(2,3-dihydroxybenzoyl)hydrazinecarboxylic acid, t-butyl ester 、
乙醚 、 TFA*anisole 在
(2,3-dihydroxybenzoyl)hydrazine, trifluoroacetate salt 、
乙醚 、 silica gel 作用下,
反应 0.5h,
以17.2 g of (2,3-dihydroxybenzoyl)hydrazine, trifluoroacetate salt were obtained as beige, fine crystals的产率得到(2,3-dihydroxybenzoyl)hydrazine, trifluoroacetate salt