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Iwai K, Hikasa A, Yoshioka K, Tani S, Umezu K, Nishiwaki N. Synthesis of Bis(functionalized) Aminals via Successive Nucleophilic Amidation and Amination. J Org Chem 2023; 88:2207-2213. [PMID: 36745736 DOI: 10.1021/acs.joc.2c02647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The central carbonyl group of diethyl mesoxalate (DEMO) exhibits high electrophilicity that allows it to be attacked by versatile nucleophiles. Even a less nucleophilic acid amide serves as a nucleophile to produce N,O-acetal upon treatment with DEMO in the presence of acetic anhydride. When the obtained N,O-acetal was treated with a base, the elimination of acetic acid generated N-acylimine in situ. N-Acylimine is also highly electrophilic, allowing it to accept the second nucleophilic addition by an amine, resulting in α,α-bis(functionalized) aminals. This protocol facilitates the modification of the two different amino groups by altering nucleophiles, resulting in the production of tetra-functionalized methane derivatives on demand. The ring closure between the amide moiety and the amino group was achieved using the structural features to form a six-membered ring.
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Affiliation(s)
- Kento Iwai
- School of Engineering Science, Kochi University of Technology, Tosayamada, Kami 782-8502, Kochi, Japan.,Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami 782-8502, Kochi, Japan
| | - Akari Hikasa
- School of Engineering Science, Kochi University of Technology, Tosayamada, Kami 782-8502, Kochi, Japan
| | - Kotaro Yoshioka
- Kumiai Chemical Industry Co. Ltd., Nakanogo, Fuji 421-3306, Shizuoka, Japan
| | - Shinki Tani
- Kumiai Chemical Industry Co. Ltd., Nakanogo, Fuji 421-3306, Shizuoka, Japan
| | - Kazuto Umezu
- Kumiai Chemical Industry Co. Ltd., Nakanogo, Fuji 421-3306, Shizuoka, Japan
| | - Nagatoshi Nishiwaki
- School of Engineering Science, Kochi University of Technology, Tosayamada, Kami 782-8502, Kochi, Japan.,Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami 782-8502, Kochi, Japan
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Fernández-Gijón CA, Olvera-Mancilla J, Lagadec RL, Barba-Behrens N, Rico-Bautista H, Toscano RA, Alexandrova L. 2-Substituted perimidines: Zwitterionic tauterism in solid state, substituent effect on their crystal packing and biological activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Unusual products of reaction between aminoisoxazoles and aromatic aldehydes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Confirmed Mechanism for 1,8-Diaminonaphthalene and Ethyl Aroylpyrovate Derivatives Reaction, DFT/B3LYP, and Antimicrobial Activity of the Products. J CHEM-NY 2018. [DOI: 10.1155/2018/4086824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Two new series of perimidine derivatives were prepared from the reaction of 1,8-diaminonaphthalene with ethyl aroylpyrovate followed by coupling for the products. The structures, the mechanism, and the tautomeric forms of the products have been discussed on the basis of spectral data aided with the computational study. Applying Guassian09 software, the reaction mechanism was assured. The energy contents were computed after optimization for all proposed structures. The likely extracted compound has a reduced heat during formation and internal energy which coincides with experimental outcomes. The antimicrobial activity of all products was screened, and their results indicated the presence of five derivatives more potent than the reference drugs used. The simulation procedure was executed by Autodock 4.2 tools over the expected compounds yielded (12 and 21). This computational technique asserts on the drug behavior inside the causative organism proteins. The organisms here match with that used in the antimicrobial and antifungal study.
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