An evaluation of the PIVS reduction—complexation by nickelocene as a synthetic tool in organophosphorus chemistry; towards the synthesis of functional phosphines with an optically active phosphorus centre
An evaluation of the PIVS reduction—complexation by nickelocene as a synthetic tool in organophosphorus chemistry; towards the synthesis of functional phosphines with an optically active phosphorus centre
Enantioselective Deprotonation as a Vehicle for the Asymmetric Synthesis of C2-Symmetric P-Chiral Diphosphines
作者:Alexander R. Muci、Kevin R. Campos、David A. Evans
DOI:10.1021/ja00140a028
日期:1995.9
Communication is to disclose a convenient approach to the synthesis of Cz-symmetric P-chiral diphosphines4 that relies upon successive enantioselectivedeprotonation of aryldimethylphosphine-boranes or aryldimethylphosphine sulfides (eq 1) and subsequent oxidative coupling to the diphosphine precursors (eq 2) with high overall enantioselectivity (296%) for the two-step process.