N-Phenylglycine

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.

N-Phenylglycine
Names
IUPAC name
2-Anilinoacetic acid
Other names
Anilinoacetic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.002.792
EC Number
  • 203-070-2
UNII
Properties
C8H9NO2
Molar mass 151.165 g·mol−1
Appearance white solid
Melting point 127–128 °C (261–262 °F; 400–401 K)
Hazards
GHS pictograms
GHS Signal word Warning
H315, H319, H335
P261, P264, P271, P280, P302+352, P304+340, P305+351+338, P312, P321, P332+313, P337+313, P362, P403+233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

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.[2]

Pfleger's historic synthesis of indigo using N-phenylglycine

See also

References

  1. Helmut Schmidt (1997). "Indigo – 100 Jahre industrielle Synthese". Chemie in Unserer Zeit. 31 (3): 121–128. doi:10.1002/ciuz.19970310304.
  2. Elmar Steingruber "Indigo and Indigo Colorants" Ullmann's Encyclopedia of Industrial Chemistry 2004, Wiley-VCH, Weinheim. doi: 10.1002/14356007.a14_149.pub2
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