2-氨基苯硫醇 、
2-bromo-1-(3,4-dihydroxy-5-nitro-phenyl)-ethanone 在
N,N-dimethylformamide methanol 作用下,
以
乙醇 为溶剂,
反应 1.0h,
以There is obtained 5-(2H-1,4-benzothiazin-3-yl)-3-nitropyrocatechol of m.p. 302°-304° (from N,N-dimethylformamide/methanol)的产率得到5-(2H-1,4-benzothiazin-3-yl)-3-nitropyrocatechol