Tetrahedron Letters p. 8961 - 8964 (1997)
Update date:2022-08-03
Topics:
Hamada, Yasumasa
Matsuura, Fumiyoshi
Oku, Makoto
Hatano, Keiichiro
Shioiri, Takayuki
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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