1
|
Ono Y, Nakazaki A, Ueki K, Higuchi K, Sriphana U, Adachi M, Nishikawa T. Asymmetric Synthesis of the Aromatic Fragment of Sespendole. J Org Chem 2019; 84:9750-9757. [PMID: 31266301 DOI: 10.1021/acs.joc.9b01597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sespendole is an indole sesquiterpene alkaloid bearing two isoprenyl groups, one of which is highly oxidized. Herein, we disclose an eight-step synthesis of the aromatic fragment of sespendole in an optically pure form, starting from 4-bromo-2-fluoronitrobenzene. The key steps were a Claisen rearrangement at room temperature for introduction of the prenyl group and a coupling between the dianion generated from prenylated bromo-N-tosylanilide and a chiral epoxy aldehyde.
Collapse
Affiliation(s)
- Yoshiki Ono
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| | - Atsuo Nakazaki
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| | - Kaori Ueki
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| | - Keiko Higuchi
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| | - Uraiwan Sriphana
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| | - Masaatsu Adachi
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| | - Toshio Nishikawa
- Graduate School of Bioagricultural Sciences , Nagoya University , Furo-cho, Chikusa , Nagoya 464-8601 , Japan
| |
Collapse
|
2
|
Porter NJ, Christianson DW. Binding of the Microbial Cyclic Tetrapeptide Trapoxin A to the Class I Histone Deacetylase HDAC8. ACS Chem Biol 2017; 12:2281-2286. [PMID: 28846375 DOI: 10.1021/acschembio.7b00330] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Trapoxin A is a microbial cyclic tetrapeptide that is an essentially irreversible inhibitor of class I histone deacetylases (HDACs). The inhibitory warhead is the α,β-epoxyketone side-chain of (2S,9S)-2-amino-8-oxo-9,10-epoxydecanoic acid (l-Aoe), which mimics the side-chain of the HDAC substrate acetyl-l-lysine. We now report the crystal structure of the HDAC8-trapoxin A complex at 1.24 Å resolution, revealing that the ketone moiety of l-Aoe undergoes nucleophilic attack to form a zinc-bound tetrahedral gem-diolate that mimics the tetrahedral intermediate and its flanking transition states in catalysis. Mass spectrometry, activity measurements, and isothermal titration calorimetry confirm that trapoxin A binds tightly (Kd = 3 ± 1 nM) and does not covalently modify the enzyme, so the epoxide moiety of l-Aoe remains intact. Comparison of the HDAC8-trapoxin A complex with the HDAC6-HC toxin complex provides new insight regarding the inhibitory potency of l-Aoe-containing natural products against class I and class II HDACs.
Collapse
Affiliation(s)
- Nicholas J. Porter
- Roy and Diana Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - David W. Christianson
- Roy and Diana Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| |
Collapse
|
3
|
Kim SW, Lee W, Krische MJ. Asymmetric Allylation of Glycidols Mediated by Allyl Acetate via Iridium-Catalyzed Hydrogen Transfer. Org Lett 2017; 19:1252-1254. [PMID: 28221810 PMCID: PMC5651674 DOI: 10.1021/acs.orglett.7b00343] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Glycidols prepared via Sharpless asymmetric epoxidation participate in asymmetric redox-neutral carbonyl allylation with good levels of catalyst-directed diastereoselectivity. Equally stereoselective allylations may be performed from the aldehyde oxidation level using 2-propanol as the terminal reductant. An epoxide ring-opening reaction using AlMe3-n-BuLi is used to prepare the propionate-based stereotetrad spanning C17-C23 of dictyostatin, illustrating how this method may be applied to polyketide construction.
Collapse
Affiliation(s)
- Seung Wook Kim
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712
| | - Wonchul Lee
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712
| |
Collapse
|
4
|
Trapp O, Zawatzky K. Synthesis of Cryptochiral (R,R)-2,3-Dideuterooxirane as Stereochemical Reference Compound and Chemical Correlation with D-(+)-Glyceraldehyde. Isr J Chem 2016. [DOI: 10.1002/ijch.201600111] [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]
Affiliation(s)
- Oliver Trapp
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstr. 5-13 81377 München Germany
- Max-Planck-Institut für Astronomie; Königstuhl 17 69117 Heidelberg Germany
| | - Kerstin Zawatzky
- Merck Research Laboratories; Department of Process & Analytical Chemistry; Rahway, New Jersey USA
| |
Collapse
|
5
|
Zawatzky K, Herwig P, Grieser M, Heber O, Jordon-Thaden B, Krantz C, Novotný O, Repnow R, Schurig V, Schwalm D, Vager Z, Wolf A, Kreckel H, Trapp O. Coulomb Explosion Imaged Cryptochiral (R,R)-2,3-Dideuterooxirane: Unambiguous Access to the Absolute Configuration of (+)-Glyceraldehyde. Chemistry 2014; 20:5555-8. [DOI: 10.1002/chem.201400296] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Indexed: 11/05/2022]
|
6
|
Herwig P, Zawatzky K, Grieser M, Heber O, Jordon-Thaden B, Krantz C, Novotny O, Repnow R, Schurig V, Schwalm D, Vager Z, Wolf A, Trapp O, Kreckel H. Imaging the Absolute Configuration of a Chiral Epoxide in the Gas Phase. Science 2013; 342:1084-6. [DOI: 10.1126/science.1246549] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
7
|
Righi G, Ferrara A, Mari A, Bovicelli P. Novel Stereocontrolled Preparation of Amino Polyols from 2,3-Aziridine Alcohols. SYNTHETIC COMMUN 2010. [DOI: 10.1080/00397910903161645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Giuliana Righi
- a Institute of Biomolecular Chemistry (CNR), Department of Chemistry , Sapienza University , Rome, Italy
| | - Angela Ferrara
- a Institute of Biomolecular Chemistry (CNR), Department of Chemistry , Sapienza University , Rome, Italy
| | - Alessandra Mari
- a Institute of Biomolecular Chemistry (CNR), Department of Chemistry , Sapienza University , Rome, Italy
| | - Paolo Bovicelli
- b Institute of Biomolecular Chemistry (CNR) , Sassari, Italy
| |
Collapse
|
8
|
Righi G, Catullo S. 2,3‐Bifunctionalized Aziridines: Regioselective MgBr2‐Mediated Opening Under “Chelation Controlled” Conditions. SYNTHETIC COMMUN 2004. [DOI: 10.1081/scc-120027242] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
9
|
|
10
|
|
11
|
Le Bideau F, Gilloir F, Nilsson Y, Aubert C, Malacria M. Stereocontrolled synthesis of α-trialkylsilyl-β, γ-unsaturated aldehydes via palladium (0) catalysis. Synthetic usefulness. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00264-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
12
|
Pégorier L, Petit Y, Larchevêque M. A synthetic route to anti aminoalkyl epoxides by stereocontrolled reductive amination of ketoepoxides. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/c39940000633] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|