Add time:08/25/2019         Source:sciencedirect.com

The boron trifluoride-etherate mediated cyclization of 2-arylthio-ketones 1a-h at ambient temperature gave 3-aryl-substituted benzothiophenes 2a-h in excellent yield. None of the rearranged 2-aryl-substituted benzothiophenes were observed.

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