3-Amino-3-alkoxyphenylpropionic acids, prepared from alkoxybenzaldehydes, are cyclized in one step into 3-aminoindan-1-ones using trifluoroacetic acid and trifluoroacetic anhydride.
Effective antihypoxic activity of new aminocyclopentanones which was higher than that of the reference compounds has been demonstrated by the SCR hypoxia test.