(4a'S,7a'R,12b'S)-7'-(cyclopropylmethyl)-11'-methoxy-6'-oxo-3',4',7',7a',8',12b'-hexahydrospiro[1,3-dioxolane-2,2'-phenanthro[9,8a-d][1,3]oxazole]-12b'(1'H)-carbaldehyde                                                                                                                                                              在
                                                                                                                                                                                 
sodium chlorite   、                                                                                                  
2-甲基-2-丁烯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
水   、                                                                                         
叔丁醇                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以72%的产率得到(4a'S,7a'R,12b'S)-7'-(cyclopropylmethyl)-11'-methoxy-6'-oxo-3',4',6',7',7a',8'-hexahydrospiro[1,3-dioxolane-2,2'-phenanthro[9,8a-d][1,3]oxazole]-12b'(1'H)-carboxylic acid