Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Reaction between 2-alkyl-4-arylbut-3-yn-2-ols and guanidine in refluxing pyridine affords 2-amino-5,5-dialkyl-4-arylmethylidene-2-oxazolines. ... Acetylene Chemistry: Chemistry, Biology and Material Science, eds. F. Diederich, PJ Stang and RR Tykwinski, Wiley-VCH, ...