(8'R,9'S,13'S,14'R,15'S)-3'-methoxy-13'-methylspiro[1,3-dioxolane-2,17'-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene]-15'-carbaldehyde 、
苄胺 在
sodium tetrahydroborate 作用下,
以
甲醇 、
四氢呋喃 为溶剂,
反应 0.5h,
以92%的产率得到N-benzyl-1-[(8'R,9'S,13'S,14'R,15'S)-3'-methoxy-13'-methylspiro[1,3-dioxolane-2,17'-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene]-15'-yl]methanamine