Gf. Zhao et al., STUDIES ON THE SYNTHESIS AND BIOLOGICAL-A CTIVITY OF THE DERIVATIVES OF ALKOXYLCARBONYL)-2H-1,2-BENZOTHIAZINE-1,1-DIOXIDES, Gaodeng xuexiao huaxue xuebao, 17(10), 1996, pp. 1565-1569
In this paper 20 new derivatives were synthesized by the reaction of 4
-hydroxyl-3-acyl alkoxylcarbonyl)-2H-1,2-benzothiazine-1,1-dioxides (I
I a-c) with aryl isocyanates, phenyl hydrazine, methyl chloroformate a
nd ethylene glycol, and the reaction of compounds II a-c with aryl iso
cyanates was studied under the different molar ratios of strong base N
aH. Their structures were characterized by H-1 NMR, IR and elementary
analysis. The biological tests indicated that the majority. showed goo
d herbicidal activity and plant-growth regulating activity.