(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 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 15.0h,
以63%的产率得到(R, Z)-N-(cyclopropylmethyl)-6'-methoxy-1',4',9',10'-tetrahydro-2'H-spiro[1,3-dioxolane-2,3'-phenanthren]-10'-amine