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Iizuka K, Maegawa Y, Shimoyama Y, Sakamoto K, Kayakiri N, Goto Y, Naganawa Y, Tanaka S, Yoshida M, Inagaki S, Nakajima Y. Suzuki-Miyaura Cross-Coupling Reaction Using Palladium Catalysts Supported on Phosphine Periodic Mesoporous Organosilica. Chemistry 2024; 30:e202303159. [PMID: 38018377 DOI: 10.1002/chem.202303159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 11/30/2023]
Abstract
Phosphine periodic mesoporous organosilicas (R-P-PMO-TMS: R=Ph, tBu), which possess electron-donating alkyl substituents on the phosphorus atom, were synthesized using bifunctional compounds with alkoxysilyl- and phosphino groups, bis[3-(triethoxysilyl)propyl]phenylphosphine borane (1 a) and bis[3-(triethoxysilyl)propyl]-tert-butylphosphine borane (1 b). Immobilization of Pd(0) species was performed to give R-P-Pd-PMO-TMS: R=Ph (2 a), tBu (3 a), respectively. The Pd(0) immobilized 2 a and 3 a were applicable as catalysts for Suzuki-Miyaura cross-coupling reactions of aryl chlorides with phenylboronic acid. It was revealed that 3 a bearing more electron-donating tBu groups exhibited higher catalytic activity. Various functional groups including both electron withdrawing and donating substituents were compatible in the system. The recyclability of 3 a was examined to support its moderate utility for the recycle use.
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Affiliation(s)
- Kosuke Iizuka
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
- Tokyo Institute of Technology, School of Materials and Chemical Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | | | - Yoshihiro Shimoyama
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Kei Sakamoto
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Natsuko Kayakiri
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Yasutomo Goto
- Toyota Central R&D Labs., Inc., Nagakute, Aichi, 480-1192, Japan
| | - Yuki Naganawa
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Shinji Tanaka
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Masaru Yoshida
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Shinji Inagaki
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
- Toyota Central R&D Labs., Inc., Nagakute, Aichi, 480-1192, Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
- Tokyo Institute of Technology, School of Materials and Chemical Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
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Saito H, Shimokawa J, Yorimitsu H. The dioxasilepanyl group as a versatile organometallic unit: studies on stability, reactivity, and utility. Chem Sci 2021; 12:9546-9555. [PMID: 34349929 PMCID: PMC8278973 DOI: 10.1039/d1sc02083h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/05/2021] [Indexed: 12/15/2022] Open
Abstract
Organic synthesis is performed based on precise choices of functional groups and reactions employed. In a multistep synthesis, an ideal functional group should be compatible with various reaction conditions and unaltered until it is subjected to a selective conversion. The current study was set out to search for a silicon functionality that meets these criteria. Here we have established a new silicon-based synthetic methodology centred on a bulky 7-membered dialkoxysilyl group (2,4,4,7,7-pentamethyl-1,3,2-dioxasilepan-2-yl) that uniquely has both stability and on-demand reactivity. The exceptional stability of this functional group was corroborated by both experimental and computational studies which demonstrated that key factors for its stability were a 7-membered structure and steric hindrance. In turn, the dioxasilepanyl group was found to become reactive and to be easily transformed in the presence of appropriate activators. Combined with the development of easy and robust methods to introduce the dioxasilepanyl group onto aryl rings, these findings have allowed a shorter and more efficient synthesis of a bioactive molecule, thus demonstrating the potential utility of the easily accessible dioxasilepanyl group in organic synthesis.
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Affiliation(s)
- Hayate Saito
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Jun Shimokawa
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo-ku Kyoto 606-8502 Japan
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Propylsulfonic acid-anchored isocyanurate-based periodic mesoporous organosilica (PMO-ICS-Pr-SO 3H): A new and highly efficient recoverable nanoporous catalyst for the one-pot synthesis of bis(indolyl)methane derivatives. J Colloid Interface Sci 2017; 505:956-963. [PMID: 28687033 DOI: 10.1016/j.jcis.2017.06.055] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 06/12/2017] [Accepted: 06/17/2017] [Indexed: 11/22/2022]
Abstract
A new propylsulfonic acid-anchored isocyanurate bridging periodic mesoporous organosilica (PMO-ICS-Pr-SO3H) was prepared and shown to be a highly efficient recyclable nanoporous catalyst for the one-pot synthesis of bis(indolyl)methane derivatives in good to excellent yields from indole and different aldehydes in EtOH under mild reaction conditions in short reaction times. Moreover, the nanoporous catalyst was recovered and reused at least four times without significant decrease in its catalytic activity. The PMO-ICS-Pr-SO3H catalyst was characterizred by Fourier transform infrared (FTIR) spectroscopy, thermogravimetry analysis (TGA) and N2 adsorption-desorption isotherms techniques as well as field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray (EDX) spectroscopy. Compared to the classical methodologies, this method illustrated significant advantages including low loading of the catalyst, high to excellent yields, short reaction times, avoiding the use of toxic transition metals or reactive reagents for modification of the catalytic activity, easy separation and purification of the products, and reusability of the catalyst.
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Waki M, Maegawa Y, Hara K, Goto Y, Shirai S, Yamada Y, Mizoshita N, Tani T, Chun WJ, Muratsugu S, Tada M, Fukuoka A, Inagaki S. A Solid Chelating Ligand: Periodic Mesoporous Organosilica Containing 2,2′-Bipyridine within the Pore Walls. J Am Chem Soc 2014; 136:4003-11. [DOI: 10.1021/ja4131609] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | | | - Kenji Hara
- Catalysis
Research Center, Hokkaido University, Sapporo 001-0021, Japan
| | | | | | | | | | | | - Wang-Jae Chun
- Graduate
School of Arts and Sciences, International Christian University, Mitaka, Tokyo 181-8585, Japan
| | | | | | - Atsushi Fukuoka
- Catalysis
Research Center, Hokkaido University, Sapporo 001-0021, Japan
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