3-[2-(2-Quinoxalinyl)benzoxazol-5-yl]alanine derivative - A specific fluoroionophore for Ni(II)

3-[2-(2-Quinoxalinyl)benzoxazol-5-yl]alanine derivatives were synthesized. N-Boc-3-[2-(2-quinoxalinyl)benzoxazol-5-yl]alanine methyl ester (1) is a selective fluoroionophore for Ni(II) ion which as a very weak base in the ground and excited state is applicable at a wide range of pH.