a method for producing an indan derivative represented by the formula : ## str1 ## by condensing an n -- α - amino acid with an n - glycine alkyl or aralkyl ester in the presence of a diphenyl phosphorochloridate , and a method for producing another indan derivative having anti - hypertensive activity by using the above intermediate indan derivative are useful for industrial production of the indan derivative having anti - hypertensive activity .