摘要:
[GRAPHIC]Pd-catalyzed monophosphinylation of (R)-2-bromo-T-iodo1,1'-binaphthyl with Ph2P(O)H afforded (R)-2-bromo-2'diphenylphosphinyl-1,1'-binaphthyl in good yield with excellent chemo selectivity and no observable racemization. Subsequent lithiation in the presence of excess thiosulfonate furnished an enantiomerically pure sulfenylation product, which was reduced to afford a chiral S-MOP ligand.