The RG Dipeptides were condensated from N-protected Arg and C-protected Gly by mixed anhydrides method.Then Asp and RG Dipeptides were used synthesize RGD Tripeptides in liquid phase.

• 由N-保护的精氨酸、C-保护的甘氨酸采用混合酸酐法缩合成RG二肽,再与天冬氨酸在液相中合成RGD三肽。