The Ireland-Claisen rearrangement of propargyl ynamido ester substrates is reported. The expected allenamide carboxylic acid products from [3,3]-sigmatropic rearrangement are not isolated, with 2-amidodienes alternatively formed in good yield with high levels of stereocontrol after decarboxylation.
Heffernan, S. J., & Carbery, D. R. (2012). Ireland-Claisen rearrangement of ynamides: Stereocontrolled synthesis of 2-amidodienes. Tetrahedron Letters, 53(38), 5180-5182. https://doi.org/10.1016/j.tetlet.2012.07.088