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Phosphines featuring a hexafluorocyclopentene skeleton: Synthesis, coordination properties, and applications for Lewis-acidic transition-metal catalysts. RESULTS IN CHEMISTRY 2019. [DOI: 10.1016/j.rechem.2019.100008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Ozawa F, Nakajima Y. PNP-Pincer-Type Phosphaalkene Complexes of Late Transition Metals. CHEM REC 2016; 16:2314-2323. [PMID: 27456074 DOI: 10.1002/tcr.201600054] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Indexed: 01/31/2023]
Abstract
This account summarizes our recent studies on PNP-pincer-type phosphaalkene complexes. Phosphaalkenes with a P=C bond possess an extremely low-lying π* orbital and have a marked tendency to engage in strong π back-bonding with transition metals. This particular ligand property provides PNP-pincer complexes with unique structures and reactivities. 2,6-Bis(phosphaethenyl)pyridine leads to the isolation of coordinatively unsaturated complexes of Fe(I) and Cu(I); the former adopts a trigonal monopyramidal configuration, whereas the latter has a strong affinity for PF6- and SbF6- as non-coordinating anions. Unsymmetrical PNP-pincer-type phosphaalkene complexes of Ir(I) bearing a dearomatized pyridine unit instantly cleave the N-H bond of NH3 and the C-H bond of MeCN at room temperature. The dearomatized iridium complexes catalyze the dehydrative coupling of amines with alcohols to afford N-alkylated amines and imines in high yields.
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Affiliation(s)
- Fumiyuki Ozawa
- International Research Center for Elements Science (IRCELS), Institute for Chemical Research Kyoto University, Uji, Kyoto, 611-0011, Japan.
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic Chemistry National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8565, Japan.
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Taguchi HO, Sasaki D, Takeuchi K, Tsujimoto S, Matsuo T, Tanaka H, Yoshizawa K, Ozawa F. Unsymmetrical PNP-Pincer Type Phosphaalkene Ligands Protected by a Fused-Ring Bulky Eind Group: Synthesis and Applications to Rh(I) and Ir(I) Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00113] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hiro-omi Taguchi
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Daichi Sasaki
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Katsuhiko Takeuchi
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Shota Tsujimoto
- Department
of Applied Chemistry, Faculty of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-8502, Japan
| | - Tsukasa Matsuo
- Department
of Applied Chemistry, Faculty of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-8502, Japan
| | - Hiromasa Tanaka
- Institute
for Materials Chemistry and Engineering, International Research Center
for Molecular Systems, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute
for Materials Chemistry and Engineering, International Research Center
for Molecular Systems, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Fumiyuki Ozawa
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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