Synthesis of (R)-2-diphenylphosphino-2′-diphenylphosphinomethyl-1, 1′-binaphthyl and its use for asymmetric hydrogenation of α-alkylstyrenes
K Inagaki, T Ohta, K Nozaki, H Takaya
Index: Inagaki, Kohji; Ohta, Tetsuo; Nozaki, Kyoko; Takaya, Hidemasa Journal of Organometallic Chemistry, 1997 , vol. 531, # 1-2 p. 159 - 163
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Citation Number: 18
Abstract
A new chiral bisphosphine ligand ((R)-2-diphenylphosphino-2′-diphenylphosphinomethyl- 1, 1′-binaphthyl) was synthesized from enantiomerically pure (R)-1, 1′-binaphthalene-2, 2′-diol. Rhodium (I) complexes of this bisphosphine ligand have been used as catalysts for asymmetric hydrogenation of α-alkylstyrenes to give the corresponding aromatic hydrocarbons in up to 77% ee.
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