Stereochemistry of the ethoxyethynyl carbinol–αβ-unsaturated ester conversion
Abstract
Carbon dioxide in ethanol rearranges the ethoxyethynyl carbinol derivatives of ketones in the 1-tetralone, indan-1-one, and 2,3-dihydrophenanthren-4(1H)-one series to yield predominantly the cis-αβ-unsaturated esters.