(2E,4E,6E)-5-Methyl-7-((1S,4R)-6,7,7-trimethyl-2,3-dioxa-bicyclo[2.2.2]oct-5-en-1-yl)-hepta-2,4,6-trienoic acid methyl ester 在
aluminum oxide 作用下,
以
苯 为溶剂,
生成
(2E,4E,6E)-7-(1-Hydroxy-2,6,6-trimethyl-4-oxo-cyclohex-2-enyl)-5-methyl-hepta-2,4,6-trienoic acid methyl ester