To discover an efficient and convenient method to synthesize C2-arylacylated benzothiazoles as potential drug scaffolds, a novel [bis(trifluoroacetoxy)iodo]benzene(PIFA)/KOH synergistically promoted direct ring-opening C2-arylacylation reaction of 2H-benzothiazoles with aryl methyl ketones has been developed. Various substrates were tolerated under optimized conditions affording the C2-arylacylation
New synthesis of 2-aroylbenzothiazoles <i>via</i> metal-free domino transformations of anilines, acetophenones, and elemental sulfur
作者:Tien V. Huynh、Khang V. Doan、Ngoc T. K. Luong、Duyen T. P. Nguyen、Son H. Doan、Tung T. Nguyen、Nam T. S. Phan
DOI:10.1039/d0ra01750g
日期:——
A new synthesis of 2-aroylbenzothiazoles via iodine-promoted domino transformations of anilines, acetophenones, and elemental sulfur was demonstrated. The highlights of this tandem synthesis are (1) easily available anilines and acetophenones as feedstock; (2) transition metal-free conditions; (3) inexpensive, nontoxic, easy handling, and abundant elemental sulfur as a building block. This synthetic
Microwaveirradiation (MW) and ionic liquids (ILs) are two of the most promising relatively greener synthetic approaches to preparing value-added chemicals. Herein, a series of 2-acylbenzothiazole derivatives were synthesized for the first time from commercially available α-bromoacetophenones and disulfane-diyl-dianilines through the cooperation of ionic liquids and microwaveirradiationunder metal-
微波辐射(MW)和离子液体(IL)是制备增值化学品的两种最有前途的相对绿色合成方法。在此,首次以市售α-溴苯乙酮和二硫烷-二基-二苯胺为原料,在无金属和额外添加剂的条件下,通过离子液体和微波辐射的配合合成了一系列2-酰基苯并噻唑衍生物。已经提出了一种涉及连续 IL 诱导烯醇化的合理机制。