Metallocene bis(perfluoroalkanesulfonate)s as air-stable cationic Lewis acids |
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| Authors: | Renhua Qiu Guoping Zhang Xinhua Xu Kangbin Zou Lingling Shao Dawei Fang Yinhui Li Akihiro Orita Ryosuke Saijo Hidetaka Mineyama Tomoyoshi Suenobu Shunichi Fukuzumi Delie An Junzo Otera |
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| Affiliation: | 1. Department of Chemistry, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;2. Department of Applied Chemistry, Okayama University of Science, Ridai-cho, Okayama 700-0005, Japan;3. Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan |
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| Abstract: | Zirconocene and titanocene bis(perfluorooctanesulfonate)s were synthesized. In contrast to the corresponding triflates and perchlorates, these compounds are air- and water-stable. They were proved to be ionic on the basis of conductivity measurements and X-ray analysis, allowing these complexes to be stored for months. The strong Lewis acidity of these cationic metallocene species, which was proved by ESR study, enabled catalytic glycosylation. |
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