Rhodium(III)-Catalyzed Directed peri-C−H Alkenylation of Anthracene Derivatives

Jaganathan Karthikeyan and Naohiko Yoshikai*
Publication Date (Web): July 28, 2014 (Article)
DOI: 10.1021/ol501926b

ABSTRACT:

Rhodium(III)-catalyzed oxidative coupling reactions of anthracene-9-carboxylic acid derivatives with electron-deficient olefins are reported. A cationic rhodium(III) catalyst, in combination with a copper(II) oxidant, promotes selective monoalkenylation of anthracene-9-carboxamide, affording 1-alkenylanthracene-9-carboxamide in moderate to good yields. A similar catalytic system also promotes the reaction of anthracene-9-carboxylic acid and an electron-deficient olefin, which affords a lactone derivative through C−H alkenylation followed by intramolecular conjugate addition.

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