(1S,3R,4R,5R,6S)-6-exo-(benzyloxy)-3-exo-<(1'S,2'S,3'R,4'R,5'S,6'S)-1'-hydroxy-3',4':5',6'-bis(isopropylidenedioxy)-2',4'-dimethylhept-1'-yl>-1,5-endo-dimethyl-7-oxabicyclo<2.2.1>heptan-2-one 在
L-Selectride 作用下,
以
四氢呋喃 为溶剂,
以86%的产率得到(1R,2R,3S,4R,5R,6S)-6-exo-(benzyloxy)-3-exo-<(1'S,2'S,3'R,4'R,5'S,6'S)-1'-hydroxy-3',4':5',6'-bis(isopropylidenedioxy)-2',4'-dimethylhept-1'-yl>-1,5-endo-dimethyl-7-oxabicyclo<2.2.1>heptan-2-exo-ol