、
(1S,2S,3S,4S,6R)-1,4-Bis-(tert-butyl-dimethyl-silanyloxy)-3-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-methyl-7-oxa-bicyclo[4.2.0]octane-2-carbaldehyde 以
四氢呋喃 为溶剂,
以60%的产率得到(S)-{(1S,3S,4S,6R)-1,4-Bis-(tert-butyl-dimethyl-silanyloxy)-3-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-methyl-7-oxa-bicyclo[4.2.0]oct-2-yl}-[5-(tert-butyl-dimethyl-silanyloxymethyl)-4,6,6-trimethyl-cyclohexa-1,4-dienyl]-methanol