56048-69-2Relevant academic research and scientific papers
An efficient and environmental benign synthesis of 2-benzimidazoles and 2-benzothiazoles using CeCl3-NaI as catalyst
Zhu, Xun,Wei, Yunyang
, p. 119 - 121 (2013/04/23)
A one-pot condensation of an aldehyde with 1,2-phenylenediamine or 2-aminothiophenol in dimethyl carbonate at 100°C under O2 in the presence of catalytic amounts of CeCl3-NaI gave an imine intermediate, which cyclised and dehydrogenated to give 2-arylbenzimidazoles or 2-arylbenzothiazoles in good yields.
Cyanide as a powerful catalyst for facile synthesis of benzofused heteroaromatic compounds via aerobic oxidation
Cho, Yeon-Ho,Lee, Chun-Young,Cheon, Cheol-Hong
, p. 6565 - 6573 (2013/07/26)
Highly efficient synthesis of benzofused heteroaromatic compounds via aerobic oxidation catalyzed by cyanide anion has been developed. The Schiff bases derived from 2-aminophenol and aldehydes provided the corresponding benzoxazoles in high yields in the presence of a catalytic amount of cyanide in an open flask under ambient conditions without the use of any external metal co-oxidants and bases. Furthermore, we have developed a catalytic sequential one-step protocol for the synthesis of benzoxazoles by adding a catalytic amount of NaCN to Schiff bases generated in situ from 2-aminophenol and aldehydes without the isolation of imine intermediates. This one-pot protocol was further extended to the synthesis of benzothiazoles from 2-aminothiophenol and aldehydes. A variety of aldehydes could be applied to this sequential one-pot protocol and the desired benzofused azole products were obtained in high yields.
Two birds with one stone: Redox co-production of 2-arylbenzothiazoles and hydroquinone
Li, Guiyun,Peng, Yanqing
experimental part, p. 45 - 48 (2010/08/05)
A variety of 2-arylbenzothiazoles are co-produced with hydroquinone in the absence of additional reagents and catalysts under mild conditions. When this inherently waste-free process is employed, none of the reactions require the use of additional redox reagents, and all of them are environmentally friendly with excellent atom economy (≥95%).
Control of acarids using certain benzothiazoles or benzothiazolines
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, (2008/06/13)
Compounds having either of the structures SPC1 Have strong acaricidal activity, in which R is a phenyl or naphthyl group, or phenyl with certain designated substitution. Thus, mites may be controlled on such crops as cotton by applying such compounds as 2-(1-naphthyl)benzothiazoline or 2-(5-t-butyl-2-hydroxyphenyl)benzothiazole.
