Synthesis of 4H-1,4-benzothiazine-1,1-dioxides (sulfones) and phenothiazine-5,5-dioxides (sulfones)
The study of the oxidation behavior of 4H-1,4-benzothiazines and phenothiazines by 30% hydrogen peroxide in acetic acid results in the formation of 4H-1,4-benzothiazine-1,1-dioxides (sulfones) and 10H-phenothiazine-5,5- dioxides (sulfones) respectively. T
Kachhee, Thandi Lal,Gupta, Vandana,Gautam,Gupta
p. 2225 - 2234
(2007/10/03)
Synthesis of 7-ethoxy-3-methyl-4h-1,4-benzothiazines
Synthesis of 4H-1,4-benzothiazines is reported by the condensation of 5-ethoxy-2-aminobenzethiol with β-diketones in DMSO. 2-Aminobenzenethiol readily oxidized to bis-(2-aminophenyl)disulfide which on reaction with β-diketones cyclizes to 4H-1,4-benzothia