ETHYNYL CARBONIUM IONS. 2. REACTIONS OF 4-ETHYNYLPYRYLIUM PERCHLORATES WITH ALCOHOLS AND NITROGEN-CONTAINING NUCLEOPHILES

Article abstract of DOI:10.1007/BF00472537

Derivatives of β-alkoxy- and β-(phenylamino)styrylpyrylium salts, the hydrolysis of which leads to phenacylpyrylium salts and 4-benzoylmethylenepyrans, are formed in the reaction of 4-phenylethynylpyrylium salts with alcohols and aromatic amines.Ethynyl-s