carbonic acid 5-(4-cyanophenyl)-3-methylfuran-2-yl ester phenyl ester 在
acetic acid (1R)-1-(4-dimethylaminopyridin-3-yl)-2,2,2-triphenylethyl ester 作用下,
以
乙醚 为溶剂,
反应 24.0h,
生成 (R)-5-(4-Cyano-phenyl)-3-methyl-2-oxo-2,3-dihydro-furan-3-carboxylic acid phenyl ester 、 (S)-2-(4-Cyano-phenyl)-4-methyl-5-oxo-2,5-dihydro-furan-2-carboxylic acid phenyl ester 、 (R)-2-(4-Cyano-phenyl)-4-methyl-5-oxo-2,5-dihydro-furan-2-carboxylic acid phenyl ester