2-[(2'S,4aS,5R,8R,8aS)-5-hydroxy-2',4,4,8a-tetramethyl-7-methylidenespiro[1,2,3,4a,5,6-hexahydronaphthalene-8,5'-oxolane]-2'-yl]acetic acid 在
氨 、
sodium 、 sodium hydride 作用下,
以
乙醚 为溶剂,
反应 4.5h,
生成
(S)-3-Hydroxy-5-((4R,4aS,8aS)-4-hydroxy-2,5,5,8a-tetramethyl-3,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-3-methyl-pentanoic acid methyl ester