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Kinetics of Photo-Oxidation of Oxazole and its Substituents by Singlet Oxygen. Sci Rep 2020; 10:3668. [PMID: 32111853 PMCID: PMC7048806 DOI: 10.1038/s41598-020-59889-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 02/05/2020] [Indexed: 11/08/2022] Open
Abstract
Oxazole has critical roles not only in heterocycle (bio)chemistry research, but also as the backbone of many active natural and medicinal species. These diverse and specialised functions can be attributed to the unique physicochemical properties of oxazole. This contribution investigates the reaction of oxazole and its derivatives with singlet oxygen, employing density functional theory DFT-B3LYP calculations. The absence of allylic hydrogen in oxazole eliminates the ene-mode addition of singlet oxygen to the aromatic ring. Therefore, the primary reaction pathway constitutes the [4 + 2]-cycloaddition of singlet oxygen to oxazole ring, favouring an energetically accessible corridor of 57 kJ/mol to produce imino-anhydride which is postulated to convert to triamide end-product in subsequent steps. The pseudo-first-order reaction rate for substituted oxazole (e.g., 4-methyl-2,5-diphenyloxazole, 1.14 × 106 M-1 s-1) appears slightly higher than that of unsubstituted oxazole (0.94 × 106 M-1 s-1) considering the same initial concentration of the species at 300 K, due to the electronic effect of the functional groups. The global reactivity descriptors have justified the relative influence of the functional groups along with their respective physiochemical properties.
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2
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Theoretical study of anticancer properties of indolyl-oxazole drugs and their interactions with DNA base pairs in gas phase and solvent. Struct Chem 2014. [DOI: 10.1007/s11224-014-0546-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gulevich AV, Dudnik AS, Chernyak N, Gevorgyan V. Transition metal-mediated synthesis of monocyclic aromatic heterocycles. Chem Rev 2013; 113:3084-213. [PMID: 23305185 PMCID: PMC3650130 DOI: 10.1021/cr300333u] [Citation(s) in RCA: 814] [Impact Index Per Article: 74.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Anton V. Gulevich
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
| | - Alexander S. Dudnik
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
| | - Natalia Chernyak
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
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Shaw AY, Xu Z, Hulme C. Ugi/Robinson-Gabriel reactions directed toward the synthesis of 2,4,5-trisubstituted oxazoles. Tetrahedron Lett 2012; 53:1998-2000. [PMID: 23559684 PMCID: PMC3613284 DOI: 10.1016/j.tetlet.2012.02.030] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This Letter discloses a novel concise synthesis of a series of 2,4,5-trisubstituted oxazoles via a tandem Ugi/Robinson-Gabriel sequence. Herein, 2,4-dimethoxybenzylamine 1 was used as an ammonia equivalent in combination with arylglyoxal 3 and supporting Ugi reagents, an isonitrile and carboxylic acid. As such the product of the acid treated Ugi intermediate is ideally configured to undergo a Robinson-Gabriel cyclodehydration reaction to yield the desired oxazole scaffold 5.
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Affiliation(s)
- Arthur Y Shaw
- Department of Pharmacology and Toxicology, College of Pharmacy, BIO5 Oro Valley, The University of Arizona, 1580 E. Hanley Blvd., Oro Valley, AZ 85737, USA
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6
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Chemoenzymatic synthesis of highly enantiomerically enriched secondary alcohols with a thiazolic core. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Akai S, Sato KI, Nagaya A, Yamagishi Y, Yonezawa Y, Shin CG. Scope and Limitations of a Modified Hantzsch Reaction for the Synthesis of Oxazole-Dehydroamino Acid Derivatives from Dehydroamino Acid Amides. HETEROCYCLES 2012. [DOI: 10.3987/com-11-12372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Ritson DJ, Spiteri C, Moses JE. A Silver-Mediated One-Step Synthesis of Oxazoles. J Org Chem 2011; 76:3519-22. [DOI: 10.1021/jo1025332] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dougal J. Ritson
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, United Kingdom
| | - Christian Spiteri
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, United Kingdom
| | - John E. Moses
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, United Kingdom
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Linder J, Garner TP, Williams HEL, Searle MS, Moody CJ. Telomestatin: formal total synthesis and cation-mediated interaction of its seco-derivatives with G-quadruplexes. J Am Chem Soc 2010; 133:1044-51. [PMID: 21162526 DOI: 10.1021/ja109158k] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The structurally unique natural product telomestatin incorporates seven oxazole rings and one sulfur-containing thiazoline in a macrocyclic arrangement. The compound is a potent inhibitor of the enzyme telomerase and therefore provides a structural framework for developing new potential therapeutic agents for cancer. An efficient formal total synthesis of telomestatin is reported in which the key steps are the use of dirhodium(II)-catalyzed reactions of diazocarbonyl compounds to generate six oxazole rings, demonstrating the power of rhodium carbene methodology in organic chemical synthesis. CD spectroscopy establishes that seco-derivatives of telomestatin are potent stabilizers of G-quadruplex structures derived from the human telomeric repeat sequence. Mass spectrometry studies, confirmed by molecular dynamics simulations, provide the first evidence that high affinity binding to terminal G-tetrads in both 1:1 and 2:1 ligand complexes is mediated through the macrocycle coordinating a monovalent cation, with selectivity for the antiparallel structure.
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Affiliation(s)
- Jörg Linder
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Hoffman TJ, Kolleth A, Rigby JH, Arseniyadis S, Cossy J. Stereoselective Synthesis of the C1−C11 and C12−C34 Fragments of Mycalolide A. Org Lett 2010; 12:3348-51. [DOI: 10.1021/ol101145t] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas J. Hoffman
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Amandine Kolleth
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - James H. Rigby
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Stellios Arseniyadis
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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An expeditious synthesis and anticancer activity of novel 4-(3′-indolyl)oxazoles. Eur J Med Chem 2010; 45:1244-9. [DOI: 10.1016/j.ejmech.2009.12.024] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Revised: 12/03/2009] [Accepted: 12/10/2009] [Indexed: 11/17/2022]
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12
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Araki H, Katoh T, Inoue M. Iterative two-step strategy for C2–C4′ linked poly-oxazole synthesis using Suzuki–Miyaura cross-coupling reaction. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.03.109] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Nolt MB, Smiley MA, Varga SL, McClain RT, Wolkenberg SE, Lindsley CW. Convenient preparation of substituted 5-aminooxazoles via a microwave-assisted Cornforth rearrangement. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.12.065] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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D. Shipe W, Yang F, Zhao Z, E. Wolkenberg S, Brad Nolt M, W. Lindsley C. Convenient and General Microwave-Assisted Protocols for the Expedient Synthesis of Heterocycles. HETEROCYCLES 2006. [DOI: 10.3987/rev-06-sr(w)1] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Imoto H, Matsumoto M, Odaka H, Sakamoto J, Kimura H, Nonaka M, Kiyota Y, Momose Y. Studies on Non-Thiazolidinedione Antidiabetic Agents. 3. Preparation and Biological Activity of the Metabolites of TAK-559. Chem Pharm Bull (Tokyo) 2004; 52:120-4. [PMID: 14709878 DOI: 10.1248/cpb.52.120] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Preparation and biological activity of the metabolites of the potent antihyperglycemic and antihyperlipidemic agent, (E)-4-(4-[(5-methyl-2-phenyl-1,3-oxazol-4-yl)methoxy]benzyloxyimino)-4-phenylbutyric acid (TAK-559) (1), were investigated. Metabolites M-I (2), M-II (3), M-III (4) and M-IV (5) were synthesized and their biological activities were evaluated by in vitro and in vivo experiments. Compounds 2-4 activate human peroxisome proliferator-activated receptor gamma one (hPPARgamma1) and hPPARalpha, but their activities are weaker than those of TAK-559 (1). Compound 5 only activates hPPARgamma1 weakly. TAK-559 (1) showed potent in vivo plasma glucose and triglyceride lowering activities in Wistar fatty rats after intraperitoneal administration, while its metabolites (2-5) showed comparatively weak activities.
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Affiliation(s)
- Hiroshi Imoto
- Pharmaceutical Research Division, Takeda Chemical Industries Ltd., 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka 532-8686, Japan.
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Lee YR, Suk JY, Kim BS. Rhodium(II)-catalyzed reactions of 3-diazo-2,4-chromenediones. First one-step synthesis of pterophyllin 2. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01317-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Wolbers P, Misske AM, Martin R.%Hoffinann H. Synthesis of the enantiopure C15–C26 segment of phorboxazole A and B. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00803-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Liu P, Panek JS. Studies directed toward the total synthesis of kabiramide C: Asymmetric synthesis of the C7–C19 fragment. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01298-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Beall LS, Padwa A. Application of nitrogen ylide cyclizations for organic synthesis. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s1521-4478(98)80014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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23
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Liu P, Celatka CA, Panek JS. Synthesis of the fully functionalized tris-oxazole fragment found in metabolites derived from marine organisms. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01218-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Zhang X, Hinkle B, Ballantyne L, Gonzales S, Peña MR. Synthetic studies toward phenoxan analogs. J Heterocycl Chem 1997. [DOI: 10.1002/jhet.5570340356] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Chapter 1 The synthesis of oxazoles from diazocarbonyl compounds. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0959-6380(97)80003-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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26
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Steel PJ. Aromatic Biheterocycles: Syntheses, Structures, and Properties. ADVANCES IN HETEROCYCLIC CHEMISTRY 1996. [DOI: 10.1016/s0065-2725(08)60070-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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27
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Carbenes and Carbenoids in Synthesis of Heterocycles. ADVANCES IN HETEROCYCLIC CHEMISTRY 1996. [DOI: 10.1016/s0065-2725(08)60296-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Haigh D. Rhodium carbenoid O-H insertion reactions with phenols; A facile method for the synthesis of trialkyl 2-aryloxyphosphonoacetates and their use in the preparation of 2-aryloxy-3-phenylpropanoates. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)81116-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Doyle KJ, Moody CJ. The rhodium carbenoid route to oxazoles. Synthesis of 4-functionalised oxazoles; Three step preparation of a bis-oxazole. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)90396-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Williams DR, McClymont E. Carbanion methodology for alkylations and acylations in the synthesis of substituted oxazoles. The formation of Cornforth rearrangement products. Tetrahedron Lett 1993. [DOI: 10.1016/s0040-4039(00)61544-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Connell RD, Tebbe M, Gangloff AR, Helquist P, Åkermark B. Rhodium-catalyzed heterocycloaddition route to 1,3-oxazoles as building blocks in natural products synthesis. Tetrahedron 1993. [DOI: 10.1016/s0040-4020(01)87261-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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34
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Doyle KJ, Moody CJ. Diazo-sulfones and -nitriles in oxazole synthesis; three step preparation of a bis-oxazole. Tetrahedron Lett 1992. [DOI: 10.1016/0040-4039(93)88041-g] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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