2-叔丁基-1,3-二异丙基异脲   、                                                                                      
(1S,3S,4S,5R,6R,7R)-6,7-Bis-benzoyloxy-4-hydroxy-1-methyl-2,8-dioxa-bicyclo[3.2.1]octane-3,4,5-tricarboxylic acid                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以45%的产率得到(1S,3S,4S,5R,6R,7R)-6,7-bis-benzoyloxy-3,4,5-tris-(2,2-dimethyl-propionyl)-4-hydroxy-1-methyl-2,8-dioxabicyclo[3.2.1]octane