Conjugate addition of amino acid side chains to dyes containing aikynone, alkynoic ester and alkynoic amide linker arms

Article abstract of DOI:10.1016/S0040-4020(97)10324-6

Derivatives of fluorescein, 7-hydroxycoumarin, Sudan 1 and dansyl chloride with linker arms containing a conjugated terminal alkyne have been prepared. The Michael addition of the sulfanyl group of protected cysteine, the hydroxyl group of protected serine and the ε-amino group of protected lysine to the conjugated alkyne gave the expected heterosubstituted vinyl products.