[(1'S,2S,2'S,3'R,7'S,8'S,10'R,11'S)-12'-bromo-7'-[tert-butyl(dimethyl)silyl]oxy-1'-hydroxy-10'-[(4-methoxyphenyl)methoxy]-8',15',15'-trimethyl-9',14'-dioxo-13'-prop-2-enoxyspiro[oxirane-2,4'-tricyclo[9.3.1.03,8]pentadec-12-ene]-2'-yl] benzoate                                                                                                                                                              在
                                                                                                                                                                                 sodium tetrahydroborate   、                                                                                                  cerium(III) chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以50%的产率得到[(1'R,2S,2'S,3'R,7'S,8'S,10'R,11'S,14'S)-12'-bromo-7'-[tert-butyl(dimethyl)silyl]oxy-1',14'-dihydroxy-10'-[(4-methoxyphenyl)methoxy]-8',15',15'-trimethyl-9'-oxo-13'-prop-2-enoxyspiro[oxirane-2,4'-tricyclo[9.3.1.03,8]pentadec-12-ene]-2'-yl] benzoate