[(1S,2S,3S,4S,5R,8S)-3-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-5-(tert-butyl-diphenyl-silanyloxymethyl)-1,8-bis-methoxymethoxy-2-methyl-bicyclo[2.2.2]oct-2-yl]-methanol                                                                                                                                                              在
                                                                                                                                                                                 
4-甲基苯磺酸吡啶                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以96%的产率得到2-[(1S,2S,3S,4S,6R,7S)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-3-hydroxymethyl-4,7-bis-methoxymethoxy-3-methyl-bicyclo[2.2.2]oct-2-yl]-ethanol