TY - JOUR A1 - Singh, Dharmender A1 - Kumar, Vipin A1 - Singh, Virender T1 - Et3N-DMSO Supported One-pot Synthesis of Highly Fluorescent β-Carboline Linked Benzothiophenones via Sulphur Insertion and Estimation of Their Photophysical Properties JF - Beilstein Archives Y1 - 2020/// SN - M3 - doi:10.3762/bxiv.2020.52.v1 N2 - A robust transition metal-free strategy is presented to access novel β-carboline tethered benzothiophenone derivatives from 1(3)-formyl-β-carbolines using elemental sulphur activated by Et3N/DMSO. This expeditious catalyst-free reaction proceeds through the formation of β-carboline based 2-nitrochalcones followed by incorporation of sulphur to generate the multifunctional β-carboline linked benzothiophenones in good to excellent yields. The synthetic strategy can also be extended towards the synthesis of β-carboline linked benzothiophenes. Moreover, the products as afforded thereof emerged as promising fluorophores and displayed excellent light-emitting properties with quantum yield (ΦF) upto 47%. ER -