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
8-氯-5-甲氧基/ 8-氯-4H-1,4-苯并噻嗪,通过缩合合成,随后用2-氨基-6-氯-3-甲氧基/ 2-氨基-3-氯苯硫酚的氧化环化β -二甲亚砜存在下的二酮/ β-酮酸酯。通过在冰醋酸中用30%过氧化氢处理4H-1,4-苯并噻嗪,合成了4H-1,4-苯并噻嗪-1,1-二氧化物(砜)。4H-1,4-苯并噻嗪还被用作与β -D-呋喃核糖-1-乙酸-2,3,5-三苯甲酸酯反应制备呋喃核糖苷的碱。所有合成的化合物均已通过光谱和元素分析进行了表征,并已进行了抗菌和驱虫活性检查。 4H-1,4-苯并噻嗪,含氮和硫的杂环可通过缩合,然后在β-二酮/ β-酮酸酯的二甲基亚砜中氧化2-氨基苯硫酚进行环化反应制得。然后将这些化合物用作制备呋喃核糖核苷及其砜的碱。