2-[2-((Z)-6-Methoxy-5-oxo-hex-3-enyl)-[1,3]dioxolan-2-yl]-propionaldehyde 在
sodium methylate 、
zircornium(IV) n-propoxide 作用下,
生成
rac-(3aR,7aS)-6-methoxy-7a-methyl-2,3,3a,7a-tetrahydrospiro[indene-1,2'-[1,3]dioxolan]-5(4H)-one 、 rac-(3aR,7aS)-6-methoxy-7a-methyl-2,3,3a,7a-tetrahydrospiro[indene-1,2'-[1,3]dioxolan]-5(4H)-one