Enzyme-mediated stereoselective aldol reaction between dihydroxyaceton
e phosphate (DHAP, 1) and (2R,4R)-6-benzyloxy-2,4-dimethoxyhexanal (8)
was catalyzed by rabbit muscle aldolase (RAMA) to generate (3S,4R,5R,
7R)-trihydroxyketone 12, which could be easily transformed to the mask
ed polyhydroxylated compound 15 corresponding to the C-9 approximately
C-16 segment of pentamycin (6).