3622-23-9Relevant academic research and scientific papers
Preparation method of 2,6'-dichlorobenzothiazole
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Paragraph 0014-0025, (2019/08/30)
The invention discloses a preparation method of 2,6'-dichlorobenzothiazole, and belongs to the technical field of organic chemistry. The method comprises the following steps: using 2-amino-6-chlorobenzothiazole as a raw material and acetonitrile as a solvent, adding copper chloride and isoamyl nitrite, carrying out a reaction to form a mixture of 2,6'-dichlorobenzothiazole and other impurities, and carrying out column chromatography separation to obtain pure 2,6'-dichlorobenzothiazole at a yield of 45-66%. The preparation method makes up for the deficiency of existing synthesis processes, andprovides a new method for synthesizing the 2,6'-dichlorobenzothiazole.
Preparation, antibacterial evaluation and preliminary structure-activity relationship (SAR) study of benzothiazol- and benzoxazol-2-amine derivatives
Ouyang, Liang,Huang, Yuhui,Zhao, Yuwei,He, Gu,Xie, Yongmei,Liu, Jie,He, Jun,Liu, Bo,Wei, Yuquan
, p. 3044 - 3049 (2012/06/04)
In this study, a novel benzothiazol- and benzooxazol-2-amine scaffold with antibacterial activity was designed and synthesized. Preliminary structure-activity relationship analysis displayed that compound 8t with a 5,6-difluorosubstituted benzothiazole was found to be a potent inhibitor of Gram-positive pathogens, and exhibited some potential against drug-resistant bacteria and without cytotoxicity in therapeutic concentrations. In addition, molecular docking studies indicated that Staphylococcus aureus methionyl-tRNA synthetase might be the possible target of these compounds. Taken together, the present study provides an effective entry to the synthesis of a good lead for subsequent optimization and a new small molecule candidate drug for antibacterial therapeutics.
Synthesis and antibacterial evaluation of a novel series of 2-(1,2-dihydro-3-oxo-3H-pyrazol-2-yl)benzothiazoles
Stella, Alessandro,Segers, Kenneth,De Jonghe, Steven,Vanderhoydonck, Bart,Rozenski, Jef,Anne, Jozef,Herdewijn, Piet
experimental part, p. 253 - 265 (2011/09/30)
The 2-(1,2-dihydro-3-oxo-3H-pyrazol-2-yl)benzothiazole scaffold was selected as a central core structure for the discovery of novel antibacterial compounds. A systematic variation of the substituents on the oxo-pyrazole moiety, as well as on the benzo moiety, led to the creation of a small and focused library of benzothiazoles that was subjected to antibacterial screening. In a first round of screening, activity of the compounds against six representative microorganisms was established. For the most potent congeners, MIC values against S. aureus and P. aeruginosa were determined. The structure-activity relationship study clearly revealed that subtle structural variations influence the antibacterial activity to a large extent. The most potent congeners displayed MIC values of 3.30 μM.
A mild and efficient one-pot synthesis of 2-aminated benzoxazoles and benzothiazoles
Stewart, Gavin W.,Baxter, Carl A.,Cleator, Ed,Sheen, Faye J.
supporting information; experimental part, p. 3229 - 3231 (2009/08/15)
Previous syntheses of the biologically active 2-aminated benzoxazoles have relied on forcing thermal conditions to generate the products directly from the corresponding thiols. The resulting yields have ranged from moderate to poor. A mild and high-yielding alternative one-pot chlorination-amination procedure is described. Compounds with a variety of substitution patterns are reported and the methodology has been successfully extended to benzothiazoles. Palladium catalysis on suitably activated examples has been employed to generate the desired compounds of interest.
Ferulic acid and benzothiazole dimer derivatives with high binding affinity to β-amyloid fibrils
Byeon, Seong Rim,Jin, Yun Jung,Lim, Soo Jeong,Lee, Ji Hoon,Yoo, Kyung Ho,Shin, Kye Jung,Oh, Seung Jun,Kim, Dong Jin
, p. 4022 - 4025 (2008/02/07)
New ferulic acid and benzothiazole dimer derivatives were synthesized and evaluated by in vitro competition assay using [125I]TZDM for their specific binding affinities to Aβ fibrils. In particular, 4a showed the most excellent binding affinity (Ki = 0.53 nM), compared to PIB (Ki = 0.77 nM), for benzothiazole binding sites of Aβ1-42 fibrils. This result suggests a possibility of a potential AD diagnostic probe for detection of Aβ fibrils.
Process for the manufacture of 2,6-dichlorobenzoxazole and 2,6-dichlorobenzthiazole
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, (2008/06/13)
A process for the manufacture of 2,6-dichlorobenzoxazole and 2,6-dichlorobenzthiazole by chlorinating K+ or Na+ salts of 6-chloro-2-mercaptobenzoxazole or of 6-chloro-2-mercaptobenzthiazole in halogenated hydrocarbons as suspending agents.
