摘要:
Optically active methyl 6-oxo-3.5-syn-isopropylidenedioxyhexanoate (5) was prepared by enantioselective syn-reduction of beta,delta-diketo ester 2, followed by hydrolysis, protection of the diol moiety and ozonolysis, and was converted into a highly potent HMG Co-A reductase inhibitor NK-104 and an analogue.