2024
DOI: 10.1021/acs.joc.4c00017
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Oxidative Dehydroxycyclization of Catechols with o-Mercaptoanilines to Access 1-Hydroxyphenothiazines

Hanyu Zhou,
Xuchen Shang,
Wenhao Li
et al.

Abstract: The protocol of aerobic oxidative dehydroxycyclization installed in the synthesis of rarely studied 1hydroxyphenothiazines from catechols and o-mercaptoanilines is presented. Utilizing a natural renewable low-toxicity gallic acid as an organocatalyst, this established transformation proceeded smoothly in an aqueous ethanol solution under mild conditions with good functional group compatibility and up to a 94% isolated yield. This protocol is also characterized by its operational simple workup involving only re… Show more

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