4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-2-fluorobenzoic acid methyl ester 在
sodium methylate 作用下,
以
metanol 为溶剂,
以25%的产率得到2-fluoro-benzoic acid,4-[(3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]