| 摘要 |
<p>4-Hydroxy 2-methyl 2H-1,2-benzothiazine 1,1-dioxide 3-carboxamide of general formula (I), in which R can be various gps., is made by reaction of the hydrazine of formula (II) with an amine RNH2 in an inert organic solvent e.g. benzene opt. mixed with other solvents, in presence of an oxidising agent e.g. yellow mercuric oxide, at between ambient temp. and b.pt.</p> |
