A number of derivatives of histidyltyrosine, histidylserine, histidylglycine, seryltyrosine, tyrosylserine, tyrosylhistidine and serylglycylhistidine have been prepared by adaptation of the Curtius azide route. In the course of the work methods for the preparation of L-histidyl peptides employing carbobenzoxy-L-histidine azide or carbobenzoxyglycyl-L-histidine azide were developed.
![3-(4-hydroxyphenyl)-2-[(3-hydroxy-2-phenylmethoxycarbonylamino-propanoyl)amino]propanoic acid Structure](https://image.chemsrc.com/caspic/195/52885-18-4.png)
