135907-86-7

Upstream product

• 128017-43-6 3-Methyl-2-(2-oxo-2-phenyl-ethyl)-[1,2,3]triazolo[1,5-a]pyridin-2-ium; bromide 
• 623-47-2 propynoic acid ethyl ester 

Relevant academic research and scientific papers

Triazolopyridines. Part 11. Ylides derived from 2-acylmethyltriazolopyridinium salts

Ylides derived from 2-acylmethyltriazolopyridinium salts (2a) -(2c) react with methyl or ethyl propiolate and with dimethyl acetylenedicarboxylate to give ylides (3a)-(3e), (6) or (7). In some cases 1:2 adducts are formed, shown to be the novel ylides (8a)-(8d); an X-ray diffraction confirms structure (8a).