(S,S)-2,3-Bis(diphenylphosphinoyl)butane, an immediate precursor of (S,S)-CHIRAPHOS, can be obtained with 70% de and 71% op via double asymmetric hydrogenation of 2,3-bis(diphenylphosphinoyl)buta-1,3-diene in the presence of Ru-(S)-BINAP catalysts.
Synthesis of Chiraphos via asymmetric hydrogenation of 2,3-bis(diphenylphosphinoyl)buta-1,3-diene
BEGHETTO, Valentina;MATTEOLI, Ugo;SCRIVANTI, Alberto
2000
Abstract
(S,S)-2,3-Bis(diphenylphosphinoyl)butane, an immediate precursor of (S,S)-CHIRAPHOS, can be obtained with 70% de and 71% op via double asymmetric hydrogenation of 2,3-bis(diphenylphosphinoyl)buta-1,3-diene in the presence of Ru-(S)-BINAP catalysts.
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