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Kondoh A, Terada M. Brønsted base-catalyzed 1,2-addition/[1,2]-phospha-Brook rearrangement sequence providing functionalized phosphonates. Org Biomol Chem 2022; 20:2863-2866. [PMID: 35302579 DOI: 10.1039/d2ob00256f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new methodology for the introduction of functional groups into an organic molecule in which a keto or a formyl group is used as the connecting site was developed by utilizing the 1,2-addition/[1,2]-phospha-Brook rearrangement sequence under Brønsted base catalysis. The reaction of aromatic aldehydes and ketones with phosphinates having functional groups such as alkynyl, bromoalkyl, N-Boc amino, and boryl groups efficiently proceeded with the aid of phosphazene base P2-tBu as the catalyst, providing densely functionalized phosphonates in good yields.
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Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan.
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
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Iwabuchi Y, Nagasawa S. The Utility of Oxoammonium Species in Organic Synthesis: Beyond Alcohol Oxidation. HETEROCYCLES 2022. [DOI: 10.3987/rev-21-sr(r)2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Okamura T, Egoshi S, Dodo K, Sodeoka M, Iwabuchi Y, Kanoh N. Highly Chemoselective gem-Difluoropropargylation of Aliphatic Alcohols. Chemistry 2019; 25:16002-16006. [PMID: 31625215 DOI: 10.1002/chem.201904366] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/16/2019] [Indexed: 01/24/2023]
Abstract
Despite the potential of α-fluoroethers in medicinal chemistry, their synthetic methods, especially etherification of aliphatic alcohols, have been limited. Herein, we developed two- and three-step gem-difluoropropargylation of aliphatic alcohols including amino acid derivatives and naturally occurring bioactive molecules. Highly chemoselective etherification proceeded by using the gem-difluoropropargyl bromide dicobalt complex in the presence of silver triflate and triethylamine. Decomplexation of dicobalt complexes was achieved by using cerium ammonium nitrate or N,N,N'-trimethylethylenediamine. The thus obtained gem-difluoropropargyl ethers were converted to various α-difluoroethers which are expected to be useful for medicinal chemistry.
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Affiliation(s)
- Toshitaka Okamura
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Syusuke Egoshi
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Kosuke Dodo
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yoshiharu Iwabuchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Naoki Kanoh
- Institute of Medicinal Chemistry, Hoshi University, 2-4-41 Ebara, Sinagawa-ku, Tokyo, 142-8501, Japan
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Okamura T, Fujiki S, Iwabuchi Y, Kanoh N. Gold(i)-catalyzed Nicholas reaction with aromatic molecules utilizing a bifunctional propargyl dicobalt hexacarbonyl complex. Org Biomol Chem 2019; 17:8522-8526. [DOI: 10.1039/c9ob01348b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A benchtop-stable reagent for the catalytic Nicholas reaction with aromatic molecules was developed.
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Affiliation(s)
- Toshitaka Okamura
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578
- Japan
| | - Shogo Fujiki
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578
- Japan
| | - Yoshiharu Iwabuchi
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578
- Japan
| | - Naoki Kanoh
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai 980-8578
- Japan
- Institute of Medicinal Chemistry
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5
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Liu J, Zhao X, Jiang L, Yi W. Tf2
O-Promoted Trifluoromethythiolation of Various Arenes Using NaSO2
CF3. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800702] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jie Liu
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
| | - Xiaochun Zhao
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
| | - Lvqi Jiang
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
| | - Wenbin Yi
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
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Lyapunova AG, Danilkina NA, Rumyantsev AM, Khlebnikov AF, Chislov MV, Starova GL, Sambuk EV, Govdi AI, Bräse S, Balova IA. Relative Reactivity of Benzothiophene-Fused Enediynes in the Bergman Cyclization. J Org Chem 2018; 83:2788-2801. [DOI: 10.1021/acs.joc.7b03258] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Anna G. Lyapunova
- Institute
of Chemistry, Saint Petersburg State University (SPbSU), Universitetskaya
nab. 7/9, 199034 Saint Petersburg, Russia
| | - Natalia A. Danilkina
- Institute
of Chemistry, Saint Petersburg State University (SPbSU), Universitetskaya
nab. 7/9, 199034 Saint Petersburg, Russia
| | - Andrey M. Rumyantsev
- Department
of Genetics and Biotechnology, Saint Petersburg State University (SPbSU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - A. F. Khlebnikov
- Institute
of Chemistry, Saint Petersburg State University (SPbSU), Universitetskaya
nab. 7/9, 199034 Saint Petersburg, Russia
| | - Mikhail V. Chislov
- Research
Centre for Thermogravimetric and Calorimetric Research, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Galina L. Starova
- Institute
of Chemistry, Saint Petersburg State University (SPbSU), Universitetskaya
nab. 7/9, 199034 Saint Petersburg, Russia
| | - Elena V. Sambuk
- Department
of Genetics and Biotechnology, Saint Petersburg State University (SPbSU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Anastasia I. Govdi
- Institute
of Chemistry, Saint Petersburg State University (SPbSU), Universitetskaya
nab. 7/9, 199034 Saint Petersburg, Russia
| | - Stefan Bräse
- Institute
of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
- Institute
of Toxicology and Genetics (ITG), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Irina A. Balova
- Institute
of Chemistry, Saint Petersburg State University (SPbSU), Universitetskaya
nab. 7/9, 199034 Saint Petersburg, Russia
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