Abstract
AbstractAromatic diyne systems bearing one terminal propargylic acetate moiety and one tertiary propargylic alcohol subunit were converted in the presence of a gold catalyst. After an initial 1,2‐migration of the acetoxy group at the terminal alkyne, a gold carbenoid is formed which is then transferred onto the internal alkyne of the propargylic alcohol. This combination enables the use of propargylic acetates as precursors for a gold‐catalyzed pinacol‐type rearrangement. In the final pinacol‐like step the shift of an alkyl or aryl moiety onto an electrophilic gold carbenoid/cation terminates the reaction and 1‐naphthyl ketones are obtained as products. If electron‐rich aromatic backbones are used, a mechanistically interesting alternative pathway including a retro‐Buchner reaction is opened.magnified image
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