Two birds with one stone: redox co-production of 2-arylbenzothiazoles and hydroquinone

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%). Graphical Abstract