201226-87-1Relevant articles and documents
Synthesis and application of new chiral bidentate phosphine, 2,7-di-tert-butyl-9,9-dimethyl-4,5-bis (methylphenylphosphino)xanthene
Hamada, Yasumasa,Matsuura, Fumiyoshi,Oku, Makoto,Hatano, Keiichiro,Shioiri, Takayuki
, p. 8961 - 8964 (1997)
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.