pyridobenzothiazine acid derivatives was synthesized and their in vitro antibacterialactivity was evaluated. The 1,4-benzothiazine intermediates, which by Gould-Jacobs quinoline synthesis produced pyridobenzothiazine acids, were prepared by hydrolytic basic cleavage of substituted 2-aminobenzothiazoles and successive cyclocondensation with 1-bromo-2-chloroethane or alternatively with monochloroacetic acid, hence
SUBSTITUTED 2-BENZYLIDENE-2H-BENZO[b][1,4]THIAZIN-3(4H)-ONES, DERIVATIVES THEREOF, AND THERAPEUTIC USES THEREOF
申请人:Reddy E. Premkumar
公开号:US20140086941A1
公开(公告)日:2014-03-27
The present invention relates to compounds according to Formula I:
and salts thereof, wherein R
1
, R
2
, R
3
, R
4
, Ar, and n are as defined herein. Methods for preparing compounds of Formula I are also provided. The present invention further includes methods of treating cellular proliferative disorders, such as cancer, with the compounds of Formula I.
Copper-catalyzed one-pot synthesis of 1,4-benzothiazine-3-ones
作者:Lingyu Zhang、Songlin Zhang
DOI:10.1016/j.tetlet.2023.154761
日期:2023.10
An efficient potassium carbonate and copper-mediated CS and CN Ullmann coupling reaction between 2-bromothiophenol and 2-haloacetanilide is reported here. This protocol affords a simple and efficient approach for the construction of 1,4-benzothiazinone-3-one derivatives, avoiding the limitations of using noble metals and expensive ligands for the first time.
本文报道了 2-溴苯硫酚和 2-卤代乙酰苯胺之间有效的碳酸钾和铜介导的 C S 和 C N Ullmann 偶联反应。该方案为构建 1,4-苯并噻嗪酮-3-酮衍生物提供了一种简单有效的方法,首次避免了使用贵金属和昂贵配体的限制。
Dérivés hétérocycliques, leurs procédés de préparation,médicaments les contenant, utiles notamment comme inhibiteurs de l'aldose réductase
申请人:LABORATOIRES UPSA
公开号:EP0162776A2
公开(公告)日:1985-11-27
L'invention concerne de nouveaux composés de formule:
Inhibiteurs de l'aldose réductase. Traitement de certaines complications du diabète.