Abstract
A number of new chiral diphosphine ligands with a pinene framework were synthesized and tested in some transition metal-catalyzed asymmetric reactions (enantioselectivities up to 84% ee were achieved). The [2,3]-sigmatropic allylphosphinite–allyl phosphine oxide rearrangement was applied as a key step of the synthesis. An improved procedure for the phosphine oxide reduction and a new protocol for the deprotection of phosphine–borane complexes were developed.
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