Methanesulfonic acid (5R,8S)-2-acetylamino-3,8-dimethyl-5-((R)-1-methyl-2-oxo-ethyl)-5,6,7,8-tetrahydro-naphthalen-1-yl ester 、 diphenyldiprenylphosphomium bromide 在
potassium tert-butylate 作用下,
以
乙二醇二甲醚 为溶剂,
反应 0.92h,
以90%的产率得到Methanesulfonic acid (5R,8S)-2-acetylamino-5-((E)-(S)-1,5-dimethyl-hexa-2,4-dienyl)-3,8-dimethyl-5,6,7,8-tetrahydro-naphthalen-1-yl ester