H-1 NMR studies on bis(9-O-dihydroquinidinyl)terephthalate (DHQD(2)-TP
) with various concentrations of osmium tetroxide and trans-2-hexene r
eveal that OsO4 is bound to both the quinuclidine moieties of DHQD(2)-
TP but only one or the bound OsO4 reacts with alkenes in the AD proces
s.