1
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Passley KD, Ruble JC, Kerr MS, Organ MG. A General Approach to Optically Pure, α-Methyl Non-Natural Amino Acids: Enabling Unique Peptides as Drug Candidates. J Org Chem 2024; 89:3211-3213. [PMID: 38333986 DOI: 10.1021/acs.joc.3c02677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
An α-methyl, non-natural amino acid (NNAA) building block equipped with an alkyl halide tail that could be readily transformed into an organozinc was prepared. This single organometallic was cross-coupled to an array of heterocyclic electrophiles using the Pd-PEPPSI-IHeptCl catalyst to produce a wide selection of optically pure α-methyl NNAAs. With these in hand, non-natural peptides are being produced for evaluation in a variety of therapeutic areas in drug discovery.
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Affiliation(s)
- Kyle D Passley
- Centre for Catalysis Research and Innovation (CCRI), Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - J Craig Ruble
- Discovery Chemistry Research and Technologies, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Mark S Kerr
- Synthetic Molecule Design and Development, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Michael G Organ
- Centre for Catalysis Research and Innovation (CCRI), Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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2
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Nerurkar A, Nguyen T, Wang S, Bhatt U, Li K, Li Y, Ding P, Seidl FJ, Holan M, Lee J, Widjaja T, Wei ZL, Sadlowski C, Sperandio D, McGee LR, Youngblood B, Schwartz N, Gehlert D, Medina JC. Novel series of tunable µOR modulators with enhanced brain penetration for the treatment of opioid use disorder, pain and neuropsychiatric indications. Bioorg Med Chem Lett 2023; 92:129405. [PMID: 37414346 PMCID: PMC10529836 DOI: 10.1016/j.bmcl.2023.129405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/23/2023] [Accepted: 07/02/2023] [Indexed: 07/08/2023]
Abstract
Structural optimization of a previously reported agonist of µOR, PZM21 is described resulting in the discovery of a novel series of amides with at least 4-folds enhanced CNS penetration in rat. Furthermore, these efforts yielded compounds with varying levels of efficacy on the receptor ranging from high efficacy agonists such as compound 20 to antagonists, such as 24. The correlation between in vitro activation of µOR and relative activity in models of analgesia for these compounds is discussed. The compelling results obtained in these studies demonstrate the potential utility of these newly discovered compounds in the treatment of pain and opioid use disorder.
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Affiliation(s)
- Alok Nerurkar
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Thomas Nguyen
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Sheldon Wang
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Ulhas Bhatt
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Kevin Li
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Yihong Li
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Pingyu Ding
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Frederick J Seidl
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Martin Holan
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - John Lee
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Tien Widjaja
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Zhi-Liang Wei
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Corinne Sadlowski
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - David Sperandio
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | - Lawrence R McGee
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA
| | | | - Neil Schwartz
- Epiodyne, 953 Indiana St. San Francisco, CA 94107, USA
| | | | - Julio C Medina
- R2M Pharma, Inc., 600 Gateway Blvd. Suite 100, South San Francisco, CA 94080, USA.
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3
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Brittain WDG, Lloyd CM, Cobb SL. Synthesis of complex unnatural fluorine-containing amino acids. J Fluor Chem 2020; 239:109630. [PMID: 33144742 PMCID: PMC7583769 DOI: 10.1016/j.jfluchem.2020.109630] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/12/2020] [Accepted: 08/12/2020] [Indexed: 01/01/2023]
Abstract
The area of fluorinated amino acid synthesis has seen rapid growth over the past decade. As reports of singly fluorinated natural amino acid derivatives have grown, researchers have turned their attention to develop methodology to access complex proteinogenic examples. A variety of reaction conditions have been employed in this area, exploiting new advances in the wider synthetic community such as photocatalysis and palladium cross-coupling. In addition, novel fluorinated functional groups have also been incorporated into amino acids, with SFX and perfluoro moieties now appearing with more frequency in the literature. This review focuses on synthetic methodology for accessing complex non-proteinogenic amino acids, along with amino acids containing multiple fluorine atoms such as CF3, SF5 and perfluoroaromatic groups.
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Affiliation(s)
| | - Carissa M Lloyd
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
| | - Steven L Cobb
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
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4
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Awad LF, Ayoup MS. Fluorinated phenylalanines: synthesis and pharmaceutical applications. Beilstein J Org Chem 2020; 16:1022-1050. [PMID: 32509033 PMCID: PMC7237815 DOI: 10.3762/bjoc.16.91] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 04/27/2020] [Indexed: 01/04/2023] Open
Abstract
Recent advances in the chemistry of peptides containing fluorinated phenylalanines (Phe) represents a hot topic in drug research over the last few decades. ᴅ- or ʟ-fluorinated phenylalanines have had considerable industrial and pharmaceutical applications and they have been expanded also to play an important role as potential enzyme inhibitors as well as therapeutic agents and topography imaging of tumor ecosystems using PET. Incorporation of fluorinated aromatic amino acids into proteins increases their catabolic stability especially in therapeutic proteins and peptide-based vaccines. This review seeks to summarize the different synthetic approaches in the literature to prepare ᴅ- or ʟ-fluorinated phenylalanines and their pharmaceutical applications with a focus on published synthetic methods that introduce fluorine into the phenyl, the β-carbon or the α-carbon of ᴅ-or ʟ-phenylalanines.
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Affiliation(s)
- Laila Fathy Awad
- Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria, 21321, Egypt
| | - Mohammed Salah Ayoup
- Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria, 21321, Egypt
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5
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Dardir AH, Hazari N, Miller SJ, Shugrue CR. Palladium-Catalyzed Suzuki-Miyaura Reactions of Aspartic Acid Derived Phenyl Esters. Org Lett 2019; 21:5762-5766. [PMID: 31290674 DOI: 10.1021/acs.orglett.9b02214] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Transition-metal-catalyzed transformations of amino acids and peptides could provide a powerful method for their site-selective modification. Here, we report non-decarbonylative Pd-catalyzed Suzuki-Miyaura reactions of phenyl ester derivatives of aspartic acid to form aryl-amino ketones. These products are potentially important in the synthesis of pharmaceuticals, and our methodology represents a new route to access molecules of this type.
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Affiliation(s)
- Amira H Dardir
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
| | - Nilay Hazari
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
| | - Scott J Miller
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
| | - Christopher R Shugrue
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
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6
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Kotha S, Todeti S. Synthesis of C 3-symmetric star-shaped molecules containing α-amino acids and dipeptides via Negishi coupling as a key step. Beilstein J Org Chem 2019; 15:371-377. [PMID: 30800186 PMCID: PMC6369998 DOI: 10.3762/bjoc.15.33] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 01/21/2019] [Indexed: 12/23/2022] Open
Abstract
We demonstrate a new synthetic strategy toward star-shaped C3-symmetric molecules containing α-amino acid (AAA) derivatives and dipeptides. In this regard, trimerization and Negishi cross-coupling reactions are used as the key steps starting from readily available 4’-iodoacetophenone and L-serine. These C3-symmetric molecules containing AAA moieties are useful to design new ligands suitable for asymmetric synthesis and peptide dendrimers.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400076, India
| | - Saidulu Todeti
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400076, India
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7
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Brittain WDG, Cobb SL. Negishi cross-couplings in the synthesis of amino acids. Org Biomol Chem 2018; 16:10-20. [PMID: 29199315 DOI: 10.1039/c7ob02682j] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The Negishi cross-coupling is a powerful C-C bond-forming reaction widely utilised in many areas of organic synthesis. This review details the use of Negishi cross-couplings in the synthesis of unnatural amino acids. The application of this reaction in the preparation of aromatic, heteroaromatic, and, complex amino acid derivatives are reviewed and presented herein.
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Affiliation(s)
| | - Steven L Cobb
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK.
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8
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Hudson AS, Caron L, Colgin N, Cobb SL. A direct method for the synthesis of orthogonally protected furyl- and thienyl- amino acids. Amino Acids 2015; 47:779-85. [PMID: 25583604 DOI: 10.1007/s00726-014-1908-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 12/19/2014] [Indexed: 10/24/2022]
Abstract
The synthesis of unnatural amino acids plays a key part in expanding the potential application of peptide-based drugs and in the total synthesis of peptide natural products. Herein, we report a direct method for the synthesis of orthogonally protected 5-membered heteroaromatic amino acids.
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Affiliation(s)
- Alex S Hudson
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
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9
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Szcześniak P, Stecko S. An approach to asymmetric synthesis of β-aryl alanines by Pd(0)-catalyzed cross-coupling and cyanate-to-isocyanate rearrangement. RSC Adv 2015. [DOI: 10.1039/c5ra02818c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new method for the asymmetric synthesis of β-aryl alanines is reported.
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Affiliation(s)
- Piotr Szcześniak
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Sebastian Stecko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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10
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Foster JA, Edkins RM, Cameron GJ, Colgin N, Fucke K, Ridgeway S, Crawford AG, Marder TB, Beeby A, Cobb SL, Steed JW. Blending gelators to tune gel structure and probe anion-induced disassembly. Chemistry 2014; 20:279-91. [PMID: 24302604 PMCID: PMC3994942 DOI: 10.1002/chem.201303153] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Indexed: 11/08/2022]
Abstract
Blending different low molecular weight gelators (LMWGs) provides a convenient route to tune the properties of a gel and incorporate functionalities such as fluorescence. Blending a series of gelators having a common bis-urea motif, and functionalised with different amino acid-derived end-groups and differing length alkylene spacers is reported. Fluorescent gelators incorporating 1- and 2-pyrenyl moieties provide a probe of the mixed systems alongside structural and morphological data from powder diffraction and electron microscopy. Characterisation of the individual gelators reveals that although the expected α-urea tape motif is preserved, there is considerable variation in the gelation properties, molecular packing, fibre morphology and rheological behaviour. Mixing of the gelators revealed examples in which: 1) the gels formed separate, orthogonal networks maintaining their own packing and morphology, 2) the gels blended together into a single network, either adopting the packing and morphology of one gelator, or 3) a new structure not seen for either of the gelators individually was created. The strong binding of the urea functionalities to anions was exploited as a means of breaking down the gel structure, and the use of fluorescent gel blends provides new insights into anion-mediated gel dissolution.
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Affiliation(s)
- Jonathan A Foster
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Robert M Edkins
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Gary J Cameron
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Neil Colgin
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Katharina Fucke
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Sam Ridgeway
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Andrew G Crawford
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg97074 Würzburg (Germany)
| | - Andrew Beeby
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Steven L Cobb
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
| | - Jonathan W Steed
- Department of Chemistry, University of DurhamSouth Road, Durham, DH1 3LE (UK)
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11
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Majumdar S, De J, Chakraborty A, Maiti DK. General solvent-free highly selective N-tert-butyloxycarbonylation strategy using protic ionic liquid as an efficient catalyst. RSC Adv 2014. [DOI: 10.1039/c4ra02670e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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12
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Usuki T, Yanuma H, Hayashi T, Yamada H, Suzuki N, Masuyama Y. Improved Negishi Cross-Coupling Reactions of an Organozinc Reagent Derived froml-Aspartic Acid with Monohalopyridines. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1807] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Toyonobu Usuki
- Department of Materials and Life Sciences, Faculty of Science and Technology; Sophia University; 7-1 Kioicho, Chiyoda-ku Tokyo 102-8554 Japan
| | - Hiroto Yanuma
- Department of Materials and Life Sciences, Faculty of Science and Technology; Sophia University; 7-1 Kioicho, Chiyoda-ku Tokyo 102-8554 Japan
| | - Takahiro Hayashi
- Department of Materials and Life Sciences, Faculty of Science and Technology; Sophia University; 7-1 Kioicho, Chiyoda-ku Tokyo 102-8554 Japan
| | - Haruka Yamada
- Department of Materials and Life Sciences, Faculty of Science and Technology; Sophia University; 7-1 Kioicho, Chiyoda-ku Tokyo 102-8554 Japan
| | - Noriyuki Suzuki
- Department of Materials and Life Sciences, Faculty of Science and Technology; Sophia University; 7-1 Kioicho, Chiyoda-ku Tokyo 102-8554 Japan
| | - Yoshiro Masuyama
- Department of Materials and Life Sciences, Faculty of Science and Technology; Sophia University; 7-1 Kioicho, Chiyoda-ku Tokyo 102-8554 Japan
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13
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Wu WY, Lin TC, Takahashi T, Tsai FY, Mou CY. A Palladium Bipyridyl Complex Grafted onto Nanosized MCM-41 as a Heterogeneous Catalyst for Negishi Coupling. ChemCatChem 2012. [DOI: 10.1002/cctc.201200388] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Geographic variability and anti-staphylococcal activity of the chrysophaentins and their synthetic fragments. Mar Drugs 2012; 10:1103-1125. [PMID: 22822360 PMCID: PMC3397459 DOI: 10.3390/md10051103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2012] [Revised: 05/05/2012] [Accepted: 05/07/2012] [Indexed: 11/16/2022] Open
Abstract
Drug-resistant Staphylococcus aureus is a continuing public health concern, both in the hospital and community settings. Antibacterial compounds that possess novel structural scaffolds and are effective against multiple S. aureus strains, including current drug-resistant ones, are needed. Previously, we have described the chrysophaentins, a family of bisdiarylbutene macrocycles from the chrysophyte alga Chrysophaeum taylori that inhibit the growth of S. aureus and methicillin-resistant S. aureus (MRSA). In this study we have analyzed the geographic variability of chrysophaentin production in C. taylori located at different sites on the island of St. John, U.S. Virgin Islands, and identified two new linear chrysophaentin analogs, E2 and E3. In addition, we have expanded the structure activity relationship through synthesis of fragments comprising conserved portions of the chrysophaentins, and determined the antimicrobial activity of natural chrysophaentins and their synthetic analogs against five diverse S. aureus strains. We find that the chrysophaentins show similar activity against all S. aureus strains, regardless of their drug sensitivity profiles. The synthetic chrysophaentin fragments indeed mimic the natural compounds in their spectrum of antibacterial activity, and therefore represent logical starting points for future medicinal chemistry studies of the natural products and their analogs.
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15
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Zalesskiy SS, Ananikov VP. Pd2(dba)3 as a Precursor of Soluble Metal Complexes and Nanoparticles: Determination of Palladium Active Species for Catalysis and Synthesis. Organometallics 2012. [DOI: 10.1021/om201217r] [Citation(s) in RCA: 213] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sergey S. Zalesskiy
- Zelinsky Institute
of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
| | - Valentine P. Ananikov
- Zelinsky Institute
of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
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16
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Eerland MF, Hedberg C. Design and synthesis of an Fmoc-SPPS-compatible amino acid building block mimicking the transition state of phosphohistidine phosphatase. J Org Chem 2012; 77:2047-52. [PMID: 22283371 DOI: 10.1021/jo2025702] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of a sulfonamide-based transition-state (TS) analogue of enzymatic phosphohistidine dephosphorylation as an amino acid building block is presented, together with the proof-of-concept of its incorporation into peptides. Key features include final global acidolytic protective group removal as well as full compatibility with standard Fmoc solid-phase peptide synthesis (SPPS). The peptides are designed as inhibitors of phosphohistidine phosphatase and as a pull-down probe for identification of phosphohistidine phosphatases, respectively.
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Affiliation(s)
- Martijn F Eerland
- Department of Chemical Biology, Max Planck Institute for Molecular Physiology, Otto-Hahn Strasse 11, Dortmund D-44227, Germany
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17
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18
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Tanaka M, Hikawa H, Yokoyama Y. Convenient synthesis of chiral tryptophan derivatives using Negishi cross-coupling. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Fenster E, Fehl C, Aubé J. Use of a tandem Prins/Friedel-Crafts reaction in the construction of the indeno-tetrahydropyridine core of the haouamine alkaloids: formal synthesis of (-)-haouamine A. Org Lett 2011; 13:2614-7. [PMID: 21517105 DOI: 10.1021/ol200725m] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A tandem Prins/Friedel-Crafts reaction useful for the construction of the indeno-tetrahydropyridine core of the haouamine alkaloids and a formal synthesis of (-)-haouamine A are described.
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Affiliation(s)
- Erik Fenster
- KU Chemical Methodologies and Library Development Center, University of Kansas, Lawrence, Kansas 66047, United States
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20
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Colgin N, Flinn T, Cobb SL. Synthesis and properties of MIDA boronate containing aromatic amino acids: new peptide building blocks. Org Biomol Chem 2011; 9:1864-70. [PMID: 21283875 DOI: 10.1039/c0ob00847h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the synthesis of novel phenylalanine and tyrosine derivatives containing a N-methyliminodiacetic acid boronate group. These compounds can be prepared enantiomerically pure, they are stable to column chromatography and they can be stored in air for two months without degradation occurring. This new class of boronate containing aromatic amino acids has potential applications in both peptide chemistry and natural product synthesis.
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Affiliation(s)
- Neil Colgin
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, United Kingdom
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21
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Ross AJ, Lang HL, Jackson RFW. Much Improved Conditions for the Negishi Cross-Coupling of Iodoalanine Derived Zinc Reagents with Aryl Halides. J Org Chem 2009; 75:245-8. [DOI: 10.1021/jo902238n] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew J. Ross
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Hannah L. Lang
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Richard F. W. Jackson
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
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22
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Bernini R, Barontini M, Crisante F, Ginnasi MC, Saladino R. A novel and efficient synthesis of DOPA and DOPA peptides by oxidation of tyrosine residues with IBX. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Bartrum HE, Adams H, Caggiano L, Jackson RF. Synthesis of β2-homophenylalanine derivatives by Negishi cross-coupling reactions. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.02.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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