Preparation of 1-azulenyl ketones was achieved by metal-free hydration of 1-azulenylalkynes using trifluoroacetic acid as a Brønsted acid in good to excellent yields. The reaction was accomplished at a relatively low temperature with complete regioselectivity and compatibility of several functional groups.
T. Shoji, M. Tanaka, T. Araki, S. Takagaki, R. Sekiguchi and S. Ito, RSC Adv., 2016, 6, 78303 DOI: 10.1039/C6RA20010A
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