1
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Shaham-Niv S, Ezra A, Zaguri D, Shotan SR, Haimov E, Engel H, Brider T, Simhaev L, Barr HM, Adler-Abramovich L, Gazit E. Targeting phenylalanine assemblies as a prospective disease-modifying therapy for phenylketonuria. Biophys Chem 2024; 308:107215. [PMID: 38432113 DOI: 10.1016/j.bpc.2024.107215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/16/2024] [Accepted: 02/25/2024] [Indexed: 03/05/2024]
Abstract
Phenylketonuria is characterized by the accumulation of phenylalanine, resulting in severe cognitive and neurological disorders if not treated by a remarkably strict diet. There are two approved drugs today, yet both provide only a partial solution. We have previously demonstrated the formation of amyloid-like toxic assemblies by aggregation of phenylalanine, suggesting a new therapeutic target to be further pursued. Moreover, we showed that compounds that halt the formation of these assemblies also prevent their resulting toxicity. Here, we performed high-throughput screening, searching for compounds with inhibitory effects on phenylalanine aggregation. Morin hydrate, one of the most promising hits revealed during the screen, was chosen to be tested in vivo using a phenylketonuria mouse model. Morin hydrate significantly improved cognitive and motor function with a reduction in the number of phenylalanine brain deposits. Moreover, while phenylalanine levels remained high, we observed a recovery in dopaminergic, adrenergic, and neuronal markers. To conclude, the ability of Morin hydrate to halt phenylalanine aggregation without reducing phenylalanine levels implies the toxic role of the phenylalanine assemblies in phenylketonuria and opens new avenues for disease-modifying treatment.
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Affiliation(s)
- Shira Shaham-Niv
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 6997801, Israel; BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Assaf Ezra
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Dor Zaguri
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Stav Roni Shotan
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Elvira Haimov
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Hamutal Engel
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Tamara Brider
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Luba Simhaev
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Haim Michael Barr
- Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lihi Adler-Abramovich
- Department of Oral Biology, The Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ehud Gazit
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 6997801, Israel; BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel.
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2
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Katzir I, Haimov E, Lampel A. Tuning the Dynamics of Viral-Factories-Inspired Compartments Formed by Peptide-RNA Liquid-Liquid Phase Separation. Adv Mater 2022; 34:e2206371. [PMID: 36134527 DOI: 10.1002/adma.202206371] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Viral factories are intracellular microcompartments formed by mammalian viruses in their host cells, and contain necessary machinery for viral genome replication, capsid assembly, and maturation, thus serving as "factories" for formation of new viral particles. Recent evidence suggests that these compartments are formed by liquid-liquid phase separation (LLPS) of viral proteins and nucleic acids and present dynamic properties. In this work, inspired by the remarkable functionalities of viral factories, dynamic compartments that are formed by complexation between a minimalistic, disordered peptide and RNA are designed. By systematic studies using sequence variants it is shown that the material properties of the compartments can be modulated by changes to the peptide sequence, at the single amino acid level. Moreover, by taking this approach to the next step, liquid compartments with light-induced tunable dynamics are developed. The results demonstrate that the material properties of liquid droplets can be temporally regulated by increasing peptide polarity and charge, and that these changes can be further utilized for controlled partitioning and release of payloads from the compartments.
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Affiliation(s)
- Itai Katzir
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Elvira Haimov
- Blavatnik Center for Drug Discovery, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Ayala Lampel
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv, 69978, Israel
- Sagol Center for Regenerative Biotechnology, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for the Physics and Chemistry of Living Systems, Tel Aviv University, Tel Aviv, 69978, Israel
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3
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Abstract
LPtIVF(Aryl) complexes bearing a bulky bidentate 2‐[bis(adamant‐1‐yl)phosphino]phenoxide ligand (L) demonstrate excellent reactivity and selectivity in the arylation of X−H (X=S, N) bonds of amino acid residues in unprotected peptides under mild, including aqueous, conditions. Stepwise addition of these complexes allowed a convenient one‐pot introduction of different aromatic groups in the X−H bonds of Cys and N terminus. PtIV reagents can also be used to further arylate N−H bonds in Lys and Trp providing access to peptides bearing multiple aromatic groups.
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Affiliation(s)
- Xiaoxi Lin
- School of Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Elvira Haimov
- Blavatnik Center for Drug Discovery, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Boris Redko
- Blavatnik Center for Drug Discovery, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Arkadi Vigalok
- School of Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
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4
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Lin X, Haimov E, Redko B, Vigalok A. Selective Stepwise Arylation of Unprotected Peptides by Pt
IV
Complexes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xiaoxi Lin
- School of Chemistry The Sackler Faculty of Exact Sciences Tel Aviv University Tel Aviv 69978 Israel
| | - Elvira Haimov
- Blavatnik Center for Drug Discovery Tel Aviv University Tel Aviv 69978 Israel
| | - Boris Redko
- Blavatnik Center for Drug Discovery Tel Aviv University Tel Aviv 69978 Israel
| | - Arkadi Vigalok
- School of Chemistry The Sackler Faculty of Exact Sciences Tel Aviv University Tel Aviv 69978 Israel
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5
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Giladi M, Lisnyansky Bar-El M, Vaňková P, Ferofontov A, Melvin E, Alkaderi S, Kavan D, Redko B, Haimov E, Wiener R, Man P, Haitin Y. Structural basis for long-chain isoprenoid synthesis by cis-prenyltransferases. Sci Adv 2022; 8:eabn1171. [PMID: 35584224 PMCID: PMC9116609 DOI: 10.1126/sciadv.abn1171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 04/01/2022] [Indexed: 06/15/2023]
Abstract
Isoprenoids are synthesized by the prenyltransferase superfamily, which is subdivided according to the product stereoisomerism and length. In short- and medium-chain isoprenoids, product length correlates with active site volume. However, enzymes synthesizing long-chain products and rubber synthases fail to conform to this paradigm, because of an unexpectedly small active site. Here, we focused on the human cis-prenyltransferase complex (hcis-PT), residing at the endoplasmic reticulum membrane and playing a crucial role in protein glycosylation. Crystallographic investigation of hcis-PT along the reaction cycle revealed an outlet for the elongating product. Hydrogen-deuterium exchange mass spectrometry analysis showed that the hydrophobic active site core is flanked by dynamic regions consistent with separate inlet and outlet orifices. Last, using a fluorescence substrate analog, we show that product elongation and membrane association are closely correlated. Together, our results support direct membrane insertion of the elongating isoprenoid during catalysis, uncoupling active site volume from product length.
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Affiliation(s)
- Moshe Giladi
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
- Tel Aviv Sourasky Medical Center, Tel Aviv 6423906, Israel
| | - Michal Lisnyansky Bar-El
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Pavla Vaňková
- Institute of Microbiology of the Czech Academy of Sciences, Division BioCeV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Alisa Ferofontov
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Emelia Melvin
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Suha Alkaderi
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Daniel Kavan
- Institute of Microbiology of the Czech Academy of Sciences, Division BioCeV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Boris Redko
- Blavatnik Center for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Elvira Haimov
- Blavatnik Center for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Reuven Wiener
- Department of Biochemistry and Molecular Biology, IMRIC, Hadassah Medical School, The Hebrew University, Jerusalem 9112001, Israel
| | - Petr Man
- Institute of Microbiology of the Czech Academy of Sciences, Division BioCeV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Yoni Haitin
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 6997801, Israel
- Sagol School of Neuroscience, Tel Aviv University, Tel Aviv 6997801, Israel
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6
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Adsi H, Levkovich SA, Haimov E, Kreiser T, Meli M, Engel H, Simhaev L, Karidi-Heller S, Colombo G, Gazit E, Laor Bar-Yosef D. Chemical Chaperones Modulate the Formation of Metabolite Assemblies. Int J Mol Sci 2021; 22:9172. [PMID: 34502079 PMCID: PMC8431448 DOI: 10.3390/ijms22179172] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 08/18/2021] [Accepted: 08/19/2021] [Indexed: 11/16/2022] Open
Abstract
The formation of amyloid-like structures by metabolites is associated with several inborn errors of metabolism (IEMs). These structures display most of the biological, chemical and physical properties of protein amyloids. However, the molecular interactions underlying the assembly remain elusive, and so far, no modulating therapeutic agents are available for clinical use. Chemical chaperones are known to inhibit protein and peptide amyloid formation and stabilize misfolded enzymes. Here, we provide an in-depth characterization of the inhibitory effect of osmolytes and hydrophobic chemical chaperones on metabolite assemblies, thus extending their functional repertoire. We applied a combined in vivo-in vitro-in silico approach and show their ability to inhibit metabolite amyloid-induced toxicity and reduce cellular amyloid content in yeast. We further used various biophysical techniques demonstrating direct inhibition of adenine self-assembly and alteration of fibril morphology by chemical chaperones. Using a scaffold-based approach, we analyzed the physiochemical properties of various dimethyl sulfoxide derivatives and their role in inhibiting metabolite self-assembly. Lastly, we employed whole-atom molecular dynamics simulations to elucidate the role of hydrogen bonds in osmolyte inhibition. Our results imply a dual mode of action of chemical chaperones as IEMs therapeutics, that could be implemented in the rational design of novel lead-like molecules.
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Affiliation(s)
- Hanaa Adsi
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
| | - Shon A. Levkovich
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
| | - Elvira Haimov
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
| | - Topaz Kreiser
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
| | | | - Hamutal Engel
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
| | - Luba Simhaev
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
| | - Shai Karidi-Heller
- The Future Scientists Center–Alpha Program at Tel Aviv Youth University, Tel Aviv 6997801, Israel;
| | - Giorgio Colombo
- SCITEC-CNR, via Mario Bianco 9, 20131 Milano, Italy; (M.M.); (G.C.)
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Ehud Gazit
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
- Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Dana Laor Bar-Yosef
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
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7
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Chen Y, Yang Y, Orr AA, Makam P, Redko B, Haimov E, Wang Y, Shimon LJW, Rencus‐Lazar S, Ju M, Tamamis P, Dong H, Gazit E. Self‐Assembled Peptide Nano‐Superstructure towards Enzyme Mimicking Hydrolysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105830] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Chen
- The Shmunis School of Biomedicine and Cancer Research Tel Aviv University Israel
| | - Yuqin Yang
- Kuang Yaming Honors School & Institute for Brain Sciences Nanjing University China
| | - Asuka A. Orr
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station TX USA
| | - Pandeeswar Makam
- Department of Chemistry Indian Institute of Technology (BHU) Varanasi UP-221005 India
| | - Boris Redko
- BLAVATNIK CENTER for Drug Discovery Tel Aviv University Israel
| | - Elvira Haimov
- BLAVATNIK CENTER for Drug Discovery Tel Aviv University Israel
| | - Yannan Wang
- National & Local Joint Engineering Research Center on Biomass Resource Utilization Nankai University China
| | - Linda J. W. Shimon
- Department of Chemical Research Support Weizmann Institute of Science Rehovot Israel
| | - Sigal Rencus‐Lazar
- The Shmunis School of Biomedicine and Cancer Research Tel Aviv University Israel
| | - Meiting Ju
- National & Local Joint Engineering Research Center on Biomass Resource Utilization Nankai University China
| | - Phanourios Tamamis
- Artie McFerrin Department of Chemical Engineering Texas A&M University College Station TX USA
| | - Hao Dong
- Kuang Yaming Honors School & Institute for Brain Sciences Nanjing University China
| | - Ehud Gazit
- The Shmunis School of Biomedicine and Cancer Research Tel Aviv University Israel
- Department of Materials Science and Engineering Tel Aviv University Israel
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8
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Chen Y, Yang Y, Orr AA, Makam P, Redko B, Haimov E, Wang Y, Shimon LJW, Rencus-Lazar S, Ju M, Tamamis P, Dong H, Gazit E. Self-Assembled Peptide Nano-Superstructure towards Enzyme Mimicking Hydrolysis. Angew Chem Int Ed Engl 2021; 60:17164-17170. [PMID: 34014019 DOI: 10.1002/anie.202105830] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Indexed: 12/15/2022]
Abstract
The structural arrangement of amino acid residues in native enzymes underlies their remarkable catalytic properties, thus providing a notable point of reference for designing potent yet simple biomimetic catalysts. Herein, we describe a minimalistic approach to construct a dipeptide-based nano-superstructure with enzyme-like activity. The self-assembled biocatalyst comprises one peptide as a single building block, readily synthesized from histidine. Through coordination with zinc ion, the peptide self-assembly procedure allows the formation of supramolecular β-sheet ordered nanocrystals, which can be used as basic units to further construct higher-order superstructure. As a result, remarkable hydrolysis activity and enduring stability are demonstrated. Our work exemplifies the use of a bioinspired supramolecular assembly approach to develop next-generation biocatalysts for biotechnological applications.
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Affiliation(s)
- Yu Chen
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Israel
| | - Yuqin Yang
- Kuang Yaming Honors School & Institute for Brain Sciences, Nanjing University, China
| | - Asuka A Orr
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, USA
| | - Pandeeswar Makam
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, UP-221005, India
| | - Boris Redko
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Israel
| | - Elvira Haimov
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Israel
| | - Yannan Wang
- National & Local Joint Engineering Research Center on Biomass Resource Utilization, Nankai University, China
| | - Linda J W Shimon
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel
| | - Sigal Rencus-Lazar
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Israel
| | - Meiting Ju
- National & Local Joint Engineering Research Center on Biomass Resource Utilization, Nankai University, China
| | - Phanourios Tamamis
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, USA
| | - Hao Dong
- Kuang Yaming Honors School & Institute for Brain Sciences, Nanjing University, China
| | - Ehud Gazit
- The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Israel.,Department of Materials Science and Engineering, Tel Aviv University, Israel
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9
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10
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Affiliation(s)
| | | | - Elvira Haimov
- Luxembourg BioTechnologies, 8 Sapir
Pinhas St., Nes Ziona 7403631, Israel
| | - Ayman El-Faham
- Department
of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt
- Department
of Organic Chemistry, University of Barcelona, Martí i Franqués 1-11, 08028 Barcelona, Spain
| | | | - Fernando Albericio
- Department
of Organic Chemistry, University of Barcelona, Martí i Franqués 1-11, 08028 Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, Baldiri
Reixac 10, 08028 Barcelona, Spain
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11
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Haimov E, Nairoukh Z, Shterenberg A, Berkovitz T, Jamison TF, Marek I. Stereoselective Formation of Fully Substituted Ketone Enolates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601883] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Elvira Haimov
- The Mallat Family Laboratory of Organic Chemistry Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - Zackaria Nairoukh
- The Mallat Family Laboratory of Organic Chemistry Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - Alexander Shterenberg
- The Mallat Family Laboratory of Organic Chemistry Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - Tiran Berkovitz
- The Mallat Family Laboratory of Organic Chemistry Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - Timothy F. Jamison
- Massachusetts Institute of Technology Department of Chemistry 77 Massachusetts Ave., Bldg 18–590 Cambridge MA 02139 USA
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200009 Israel
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12
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Haimov E, Nairoukh Z, Shterenberg A, Berkovitz T, Jamison TF, Marek I. Stereoselective Formation of Fully Substituted Ketone Enolates. Angew Chem Int Ed Engl 2016; 55:5517-20. [PMID: 27027778 DOI: 10.1002/anie.201601883] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Indexed: 12/31/2022]
Abstract
The application of stereochemically defined acyclic fully substituted enolates of ketones to the enantioselective synthesis of quaternary carbon stereocenters would be highly valuable. Herein, we describe an approach leading to the formation of several new stereogenic centers through a combined metalation-addition of a carbonyl-carbamoyl transfer to reveal in situ stereodefined α,α-disubstituted enolates of ketone as a single stereoisomer. This approach could produce a series of aldol and Mannich products from enol carbamate with excellent diastereomeric ratios.
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Affiliation(s)
- Elvira Haimov
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Zackaria Nairoukh
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Alexander Shterenberg
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Tiran Berkovitz
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Timothy F Jamison
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave., Bldg 18-590, Cambridge, MA, 02139, USA
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry and Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel.
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