6-tert-butoxy-8-(tert-butyldimethyl-silanyloxy)-9-hydroxy-1,5-dimethyl-2-oxa-bicyclo[3.3.1]nonan-3-one                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                生成                                                 (3aR,4S,7R)-4-tert-butoxy-6-(tert-butyldimethylsilyloxy)-7-hydroxy-3a,7-dimethylhexahydrobenzofuran-2(3H)-one