N-(2,2-二烷氧基乙基)-1,4-苯并噻嗪内酰胺2和1,4-苯并噻嗪-砜10的环化反应生成相应的吡咯并[1,2,3- de ] -1,4-苯并噻嗪4分别通过使用二恶烷/对甲苯磺酸或多磷酸/氯仿体系来制备图12和12所示的化合物。相反,在相同的反应条件下,1,4-苯并噻嗪5a-h不能提供预期的吡咯并苯并噻嗪7,至于5c-h,获得了大量的2-氨基-苯基-硫化物8。报告了微生物测定的结果。
Use of (Z)-β-(2-Fluorobenzenesulfonyl)vinylamines as Novel Synthons in the Synthesis of 1,4-Benzothiazine Derivatives
摘要:
A novel synthetic route for arylated 1,4-benzothiazine derivatives has been developed. This method utilizes a key intramolecular nucleophilic aromatic substitution step of the corresponding (Z)-beta-(2-fluorobenzenesulfonyl) vinylamine intermediate to construct the benzothiazine ring. A wide range of aryl and heteroaryl substituent groups can be installed from commercial boronic acids. Both mono-and diarylated products have been synthesized in good yields and with good functional group tolerance.
From Phenothiazine to 3-Phenyl-1,4-benzothiazine Derivatives as Inhibitors of the <i>Staphylococcus aureus</i> NorA Multidrug Efflux Pump
作者:Stefano Sabatini、Glenn W. Kaatz、Gian Maria Rossolini、David Brandini、Arnaldo Fravolini
DOI:10.1021/jm701623q
日期:2008.7.1
Overexpression of effluxpumps is an important mechanism by which bacteria evade effects of substrate antimicrobial agents and inhibition of such pumps is a promising strategy to circumvent this resistance mechanism. NorA is a Staphylococcusaureusmultidrugeffluxpump, the activity of which confers decreased susceptibility to many structurally unrelated agents, including fluoroquinolones, resulting
High yield synthesis of 4<i>H</i>-1,4-benzothiazine-1,1-dioxide derivatives
作者:Stefania De Montis、Claudia Fattuoni、Enzo Cadoni、Maria G. Cabiddu、Michele Usai、Salvatore Cabiddu
DOI:10.1002/jhet.5570450530
日期:2008.9
4H-1,4-Benzothiazine-1,1-dioxidederivatives were synthesized through a sequence of almost quantitative reactions. The commercial starting material 2-(methylsulfanyl)aniline was Boc-protected, N-acylated and oxidized at the sulfur atom to obtain a sulfonyl derivative. An anionic transposition of the acyl group followed by asimultaneous deprotection-cyclization gave the title products in excellent yields
通过一系列几乎定量的反应合成了4 H -1,4-苯并噻嗪-1,1-二氧化物衍生物。将商品原料2-(甲基硫烷基)苯胺进行Boc保护,N-酰化并在硫原子上氧化以获得磺酰基衍生物。酰基的阴离子转座,然后同时进行脱保护-环化,可以以优异的收率得到标题产物。所有产品和中间体均经过充分表征。
One-Pot Domino Reaction: Direct Access to Polysubstituted 1,4-Benzothiazine 1,1-Dioxide via Water–Gas Shift Reaction Utilizing DMF/H<sub>2</sub>O
作者:Yogesh Sharma、Ganesh P. Pawar、Vinod D. Chaudhari
DOI:10.1021/acs.joc.2c02171
日期:2023.1.6
Benzothiazine 1,1-dioxide (BTDO) is a privileged chemical motif, and its metal-free domino access is in high demand. Current BTDO production methods require costly metal catalysts or harsh reaction conditions. A facile domino approach to BTDO via a water–gas shift reaction (WGSR) employing sodium 2-nitrobenzenesulfinates and α-bromo ketones is presented. This strategy is cost-effective and environmentally