Atom-economical and workup-free multiparticipation of p‑TsOH in yne-ynamides skeletal reshuffle: Access to regiospecific, chemospecific, and stereospecific (E)‑alkenyl sulfonate/ketone– tethered indoles

Transition metal–free organic transformations that do not involve/generate hazardous waste are of great interest in organic synthesis. In this regard, p-toluenesulfonic acid monohydrate (p-TsOH·H2O) is an ecofriendly for synthesizing diverse...