Synthesis of new C2-symmetrical diphosphines using chiral zinc organometallics

Article abstract of DOI:10.1016/S0957-4166(97)00052-9

The new C₂-symmetrical diphosphines 1-4 of potential interest for asymmetric catalysis were prepared in protected form by a convergent synthesis based on the use of readily available (S,S)-1,2-cyclohexanedicarboxylic acid 8 and the phosphorus reagent (Et₂N)₂PLi·BH₃.