N-Phenylglycine is an organic compound with the formula C6H5NHCH2CO2H.

This white solid achieved fame as the industrial precursor to indigo dye.

[1] It is a non-proteinogenic alpha amino acid related to sarcosine, but with an N-phenyl group in place of N-methyl.

It is prepared by the Strecker reaction involving the reaction of formaldehyde, hydrogen cyanide, and aniline.

The resulting amino nitrile is hydrolyzed to give the carboxylic acid.