(4a'S,7a'R,12b'S)-7'-(cyclopropylmethyl)-11'-methoxy-12b'-vinyl-3',4',7',7a',8',12b'-hexahydrospiro[1,3-dioxolane-2,2'-phenanthro[9,8a-d][1,3]oxazol]-6'(1'H)-one 在
臭氧 、
二甲基硫 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以80%的产率得到(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