Catalyst-free reductive cyclization of bis(2-aminophenyl) disulfide with CO₂ in the presence of BH₃NH₃ to synthesize 2-unsubstituted benzothiazole derivatives

Abstract

An efficient and catalyst-free methodology for the reductive cyclization of various disulfides using BH3NH3 as a reductant and CO2 as a C1 resource was developed.

Molecular Engineering of Binder for Improving the Mechanical Properties and Recyclability of Energetic Composites

“…To prove the chemical structure of D2000-ADH-SS ( Figure S3 ), 1 H NMR was employed. The aromatic hydrogen characteristic peaks were similar to those of 2-aminothiophenol that appeared in [ 29 ], revealing the successful implantation of disulfide. Raman spectra of D2000-ADH-SS ( Figure S4 ) further proved the existence of disulfide bonds.…”

Benoxazolone-based ionic liquid catalyzed C–S bond construction for synthesis of benzothiazoles from 2-aminothiophenols and CO2 under ambient conditions

“…Benzothiazole and its derivatives, one kind of representative organosulfur compounds, are a very important class of chemical intermediates for a wide range of natural products and drugs due to their unique biological and pharmaceutical activities. 9 The general protocols for the synthesis of benzothiazoles are based on transition-metal-catalysed condensation reactions of 2-aminothiophenols with various C1 source compounds like ketones, aldehydes, nitriles, or 2-haloanilines with different S1 source reagents like isothiocyanates, sulfur, and thiols (as shown in Scheme 1a). 10 The chemical fixation of renewable CO 2 to benzothiazoles is a green and environmentally friendly reaction route.…”