1
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Schäfer SC, Voll AM, Bracher A, Ley SV, Hausch F. Antascomicin B stabilizes FKBP51-Akt1 complexes as a molecular glue. Bioorg Med Chem Lett 2024; 104:129728. [PMID: 38582133 DOI: 10.1016/j.bmcl.2024.129728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/24/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
Antascomicin B is a natural product that similarly to the macrolides FK506 and Rapamycin binds to the FK506-binding protein 12 (FKBP12). FK506 and Rapamycin act as molecular glues by inducing ternary complexes between FKBPs and additional target proteins. Whether Antascomicin B can induce ternary complexes is unknown. Here we show that Antascomicin B binds tightly to larger human FKBP homologs. The cocrystal structure of FKBP51 in complex with Antascomicin B revealed that large parts of Antascomicin B are solvent-exposed and available to engage additional proteins. Cellular studies demonstrated that Antascomicin B enhances the interaction between human FKBP51 and human Akt. Our studies show that molecules with molecular glue-like properties are more prominent in nature than previously thought. We predict the existence of additional 'orphan' molecular glues that evolved to induce ternary protein complexes but where the relevant ternary complex partners are unknown.
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Affiliation(s)
- Sabine C Schäfer
- Department of Chemistry and Biochemistry, Clemens-Schöpf-Institute Technical University Darmstadt Peter-Grünberg-Straße 4, 64287 Darmstadt, Germany
| | - Andreas M Voll
- Department of Chemistry and Biochemistry, Clemens-Schöpf-Institute Technical University Darmstadt Peter-Grünberg-Straße 4, 64287 Darmstadt, Germany
| | - Andreas Bracher
- Department of Cellular Biochemistry, Max-Planck-Institute of Biochemistry, Planegg-Martinsried, Germany
| | - Steven V Ley
- Yusuf Hamied Department of Chemistry, University of Cambridge, England
| | - Felix Hausch
- Department of Chemistry and Biochemistry, Clemens-Schöpf-Institute Technical University Darmstadt Peter-Grünberg-Straße 4, 64287 Darmstadt, Germany; Centre for Synthetic Biology, Technical University Darmstadt, Darmstadt, Germany.
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2
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Schwans CL, Clark TD, O’Neil GW. Hydroxyl-Directed Regio- and Diastereoselective Allylic Sulfone Reductions with [Sm(H 2O) n]I 2. J Org Chem 2024; 89:692-700. [PMID: 38091512 PMCID: PMC10777405 DOI: 10.1021/acs.joc.3c01647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/19/2023] [Accepted: 11/21/2023] [Indexed: 01/06/2024]
Abstract
Allylic 1,2- and 1,3-hydroxy phenyl sulfones undergo regioselective and diastereoselective desulfonylation with double bond migration upon treatment with [Sm(H2O)n]I2. Selectivity in these reactions is thought to arise from the formation of a chelated organosamarium intermediate followed by intramolecular protonation by samarium-bound water, which is supported by observed diastereoselectivity and stereospecificity trends along with deuterium labeling experiments. The reaction was then featured in the synthesis of the phenolic fragment of the thailandamide natural products.
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Affiliation(s)
- Cody L. Schwans
- Department of Chemistry, Western Washington University, Bellingham, Washington 98225, United States
| | - Trevor D. Clark
- Department of Chemistry, Western Washington University, Bellingham, Washington 98225, United States
| | - Gregory W. O’Neil
- Department of Chemistry, Western Washington University, Bellingham, Washington 98225, United States
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3
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Wen X, Gao M, Chen Y, Zhao Y, Qin W, Hu L. Tunable Reaction Mode of Bifunctional Peroxides with Ketones to Access α-Oxacyclic Ketones and Enals. Org Lett 2022; 24:8387-8391. [DOI: 10.1021/acs.orglett.2c03440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaolu Wen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Min Gao
- College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000, China
| | - Yiwei Chen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Yukun Zhao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Wenling Qin
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Lin Hu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
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4
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Yan S, Zeng M, Wang H, Zhang H. Micromonospora: A Prolific Source of Bioactive Secondary Metabolites with Therapeutic Potential. J Med Chem 2022; 65:8735-8771. [PMID: 35766919 DOI: 10.1021/acs.jmedchem.2c00626] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Micromonospora, one of the most important actinomycetes genera, is well-known as the treasure trove of bioactive secondary metabolites (SMs). Herein, together with an in-depth genomic analysis of the reported Micromonospora strains, all SMs from this genus are comprehensively summarized, containing structural features, bioactive properties, and mode of actions as well as their biosynthetic and chemical synthesis pathways. The perspective enables a detailed view of Micromonospora-derived SMs, which will enrich the chemical diversity of natural products and inspire new drug discovery in the pharmaceutical industry.
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Affiliation(s)
- Suqi Yan
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
| | - Mingyuan Zeng
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hong Wang
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
| | - Huawei Zhang
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
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5
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Shimizu M, Yamamoto T, Shindo H, Mizota I, Zhu Y. 2,3-Dimethoxy-2,3-dimethyl-1,4-dioxane as a useful precursor to 2,3-dimethylene-1,4-dioxane for [4+2] cycloaddition reaction. RSC Adv 2021; 11:7972-7980. [PMID: 35423349 PMCID: PMC8695070 DOI: 10.1039/d1ra00329a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 02/11/2021] [Indexed: 11/24/2022] Open
Abstract
2,3-Dimethoxy-2,3-dimethyl-1,4-dioxane readily prepared from biacetyl serves as a stable precursor to 2,3-dimethylene-1,4-dioxane which undergoes a [4+2] cycloaddition reaction with dienophiles to give functionalized cyclohexene derivatives. The cycloaddition adducts obtained by the present procedure are transformed into potentially useful intermediates for biologically important materials. 2,3-Dimethoxy-2,3-dimethyl-1,4-dioxane serves as a stable precursor to 2,3-dimethylene-1,4-dioxane which undergoes a cycloaddition with dienophiles. The adducts are transformed into useful intermediates for biologically important materials.![]()
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Affiliation(s)
- Makoto Shimizu
- School of Energy Science and Engineering
- Nanjing Tech University
- Nanjing 211816
- China
- Department of Chemistry for Materials
| | - Toshihiro Yamamoto
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
| | - Hiroaki Shindo
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
| | - Isao Mizota
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
| | - Yusong Zhu
- School of Energy Science and Engineering
- Nanjing Tech University
- Nanjing 211816
- China
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6
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Hifnawy MS, Fouda MM, Sayed AM, Mohammed R, Hassan HM, AbouZid SF, Rateb ME, Keller A, Adamek M, Ziemert N, Abdelmohsen UR. The genus Micromonospora as a model microorganism for bioactive natural product discovery. RSC Adv 2020; 10:20939-20959. [PMID: 35517724 PMCID: PMC9054317 DOI: 10.1039/d0ra04025h] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/28/2020] [Indexed: 11/21/2022] Open
Abstract
This review covers the development of the genus Micromonospora as a model for natural product research and the timeline of discovery progress from the classical bioassay-guided approaches through the application of genome mining and genetic engineering techniques that target specific products. It focuses on the reported chemical structures along with their biological activities and the synthetic and biosynthetic studies they have inspired. This survey summarizes the extraordinary biosynthetic diversity that can emerge from a widely distributed actinomycete genus and supports future efforts to explore under-explored species in the search for novel natural products. We explore the genus Micromonospora as a model for natural product research and the discovery progress from the classical bioassay-guided approaches through to the application of genome mining and genetic engineering techniques that target specific products.![]()
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7
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Shrestha ML, Qi W, McIntosh MC. Acyclic 1,4-Stereocontrol via the Allylic Diazene Rearrangement: Development, Applications, and the Essential Role of Kinetic E Stereoselectivity in Tosylhydrazone Formation. J Org Chem 2017; 82:8359-8370. [PMID: 28776373 DOI: 10.1021/acs.joc.7b00428] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report full details of a method for 1,3-reductive transposition of α-alkoxy-α,β-unsaturated hydrazones to provide E-alkenes with high 1,4-stereocontrol between the two respective allylic stereocenters. The process couples a chelation-controlled reduction of the hydrazone with an in situ allylic strain controlled retro-ene reaction of an allyl diazene, i.e., an allylic diazene rearrangement. Such stereotriads are frequently observed motifs in natural products. We observed a fortuitous kinetic preference for the E-hydrazone geometry during the hydrazonation reaction, as only the E-isomers could undergo chelation-controlled reduction.
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Affiliation(s)
- Maha L Shrestha
- University of Arkansas , 119 Chemistry Bldg, Fayetteville, Arkansas 72701, United States
| | - Wei Qi
- University of Arkansas , 119 Chemistry Bldg, Fayetteville, Arkansas 72701, United States
| | - Matthias C McIntosh
- University of Arkansas , 119 Chemistry Bldg, Fayetteville, Arkansas 72701, United States
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8
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Buckler JN, Meek T, Banwell MG, Carr PD. Total Synthesis of the Cyclic Carbonate-Containing Natural Product Aspergillusol B from d-(-)-Tartaric Acid. JOURNAL OF NATURAL PRODUCTS 2017; 80:2088-2093. [PMID: 28722413 DOI: 10.1021/acs.jnatprod.7b00303] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A total synthesis of compound 3 from d-(-)-tartaric acid is reported, thereby establishing that the structure, including relative stereochemistry, originally assigned to the cyclic carbonate-containing natural product aspergillusol B is correct.
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Affiliation(s)
- Joshua N Buckler
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Tamaryn Meek
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Paul D Carr
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
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9
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Qin T, Cornella J, Li C, Malins LR, Edwards JT, Kawamura S, Maxwell BD, Eastgate MD, Baran PS. A general alkyl-alkyl cross-coupling enabled by redox-active esters and alkylzinc reagents. Science 2016; 352:801-5. [PMID: 27103669 PMCID: PMC4867118 DOI: 10.1126/science.aaf6123] [Citation(s) in RCA: 521] [Impact Index Per Article: 65.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 04/11/2016] [Indexed: 12/29/2022]
Abstract
Alkyl carboxylic acids are ubiquitous in all facets of chemical science, from natural products to polymers, and represent an ideal starting material with which to forge new connections. This study demonstrates how the same activating principles used for decades to make simple C-N (amide) bonds from carboxylic acids with loss of water can be used to make C-C bonds through coupling with dialkylzinc reagents and loss of carbon dioxide. This disconnection strategy benefits from the use of a simple, inexpensive nickel catalyst and exhibits a remarkably broad scope across a range of substrates (>70 examples).
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Affiliation(s)
- Tian Qin
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Josep Cornella
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Chao Li
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Lara R Malins
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jacob T Edwards
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Shuhei Kawamura
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Brad D Maxwell
- Discovery Chemistry Platforms-Radiochemistry, Bristol-Myers Squibb, Post Office Box 4000, Princeton, NJ, USA
| | - Martin D Eastgate
- Chemical Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, NJ 08903, USA
| | - Phil S Baran
- Department of Chemistry, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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10
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11
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Hausch F. FKBPs and their role in neuronal signaling. Biochim Biophys Acta Gen Subj 2015; 1850:2035-40. [PMID: 25615537 DOI: 10.1016/j.bbagen.2015.01.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 01/10/2015] [Accepted: 01/12/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Ligands for FK506-binding proteins, also referred to as neuroimmunophilin ligands, have repeatedly been described as neuritotrophic, neuroprotective or neuroregenerative agents. However, the precise molecular mechanism of action underlying the observed effects has remained elusive, which eventually led to a reduced interest in FKBP ligand development. SCOPE OF REVIEW A survey is presented on the pharmacology of neuroimmunophilin ligands, of the current understanding of individual FKBP homologs in neuronal processes and an assessment of their potential as drug targets for CNS disorders. MAJOR CONCLUSIONS FKBP51 is the major target accounting for the neuritotrophic effect of neuroimmunophilin ligands. Selectivity against the homolog FKBP52 is essential for optimal neuritotrophic efficacy. GENERAL SIGNIFICANCE Selectivity within the FKBP family, in particular selective inhibition of FKBP12 or FKBP51, is possible. FKBP51 is a pharmacologically tractable target for stress-related disorders. The role of FKBPs in neurodegeneration remains to be clarified. This article is part of a Special Issue entitled Proline-directed Foldases: Cell Signaling Catalysts and Drug Targets.
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Affiliation(s)
- Felix Hausch
- Max Planck Institute of Psychiatry, 80804 Munich, Germany.
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12
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Fan YY, Zhang H, Zhou Y, Liu HB, Tang W, Zhou B, Zuo JP, Yue JM. Phainanoids A–F, A New Class of Potent Immunosuppressive Triterpenoids with an Unprecedented Carbon Skeleton from Phyllanthus hainanensis. J Am Chem Soc 2014; 137:138-41. [DOI: 10.1021/ja511813g] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Yao-Yue Fan
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Hua Zhang
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Yu Zhou
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Hong-Bing Liu
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Wei Tang
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Bin Zhou
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Jian-Ping Zuo
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research,
Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People’s Republic of China
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13
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14
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Selective inhibitors of the FK506-binding protein 51 by induced fit. Nat Chem Biol 2014; 11:33-7. [PMID: 25436518 DOI: 10.1038/nchembio.1699] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 10/09/2014] [Indexed: 01/17/2023]
Abstract
The FK506-binding protein 51 (FKBP51, encoded by the FKBP5 gene) is an established risk factor for stress-related psychiatric disorders such as major depression. Drug discovery for FKBP51 has been hampered by the inability to pharmacologically differentiate against the structurally similar but functional opposing homolog FKBP52, and all known FKBP ligands are unselective. Here, we report the discovery of the potent and highly selective inhibitors of FKBP51, SAFit1 and SAFit2. This new class of ligands achieves selectivity for FKBP51 by an induced-fit mechanism that is much less favorable for FKBP52. By using these ligands, we demonstrate that selective inhibition of FKBP51 enhances neurite elongation in neuronal cultures and improves neuroendocrine feedback and stress-coping behavior in mice. Our findings provide the structural and functional basis for the development of mechanistically new antidepressants.
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15
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16
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Wang CC, Tang Y, Yang K, Li XY, Wu YB, Hsung RP. A carbohydrate based chiron approach to the lactone intermediate employed in the synthesis of BC-ring fragment of (+)-spirastrellolide A. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Yus M, González-Gómez JC, Foubelo F. Diastereoselective Allylation of Carbonyl Compounds and Imines: Application to the Synthesis of Natural Products. Chem Rev 2013; 113:5595-698. [DOI: 10.1021/cr400008h] [Citation(s) in RCA: 398] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Miguel Yus
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - José C. González-Gómez
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - Francisco Foubelo
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
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19
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Clay DR, McIntosh MC. Anomalies in the asymmetric transfer hydrogenation of several polycyclic meso compounds. Tetrahedron Lett 2012; 53:1691-1694. [PMID: 22707800 PMCID: PMC3374411 DOI: 10.1016/j.tetlet.2011.12.123] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Over the course of developing a multigram scale preparation of epoxy quinol 1 via asymmetric transfer hydrogenation (ATH) using the Noyori Ru(arene)(S,S-TsDPEN) catalysts, we observed several unexpected phenomena, including (i) chemoselective alkene vs ketone reduction of an enedione, (ii) a significant arene ligand effect (p-cymene vs. mesitylene) on the reaction pathway, and (iii) solvent-based reversal of the sense of enantioinduction.
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Affiliation(s)
- David R. Clay
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701
| | - Matthias C. McIntosh
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701
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20
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Vyas Devambatla RK, Velagaleti R, Yarravarapu N, Fleming FF. SNi′ displacements with main group organometallics. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Hutchison JM, Gibson AS, Williams DT, McIntosh MC. Synthesis of the C21-C34 fragment of antascomicin B. Tetrahedron Lett 2011; 52:6349-6351. [PMID: 22199407 PMCID: PMC3244276 DOI: 10.1016/j.tetlet.2011.09.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The C21-C34 fragment of the potent FKBP12-binding macrolide antascomicin B was prepared using Ireland-Claisen and allylic diazene rearrangements to establish the C26/C27 and the C23 stereocenters, respectively. Directed hydrogenation installed the C29 β-configuration. The fragment possesses 7 of the 11 fixed stereocenters contained in the natural product.
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Affiliation(s)
| | - Andrew S. Gibson
- University of Arkansas, 119 Chemistry Building, Fayetteville, AR 72701, USA
| | - David T. Williams
- University of Arkansas, 119 Chemistry Building, Fayetteville, AR 72701, USA
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22
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Clay DR, Rosenberg AG, McIntosh MC. Efficient, scalable asymmetric synthesis of an epoxy quinol via Noyori desymmetrization of a meso diketone. TETRAHEDRON, ASYMMETRY 2011; 22:713-716. [PMID: 21743778 PMCID: PMC3131412 DOI: 10.1016/j.tetasy.2011.04.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Epoxy quinol 1a was prepared on a multi-gram scale by Noyori transfer hydrogenative desymmetrization of the readily available meso epoxy diketone 4. Although the intrinsic enantioselectivity for the desymmetrization was modest (82:18 er at 4% conversion), a highly enantiopure product (99.6:0.4 er) could be obtained in one operation in 44% yield via kinetic resolution of the minor enantiomer with long reaction times (48 h), or in 73% yield by combination with an enzymatic resolution of a 93:7 er mixture.
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Affiliation(s)
- David R. Clay
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | - Ashley G. Rosenberg
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | - Matthias C. McIntosh
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
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23
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Français A, Leyva-Pérez A, Etxebarria-Jardi G, Peña J, Ley SV. Total Synthesis of Iso- and Bongkrekic Acids: Natural Antibiotics Displaying Potent Antiapoptotic Properties. Chemistry 2010; 17:329-43. [DOI: 10.1002/chem.201002380] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Indexed: 11/05/2022]
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24
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25
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Ravikumar PC, Yao L, Fleming FF. Allylic and allenic halide synthesis via NbCl(5)- and NbBr(5)-mediated alkoxide rearrangements. J Org Chem 2009; 74:7294-9. [PMID: 19739606 PMCID: PMC2754319 DOI: 10.1021/jo901287f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Addition of NbCl(5) or NbBr(5) to a series of magnesium, lithium, or potassium allylic or propargylic alkoxides directly provides allylic or allenic halides. Halogenation formally occurs through a metalla-halo-[3,3] rearrangement, although concerted, ionic, and direct displacement mechanisms appear to operate competitively. Transposition of the olefin is equally effective for allylic alkoxides prepared by nucleophilic addition, deprotonation, or reduction. Experimentally, the niobium pentahalide halogenations are rapid, afford essentially pure (E)-allylic or -allenic halides after extraction, and are applicable to a range of aliphatic and aromatic alcohols, aldehydes, and ketones.
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Affiliation(s)
- P. C. Ravikumar
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282-1530
| | - Lihua Yao
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282-1530
| | - Fraser F. Fleming
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282-1530
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Ley S, Tackett M, Maddess M, Anderson J, Brennan P, Cappi M, Heer J, Helgen C, Kori M, Kouklovsky C, Marsden S, Norman J, Osborn D, Palomero M, Pavey J, Pinel C, Robinson L, Schnaubelt J, Scott J, Spilling C, Watanabe H, Wesson K, Willis M. Total Synthesis of Rapamycin. Chemistry 2009; 15:2874-914. [DOI: 10.1002/chem.200801656] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Carter CF, Baxendale IR, O'Brien M, Pavey JBJ, Ley SV. Synthesis of acetal protected building blocks using flow chemistry with flow I.R. analysis: preparation of butane-2,3-diacetal tartrates. Org Biomol Chem 2009; 7:4594-7. [DOI: 10.1039/b917289k] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Maddess ML, Tackett MN, Ley SV. Total synthesis studies on macrocyclic pipecolic acid natural products: FK506, the antascomicins and rapamycin. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 2008; 66:13, 15-186. [PMID: 18416305 DOI: 10.1007/978-3-7643-8595-8_2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This chapter derives its inspiration from the challenges presented to total synthesis chemists, by a particular group of macrocyclic pipecolic acid natural products. Although there is considerable emphasis on the completed syntheses of the main characters (FK506 (1), the antascomycins (4 and 5) and rapamycin (7)), the overall complexity of the molecular problem has stimulated a wealth of new knowledge, including the development of novel strategies and the invention of new synthetic methods. The ingenious and innovative approaches to these targets have enabled new generations of analogues, and provided material to further probe the biology of these fascinating molecules. With pharmaceutical application as an immunosuppressant, as well as potential use for the treatment of cancer and neurodegenerative diseases, this family of natural products continues to inspire new and interesting science while providing solutions to healthcare problems of the world.
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Affiliation(s)
- Matthew L Maddess
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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Qi W, McIntosh MC. Toward the Synthesis of Antascomicin B. Synthesis of a Model of the C22-C34 Fragment via Ireland-Claisen and Allylic Diazene Rearrangements. Tetrahedron 2008; 64:7021-7025. [PMID: 19132139 DOI: 10.1016/j.tet.2008.05.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The C22-C34 fragment of antascomicin B lacking the C31 and C32 hydroxyl groups has been prepared in 11 steps from commercially available 2-OH-cyclohexanone. An Ireland-Claisen rearrangement was employed to install the C26 and C27 stereocenters. Our recently reported diastereoselective acyclic 1,3-reductive transposition was used to establish the remote C23 stereocenter. Directed hydrogenation was employed to set the C29 stereocenter. The model compound contains 5 of the stereocenters and all of the carbons of the corresponding fragment of antascomicin B.
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Affiliation(s)
- Wei Qi
- Dept. of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701
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Lence E, Castedo L, González-Bello C. The conformational rigidity of butane-1,2-diacetals as a powerful synthetic tool. Chem Soc Rev 2008; 37:1689-708. [DOI: 10.1039/b717902b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Ley SV, Sheppard TD, Myers RM, Chorghade MS. Chiral Glycolate Equivalents for the Asymmetric Synthesis of α-Hydroxycarbonyl Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1451] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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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 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
1,2-Diacetals are readily prepared, rigid structural motifs that provide a wide range of opportunities for applications in natural product assembly. These uses encompass selective 1,2-diol or alpha-hydroxy acid protection, enantiotopic recognition and desymmetrization methods, chiral memory applications, and reactivity control in oligosaccharide synthesis, as well as functioning as templating components, chiral auxiliaries, and building blocks. 1,2-Diacetals are often more stable and lead to products with enhanced crystallinity compared to their five-ring acetonide counterparts. Many 1,2-diacetals have favorable NMR parameters, which facilitate structural assignment, particularly during asymmetric reaction processes.
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Affiliation(s)
- Steven V Ley
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, U.K.
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Maddess M, Tackett M, Watanabe H, Brennan P, Spilling C, Scott J, Osborn D, Ley S. Total Synthesis of Rapamycin. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604053] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Maddess ML, Tackett MN, Watanabe H, Brennan PE, Spilling CD, Scott JS, Osborn DP, Ley SV. Total Synthesis of Rapamycin. Angew Chem Int Ed Engl 2007; 46:591-7. [PMID: 17154218 DOI: 10.1002/anie.200604053] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Matthew L Maddess
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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Organische Chemie: Ley und Yoshida ausgezeichnet / Anorganische Chemie: Christe geehrt. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Organic Chemistry: Ley and Yoshida awarded / Inorganic Chemistry: Christe honored. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/anie.200602884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Chakraborty TK, Mohan BK, Sreekanth M. Studies directed towards the synthesis of antascomicin A: stereoselective synthesis of the C22–C34 fragment of the molecule. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.05.115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Chakraborty TK, Mohan BK. Studies directed towards the synthesis of antascomicin A: stereoselective synthesis of the C1–C21 fragment of the molecule. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.05.113] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Donohoe TJ, Bataille CJR, Churchill GH. Highlights of natural product synthesis. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b515095g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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