ethyl 3-methyl-5-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-ylsulphonyl)pent-2-en-4-ynoate 在
sodium hydroxide 作用下,
以
四氢呋喃 、
正庚烷 为溶剂,
以44%.的产率得到3-Methyl-5-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-ylsulphonyl)pent-2-en-4-ynoic acid