2-[(2S,3R,4R,5S,6S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-3-(4-methoxy-benzyloxy)-4-methyl-tetrahydro-pyran-2-yl]-ethanol 以65%的产率得到[(2S,3R,4R,5S,6S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-3-(4-methoxy-benzyloxy)-4-methyl-tetrahydro-pyran-2-yl]-acetaldehyde