1
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Hejna BG, Ganley JM, Shao H, Tian H, Ellefsen JD, Fastuca NJ, Houk KN, Miller SJ, Knowles RR. Catalytic Asymmetric Hydrogen Atom Transfer: Enantioselective Hydroamination of Alkenes. J Am Chem Soc 2023; 145:16118-16129. [PMID: 37432783 PMCID: PMC10544660 DOI: 10.1021/jacs.3c04591] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
We report a highly enantioselective radical-based hydroamination of enol esters with sulfonamides jointly catalyzed by an Ir photocatalyst, Brønsted base, and tetrapeptide thiol. This method is demonstrated for the formation of 23 protected β-amino-alcohol products, achieving selectivities up to 97:3 er. The stereochemistry of the product is set through selective hydrogen atom transfer from the chiral thiol catalyst to a prochiral C-centered radical. Structure-selectivity relationships derived from structural variation of both the peptide catalyst and olefin substrate provide key insights into the development of an optimal catalyst. Experimental and computational mechanistic studies indicate that hydrogen-bonding, π-π stacking, and London dispersion interactions are contributing factors for substrate recognition and enantioinduction. These findings further the development of radical-based asymmetric catalysis and contribute to the understanding of the noncovalent interactions relevant to such transformations.
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Affiliation(s)
- Benjamin G. Hejna
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Jacob M. Ganley
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Huiling Shao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Haowen Tian
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jonathan D. Ellefsen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Nicholas J. Fastuca
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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2
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Gou F, Shi D, Kou B, Li Z, Yan X, Wu X, Jiang YB. One-Pot Cyclization to Large Peptidomimetic Macrocycles by In Situ-Generated β-Turn-Enforced Folding. J Am Chem Soc 2023; 145:9530-9539. [PMID: 37037798 DOI: 10.1021/jacs.2c11684] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
Macrocycles have been targets of extensive synthetic efforts for decades because of their potent molecular recognition and self-assembly capabilities. Yet, efficient syntheses of macrocyclic molecules via irreversible covalent bonds remain challenging. Here, we report an efficient approach to large peptidomimetic macrocycles by using the in situ-generated β-turn structural motifs afforded in the amidothiourea moieties from the early steps of the reaction of 2 molecules of bilateral amino acid-based acylhydrazine with 2 molecules of diisothiocyanate. Four chiral and achiral peptidomimetic large macrocycles were successfully synthesized in high yields of 45-63% in a feasible one-pot reaction under sub-molar concentration conditions and were purified by simple filtration. X-ray crystallographic characterization of three macrocycles reveals an important feature that their four β-turn structures, each maintained by four 10-membered intramolecular hydrogen bonds, alternatively network the four aromatic arms. This affords an interesting conformation switching mode upon anion binding. Binding of SO42- to 1L or 1D that contains 4 alanine residues (with the lowest steric hinderance among the macrocycles) leads to an inside-out structural change of the host macrocycle, as confirmed by the X-ray crystal structure of 1L-SO42- and 1D-SO42- complexes, accompanied by an inversion of the CD signals. On the basis of the strong sulfate affinity of the macrocycles, we succeeded in the removal of sulfate anions from water via a macrocycle-mediated liquid-liquid extraction method. Our synthetic protocol can be easily extended to other macrocycles of varying arms and/or chiral amino acid residues; thus, a variety of structurally and functionally diverse macrocycles are expected to be readily made.
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Affiliation(s)
- Fei Gou
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Di Shi
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Bohan Kou
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Zhao Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Xiaosheng Yan
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Xin Wu
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Yun-Bao Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
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3
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Saikia J, Dharmalingam K, Anandalakshmi R, Redkar AS, Bhat VT, Ramakrishnan V. Electric field modulated peptide based hydrogel nanocatalysts. SOFT MATTER 2021; 17:9725-9735. [PMID: 34643203 DOI: 10.1039/d1sm00724f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The ability to modulate self-assembly is the key to manufacture application-oriented materials. In this study, we investigated the effect of three independent variables that can modulate the catalytic activity of self-assembling peptides. The first two variables, amino acid sequence and its stereochemistry, were examined for their specific roles in the epitaxial growth and hydrogelation properties of a series of catalytic tripeptides. We observed that aromatic π-π interactions that direct the self-assembly of designed peptides, and the catalytic properties of hydrogels, are governed by the position and chirality of the proline residue. Subsequently, the influence of the third variable, an external electric field, was also tested to confirm its catalytic efficiency for the asymmetric C-C bond-forming aldol reaction. In particular, the electric field treated pff and PFF gels showed 10 and 36% higher stereoselectivity, respectively, compared with the control. Structure-property analysis using CD and FTIR spectroscopy indicates the electric field-induced beta to non-beta conformational transition in the peptide secondary structure, which corroborates with its reduced cross-link density and fibril width, respectively. Amplitude sweep rheology of the gels suggests a decrease in the storage modulus, with increased field strength. The results showed that an electric field of optimal strength can modulate the physical characteristics of the hydrogel, which in turn is manifested in the observed difference in enantioselectivity.
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Affiliation(s)
- Jahnu Saikia
- Molecular Informatics and Design Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - K Dharmalingam
- Advanced Energy & Materials Systems Laboratory, Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India
| | - R Anandalakshmi
- Advanced Energy & Materials Systems Laboratory, Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Amay Sanjay Redkar
- Molecular Informatics and Design Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - Venugopal T Bhat
- Organic Synthesis and Catalysis Laboratory SRM Research Institute and Department of Chemistry SRM Institute of Science and Technology, Tamil Nadu 603203, India.
| | - Vibin Ramakrishnan
- Molecular Informatics and Design Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
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4
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Shi D, Cao J, Weng P, Yan X, Li Z, Jiang YB. Chalcogen bonding mediates the formation of supramolecular helices of azapeptides in crystals. Org Biomol Chem 2021; 19:6397-6401. [PMID: 34251014 DOI: 10.1039/d1ob01053k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To explore whether chalcogen bonding was able to drive the formation of supramolecular helices, alanine-based azapeptides containing a β-turn structure, with a thiophene group, respectively, incorporated in the N- or C-terminus, were employed as helical building blocks. While the former derivative formed a supramolecular M-helix via intermolecular SS chalcogen bonding in crystals, the latter formed P-helix via intermolecular SO chalcogen bonding.
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Affiliation(s)
- Di Shi
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China.
| | - Jinlian Cao
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China.
| | - Peimin Weng
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China.
| | - Xiaosheng Yan
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China.
| | - Zhao Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China.
| | - Yun-Bao Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China.
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Metrano AJ, Chinn AJ, Shugrue CR, Stone EA, Kim B, Miller SJ. Asymmetric Catalysis Mediated by Synthetic Peptides, Version 2.0: Expansion of Scope and Mechanisms. Chem Rev 2020; 120:11479-11615. [PMID: 32969640 PMCID: PMC8006536 DOI: 10.1021/acs.chemrev.0c00523] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Low molecular weight synthetic peptides have been demonstrated to be effective catalysts for an increasingly wide array of asymmetric transformations. In many cases, these peptide-based catalysts have enabled novel multifunctional substrate activation modes and unprecedented selectivity manifolds. These features, along with their ease of preparation, modular and tunable structures, and often biomimetic attributes make peptides well-suited as chiral catalysts and of broad interest. Many examples of peptide-catalyzed asymmetric reactions have appeared in the literature since the last survey of this broad field in Chemical Reviews (Chem. Rev. 2007, 107, 5759-5812). The overarching goal of this new Review is to provide a comprehensive account of the numerous advances in the field. As a corollary to this goal, we survey the many different types of catalytic reactions, ranging from acylation to C-C bond formation, in which peptides have been successfully employed. In so doing, we devote significant discussion to the structural and mechanistic aspects of these reactions that are perhaps specific to peptide-based catalysts and their interactions with substrates and/or reagents.
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Affiliation(s)
- Anthony J. Metrano
- AstraZeneca Oncology R&D, 35 Gatehouse Dr., Waltham, MA 02451, United States
| | - Alex J. Chinn
- Department of Chemistry, Princeton University, Princeton, NJ 08544, United States
| | - Christopher R. Shugrue
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Elizabeth A. Stone
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520, United States
| | - Byoungmoo Kim
- Department of Chemistry, Clemson University, Clemson, SC 29634, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520, United States
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6
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Zhang Y, Yan X, Cao J, Weng P, Miao D, Li Z, Jiang YB. Turn Conformation of β-Amino Acid-Based Short Peptides Promoted by an Amidothiourea Moiety at C-Terminus. J Org Chem 2020; 85:9844-9849. [PMID: 32584574 DOI: 10.1021/acs.joc.0c01139] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A C-terminal amidothiourea motif is shown to promote a β-turn-like folded conformation in a series of β-amino acid-based short peptides in both the solid state and solution phase by an intramolecular 11-membered ring hydrogen bond.
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Affiliation(s)
- Yanhan Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
| | - Xiaosheng Yan
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
| | - Jinlian Cao
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
| | - Peimin Weng
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
| | - Daiyu Miao
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
| | - Zhao Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
| | - Yun-Bao Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and iChEM, Xiamen University, Xiamen 361005, China
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7
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Rapp PB, Murai K, Ichiishi N, Leahy DK, Miller SJ. Catalytic Sulfamoylation of Alcohols with Activated Aryl Sulfamates. Org Lett 2020; 22:168-174. [PMID: 31833780 DOI: 10.1021/acs.orglett.9b04119] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a new catalytic method for alcohol sulfamoylation that deploys electron-deficient aryl sulfamates as activated group transfer reagents. The reaction utilizes the simple organic base N-methylimidazole, proceeds under mild conditions, and provides intrinsic selectivity for 1° over 2° alcohols (up to >40:1 for certain nucleosides). The requisite aryl sulfamate donors are stable crystalline solids that can be readily prepared on a large scale. Mechanistic considerations support the intermediacy of HNSO2 "aza-sulfene" in the transfer reaction.
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Affiliation(s)
- Peter B Rapp
- Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520-8107 , United States
| | - Koichi Murai
- Process Chemistry Development , Takeda Pharmaceuticals International Co. , Cambridge , Massachusetts 02139 , United States
| | - Naoko Ichiishi
- Process Chemistry Development , Takeda Pharmaceuticals International Co. , Cambridge , Massachusetts 02139 , United States
| | - David K Leahy
- Process Chemistry Development , Takeda Pharmaceuticals International Co. , Cambridge , Massachusetts 02139 , United States
| | - Scott J Miller
- Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520-8107 , United States
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8
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Single-handed supramolecular double helix of homochiral bis(N-amidothiourea) supported by double crossed C-I···S halogen bonds. Nat Commun 2019; 10:3610. [PMID: 31399581 PMCID: PMC6689071 DOI: 10.1038/s41467-019-11539-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 07/18/2019] [Indexed: 02/07/2023] Open
Abstract
The natural DNA double helix consists of two strands of nucleotides that are held together by multiple hydrogen bonds. Here we propose to build an artificial double helix from fragments of two strands connected by covalent linkages therein, but with halogen bonding as the driving force for self-assembling the fragments to the double helix. We succeed in building such a double helix in both solution and solid state, by using a bilateral N-(p-iodobenzoyl)alanine based amidothiourea which in its folded cis-form allows double and crossed C−I···S halogen bonds that lead to right- or left-handed double helix when the two alanine residues are of the same L,L- or D,D-configuration. The double helix forms in dilute CH3CN solution of the micromolar concentration level, e.g., 5.6 μM from 2D NOESY experiments and exhibits a high thermal stability in solution up to 75 °C, suggesting cooperative and thereby strong intermolecular double crossed halogen bonding that makes the double helix stable. This is supported by the observed homochiral self-sorting in solution. Building an artificial double helix is a compelling challenge, and most strategies rely on the intertwining of two helical strands. Here, in a very different approach, the authors construct a supramolecular double helix from multiple synthetic small molecules chained together by double crossed halogen bonds.
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Abstract
A modular and efficient synthesis of highly twisted N-acylimidazoles is reported. These twist amides were characterized via X-ray crystallography, NMR spectroscopy, IR spectroscopy, and DFT calculations. Modification of the substituent proximal to the amide revealed a maximum torsional angle of 88.6° in the solid state, which may be the most twisted amide reported for a nonbicyclic system to date. Reactivity and stability studies indicate that these twisted N-acylimidazoles may be valuable, namely as acyl transfer reagents.
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Affiliation(s)
- Elizabeth A. Stone
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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10
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Abstract
α,α-Disubstituted α-amino acids (dAAs), in which the α-hydrogen of the α-amino acid is replaced with an alkyl substituent, stabilize peptide secondary structures and have been utilized as a tool for building blocks of peptide foldamers. Peptides composed of acyclic dAAs with two bulky substituents equal to or larger than ethyl groups are more likely to form an extended planar conformation, whereas peptides with cyclic dAAs are more likely to adopt a helical structure. Based on these conformational properties of dAA-containing peptides, we developed a novel methodology using cyclic dAAs with an acetal side chain for conformational changes in peptides from a helical to a random structure with acidic treatment. Furthermore, peptide foldamers containing dAAs are useful for the design of functional peptides. In addition to the stabilization properties of peptide secondary structures, peptides foldamers exhibit resistance to degradation by proteases and thus are expected to be useful for development into bioactive peptides. In this presentation, I introduce cell-penetrating peptide foldamers as an application for dAAs in functional peptides. Peptide foldamers with appropriate functional groups at target positions show excellent, continuous cell membrane permeability and the ability to deliver biomacromolecules, such as plasmid DNA, into cells efficiently.
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Affiliation(s)
- Makoto Oba
- Graduate School of Biomedical Sciences, Nagasaki University
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11
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Shugrue CR, Sculimbrene BR, Jarvo ER, Mercado BQ, Miller SJ. Outer-Sphere Control for Divergent Multicatalysis with Common Catalytic Moieties. J Org Chem 2019; 84:1664-1672. [PMID: 30608173 PMCID: PMC6358474 DOI: 10.1021/acs.joc.8b03068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We herein report two examples of one-pot, simultaneous reactions, mediated by multiple, orthogonal catalysts with the same catalytic motif. First, BINOL-derived chiral phosphoric acids (CPA) and phosphothreonine (pThr)-embedded peptides were found to be matched for two different steps in double reductions of bisquinolines. Next, two π-methylhistidine (Pmh)-containing peptides catalyzed enantio- and chemoselective acylations and phosphorylations of multiple substrates in one pot. The selectivity exhibited by common reactive moieties is adjusted solely by the appended chiral scaffold through outer-sphere interactions.
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Affiliation(s)
- Christopher R. Shugrue
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | | | | | - Brandon Q. Mercado
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
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12
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Featherston AL, Shugrue CR, Mercado BQ, Miller SJ. Phosphothreonine (pThr)-Based Multifunctional Peptide Catalysis for Asymmetric Baeyer-Villiger Oxidations of Cyclobutanones. ACS Catal 2019; 9:242-252. [PMID: 31007966 DOI: 10.1021/acscatal.8b04132] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Biologically inspired phosphothreonine (pThr)-embedded peptides that function as chiral Brønsted acid catalysts for enantioselective Baeyer-Villiger oxidations (BV) of cyclobutanones with aqueous H2O2 are reported herein. Complementary to traditional BINOL-derived chiral phosphoric acids (CPAs), the functional diversity of the peptidic scaffold provides the opportunity for multiple points of contact with substrates via hydrogen bonding, and the ease of peptide synthesis facilitates rapid diversification of the catalyst structure, such that numerous unique peptide-based CPA catalysts have been prepared. Utilizing a hypothesis-driven design, we identified a pThr-based catalyst that contains an N-acylated diaminopropionic acid (Dap) residue, which achieves high enantioselectivity with catalyst loadings as low as 0.5 mol%. The power of peptide-based multi-site binding is further exemplified through reversal in the absolute stereochemical outcome upon repositioning of the substrate-directing group (ortho- to meta). Modifications to the i+3 residue (LDap to LPhe) lead to an observed enantiodivergence without inversion of any stereogenic center on the peptide catalyst, due to noncovalent interactions. Structure-selectivity and 1H-1H-ROESY studies revealed that the proposed hydrogen bonding interactions are essential for high levels of enantioinduction. The ability for the phosphopeptides to operate as multifunctional oxidation catalysts expands the scope of pThr catalysts and provides a framework for the future selective diversification of more complex substrates, including natural products.
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Affiliation(s)
- Aaron L. Featherston
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Christopher R. Shugrue
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
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13
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Cozett RE, Venter GA, Gokada MR, Hunter R. Catalytic enantioselective acyl transfer: the case for 4-PPY with a C-3 carboxamide peptide auxiliary based on synthesis and modelling studies. Org Biomol Chem 2018; 14:10914-10925. [PMID: 27814425 DOI: 10.1039/c6ob01991a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A series of 4-pyrrolidinopyridine (4-PPY) C-3 carboxamides containing peptide-based side chains have been synthesised and evaluated in the kinetic resolution of a small library of chiral benzylic secondary alcohols. A key design element was the incorporation of a tryptophan residue in the peptide side chain for promoting π-stacking between peptide side chain and the pyridinium ring of the N-acyl intermediate, in which modelling was used as a structure-based guiding tool. Together, a catalyst containing a LeuTrp-N-Boc side chain (catalyst 8) was identified that achieved s-values up to and in slight excess of 10. A transition-state model based on the modelling is proposed to explain the origin of enantioselectivity. This study establishes the usefulness of modelling as a structure-based guiding tool for enantioselectivity optimization as well as the potential for developing scalable peptide-based DMAP-type catalysts for large-scale resolution work.
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Affiliation(s)
- Rudy E Cozett
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa.
| | - Gerhard A Venter
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa. and Scientific Computing Research Unit, University of Cape Town, Rondebosch, 7701, South Africa
| | - Maheswara Rao Gokada
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa.
| | - Roger Hunter
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa.
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14
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Abstract
The application of small molecules as catalysts for the diversification of natural product scaffolds is reviewed. Specifically, principles that relate to the selectivity challenges intrinsic to complex molecular scaffolds are summarized. The synthesis of analogues of natural products by this approach is then described as a quintessential "late-stage functionalization" exercise wherein natural products serve as the lead scaffolds. Given the historical application of enzymatic catalysts to the site-selective alteration of complex molecules, the focus of this Review is on the recent studies of nonenzymatic catalysts. Reactions involving hydroxyl group derivatization with a variety of electrophilic reagents are discussed. C-H bond functionalizations that lead to oxidations, aminations, and halogenations are also presented. Several examples of site-selective olefin functionalizations and C-C bond formations are also included. Numerous classes of natural products have been subjected to these studies of site-selective alteration including polyketides, glycopeptides, terpenoids, macrolides, alkaloids, carbohydrates, and others. What emerges is a platform for chemical remodeling of naturally occurring scaffolds that targets virtually all known chemical functionalities and microenvironments. However, challenges for the design of very broad classes of catalysts, with even broader selectivity demands (e.g., stereoselectivity, functional group selectivity, and site-selectivity) persist. Yet, a significant spectrum of powerful, catalytic alterations of complex natural products now exists such that expansion of scope seems inevitable. Several instances of biological activity assays of remodeled natural product derivatives are also presented. These reports may foreshadow further interdisciplinary impacts for catalytic remodeling of natural products, including contributions to SAR development, mode of action studies, and eventually medicinal chemistry.
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Affiliation(s)
- Christopher R. Shugrue
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520, United States
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15
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Acylative kinetic resolution of racemic aromatic β-hydroxy esters catalyzed by chiral nucleophilic N -(1-arylethyl)benzoguanidines. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Cao J, Yan X, He W, Li X, Li Z, Mo Y, Liu M, Jiang YB. C-I···π Halogen Bonding Driven Supramolecular Helix of Bilateral N-Amidothioureas Bearing β-Turns. J Am Chem Soc 2017; 139:6605-6610. [PMID: 28135075 DOI: 10.1021/jacs.6b13171] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report the first example of C-I···π halogen bonding driven supramolecular helix in highly dilute solution of micromolar concentration, using alanine based bilateral I-substituted N-amidothioureas that contain helical fragments, the β-turn structures. The halogen bonding interactions afford head-to-tail linkages that help to propagate the helicity of the helical fragments. In support of this action of the halogen bonding, chiral amplification was observed in the supramolecular helix formed in acetonitrile solution. The present finding provides alternative tools in the design of self-assembling macromolecules.
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Affiliation(s)
- Jinlian Cao
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University , Xiamen 361005, China
| | - Xiaosheng Yan
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University , Xiamen 361005, China
| | - Wenbin He
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University , Xiamen 361005, China
| | - Xiaorui Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University , Xiamen 361005, China
| | - Zhao Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University , Xiamen 361005, China
| | - Yirong Mo
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.,Department of Chemistry, Western Michigan University , Kalamazoo, Michigan 49008, United States
| | - Maili Liu
- Wuhan Institute of Physics and Mathematics, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Chinese Academy of Sciences , Wuhan 430071, China
| | - Yun-Bao Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University , Xiamen 361005, China
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17
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Metrano A, Abascal NC, Mercado BQ, Paulson EK, Hurtley AE, Miller SJ. Diversity of Secondary Structure in Catalytic Peptides with β-Turn-Biased Sequences. J Am Chem Soc 2017; 139:492-516. [PMID: 28029251 PMCID: PMC5312972 DOI: 10.1021/jacs.6b11348] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 11/30/2022]
Abstract
X-ray crystallography has been applied to the structural analysis of a series of tetrapeptides that were previously assessed for catalytic activity in an atroposelective bromination reaction. Common to the series is a central Pro-Xaa sequence, where Pro is either l- or d-proline, which was chosen to favor nucleation of canonical β-turn secondary structures. Crystallographic analysis of 35 different peptide sequences revealed a range of conformational states. The observed differences appear not only in cases where the Pro-Xaa loop-region is altered, but also when seemingly subtle alterations to the flanking residues are introduced. In many instances, distinct conformers of the same sequence were observed, either as symmetry-independent molecules within the same unit cell or as polymorphs. Computational studies using DFT provided additional insight into the analysis of solid-state structural features. Select X-ray crystal structures were compared to the corresponding solution structures derived from measured proton chemical shifts, 3J-values, and 1H-1H-NOESY contacts. These findings imply that the conformational space available to simple peptide-based catalysts is more diverse than precedent might suggest. The direct observation of multiple ground state conformations for peptides of this family, as well as the dynamic processes associated with conformational equilibria, underscore not only the challenge of designing peptide-based catalysts, but also the difficulty in predicting their accessible transition states. These findings implicate the advantages of low-barrier interconversions between conformations of peptide-based catalysts for multistep, enantioselective reactions.
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Affiliation(s)
- Anthony
J. Metrano
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Nadia C. Abascal
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Eric K. Paulson
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Anna E. Hurtley
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
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18
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Yamada A, Nakata K. (R)-(+)-N-Methylbenzoguanidine ((R)-NMBG) catalyzed acylative kinetic resolution of racemic 3-hydroxy-3-aryl-propanoates. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Liao RZ, Santoro S, Gotsev M, Marcelli T, Himo F. Origins of Stereoselectivity in Peptide-Catalyzed Kinetic Resolution of Alcohols. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02131] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Rong-Zhen Liao
- Key
Laboratory of Material Chemistry for Energy Conversion and Storage,
Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
| | - Stefano Santoro
- Department
of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Martin Gotsev
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
| | - Tommaso Marcelli
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
| | - Fahmi Himo
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
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20
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Shugrue CR, Miller SJ. Phosphothreonine as a catalytic residue in peptide-mediated asymmetric transfer hydrogenations of 8-aminoquinolines. Angew Chem Int Ed Engl 2015; 54:11173-6. [PMID: 26246129 PMCID: PMC4628550 DOI: 10.1002/anie.201505898] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 11/10/2022]
Abstract
Phosphothreonine (pThr) was found to constitute a new class of chiral phosphoric acid (CPA) catalyst upon insertion into peptides. To demonstrate the potential of these phosphopeptides as asymmetric catalysts, enantioselective transfer hydrogenations of a previously underexplored substrate class for CPA-catalyzed reductions were carried out. pThr-containing peptides lead to the observation of enantioselectivities of up to 94:6 e.r. with 2-substituted quinolines containing C8-amino functionality. NMR studies indicate that hydrogen-bonding interactions promote strong complexation between substrates and a rigid β-turn catalyst.
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Affiliation(s)
- Christopher R Shugrue
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT 06511 (USA)
| | - Scott J Miller
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT 06511 (USA).
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21
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Shugrue CR, Miller SJ. Phosphothreonine as a Catalytic Residue in Peptide-Mediated Asymmetric Transfer Hydrogenations of 8-Aminoquinolines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505898] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Zhao Y, Gilbertson SR. Synthesis of Proline-Based N-Heterocyclic Carbene Ligands. Org Lett 2014; 16:1033-5. [DOI: 10.1021/ol403465d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yang Zhao
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Scott R. Gilbertson
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
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23
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Müller CE, Zell D, Hrdina R, Wende RC, Wanka L, Schuler SMM, Schreiner PR. Lipophilic Oligopeptides for Chemo- and Enantioselective Acyl Transfer Reactions onto Alcohols. J Org Chem 2013; 78:8465-84. [DOI: 10.1021/jo401195c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Christian E. Müller
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Daniela Zell
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Radim Hrdina
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Raffael C. Wende
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Lukas Wanka
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Sören M. M. Schuler
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
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24
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Enríquez-García A, Kündig EP. Desymmetrisation of meso-diols mediated by non-enzymatic acyl transfer catalysts. Chem Soc Rev 2013; 41:7803-31. [PMID: 23007376 DOI: 10.1039/c2cs35049a] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complementary to enzymatic methods, catalytic enantioselective desymmetrisation of meso-diols (EDMD) by small molecule catalysts has emerged as a powerful tool that provides highly enantioenriched materials of considerable value in organic synthesis. This review traces the evolution of easily accessible catalysts used in the EDMD and compares their performance with the existing enzymatic methods.
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25
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Barrett KT, Miller SJ. Enantioselective synthesis of atropisomeric benzamides through peptide-catalyzed bromination. J Am Chem Soc 2013; 135:2963-6. [PMID: 23410090 DOI: 10.1021/ja400082x] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report the enantioselective synthesis of atropisomeric benzamides employing catalytic electrophilic aromatic substitution reactions involving bromination. The catalyst is a simple tetrapeptide bearing a tertiary amine that may function as a Brønsted base. A series of tri- and dibrominations were accomplished for a range of compounds bearing differential substitution patterns. Tertiary benzamides represent appropriate substrates for the reaction since they exhibit sufficiently high barriers to racemization after ortho functionalization. Mechanism-driven experiments provided some insight into the basis for selectivity. Examination of the observed products at low conversion suggested that the initial catalytic bromination may be regioselective and stereochemistry-determining. A complex between the catalyst and substrate was observed by NMR spectroscopy, revealing a specific association. Finally, the products of these reactions may be subjected to regioselective metal-halogen exchange and trapping with I(2), setting the stage for utility.
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Affiliation(s)
- Kimberly T Barrett
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, USA
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26
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Tanaka T, Akagawa K, Mitsuda M, Kudo K. Asymmetric α-Amination of Aldehydes by a Recyclable Resin-Supported Peptide Catalyst. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Kolesinska B, Kasperowicz-Frankowska K, Fraczyk J, Kaminski ZJ. Enantioselective Solid-Phase Peptide Synthesis Using Traceless Chiral Coupling Reagents and Racemic Amino Acids. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Hu B, Meng M, Jiang S, Deng W. Kinetic Resolution of Aryl Alkenylcarbinols Catalyzed by Fc-PIP. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200410] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Akagawa K, Sugiyama M, Kudo K. Asymmetric Michael addition of boronic acids to a γ-hydroxy-α,β-unsaturated aldehyde catalyzed by resin-supported peptide. Org Biomol Chem 2012; 10:4839-43. [DOI: 10.1039/c2ob25431j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Müller CE, Schreiner PR. Organokatalytischer, enantioselektiver Acyltransfer auf racemische sowie meso-Alkohole, -Amine und -Thiole. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006128] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Müller CE, Schreiner PR. Organocatalytic Enantioselective Acyl Transfer onto Racemic as well as meso Alcohols, Amines, and Thiols. Angew Chem Int Ed Engl 2011; 50:6012-42. [DOI: 10.1002/anie.201006128] [Citation(s) in RCA: 315] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Spivey AC, Arseniyadis S. Amine, alcohol and phosphine catalysts for acyl transfer reactions. Top Curr Chem (Cham) 2011; 291:233-80. [PMID: 21494952 DOI: 10.1007/978-3-642-02815-1_25] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
An overview of the area of organocatalytic asymmetric acyl transfer processes is presented including O- and N-acylation. The material has been ordered according to the structural class of catalyst employed rather than reaction type with the intention to draw mechanistic parallels between the manner in which the various reactions are accelerated by the catalysts and the concepts employed to control transfer of chiral information from the catalyst to the substrates.
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Affiliation(s)
- Alan C Spivey
- Department of Chemistry, South Kensington Campus, Imperial College, London, SW7 2AZ, UK.
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33
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Jiao ZG, Chang XW, Ding W, Liu GJ, Song KS, Zhu NY, Zhang DW, Yang D. β NO Turns and Helices Induced by β2-Aminoxy Peptides: Synthesis and Conformational Studies. Chem Asian J 2011; 6:1791-9. [DOI: 10.1002/asia.201000933] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Indexed: 11/07/2022]
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34
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Akagawa K, Kudo K. Asymmetric Epoxidation of α,β-Unsaturated Aldehydes in Aqueous Media Catalyzed by Resin-Supported Peptide- Containing Unnatural Amino Acids. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000805] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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35
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Chen P, Qu J. Backbone Modification of β-Hairpin-Forming Tetrapeptides in Asymmetric Acyl Transfer Reactions. J Org Chem 2011; 76:2994-3004. [DOI: 10.1021/jo200403g] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peng Chen
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
| | - Jin Qu
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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36
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Cao JL, Qu J. Desymmetrization of meso-1,2-Diols via the Dynamic Kinetic Resolution of Its Monodichloroacetates. J Org Chem 2010; 75:3663-70. [DOI: 10.1021/jo100435f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Li Cao
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
| | - Jin Qu
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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37
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Leclercq L, Suisse I, Agbossou-Niedercorn F. Kinetic Resolution of Racemic Secondary Alcohols Mediated by N-Methylimidazole in the Presence of Optically Active Acyl Chlorides. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901075] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Akagawa K, Fujiwara T, Sakamoto S, Kudo K. Efficient Asymmetric α-Oxyamination of Aldehydes by Resin-Supported Peptide Catalyst in Aqueous Media. Org Lett 2010; 12:1804-7. [DOI: 10.1021/ol100415h] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kengo Akagawa
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Takuma Fujiwara
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Seiji Sakamoto
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Kazuaki Kudo
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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39
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Zhang YH, Song K, Zhu NY, Yang D. The effect of backbone stereochemistry on the folding of acyclic beta(2, 3)-aminoxy peptides. Chemistry 2010; 16:577-87. [PMID: 19876967 DOI: 10.1002/chem.200901471] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
As a new type of foldamer, beta-aminoxy peptides have the ability to adopt novel beta N--O turns or beta N--O helices in solution. Herein, we describe a new subclass of beta-aminoxy peptide, that is, peptides of acyclic beta(2, 3)-aminoxy acids (NH(2)OCHR(1)CHR(2)COOH), in which the presence of two chiral centers provides insight into the effect of backbone stereochemistry on the folding of beta-aminoxy peptides. Acyclic beta(2, 3)-aminoxy peptides with syn and anti configurations have been synthesized and their conformations investigated by NMR, IR, and circular dichroism (CD) spectroscopic, and X-ray crystallographic analysis. The beta N--O turns or beta N--O helices, which feature nine-membered rings with intramolecular hydrogen bonds and have been identified previously in peptides of beta(3)- and beta(2, 2)-aminoxy acids, are also predominantly present in the acyclic beta(2, 3)-aminoxy peptides with a syn configuration and N--O bonds gauche to the C(alpha)--C(beta) bonds in both solution and the solid state. In the acyclic beta(2, 3)-aminoxy peptides with an anti configuration, an extended strand (i.e., non-hydrogen-bonded state) is found in the solid state, and several conformations including non-hydrogen-bonded and intramolecular hydrogen-bonded states are present simultaneously in nonpolar solvents. These results suggest that the backbone stereochemistry does affect the folding of the acyclic beta(2, 3)-aminoxy peptides. Theoretical calculations on the conformations of model acyclic beta(2, 3)-aminoxy peptides with different backbone stereochemistry were also conducted to elucidate structural characteristics. Our present work may provide useful guidelines for the design and construction of new foldamers with predicable structures.
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Affiliation(s)
- Yu-Hui Zhang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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40
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Pérez de Vega MJ, García-Aranda MI, González-Muñiz R. A role for ring-closing metathesis in medicinal chemistry: Mimicking secondary architectures in bioactive peptides. Med Res Rev 2010; 31:677-715. [DOI: 10.1002/med.20199] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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41
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Abstract
While Nature excels at performing selective modifications of complex polyfunctional molecules through the use of tailoring enzymes, synthetic chemistry has lagged behind in this regard. In prior work, we have applied a biomimetic approach to this problem, developing small peptides to achieve various group transfer reactions on polyol substrates with high enantio- or regioselectivity. The utility of sulfonates as synthetic building blocks and the scarcity of direct, selective methods for their preparation prompted our investigation into this area. In this article we report the development of a pi-methyl histidine-based tetrameric peptide that effects the desymmetrization of meso-1,3-diols through enantioselective (mono)sulfonylation. The catalyst exhibits structural similarities to another catalyst found to be effective in orthogonal group transfers, but results in modification of the enantiotopic alcohol. The practical and mechanistic implications of this discovery may extend beyond synthetic considerations and provide analogies to the diverse roles of histidine in enzyme active sites.
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Affiliation(s)
- Kristin Williams Fiori
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520-8107, USA
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42
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Müller C, Zell D, Schreiner P. One-Pot Desymmetrization ofmeso-1,2-Hydrocarbon Diols through Acylation and Oxidation. Chemistry 2009; 15:9647-50. [DOI: 10.1002/chem.200901711] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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43
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Wu FC, Da CS, Du ZX, Guo QP, Li WP, Yi L, Jia YN, Ma X. N-Primary-Amine-Terminal β-Turn Tetrapeptides as Organocatalysts for Highly Enantioselective Aldol Reaction. J Org Chem 2009; 74:4812-8. [DOI: 10.1021/jo9005766] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Feng-Chun Wu
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Chao-Shan Da
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Zhi-Xue Du
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Qi-Peng Guo
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Wei-Ping Li
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Lei Yi
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Ya-Ning Jia
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
| | - Xiao Ma
- Institute of Biochemistry & Molecular Biology, School of Life Sciences, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China, and Department of Biology, Shantou University, Shantou 515063, China
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44
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Akagawa K, Akabane H, Sakamoto S, Kudo K. Asymmetric transfer hydrogenation in aqueous media catalyzed by resin-supported peptide having a polyleucine tether. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.02.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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45
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Kolesinska B, Kaminski ZJ. Design, Synthesis, and Application of Enantioselective Coupling Reagent with a Traceless Chiral Auxiliary. Org Lett 2009; 11:765-8. [DOI: 10.1021/ol802691x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Beata Kolesinska
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Zbigniew J. Kaminski
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
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Cowen BJ, Miller SJ. Enantioselective catalysis and complexity generation from allenoates. Chem Soc Rev 2009; 38:3102-16. [DOI: 10.1039/b816700c] [Citation(s) in RCA: 536] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li X, Wu YD, Yang D. Alpha-aminoxy acids: new possibilities from foldamers to anion receptors and channels. Acc Chem Res 2008; 41:1428-38. [PMID: 18785763 DOI: 10.1021/ar8001393] [Citation(s) in RCA: 168] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Naturally occurring peptides serve important functions as enzyme inhibitors, hormones, neurotransmitters, and immunomodulators in many physiological processes including metabolism, digestion, pain sensitivity, and the immune response. However, due to their conformational flexibility and poor bioavailability, such peptides are not generally viewed as useful therapeutic agents in clinical applications. In an effort to solve these problems, chemists have developed peptidomimetic foldamers, unnatural oligomeric molecules that fold into rigid and well-defined secondary structures mimicking the structures and biological functions of these natural peptides. We have designed peptidomimetic foldamers that give predictable, backbone-controlled secondary structures irrespective of the nature of the side chains. This Account presents our efforts to develop a novel class of peptidomimetic foldamers comprising alpha-aminoxy acids and explore their applications in the simulation of ion recognition and transport processes in living systems. Peptides constructed from alpha-aminoxy acids fold according to the following rules: (1) A strong intramolecular eight-membered-ring hydrogen bond forms between adjacent alpha-aminoxy acid residues (the alpha N-O turn). The chirality of the alpha-carbon, not the nature of the side chains, determines the conformation of this chiral N-O turn. (2) While homochiral oligomers of alpha-aminoxy acids form an extended helical structure (1.8 8 helix), heterochiral ones adopt a bent reverse turn structure. (3) In peptides of alternating alpha-amino acids and alpha-aminoxy acids, the seven-membered-ring intramolecular hydrogen bond, that is, the gamma-turn, is initiated by a succeeding alpha N-O turn. Thus, this type of peptide adopts a novel 7/8 helical structure. In investigating the potential applications of alpha-aminoxy acids, we have found that the amide NH units of alpha-aminoxy acids are more acidic than are regular amide NH groups, which makes them better hydrogen bond donors when interacting with anions. This property makes alpha-aminoxy acids ideal building blocks for the construction of anion receptors. Indeed, we have constructed both cyclic and acyclic anion receptors that have strong affinities and good (enantio-)selectivities toward chloride (Cl(-)) and chiral carboxylate ions. Taking advantage of these systems' preference for Cl(-) ions, we have also employed alpha-aminoxy acid units to construct a synthetic Cl(-) channel that can mediate the passage of Cl(-) ions across cell membranes. Continued studies of these peptidomimetic systems built from alpha-aminoxy acids should lead to a broad range of applications in chemistry, biology, medicine, and materials science.
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Affiliation(s)
- Xiang Li
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yun-Dong Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Dan Yang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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Laungani AC, Slattery JM, Krossing I, Breit B. Supramolecular bidentate ligands by metal-directed in situ formation of antiparallel beta-sheet structures and application in asymmetric catalysis. Chemistry 2008; 14:4488-502. [PMID: 18449870 DOI: 10.1002/chem.200800359] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The principles of protein structure design, molecular recognition, and supramolecular and combinatorial chemistry have been applied to develop a convergent metal-ion-assisted self-assembly approach that is a very simple and effective method for the de novo design and the construction of topologically predetermined antiparallel beta-sheet structures and self-assembled catalysts. A new concept of in situ generation of bidentate P-ligands for transition-metal catalysis, in which two complementary, monodentate, peptide-based ligands are brought together by employing peptide secondary structure motif as constructing tool to direct the self-assembly process, is achieved through formation of stable beta-sheet motifs and subsequent control of selectivity. The supramolecular structures were studied by (1)H, (31)P, and (13)C NMR spectroscopy, ESI mass spectrometry, X-ray structure analysis, and theoretical calculations. Our initial catalysis results confirm the close relationship between the self-assembled sheet conformations and the catalytic activity of these metallopeptides in the asymmetric rhodium-catalyzed hydroformylation. Good catalyst activity and moderate enantioselectivity were observed for the selected combination of catalyst and substrate, but most importantly the concept of this new methodology was successfully proven. This work presents a perspective interface between protein design and supramolecular catalysis for the design of beta-sheet mimetics and screening of libraries of self-organizing supramolecular catalysts.
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Affiliation(s)
- Andy C Laungani
- Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
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Akagawa K, Akabane H, Sakamoto S, Kudo K. Organocatalytic Asymmetric Transfer Hydrogenation in Aqueous Media Using Resin-Supported Peptide Having a Polyleucine Tether. Org Lett 2008; 10:2035-7. [DOI: 10.1021/ol800031p] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kengo Akagawa
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Hajime Akabane
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Seiji Sakamoto
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Kazuaki Kudo
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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Davie EAC, Mennen SM, Xu Y, Miller SJ. Asymmetric catalysis mediated by synthetic peptides. Chem Rev 2008; 107:5759-812. [PMID: 18072809 DOI: 10.1021/cr068377w] [Citation(s) in RCA: 510] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elizabeth A Colby Davie
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, USA.
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