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Synthesis and application of new chiral bidentate phosphine, 2,7-di-tert-butyl-9,9-dimethyl-4,5-bis(methylphenylphosphino)xanthene |
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| Authors: | Yasumasa Hamada Fumiyoshi Matsuura Makoto Oku Keiichiro Hatano Takayuki Shioiri |
| Institution: | a Faculty of Pharmaceutical Sciences, Chiba University, Yayoi-cho, Inage-ku, Chiba 263, Japan b Faculty of Pharmaceutical Sciences, Nagoya City University, Tanabe-dori, Mizuho-ku, Nagoya 467, Japan |
| Abstract: | New optically active bidentate phosphines, (S,S)- and (R,R)-2,7-di-tert-butyl-9,9-dimethyl-4,5-bis(methylphenylphosphino)xanthenes ((S,S)-1 and (R,R)-1), were prepared through resolution of the corresponding phosphine oxides using (R,R)-(−)-dibenzoyl-tartaric acid and a preliminary experiment on asymmetric synthesis using an allyl substrate proved the utility of the new bidentate phosphines. |
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