1
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Sugai T, Okuyama Y, Shin J, Usui S, Hisada S, Osanai R, Oishi T, Sato T, Chida N. Synthesis of Kaitocephalin Facilitated by Three Stereoselective Allylic Transposition Reactions. CHEM LETT 2018. [DOI: 10.1246/cl.171226] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomoya Sugai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Yuya Okuyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Jaehyun Shin
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Shunme Usui
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Shoko Hisada
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Ryosuke Osanai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Takeshi Oishi
- School of Medicine, Keio University, 4-1-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8521, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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2
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El Assal M, Peixoto PA, Coffinier R, Garnier T, Deffieux D, Miqueu K, Sotiropoulos JM, Pouységu L, Quideau S. Synthesis of Scyphostatin Analogues through Hypervalent Iodine-Mediated Phenol Dearomatization. J Org Chem 2017; 82:11816-11828. [DOI: 10.1021/acs.joc.7b02366] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mourad El Assal
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
| | - Philippe A. Peixoto
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
| | - Romain Coffinier
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
| | - Tony Garnier
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
| | - Denis Deffieux
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
| | - Karinne Miqueu
- CNRS/UNIV PAU & PAYS ADOUR, Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM, UMR 5254), Hélioparc, 2 avenue du Président Angot, 64053 Pau Cedex 09, France
| | - Jean-Marc Sotiropoulos
- CNRS/UNIV PAU & PAYS ADOUR, Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM, UMR 5254), Hélioparc, 2 avenue du Président Angot, 64053 Pau Cedex 09, France
| | - Laurent Pouységu
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
| | - Stéphane Quideau
- Univ. Bordeaux, ISM (CNRS−UMR
5255), 351 cours de la
Libération, 33405 Talence Cedex, France
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3
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Kuwata K, Suzuki M, Inami Y, Hanaya K, Sugai T, Shoji M. Stereoselective synthesis of scyphostatin hydrophilic moiety. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Total Synthesis of Diterpenoid Pyrones, Nalanthalide, Sesquicillin, Candelalides A–C, and Subglutinols A, B. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63430-6.00001-1] [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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5
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Oda M, Imagawa H, Kato R, Yabiku K, Yoshikawa T, Takemoto T, Takahashi H, Yamamoto H, Nishizawa M, Sakurai J, Nagahama M. Novel inhibitor of bacterial sphingomyelinase, SMY-540, developed based on three-dimensional structure analysis. J Enzyme Inhib Med Chem 2013; 29:303-10. [DOI: 10.3109/14756366.2013.777717] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Hiroshi Imagawa
- Department of Chemistry of Functional Molecules, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Yamashiro-cho, TokushimaJapan
| | | | | | - Tomomi Yoshikawa
- Department of Chemistry of Functional Molecules, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Yamashiro-cho, TokushimaJapan
| | - Takayuki Takemoto
- Department of Chemistry of Functional Molecules, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Yamashiro-cho, TokushimaJapan
| | - Hironobu Takahashi
- Institute of Pharmacognosy, Tokushima Bunri University
Yamashiro-cho, TokushimaJapan
| | - Hirofumi Yamamoto
- Department of Chemistry of Functional Molecules, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Yamashiro-cho, TokushimaJapan
| | - Mugio Nishizawa
- Department of Chemistry of Functional Molecules, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Yamashiro-cho, TokushimaJapan
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6
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Mehta G, Modugu NR. Concise Approach to the Carbocyclic Core of the Naturally Occurring Sphingomyelinase Inhibitor Scyphostatin. J Org Chem 2013; 78:3367-73. [DOI: 10.1021/jo3028196] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Nagi Reddy Modugu
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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7
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Katoh T. Total Synthesis of Decahydrobenzo[d]xanthene Sesquiterpenoids Aureol, Strongylin A, and Stachyflin: Development of a New Strategy for the Construction of a Common Tetracyclic Core Structure. HETEROCYCLES 2013. [DOI: 10.3987/rev-13-779] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Fraser CJ, Howell GP, Harrity JPA. A furan Diels–Alder cycloaddition approach to scyphostatin analogues. Org Biomol Chem 2012; 10:9058-66. [DOI: 10.1039/c2ob26793d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Xu S, Lee CT, Rao H, Negishi EI. Highly(≥98%) Stereo- and Regioselective Trisubstituted Alkene Synthesis of Wide Applicability via 1-Halo-1-alkyne Hydroboration-Tandem Negishi-Suzuki Coupling or Organoborate Migratory Insertion Protocol. Adv Synth Catal 2011; 353:2981-2987. [PMID: 24072993 DOI: 10.1002/adsc.201100420] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
(Z)-1-Halo-1-alkenylboranes (7), preparable in 82-90% yields as ≥98% isomerically pure compounds via hydroboration of 1-halo-1-alkynes, have been converted to a wide range of trisubstituted alkenes via three different routes in the tail-to-head (T-to-H) direction, i.e., (i) Palladium-catalyzed Negishi-Suzuki tandem alkenylation, (ii) treatment of 7 with organolithium or Grignard reagents to generate α-bromo-1-alkenylboronate complexes (10) that can undergo migratory insertion of a carbon group (R2) to form (E)-alkenylboranes (11) with inversion of alkene configuration (≥98% inversion), followed by fluoride-promoted Suzuki alkenylation, and (iii) Negishi coupling to generate (Z)-alkenylboranes (8) in ≥98% retention of configuration, followed by treatment with organolithium or Grignard reagents to produce trisubstituted alkenes with reversed stereo configurations. The synthetic utility of the present methodology has been demonstrated in the highly selective synthesis of side chain (4) of scyphostatin in 28% yield over nine steps in the longest linear sequence from allyl alcohol. Thus, this new tandem protocol has been emerged as the most widely applicable and highly selective route to trisubstituted alkenes including those that are otherwise difficult to prepare.
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Affiliation(s)
- Shiqing Xu
- Herbert C. Brown Laboratories of Chemistry, Purdue University, 560 Oval Dr., West Lafayette, IN 47907-2084, USA, ;
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10
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Li Y, Meng Y, Meng X, Li Z. Stereoselective synthesis of polyoxygenated linear diaza-triquinanes via intramolecular 1,3-dipolar cycloaddition of sugar-derived hex-5-enals. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Jana R, Pathak TP, Sigman MS. Advances in transition metal (Pd, Ni, Fe)-catalyzed cross-coupling reactions using alkyl-organometallics as reaction partners. Chem Rev 2011; 111:1417-92. [PMID: 21319862 PMCID: PMC3075866 DOI: 10.1021/cr100327p] [Citation(s) in RCA: 1675] [Impact Index Per Article: 128.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ranjan Jana
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
| | - Tejas P. Pathak
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
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12
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Cha JY, Burnett GL, Huang Y, Davidson JB, Pettus TRR. A strategy for the late-stage divergent syntheses of scyphostatin analogues. J Org Chem 2011; 76:1361-71. [PMID: 21250721 PMCID: PMC3071563 DOI: 10.1021/jo102327e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This account details the synthesis of two scyphostatin analogues exhibiting a reactive polar epoxycyclohexenone core and various amide side chains outfitted for late-stage chemical derivatization into the desirable lipophilic tails. Our efforts highlight a key ipso-dearomatization process and provide new insights regarding the incompatibility and orthogonal reactivity of scyphostatin's functional groups. We further showcase the utility of resorcinol derived 2,5-cyclohexadienones as synthetic platforms capable of participating in selective chemical reactivity, and we further demonstrate their potential for rapid elaboration into complex structural motifs.
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Affiliation(s)
- Jacob Y. Cha
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - G. Leslie Burnett
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Yaodong Huang
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | | | - Thomas R. R. Pettus
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106, United States
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13
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Bartoli A, Rodier F, Commeiras L, Parrain JL, Chouraqui G. Construction of spirolactones with concomitant formation of the fused quaternary centre – application to the synthesis of natural products. Nat Prod Rep 2011; 28:763-82. [DOI: 10.1039/c0np00053a] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Imagawa H, Oda M, Takemoto T, Yamauchi R, Yoshikawa T, Yamamoto H, Nishizawa M, Takahashi H, Hashimoto M, Yabiku K, Nagahama M, Sakurai J. Synthesis and evaluation of novel phosphate ester analogs as neutral sphingomyelinase inhibitors. Bioorg Med Chem Lett 2010; 20:3868-71. [PMID: 20627555 DOI: 10.1016/j.bmcl.2010.05.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 05/08/2010] [Accepted: 05/12/2010] [Indexed: 11/28/2022]
Abstract
A novel sphingomyelin inhibitor RY221B-a, which contains a bipyridyl moiety as a metal coordination site was designed based upon the mechanism of phosphate ester hydrolysis. RY221B-a was synthesized from N-Boc-sphingosine in three steps via selective etherification using stannyl acetal. Synthesized RY221B-a exhibited relatively-strong inhibitory activity against Bc-SMase (IC(50)=1.2microM).
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15
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Cha JY, Huang Y, Pettus TRR. Total synthesis of TK-57-164A, isariotin F, and their putative progenitor isariotin E. Angew Chem Int Ed Engl 2010; 48:9519-21. [PMID: 19921667 DOI: 10.1002/anie.200904716] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jacob Y Cha
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106-9510, USA
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16
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Pitsinos E, Athinaios N, Xu Z, Wang G, Negishi EI. Total synthesis of (+)-scyphostatin featuring an enantioselective and highly efficient route to the side-chain via Zr-catalyzed asymmetric carboalumination of alkenes (ZACA). Chem Commun (Camb) 2010; 46:2200-2. [PMID: 20234905 DOI: 10.1039/b920261g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(+)-Scyphostatin (1) was synthesized via (i) construction of a side-chain 3b of > or = 98% purity in 19% yield in eleven steps featuring ZACA reaction, Negishi coupling, and HWE olefination, (ii) an asymmetric synthesis of a fully protected core 4 from 10a, and (iii) a three-step assembly of 1 in 42% yield.
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Affiliation(s)
- Emmanuel Pitsinos
- Laboratory of Natural Products Synthesis & Bioorganic Chemistry, Institute of Physical Chemistry, NCSR DEMOKRITOS, P.O. Box 60228, GR 153 10, Aghia Paraskevi, Greece.
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17
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Katoh T, Oguchi T, Watanabe K, Abe H. Enantioselective Total Synthesis of Novel Diterpenoid Pyrones (+)-Sesquicillin and (-)-Nalanthalide from Fungal Fermentations. HETEROCYCLES 2010. [DOI: 10.3987/com-08-s(s)2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Jung SI, Tam NT, Cho CG. Bromination/Hydrolytic Fragmentation Reactions of α,β-Unsaturated N-Boc Lactams for the Synthesis of ω-Amino-trisubstituted (E)-Vinyl Bromides. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.12.2863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Cha J, Huang Y, Pettus T. Total Synthesis of TK-57-164A, Isariotin F, and Their Putative Progenitor Isariotin E. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904716] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Wang G, Huang Z, Negishi EI. Highly stereoselective and efficient synthesis of ω-heterofunctional di- and trienoic esters for Horner–Wadsworth–Emmons reaction via alkyne hydrozirconation and Pd-catalyzed alkenylation. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Oguchi T, Watanabe K, Ohkubo K, Abe H, Katoh T. Enantioselective total synthesis of (-)-candelalides A, B and C: potential Kv1.3 blocking immunosuppressive agents. Chemistry 2009; 15:2826-45. [PMID: 19191240 DOI: 10.1002/chem.200802122] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Novel Kv1.3 blocking immunosuppressants, (-)-candelalides A, B and C, were efficiently synthesized for the first time in a convergent and unified manner starting from (+)-5-methyl-Wieland-Miescher ketone. The synthetic method involved the following key steps: i) a strategic [2,3]-Wittig rearrangement of a stannylmethyl ether to install the stereogenic center at C9 and the exo-methylene function at C8 present in the decalin portion; ii) a straightforward coupling of a trans-decalin portion (BC ring) and a gamma-pyrone moiety through the C16-C3' bond to assemble the requisite carbon framework; and iii) a construction of a characteristic di or tetrahydropyran ring (A ring) by internal nucleophilic ring closure of a hydroxy aldehyde or a hydroxy epoxide. The present total synthesis has fully established the absolute configuration of these natural products.
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Affiliation(s)
- Takamasa Oguchi
- Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
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22
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Fujioka H, Kita Y. Stereocontrol between Remote Atom Centers Using Chiral Acetals and its Application to Asymmetric Syntheses of Natural Products. J SYN ORG CHEM JPN 2009. [DOI: 10.5059/yukigoseikyokaishi.67.606] [Citation(s) in RCA: 6] [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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23
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Wang QG, Deng XM, Zhu BH, Ye LW, Sun XL, Li CY, Zhu CY, Shen Q, Tang Y. Tandem Michael Addition/Ylide Epoxidation for the Synthesis of Highly Functionalized Cyclohexadiene Epoxide Derivatives. J Am Chem Soc 2008; 130:5408-9. [DOI: 10.1021/ja800747m] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qing-Gang Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Xian-Ming Deng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Ben-Hu Zhu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Long-Wu Ye
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Xiu-Li Sun
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Chuan-Ying Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Chun-Yin Zhu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Qi Shen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
| | - Yong Tang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 354 FengLin Lu, Shanghai 200032, China, and School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
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Fujioka H, Sawama Y, Kotoku N, Ohnaka T, Okitsu T, Murata N, Kubo O, Li R, Kita Y. Concise Asymmetric Total Synthesis of Scyphostatin, a Potent Inhibitor of Neutral Sphingomyelinase. Chemistry 2007; 13:10225-38. [PMID: 17907134 DOI: 10.1002/chem.200700871] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The concise asymmetric total synthesis of scyphostatin has been achieved by condensation of the optically active cyclohexane unit, prepared from the commercially available 1,4-cyclohexadiene by our own method, and the side chain, prepared by the method developed by Hoye and Tennakoon (T. R. Hoye, M. A. Tennakoon, Org. Lett. 2000, 2, 1481-1483). The modification of the epoxy cyclohexenone unit was achieved in a late stage of the total synthesis, and deprotection of the primary alcohol was conducted in the final step. During the synthesis several key reactions were attained: 1) intramolecular bromoetherification of the cyclohexadiene acetal; 2) stereoselective introduction of the tertiary alcohol, 3) deprotection of the acetal function to the aldehyde by combination with silyl triflate/2,4,6-collidine and the one-pot synthesis of the disilyl aldehyde compounds, with different types of silyl groups, from the dihydroxy acetal compounds; and 4) facile deprotection of the 2,4-dimethoxyphenylmethyl ((2,4)DMPM) protecting group of the primary alcohol.
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Affiliation(s)
- Hiromichi Fujioka
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.
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25
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Zhu G, Negishi EI. 1,4-Pentenyne as a Five-Carbon Synthon for Efficient and Selective Syntheses of Natural Products Containing 2,4-Dimethyl-1-penten-1,5-ylidene and Related Moieties by Means of Zr-Catalyzed Carboalumination of Alkynes and Alkenes. Chemistry 2007; 14:311-8. [DOI: 10.1002/chem.200701512] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Takagi R, Miyanaga W, Tojo K, Tsuyumine S, Ohkata K. Stereoselective Total Synthesis of (+)-Scyphostatin via a π-Facially Selective Diels−Alder Reaction. J Org Chem 2007; 72:4117-25. [PMID: 17477576 DOI: 10.1021/jo070337k] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A stereoselective total synthesis of scyphostatin is described. The hydrophilic moiety was stereoselectively synthesized via (i) a highly pi-facially selective Diels-Alder reaction of a spirolactone generated from L-tyrosine and (ii) a hydroxy group directed epoxidation as key reactions. The hydrophilic moiety was combined with the hydrophobic side chain in the final stage. Total synthesis was achieved by overcoming the instability of the C5-C6 epoxide ring with carefully executed mild reactions. In the course of this work, it was revealed that we had mistakenly assigned the relative stereochemistry of the C5-C6 epoxide ring of the end product in our previous model study. Revision of the stereochemical assignment in the model study is described. A diastereomer of (+)-scyphostatin epimeric at C5 and C6 (the epoxide region) was also synthesized.
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Affiliation(s)
- Ryukichi Takagi
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
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27
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Pitsinos EN, Moutsos VI, Vageli O. Synthesis of enantiopure (S)-7-hydroxy-3-amino-3,4-dihydro-2H-1-benzopyran en route to (+)-scyphostatin. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Negishi EI. Transition Metal-Catalyzed Organometallic Reactions that Have Revolutionized Organic Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.233] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Katoh T, Watanabe K, Oguchi T, Takizawa T, Furuuchi M, Abe H. Synthesis of Scyphostatin Analogs Possessing Various Saturated Fatty Acid Side-Chains. HETEROCYCLES 2007. [DOI: 10.3987/com-07-s(u)52] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Asano M, Inoue M, Watanabe K, Abe H, Katoh T. Synthetic Studies toward GKK1032s, Novel Antibiotic Antitumor Agents: Enantioselective Synthesis of the Fully Elaborated Tricyclic Core via an Intramolecular Diels−Alder Cycloaddition. J Org Chem 2006; 71:6942-51. [PMID: 16930048 DOI: 10.1021/jo0610208] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An enantioselective synthesis of the fully elaborated tricyclic decahydrofluorene core (ABC-ring system) of GKK1032s, novel antimicrobial and antitumor agents, has been accomplished for the first time by employing a highly diastereoselective intramolecular Diels-Alder (IMDA) reaction. The key substrate for the IMDA reaction was efficiently prepared through (i) an intermolecular Diels-Alder reaction between a siloxydiene and an optically active enone derived from D-mannitol to construct the appropriately functionalized C-ring and (ii) CuCl-promoted Stille coupling of an (E)-vinyl iodide and a vinylstannane to install the requisite triene side chain as the crucial steps.
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Affiliation(s)
- Moriteru Asano
- Department of Electronic Chemistry, Tokyo Institute of Technology, Nagatsuta, Yokohama 226-8502, Japan
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32
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2004. Coord Chem Rev 2006. [DOI: 10.1016/j.ccr.2005.10.020] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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33
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Wascholowski V, Giannis A, Pitsinos EN. Influence of the Scyphostatin Side Chain on the Mode of Inhibition of Neutral Sphingomyelinase. ChemMedChem 2006; 1:718-21. [PMID: 16902925 DOI: 10.1002/cmdc.200600099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Veit Wascholowski
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
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Abstract
An effective, readily scalable two-step synthesis of trisubstituted (E)-vinyl bromides involving bromination of alpha,beta-unsaturated lactones followed by hydrolytic fragmentation has been developed. Several trisubstituted (E)-vinyl bromides, including multigram quantities of (+)-(E)-4-bromo-2-methyl-3-pentenol, a synthetic intermediate required for the C(8)-C(11) moieties of (+)-tedanolide (1) and (+)-13-deoxytedanolide (2), illustrate the utility of this protocol. [reaction: see text]
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Affiliation(s)
- Cheon-Gyu Cho
- Department of Chemistry, Hanyang University, Seoul, Korea 133-791.
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35
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Abe T, Iwasaki K, Inoue M, Suzuki T, Watanabe K, Katoh T. Convergent and enantioselective total synthesis of (−)-nalanthalide, a potential Kv1.3 blocking immunosuppressant. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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Enantiocontrolled synthesis of the epoxycyclohexenone moieties of scyphostatin, a potent and specific inhibitor of neutral sphingomyelinase. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.10.082] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wascholowski V, Giannis A. Sphingolactones: Selective and Irreversible Inhibitors of Neutral Sphingomyelinase. Angew Chem Int Ed Engl 2006; 45:827-30. [PMID: 16365835 DOI: 10.1002/anie.200501983] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Veit Wascholowski
- University of Leipzig, Institute of Organic Chemistry, 04103 Leipzig, Germany
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38
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Wascholowski V, Giannis A. Sphingolactone: selektive und irreversibel wirkende Inhibitoren der neutralen Sphingomyelinase. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200501983] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Claus RA, Wüstholz A, Müller S, Bockmeyer CL, Riedel NH, Kinscherf R, Deigner HP. Synthesis and Antiapoptotic Activity of a Novel Analogue of the Neutral Sphingomyelinase Inhibitor Scyphostatin. Chembiochem 2005; 6:726-37. [PMID: 15751001 DOI: 10.1002/cbic.200400228] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The enantioselective synthesis of an analogue of scyphostatin, a potent inhibitor of the neutral sphingomyelinase, is described. The synthesis starts with cyclohexanone and a protected D-serine derivative. The key step is an asymmetric hydroxylation to access a hydroxycyclohexanone, which is transformed into a substituted hydroxycyclohexenone. This is converted into the scyphostatin analogue 14, a chemically and metabolically stabilised compound lacking the epoxy function of the natural congener and carrying a palmitic acid group instead of the native trienoyl residue. An evaluation of the biological activity of 14 revealed neutral sphingomyelinase inhibition in several in vivo test systems (monocytes, macrophages, hepatocytes) monitoring antiapoptotic effects and the inversion of phorbolester-induced translocation of green fluorescent protein labelled kinase (protein kinase C-alpha).
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Affiliation(s)
- Ralf A Claus
- Department for Anaesthesiology and Intensive Care Therapy, Division for Experimental Anaesthesiology, Friedrich-Schiller-University Jena, Research Centre Lobeda, Erlanger Allee 101, 07747 Jena, Germany
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40
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Takagi R, Tojo K, Iwata M, Ohkata K. Synthesis of a 4,5-epoxy-2-cyclohexen-1-one derivative via epoxide ring opening, 1,3-carbonyl transposition and epoxide ring regeneration: a synthetic study on a scyphostatin analogue. Org Biomol Chem 2005; 3:2031-6. [PMID: 15889188 DOI: 10.1039/b504039f] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 6-alkyl-4,5-epoxy-6-hydroxy-2-cyclohexen-1-one derivative, a model compound for the hydrophilic moiety of scyphostatin, was stereoselectively synthesized from the Diels-Alder adduct. The key steps were the reductive cleavage of the 4,5-epoxide ring of the epoxidated adduct, the 1,3-carbonyl transposition of the 3-carbonyl group to the C1 position by a Wharton reaction and stereoselective bromination to provide a trans bromohydrin derivative, a precursor to the desired compound. Desilylation of the bromohydrin derivative with TBAF directly gave the target compound.
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Affiliation(s)
- Ryukichi Takagi
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
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