3-Methyl-butyric acid (R)-1-[(2S,4S,6S,8S)-4,10-dimethyl-8-(3-methyl-butyryloxymethyl)-1,7-dioxa-spiro[5.5]undec-2-yl]-2-methyl-propyl ester                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                以90%的产率得到3-Methyl-butyric acid (R)-1-((2S,4S,6S,8S)-8-hydroxymethyl-4,10-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl)-2-methyl-propyl ester