8a-carbomethoxy-7,8-dioxo-5-methyl-1,4,4a,8a,-tetrahydronaphthalene-1-acetic acid ethyl ester 在
盐酸 、 lithium tri-t-butoxyaluminum hydride 作用下,
以63%的产率得到8a-carbomethoxy-8β-hydroxy-5-methyl-7(4H)-oxo-1,4a,8,8a-tetrahydronaphthalene-1-acetic acid ethyl ester