4-Hydroxy-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxides and salts
申请人:Boehringer Ingelheim GmbH
公开号:US04233299A1
公开(公告)日:1980-11-11
Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, methyl or ethyl; R.sub.2 is methyl, ethyl or n-propyl; and Y is hydrogen, methyl, methoxy, fluorine or chlorine; and non-toxic, pharmacologically acceptable salts thereof formed with an inorganic or organic base. The compounds as well as their salts are useful as antiphlogistics.
4-Hydroxy-N-(5((substituted hetero) methyl)-3-isoxazolyl-2H-1,2-benzothiazine-3-carboxamide,1,1-dioxide and 4-hydroxy-2-alkyl-N-(5-((substituted hetero) methyl)-3-isoxazolyl)2H-1,2-benzothiazine-3-carboxamide,1,1-dioxide
申请人:WARNER-LAMBERT COMPANY
公开号:EP0123418A1
公开(公告)日:1984-10-31
4-Hydroxy-N-[5-[(substituted hetero) methyl]-3-isoxazolyl]-2H-1,2-benzothiazine-3-carboxamide 1,1- dioxides as agents for treating pain in mammals resulting from inflammation are disclosed. Also disclosed are processes for their production and pharmaceutical compositions comprising the new compositions.
Ru
<sup>II</sup>
(η
<sup>6</sup>
‐
<i>p</i>
‐cymene) Complexes of Bioactive 1,2‐Benzothiazines: Protein Binding vs. Antitumor Activity
作者:Adnan Ashraf、Mario Kubanik、Farhana Aman、Hannah Holtkamp、Tilo Söhnel、Stephen M. F. Jamieson、Muhammad Hanif、Waseeq Ahmad Siddiqui、Christian G. Hartinger
DOI:10.1002/ejic.201501361
日期:2016.3
Abstract1,2‐Benzothiazine‐3‐carboxamide 1,1‐dioxide derivatives such as meloxicam are known to display numerous pharmacological activities. We prepared a series of 4‐hydroxy‐2‐alkyl‐2H‐benzo[e][1,2]thiazine‐3‐carboxamide 1,1‐dioxide ligands 1a–f and their Ru(η6‐p‐cymene) complexes 2a–f, inspired by synergistic effects observed with other bioactive ligands coordinated to metal centres. The molecular structures of 1a, 2a, and 2b were determined by X‐ray diffraction analyses. The stability of the metal complexes was characterized in DMSO and DMSO/H2O on the basis of 1H NMR spectroscopy and their protein binding capabilities were studied using mass spectrometry. In vitro cytotoxicities of the Ru complexes were determined against human colorectal carcinoma (HCT116), non‐small cell lung carcinoma (NCI‐H460) and cervical carcinoma (SiHa) cell lines. The low levels of biological activity observed for these Ru complexes were put into context by considering their chemical reactivity with proteins. The binding of proteins resulted in cleavage of the benzothiazine backbone when the complex was present in concentrations equimolar with respect to protein.