A variety of alcohols and phenols are efficiently acetylated with acetic anhydride in the presence of a catalytic amount of V(HSO_4)_3 in solution and under sol
Chiral monodentate phosphoramidite ligands were conveniently prepared from 1,1′-bi-2-naphthol(BINOL) and(S)-pyrrolidine in good yields,which were effective chi