
%0 Journal Article
%A Lok, WN 
%A Ward, AD 
%T Acetylenic acids. III. The synthesis of pyridylpropiolic acids and esters and their reaction with thionyl chloride
%J Australian Journal of Chemistry
%D 1978/03/01
%V 31
%N 3
%P 617-625
%K 
%R https://doi.org/10.1071/CH9780617
%U https://www.publish.csiro.au/paper/CH9780617 
%X A variety of synthetic routes to pyridinylpropiolic acids and esters have been investigated. The most convenient route to the esters involves the formation of the corresponding ethyl 3-oxo-3-pyridinyl-2-triphenylphosphoranediylpropanoates and their subsequent pyrolysis. The acids can be obtained by careful hydrolysis of the esters. The reaction of thionyl chloride with these compounds has been examined; in one case a low yield of a thieno[2,3-b]pyridine was obtained. 
