6(R)-[2-[8(S)-(2,2-dimethylbutyryloxy)-2(S)-methyl-4a(S)-hydroxy-6-formyl-1,2,3,4,4a,7,8,8a(S)-octahydronaphthyl-1(S)]ethyl]-4(R)-t-butyl-dimethylsilyloxy-3,4,5,6-tetrahydro-2H-pyran-2-one 在
氢氟酸 作用下,
以
正己烷 、
乙腈 为溶剂,
生成
6(R)-[2-[8(S)-(2,2-dimethylbutyryloxy)-2(S)-methyl-6-formyl-1,2,3,7,8,8a(R)-hexahydronaphthyl-1(S)]-ethyl]-4(R)-hydroxy-3,4,5,6-tetrahydro-2H-pyran-2-one