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Nicewicz DA, O’Brien CJ. Milled Dry Ice as a C1 Source for the Carboxylation of Aryl Halides. Synlett 2021; 32:814-816. [DOI: 10.1055/a-1384-0159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractThe use of carbon dioxide as a C1 chemical feedstock remains an active field of research. Here we showcase the use of milled dry ice as a method to promote the availability of CO2 in a reaction solution, permitting practical synthesis of arylcarboxylic acids. Notably, the use of milled dry ice produces marked increases in yields relative to those obtained with gaseous CO2, as previously reported in the literature.
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2
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Beveridge RE, Batey RA. An Organotrifluoroborate-Based Convergent Total Synthesis of the Potent Cancer Cell Growth Inhibitory Depsipeptides Kitastatin and Respirantin. Org Lett 2014; 16:2322-5. [DOI: 10.1021/ol500484f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ramsay E. Beveridge
- Davenport
Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada, M5S 3H6
| | - Robert A. Batey
- Davenport
Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada, M5S 3H6
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3
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Shiina I. An Adventurous Synthetic Journey with MNBA from Its Reaction Chemistry to the Total Synthesis of Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20130216] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
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Zhao W, Li Z, Sun J. A New Strategy for Efficient Synthesis of Medium and Large Ring Lactones without High Dilution or Slow Addition. J Am Chem Soc 2013; 135:4680-3. [DOI: 10.1021/ja400883q] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wanxiang Zhao
- Department of Chemistry, The Hong Kong University of Science and Technology,
Clear Water Bay, Kowloon, Hong Kong SAR, China
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055,
China
| | - Zigang Li
- Laboratory of Chemical Genomics,
School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055,
China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology,
Clear Water Bay, Kowloon, Hong Kong SAR, China
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Parenty A, Moreau X, Niel G, Campagne JM. Update 1 of: Macrolactonizations in the Total Synthesis of Natural Products. Chem Rev 2013; 113:PR1-40. [DOI: 10.1021/cr300129n] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- A. Parenty
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
| | - X. Moreau
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Gilles Niel
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
| | - J.-M. Campagne
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
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6
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Taniguchi T, Hirose D, Ishibashi H. Esterification via Iron-Catalyzed Activation of Triphenylphosphine with Air. ACS Catal 2011. [DOI: 10.1021/cs2003824] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Tsuyoshi Taniguchi
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Daisuke Hirose
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroyuki Ishibashi
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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Luong A, Issarapanichkit T, Kong SD, Fong R, Yang J. pH-Sensitive, N-ethoxybenzylimidazole (NEBI) bifunctional crosslinkers enable triggered release of therapeutics from drug delivery carriers. Org Biomol Chem 2010; 8:5105-9. [PMID: 20820656 DOI: 10.1039/c0ob00228c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This paper presents a pH-sensitive bifunctional crosslinker that enables facile conjugation of small molecule therapeutics to macromolecular carriers for use in drug delivery systems. This N-ethoxybenzylimidazole (NEBI) bifunctional crosslinker was designed to exploit mildly acidic, subcellular environments to trigger the release of therapeutics upon internalization in cells. We demonstrate that an analog of doxorubicin (a representative example of an anticancer therapeutic) conjugated to human serum albumin (HSA, a representative example of a macromolecular carrier) via this NEBI crosslinker can internalize and localize into acidic lysosomes of ovarian cancer cells. Fluorescence imaging and cell viability studies demonstrate that the HSA-NEBI-doxorubicin conjugate exhibited improved uptake and cytotoxic activity compared to the unconjugated doxorubicin analog. The pH-sensitive NEBI group was also shown to be relatively stable to biologically-relevant metal Lewis acids and to serum proteins, supporting that these bifunctional crosslinkers may be useful for constructing drug delivery systems that will be stable in biological fluids such as blood.
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Affiliation(s)
- Alice Luong
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093-0358, USA
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Narita K, Kikuchi T, Watanabe K, Takizawa T, Oguchi T, Kudo K, Matsuhara K, Abe H, Yamori T, Yoshida M, Katoh T. Total synthesis of the bicyclic depsipeptide HDAC inhibitors spiruchostatins A and B, 5''-epi-spiruchostatin B, FK228 (FR901228) and preliminary evaluation of their biological activity. Chemistry 2010; 15:11174-86. [PMID: 19760730 DOI: 10.1002/chem.200901552] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The bicyclic depsipeptide histone deacetylase (HDAC) inhibitors spiruchostatins A and B, 5''-epi-spiruchostatin B and FK228 were efficiently synthesized in a convergent and unified manner. The synthetic method involved the following crucial steps: i) a Julia-Kocienski olefination of a 1,3-propanediol-derived sulfone and a L- or D-malic acid-derived aldehyde to access the most synthetically challenging unit, (3S or 3R,4E)-3-hydroxy-7-mercaptohept-4-enoic acid, present in a D-alanine- or D-valine-containing segment; ii) a condensation of a D-valine-D-cysteine- or D-allo-isoleucine-D-cysteine-containing segment with a D-alanine- or D-valine-containing segment to directly assemble the corresponding seco-acids; and iii) a macrocyclization of a seco-acid using the Shiina method or the Mitsunobu method to construct the requisite 15- or 16-membered macrolactone. The present synthesis has established the C5'' stereochemistry of spiruchostatin B. In addition, HDAC inhibitory assay and the cell-growth inhibition analysis of the synthesized depsipeptides determined the order of their potency and revealed some novel aspects of structure-activity relationships. It was also found that unnatural 5''-epi-spiruchostatin B shows extremely high selectivity (ca. 1600-fold) for class I HDAC1 (IC(50)=2.4 nM) over class II HDAC6 (IC(50)=3900 nM) with potent cell-growth-inhibitory activity at nanomolar levels of IC(50) values.
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Affiliation(s)
- Koichi Narita
- Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, 981-8558, Japan
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