methyl 3-(4-chloro-2-fluoro-5-methoxyphenyl)-4-aminoisothiazole-5-carboxylate 、 、
亚硝酸特丁酯 在
crude product 、 silica gel—cyclohexane ethyl acetate 作用下,
以
乙腈 为溶剂,
反应 16.5h,
以Furthermore, 1.1 g (29%) of methyl 3-(4-chloro-2-fluoro-5-methoxyphenyl)isothiazole-5-carboxylate 8 (m.p. 139-142° C.) were obtained的产率得到methyl 3-(4-chloro-2-fluoro-5-methoxyphenyl)isothiazole-5-carboxylate