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Propiolate

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Pro´pi`o`late
n.1.A salt of propiolic acid.


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After the initial aza-Michael addition of the enaminic nitrogen to the propiolate, a potassium enolate bearing an allene functionality would be formed.
Most interestingly, methyl propiolate and 2,3-dimethyl-2-butene condense in the metals' coordination spheres to form cationic lactone-containing species in the manner depicted in eq 20, ie.
[ILLUSTRATION OMITTED] In order to probe the next stage of the reaction, samples of precatalyst were formed and treated with a range of alkynes, including the electron-deficient alkyne methyl propiolate and the typical PK substrate N-(prop-2-enyl)-N-(prop-2-ynyl)-p-toluenesulfonamide (Scheme 8) [10].
 
 
 
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