7-bromo-9-oxo-9H-xanthene-3-carboxylic acid methyl ester 、
9-oxo-xanthene-3-carboxylic acid methyl ester 在
7-Bromo-9-oxo-9H-xanthene-3-carboxylic acid 作用下,
以the title compound 7-bromo-9-oxo-9H-xanthene-3-carboxylic acid, 3f was obtained的产率得到7-Bromo-9-oxo-9H-xanthene-3-carboxylic acid