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Huguenot F, Vidal M. Phenyloxycarbonyl (Phoc) Carbamate: Chemioselective Reactivity and Tetra- n-butylammonium Fluoride Deprotection Study. ACS OMEGA 2022; 7:44861-44868. [PMID: 36530256 PMCID: PMC9753175 DOI: 10.1021/acsomega.2c04979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 10/12/2022] [Indexed: 06/17/2023]
Abstract
We present the results of the chemoselective reactivity of phenylcarbamates. Phenylcarbamates of primary amines are reactive to form urea, and phenylcarbamates of secondary amines can be used as tags due to the existence of rotamers. Moreover, deprotection attempts to to recover the primary amines in use of a catalytic amount of TBAF show the possibility of obtaining the symmetrical urea from the corresponding phenylcarbamate. We have begun the study of the transformation of Phoc carbamates into the corresponding free amines by TBAF. We present here our most significant results concerning the sensitivity of this reaction in terms of the solvent and substrate.
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Affiliation(s)
- Florent Huguenot
- CNRS
UMR 8038 CiTCoM, Université de Paris, Faculté de Pharmacie
de Paris, 4 Avenue de
l’observatoire, Paris 75006, France
- INSERM
U 1268 Medicinal Chemistry and Translational Research, Paris 75006, France
| | - Michel Vidal
- CNRS
UMR 8038 CiTCoM, Université de Paris, Faculté de Pharmacie
de Paris, 4 Avenue de
l’observatoire, Paris 75006, France
- INSERM
U 1268 Medicinal Chemistry and Translational Research, Paris 75006, France
- UF
Biologie du médicament—Toxicologie, Hôpital Cochin, AP-HP, 27 Rue du Faubourg Saint
Jacques, Paris 75014, France
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2
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Wang H, Li Y, Liu S, Makha M, Bai JF, Li Y. CO 2 -Promoted Direct Acylation of Amines and Phenols by the Activation of Inert Thioacid Salts. CHEMSUSCHEM 2022; 15:e202200227. [PMID: 35289483 DOI: 10.1002/cssc.202200227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Herein a carbon dioxide-promoted synthetic approach for the direct amidation between unactivated thioacid salts and amines under mild conditions was developed for a wide range of substrates. The method afforded amides in good to excellent yields under transition-metal-free and activation-reagent-free conditions, in sharp contrast to early methodologies on amide synthesis based on transition-metal catalysis. The method offered a greener and transition metal-free protocol applicable to pharmaceuticals preparations. Phenolic compounds were also found to be suitable acylation substrates with potassium thiosulfide KHS as the only byproduct. Moreover, this approach was applied to amide synthesis of valuable bio-active molecules such as moclobemide, melatonin, and a fungicide. Insights into the reaction mechanism involving carbon dioxide were provided through NMR spectroscopy and computational calculations. A plausible mechanism was proposed that involves weak interactions between carbon dioxide and potassium thioacetate in a dynamic equilibrium state formation of a six-membered ring.
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Affiliation(s)
- Huan Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yudong Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Shaoli Liu
- College of Chemistry and Chemical Engineering Yantai University, Yantai, 264005, P. R. China
| | - Mohamed Makha
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Jian-Fei Bai
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Yuehui Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
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Pattarawarapan M, Yamano D, Wiriya N, Phakhodee W, Wet-osot S. Mechanochemical Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazoles Mediated by PPh3-TCCA. Synlett 2022. [DOI: 10.1055/s-0040-1719867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractMechanochemical synthesis of 2,5-disubstituted 1,3,4-oxadiazoles was developed as an environmentally benign alternative to conventional solvent-based methods. In the presence of triphenylphosphine and trichloroisocyanuric acid, N-acylbenzotriazoles condense with acylhydrazides leading to oxadiazoles derivatives in good to excellent yields within minutes. The approach circumvents the need for strictly anhydrous conditions, external heating, long reaction times, as well as tedious multistep procedures. A range of substrates with reactive functionalities was also well tolerated.
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Affiliation(s)
- Mookda Pattarawarapan
- Department of Chemistry, Faculty of Science, Chiang Mai University
- Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science, Chiang Mai University
| | - Dolnapa Yamano
- Department of Chemistry, Faculty of Science, Chiang Mai University
| | - Nittaya Wiriya
- Department of Chemistry, Faculty of Science, Chiang Mai University
| | - Wong Phakhodee
- Department of Chemistry, Faculty of Science, Chiang Mai University
- Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science, Chiang Mai University
| | - Sirawit Wet-osot
- Medical Life Science Institute, Department of Medical Sciences, Ministry of Public Health
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Koizumi H, Takeuchi K, Matsumoto K, Fukaya N, Sato K, Uchida M, Matsumoto S, Hamura S, Choi JC. One-pot catalytic synthesis of urea derivatives from alkyl ammonium carbamates using low concentrations of CO 2. Commun Chem 2021; 4:66. [PMID: 36697711 PMCID: PMC9814107 DOI: 10.1038/s42004-021-00505-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
To reduce anthropogenic carbon dioxide (CO2) emissions, it is desirable to develop reactions that can efficiently convert low concentrations of CO2, present in exhaust gases and ambient air, into industrially important chemicals, without involving any expensive separation, concentration, compression, and purification processes. Here, we present an efficient method for synthesizing urea derivatives from alkyl ammonium carbamates. The carbamates can be easily obtained from low concentrations of CO2 as present in ambient air or simulated exhaust gas. Reaction of alkyl ammonium carbamates with 1,3-dimethyl-2-imidazolidinone solvent in the presence of a titanium complex catalyst inside a sealed vessel produces urea derivatives in high yields. This reaction is suitable for synthesizing ethylene urea, an industrially important chemical, as well as various cyclic and acyclic urea derivatives. Using this methodology, we also show the synthesis of urea derivatives directly from low concentration of CO2 sources in a one-pot manner.
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Affiliation(s)
- Hiroki Koizumi
- grid.208504.b0000 0001 2230 7538National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan
| | - Katsuhiko Takeuchi
- grid.208504.b0000 0001 2230 7538National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan
| | - Kazuhiro Matsumoto
- grid.208504.b0000 0001 2230 7538National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan
| | - Norihisa Fukaya
- grid.208504.b0000 0001 2230 7538National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan
| | - Kazuhiko Sato
- grid.208504.b0000 0001 2230 7538National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan
| | - Masahito Uchida
- grid.471275.20000 0004 1793 1661Tosoh Corporation, Advanced Materials Research Laboratory, Ayase, Kanagawa Japan
| | - Seiji Matsumoto
- grid.471275.20000 0004 1793 1661Tosoh Corporation, Minato-ku, Tokyo Japan
| | - Satoshi Hamura
- grid.471275.20000 0004 1793 1661Tosoh Corporation, Minato-ku, Tokyo Japan
| | - Jun-Chul Choi
- grid.208504.b0000 0001 2230 7538National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki Japan
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Li Z, Mayer RJ, Ofial AR, Mayr H. From Carbodiimides to Carbon Dioxide: Quantification of the Electrophilic Reactivities of Heteroallenes. J Am Chem Soc 2020; 142:8383-8402. [DOI: 10.1021/jacs.0c01960] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhen Li
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Robert J. Mayer
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Armin R. Ofial
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
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Saha A, Akhtar N, Kumar V, Kumar S, Srivastava HK, Kumar S, Manna D. pH-Regulated anion transport activities of bis(iminourea) derivatives across the cell and vesicle membrane. Org Biomol Chem 2020; 17:5779-5788. [PMID: 31135015 DOI: 10.1039/c9ob00650h] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recently, synthetic anion transporters have gained considerable attention because of their ability to disrupt cellular anion homeostasis and promote cell death. Herein, we report the development of bis(iminourea) derivatives as a new class of selective Cl- ion carrier. The bis(iminourea) derivatives were synthesized via a one-pot approach under mild reaction conditions. The presence of iminourea moieties suggests that the bis(iminourea) derivatives can be considered as unique guanidine mimics, indicating that the protonated framework could have much stronger anion recognition properties. The cooperative interactions of H+ and Cl- ions with these iminourea moieties results in the efficient transport of HCl across the lipid bilayer in an acidic environment. Under physiological conditions these compounds weakly transport Cl- ions via an antiport exchange mechanism. This pH-dependent gating/switching behavior (9-fold) within a narrow window could be due to the apparent pKa values (6.2-6.7) of the compounds within the lipid bilayer. The disruption of ionic homeostasis by the potent compounds was found to induce cell death.
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Affiliation(s)
- Abhishek Saha
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam, India.
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