2,6-dimethyl-6-acetoxy-4-isobutyryl-3-hydroxy-2,4-cyclohexadien-1-one 在
cesium hydroxide 作用下,
以
甲醇 为溶剂,
以35%的产率得到(1S,2R,6R,7R,8R,9R)-5,6,9-Trihydroxy-12-[1-hydroxy-2-methyl-prop-(E)-ylidene]-2-isobutyryl-1,4,6,9-tetramethyl-tricyclo[6.2.2.0
2,7]dodec-4-ene-3,10,11-trione