乙酸酐   、                                                                                      
(6S,8R,9R,10R,11R)-9,10-Diacetoxy-8-acetoxymethyl-11-azido-3-tert-butoxycarbonylamino-1,7-dioxa-spiro[5.5]undec-4-ene-3-carboxylic acid methyl ester                                                                                                                                                              在
                                                                                                                                         palladium on activated charcoal                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以0.101 mmol的产率得到(3R,6S,8R,9R,10R,11R)-9,10-Diacetoxy-8-acetoxymethyl-11-acetylamino-3-tert-butoxycarbonylamino-1,7-dioxa-spiro[5.5]undecane-3-carboxylic acid methyl ester