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This chapter is concerned with an update on the preparation and applications of optically active phosphine ligands which bear the chiral center at a phosphorus atom. A great deal of P-chirogenic ligands have been reported over the past ten years, and their unique structure reproduced here. However, only syntheses of ligands which have been the subject of several literature reports in terms of applications...
(S,S)-1,2-Bis(boranato(tert-butyl)phosphino)ethane has been synthesized efficiently and in excellent enantioselectivity. This secondary diphosphine serves as the starting material for an elegant preparation of (R,R)-1,2-bis(boranato(tert-butyl)methylphosphino)ethane, known as (R,R)-t-Bu-BisP*-borane.
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