A catalyst-free and additive-free method for the synthesis of benzothiazolethiones from <i>o</i>-iodoanilines, DMSO and potassium sulfide
作者:Xiaoming Zhu、Wenguang Li、Xiai Luo、Guobo Deng、Yun Liang、Jianbing Liu
DOI:10.1039/c8gc00477c
日期:——
Under catalyst-free and additive-free conditions, a novel, convenient, environment-friendly method for the synthesis of benzothiazolethiones from o-iodoanilines, K2S and DMSO has been developed.
Cleaner and greener synthesis of 3<i>H</i>-benzothiazole-2-thione and its derivatives
作者:Nitin Srivastava、Ram Kishore
DOI:10.1080/17415993.2020.1803321
日期:2021.1.2
A cleaner and greener method of synthesis of 3H-benzothiazole-2-thione is being reported in this communication. In this method, various o-iodoaniline derivatives are reacted with carbon disulfide in the presence of Cs2CO3 and tetramethyl ammonium bromide (TMAB) to give 3H-benzothiazole-2-thione and itsderivatives in higher yields. GRAPHICAL ABSTRACT
An efficientapproach to the synthesis of benzimidazole derivatives has been achieved by copper-catalyzed double C–N bonds formation of N-alkyl-2-iodoaniline and sodium azide. The reaction was supposed to proceed throughcopper-catalyzed tandem reaction of SNAr reaction, aerobic oxidation of C(sp3)–H bond and intramolecular C–N bond formation sequence. Structurally diverse 2-aryl, alkenyl and alkyl
A copper catalyzed three-component reaction was developed for the synthesis of benzothiazolones. In the presence of CuBr2, the reaction of o-iodoanilines and K2S with DMF proceeded smoothly and generated the corresponding benzothiazolones with good isolated yields. DMF functioned both as the carbon monoxide source and as the reaction medium in this reaction.