An efficient synthesis and biological study of substituted 8-chloro-5-methoxy/8-chloro-4H-1,4-benzothiazines, their sulphones and ribofuranosides
作者:NISHIDHA KHANDELWAL、ABHILASHA、NAVEEN GAUTAM、D C GAUTAM
DOI:10.1007/s12039-013-0363-4
日期:2013.1
synthesized by condensation followed by oxidative cyclisation of 2-amino-6-chloro-3-methoxy/2-amino-3-chlorobenzenethiol with β–diketones/β–ketoesters in the presence of dimethyl sulphoxide. By treating 4H-1,4-benzothiazines with 30% hydrogen peroxide in glacial acetic acid, 4H-1,4-benzothiazine-1,1-dioxides (sulphones) were synthesized. The 4H-1,4-benzothiazines have also been used as a base to prepare
Synthesis And Biological Activity Of Substituted 4<i>H</i>-1,4-Benzothiazines, Their Sulfones, And Ribofuranosides
作者:Kshamta Goyal、Naveen Gautam、Nishidha Khandelwal、D. C. Gautam
DOI:10.1080/15257770.2013.765012
日期:2013.1
The present article describes the synthesis of new 4H-1,4-benzothiazines via condensation and oxidative cyclization of substituted 2-aminobenzenethiols with β-diketones/β-ketoesters in dimethyl sulfoxide. The oxidation of these synthesized 4H-1,4-benzothiazines with 30% hydrogen peroxide in glacial acetic acid yielded 4H-1,4-benzothiazine sulfones and the reaction of these synthesized benzothiazines