(E)-7-(tert-Butyl-dimethyl-silanyloxy)-2-triethylsilanyloxy-hepta-1,3-diene 在
aluminum oxide 、 palladium diacetate 、 tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato)ytterbium 、
溶剂黄146 作用下,
生成
(5S,7R)-7-Methyl-1,6-dioxa-spiro[4.5]decan-9-one