methanesulfonic acid 2-(4-(trifluoromethyl)phenyl)ethyl ester 、
[3-(3-cyclobutylmethyl-2,4-dioxo-1,3,8-triazaspiro[4.5]dec-8-yl)phenyl]acetic acid tert-butyl ester 在
potassium fluoride on basic alumina 作用下,
以
乙二醇二甲醚 为溶剂,
反应 8.0h,
生成 (3-{3-cyclobutylmethyl-2,4-dioxo-1-[2-(4-trifluoromethylphenyl)ethyl]-1,3,8-triazaspiro[4.5]dec-8-yl}phenyl)acetic acid tert-butyl ester