Abstract
A new, transition-metal-free, domino synthesis of 2-substituted benzothiazoles has been developed, involving base-promoted one-pot addition of active methylene compounds to o-iodoarylisothioacyanates and subsequent intramolecular C-S bond formation of the resulting thioamidate anion. The reaction proceeds at room temperature within 1-3 h, affording diversely substituted benzothiazoles in high yields. A possible radical intermediate pathway, via an SRN1 mechanism, has been proposed for intramolecular C-S bond formation.
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