Transition-Metal-Free Cross-Coupling of Aryl and Heteroaryl Thiols with Arylzinc Reagents
作者:Bo Yang、Zhong-Xia Wang
DOI:10.1021/acs.orglett.7b03145
日期:2017.11.17
Cross-coupling of (hetero)arylthiols with arylzinc reagents via C–S cleavage was performed under transition-metal-free conditions. The reaction displays a wide scope of substrates and high functional-group tolerance. Electron-rich and -deficient (hetero)arylthiols and arylzinc reagents can be employed in this transformation. Mg2+ and Li+ ions were demonstrated to facilitate the reaction.
Selective construction of 2-substituted benzothiazoles from o-iodoaniline derivatives S8 and N-tosylhydrazone via a copper-promoted [3 + 1 + 1]-type cyclization reaction has been realized. In the protocol, the carbon atom on N-tosylhydrazone could be regulated to construct benzothiazole by changing the reaction system. Furthermore, the transformation has achieved the construction of multiple carbon-heteroatom
Water-promoted Dowex 50W catalyzed highly efficient green protocol for 2-arylbenzothiazole formation
作者:Chhanda Mukhopadhyay、Arup Datta
DOI:10.1002/jhet.9
日期:2009.1
aldehydes were allowed to react in one-pot operation to give 2-aryl-benzothiazoles in excellent yields in the presence of Dowex50W in water. Very high yields coupled with the ease of work-up procedure, formation of no side products, employment of “reusable” catalyst, and “green” synthesis in aqueous medium without maintaining anhydrous reaction conditions are the most important aspects of this methodology
Efficient 2,4,6-trichloro-1,3,5-triazine-catalyzed synthesis of 2-arylbenzothiazoles and bisbenzothiazoles by condensation of 2-aminithiophenol with aldehydes under mild conditions
2,4,6‐Trichloro‐1,3,5‐triazine efficiently catalyzed the condensation reactions between 2‐aminothiophenol and aromatic aldehydes to afford 2‐arylbenzothiazolles in good‐to‐excellent yields. Simple and mild reaction conditions, the use of a cheap catalyst and easy work up, and isolation are notable features of this method. J. Heterocyclic Chem., (2011).
Antidiabetic potential and enzyme kinetics of benzothiazole derivatives and their non-bonded interactions with α-glucosidase and α-amylase
作者:Ninad V. Puranik、Hemalata M. Puntambekar、Pratibha Srivastava
DOI:10.1007/s00044-016-1520-3
日期:2016.4
Benzothiazole derivatives were synthesized and their antidiabeticpotential evaluated using α-glucosidase, α-amylase, non-enzymatic glycosylation of hemoglobin and advanced glycation end product inhibition assays. Compound 3l showed low IC50 values of 0.31, 0.98, 0.59 and 0.19 mM in α-amylase, α-glucosidase, non-enzymatic glycosylation of hemoglobin and AGE inhibition assays, respectively, and outperformed