Abstract

A convenient one-pot synthesis of [1]benzothieno[3,2- b]benzothiophene from readily available o-dihalostilbenes using combined reagents of sodium sulfide nonahydrate (Na 2S·9H 2O) or sodium hydrosulfide hydrate (NaSH· nH 2O) and sulfur is described along with plausible reaction paths in this intriguing reaction.

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