thiotetralactones via Ring-Closing Metathesis. ChemistrySelect 2016. [DOI: 10.1002/slct.201600350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Wan ZL, Zhang GL, Chen HJ, Wu Y, Li Y. A Chiral Pool and Cross Metathesis Based Synthesis of Gingerdiols. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301727] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Abrunhosa-Thomas I, Plas A, Kandepedu N, Chalard P, Troin Y. Efficient synthesis of β'-amino-α,β-unsaturated ketones. Beilstein J Org Chem 2013; 9:486-95. [PMID: 23504648 PMCID: PMC3596044 DOI: 10.3762/bjoc.9.52] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 02/01/2013] [Indexed: 11/23/2022] Open
Abstract
A general and simple procedure to access chiral β'-amino-α,β-enones, in seven steps, from an α,β unsaturated ester has been described. The use of a Horner-Wadsworth-Emmons reaction as a key step for generating the β'-amino-α,β-enones, permits access to a range of substrates under mild conditions and in moderate to high yield.
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Affiliation(s)
- Isabelle Abrunhosa-Thomas
- Clermont Université, ENSCCF, Institut de Chimie de Clermont-Ferrand (ICCF), BP 10448, F-63000 Clermont-Ferrand, France ; CNRS, UMR 6296, Institut de Chimie de Clermont-Ferrand (ICCF), BP 80026, F-63171 Aubière, France
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7
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Zhao W, Li Z, Sun J. A New Strategy for Efficient Synthesis of Medium and Large Ring Lactones without High Dilution or Slow Addition. J Am Chem Soc 2013; 135:4680-3. [DOI: 10.1021/ja400883q] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wanxiang Zhao
- Department of Chemistry, The Hong Kong University of Science and Technology,
Clear Water Bay, Kowloon, Hong Kong SAR, China
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055,
China
| | - Zigang Li
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055,
China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology,
Clear Water Bay, Kowloon, Hong Kong SAR, China
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8
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Zhao W, Wang Z, Sun J. Synthesis of eight-membered lactones: intermolecular [6+2] cyclization of amphoteric molecules with siloxy alkynes. Angew Chem Int Ed Engl 2012; 51:6209-13. [PMID: 22588830 DOI: 10.1002/anie.201200513] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 04/02/2012] [Indexed: 01/26/2023]
Affiliation(s)
- Wanxiang Zhao
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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9
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Zhao W, Wang Z, Sun J. Synthesis of Eight-Membered Lactones: Intermolecular [6+2] Cyclization of Amphoteric Molecules with Siloxy Alkynes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200513] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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10
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Zanato C, Pignataro L, Ambrosi A, Hao Z, Trigili C, Díaz JF, Barasoain I, Gennari C. Highly Stereoselective Total Synthesis of (+)-9-epi-Dictyostatin and (-)-12,13-Bis-epi-dictyostatin. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100244] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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López JC, Plumet J. Metathesis Reactions of Carbohydrates: Recent Highlights in Alkyne Metathesis. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001518] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- J. Cristóbal López
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Joaquín Plumet
- Universidad Complutense, Facultad de Química, Departamento de Química Orgánica, Ciudad Universitaria s/n, 28040 Madrid, Spain, Fax: +34‐91‐394‐4103
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12
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Zhu W, Jiménez M, Jung WH, Camarco DP, Balachandran R, Vogt A, Day BW, Curran DP. Streamlined syntheses of (-)-dictyostatin, 16-desmethyl-25,26-dihydrodictyostatin, and 6-epi-16-desmethyl-25,26-dihydrodictyostatin. J Am Chem Soc 2010; 132:9175-87. [PMID: 20545347 DOI: 10.1021/ja103537u] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dictyostatins are a promising class of potential anti-cancer drugs because they are powerful microtubule-stabilizing agents, but the complexity of their chemical structures is a severe impediment to their further development. On the basis of both synthetic and medicinal chemistry analyses, 16-desmethyl-25,26-dihydrodictyostatin and its C6 epimer were chosen as potentially potent yet accessible dictyostatin analogues, and three new syntheses were developed. A relatively classical synthesis involving vinyllithium addition and macrocyclization gave way to a newer and more practical approach based on esterification and ring-closing metathesis reaction. Finally, aspects of these two approaches were combined to provide a third new synthesis based on esterification and Nozaki-Hiyama-Kishi reaction. This was used to prepare the target dihydro analogues and the natural product. All of the syntheses are streamlined because of their high convergency. The work provided several new analogues of dictyostatin, including a truncated macrolactone and a C10 E-alkene, which were 400- and 50-fold less active than (-)-dictyostatin, respectively. In contrast, the targeted 16-desmethyl-25,26-dihydrodictyostatin analogues retained almost complete activity in preliminary biological assays.
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Affiliation(s)
- Wei Zhu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
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13
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Zanato C, Pignataro L, Ambrosi A, Hao Z, Gennari C. A Highly Stereoselective Total Synthesis of (+)-9-epi-Dictyostatin. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Paterson I, Britton R, Delgado O, Gardner NM, Meyer A, Naylor GJ, Poullennec KG. Total synthesis of (−)-dictyostatin, a microtubule-stabilising anticancer macrolide of marine sponge origin. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.01.083] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Yadav JS, Rajender V. Studies Directed Towards the Total Synthesis of (-)-Dictyostatin. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901448] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Fleury E, Lannou MI, Bistri O, Sautel F, Massiot G, Pancrazi A, Ardisson J. Relative Stereochemical Determination and Synthesis of the C1−C17 Fragment of a New Natural Polyketide. J Org Chem 2009; 74:7034-45. [DOI: 10.1021/jo9012833] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Etienne Fleury
- CNRS UMR 8638, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l’observatoire, 75270 Paris cedex 06, France
| | - Marie-Isabelle Lannou
- CNRS UMR 8638, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l’observatoire, 75270 Paris cedex 06, France
| | - Olivia Bistri
- CNRS UMR 8638, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l’observatoire, 75270 Paris cedex 06, France
| | - François Sautel
- CNRS/Pierre Fabre UMS 2597, Laboratoire Pierre Fabre, 3 rue des satellites, BP 94244, 31402 Toulouse cedex 4, France
| | - Georges Massiot
- CNRS/Pierre Fabre UMS 2597, Laboratoire Pierre Fabre, 3 rue des satellites, BP 94244, 31402 Toulouse cedex 4, France
| | - Ange Pancrazi
- CNRS UMR 8638, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l’observatoire, 75270 Paris cedex 06, France
| | - Janick Ardisson
- CNRS UMR 8638, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l’observatoire, 75270 Paris cedex 06, France
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17
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Dias LC, Lima DJP, Gonçalves CCS, Andricopulo AD. Synthesis of the C11-C23 Fragment of the Potent Antitumor Agent Dictyostatin. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801234] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Monti C, Sharon O, Gennari C. A highly stereoselective synthesis of the C10-C23 fragment of (-)-dictyostatin. Chem Commun (Camb) 2008:4271-3. [PMID: 18217602 DOI: 10.1039/b708820e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly stereoselective synthesis of the C10-C23 fragment of (-)-dictyostatin has been achieved using a Carreira alkynylation and a Marshall-Tamaru allenylzinc addition as key steps.
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Affiliation(s)
- Chiara Monti
- Dipartimento di Chimica Organica e Industriale, Centro di Eccellenza C.I.S.I., Università degli Studi di Milano, Via G. Venezian, 21, 20133 Milano, Italy
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22
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Dilger AK, Gopalsamuthiram V, Burke SD. A Two-Directional Approach to a (−)-Dictyostatin C11−C23 Segment: Development of a Highly Diastereoselective, Kinetically-Controlled Meerwein−Ponndorf−Verley Reduction. J Am Chem Soc 2007; 129:16273-7. [DOI: 10.1021/ja077336u] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew K. Dilger
- Contribution from the Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706-1322
| | - Vijay Gopalsamuthiram
- Contribution from the Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706-1322
| | - Steven D. Burke
- Contribution from the Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706-1322
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23
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Abstract
A convergent total synthesis of dictyostatin is described. Key features of the synthesis include the use of titanium-mediated cyclizations of (silyloxy)enynes for the synthesis of stereotriads, a subunit coupling by metathesis, and macrocyclization by intramolecular Horner-Wadsworth-Emmons olefination.
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Affiliation(s)
- Gregory W O'Neil
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA
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24
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Abstract
We have developed concise routes to a number of useful chiral 5-carbon synthetic building blocks using readily available O-1-methyl-2-deoxyribose as starting material. Novel transformations include the use of indium triflate to catalyze the oxidation of a methyl furanoside to the corresponding lactone with MCPBA and the Vasella-type fragmentation of a 5-iodo furanoside using chromium(II) chloride when zinc proved ineffective. In addition, 3,4-disubstituted piperidine derivatives were prepared without hydroxyl group protection via a simple reductive amination reaction.
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Affiliation(s)
- Dengjin Wang
- Process Research and Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
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25
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D'Annibale A, Ciaralli L, Bassetti M, Pasquini C. Synthesis of alkyl-substituted six-membered lactones through ring-closing metathesis of homoallyl acrylates. An easy route to pyran-2-ones, constituents of tobacco flavor. J Org Chem 2007; 72:6067-74. [PMID: 17629335 DOI: 10.1021/jo070600h] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ring-closing metathesis (RCM) reactions of homoallylic acrylates bearing alkyl substituents on various positions of their skeleton afford the corresponding pentenolides in the presence of carbene ruthenium catalysts. For R3 = R4 = H, or R3 = Me, R4 = H, the reactions are catalyzed by complex [RuCl2(PCy3)2(=CHPh)], while a second-generation Grubbs catalyst is required when R3 = H and R4 = Me, R3 = R4 = Me, or R3 = i-Pr and R4 = H. Alkyl substitution at the homoallylic carbon (R1, R2) increases the yield of the reaction when both the acrylic and/or homoallylic double bonds are methyl-substituted. The interaction of the catalyst with the substrate in the initiation stage involves the homoallylic double bond rather than the acrylic moiety, and the resulting alkylidene species from the first-generation Grubbs catalyst can be observed by 1H and 31P NMR. The racemic tobacco constituents 4-isopropyl-5,6-dihydropyran-2-one and 4-isopropyltetrahydropyran-2-one are prepared via a short reaction sequence, involving the RCM reaction as the key transformation.
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Affiliation(s)
- Andrea D'Annibale
- Dipartimento di Chimica, and Istituto CNR di Chimica Biomolecolare, Sezione di Roma, Università degli Studi La Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
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Shin Y, Fournier JH, Brückner A, Madiraju C, Balachandran R, Raccor BS, Edler MC, Hamel E, Sikorski RP, Vogt A, Day BW, Curran DP. Synthesis and biological evaluation of (-)-dictyostatin and stereoisomers. Tetrahedron 2007; 63:8537-8562. [PMID: 18728696 DOI: 10.1016/j.tet.2007.05.033] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Total syntheses of (-)-dictyostatin, 6,16-bis-epi-dictyostatin, 6,14,19-tris-epi-dictyostatin and a number of other isomers and analogs are reported. Three main fragments-top, middle and bottom-were first assembled and then joined by olefination or anionic addition reactions. After appending the two dienes at either end of the molecule, macrolactonization and deprotection completed the syntheses. The work proves both the relative and absolute configurations of (-)-dictyostatin. The compounds were evaluated by cell-based measurements of increased microtubule mass and antiproliferative activity, and in vitro tubulin polymerization assays as well as competitive assays with paclitaxel for its binding site on microtubules. These assays showed dictyostatin to be the most potent of the agents and further showed that the structural alterations caused from 20- to >1000-fold decreases in activity.
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Affiliation(s)
- Youseung Shin
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15261 USA
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Jung WH, Harrison C, Shin Y, Fournier JH, Balachandran R, Raccor BS, Sikorski RP, Vogt A, Curran DP, Day BW. Total synthesis and biological evaluation of C16 analogs of (-)-dictyostatin. J Med Chem 2007; 50:2951-66. [PMID: 17542572 DOI: 10.1021/jm061385k] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structure-activity relationship of the crucial C16 region of (-)-dictyostatin was established through total synthesis of analogs followed by detailed biological characterization. A versatile synthetic strategy was used to prepare milligram quantities of 16-normethyldictyostatin, 16-epi-dictyostatin, and the C16-normethyl-C15Z isomer. Along the way, a number of other E/Z isomers and epimers were prepared, and a novel lactone ring contraction to make iso-dictyostatins with 20-membered macrolactones (instead of 22-membered macrolactones) was discovered. The synthesis of 16-normethyl-15,16-dehydrodictyostatin is the first of any dictyostatin by a maximally convergent route in which three main fragments are assembled, coupled in back-to-back steps, and then processed through refunctionalization and macrolactonization. Cell-based and biochemical evaluations showed 16-normethyl-15,16-dehydrodictyostatin and 16-normethyldictyostatin to be the most potent of the new agents, only 2- and 5-fold less active than (-)-dictyostatin itself. This data and that from previously generated dictyostatin analogs are combined to produce a picture of the structure-activity relationships in this series of anticancer agents.
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Affiliation(s)
- Won-Hyuk Jung
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
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Synthesis of the C15–C23 fragment of dictyostatin using a highly stereoselective Carreira alkynylation. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.01.067] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Lim J, Lee SS, Riduan SN, Ying J. Mesocellular Foam-Supported Catalysts: Enhanced Activity and Recyclability for Ring-Closing Metathesis. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600442] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2005. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.11.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
An overview of marine natural products synthesis during 2005 is provided. In a similar vein to earlier installments in this series, the emphasis is on total syntheses of molecules of contemporary interest, new total syntheses, and syntheses that have resulted in structure confirmation or stereochemical assignments.
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Affiliation(s)
- Jonathan C Morris
- School of Chemistry and Physics, University of Adelaide, Adelaide, Australia 5005
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Natural products with taxol-like anti-tumor activity: Synthetic approaches to eleutherobin and dictyostatin. PURE APPL CHEM 2007. [DOI: 10.1351/pac200779020173] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Eleutherobin and dictyostatin are antimitotic compounds which exert their cytotoxic activity by a taxol-like mode of action, i.e., hypernucleating tubulin assembly and interfering with the dynamic instability of the cytoskeleton during mitosis. A formal total synthesis of eleutherobin was accomplished by accessing a key intermediate reported by Danishefsky and coworkers in their 1998 synthesis of the natural product. The key step of our strategy, used for obtaining the [8.4.0] fused bicyclic ring system, is a ring-closing metathesis (RCM) reaction of a densely functionalized diene under forcing conditions, using Grubbs' second-generation catalyst. Synthetic approaches to dictyostatin are also described, and in particular the preparation of the C15-C23 fragment of the macrolide, containing 5 of its 11 stereocenters.
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Parker KA, Cao H. Scalable, Catalytic Asymmetric Synthesis of Syn, Anti Stereotriad Building Blocks for Polypropionate Antibiotics. Org Lett 2006; 8:3541-4. [PMID: 16869655 DOI: 10.1021/ol0612612] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Asymmetric catalysis and chirality transfer by the 2,3-Wittig rearrangement were combined to provide a syn, anti stereotriad-containing olefinic alcohol in five steps from inexpensive starting materials. Development of this compound, a versatile intermediate for polypropionate synthesis, gave known building blocks for discodermolide.
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Affiliation(s)
- Kathlyn A Parker
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, USA.
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Bassetti M, D'Annibale A, Fanfoni A, Minissi F. Synthesis of alpha,beta-unsaturated 4,5-disubstituted gamma-lactones via ring-closing metathesis catalyzed by the first-generation Grubbs' catalyst. Org Lett 2006; 7:1805-8. [PMID: 15844911 DOI: 10.1021/ol0504087] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] 4-Methyl-5-alkyl-2(5H)-furanones have been prepared by ruthenium-catalyzed ring-closing metathesis of the suitable methallyl acrylates. Despite the electron deficiency of the conjugated double bond and of the gem-disubstitution of the allylic alkene moiety in the starting acrylates, the first-generation Grubbs' catalyst I proved to be an effective promoter for the ring closure, affording the expected butenolides in good to high yields.
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Affiliation(s)
- Mauro Bassetti
- Istituto CNR di Metodologie Chimiche, Sezione Meccanismi di Reazione, Dipartimento di Chimica, Università degli Studi "La Sapienza", P.le Aldo Moro 5, 00185 Roma, Italy.
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35
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Burlingame MA, Mendoza E, Ashley GW, Myles DC. Synthesis of discodermolide intermediates from engineered polyketides. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.12.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Fukui Y, Brückner AM, Shin Y, Balachandran R, Day BW, Curran DP. Fluorous Mixture Synthesis of (−)-Dictyostatin and Three Stereoisomers. Org Lett 2005; 8:301-4. [PMID: 16408900 DOI: 10.1021/ol0526827] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A mixture of four stereoisomers whose configurations are encoded by fluorous silyl protecting groups has been prepared and converted over 22 steps to a mixture of protected dictyostatins. Demixing by fluorous HPLC followed by removal of the fluorous protecting groups (detagging) provides dictyostatin and three C6,C7 stereoisomers. Biological evaluation showed that the monoepimers of the natural product retained highly potent activity.
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Affiliation(s)
- Yoshikazu Fukui
- Department of Chemistry, University of Pittsburgh, Pennsylvania 15260, USA
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