Design and Concise Synthesis of Fully Protected Analogues of <scp>l</scp>-γ-Carboxyglutamic Acid
作者:Sheng Jiang、Peng Li、Christopher C. Lai、James A. Kelley、Peter P. Roller
DOI:10.1021/jo061037q
日期:2006.9.1
The design and synthesis of four nonnaturally occurring amino acid analogues of l-γ-carboxyglutamic acid (Gla), appropriately protected for Fmoc-based solid-phase peptide synthesis (SPPS), is described. These amino acids are Bu-Mal 2, BCAH 3, Pen-Mal 4, and Cm-Gla 5. These Gla analogues have been designed to replace the glutamic acid of position 1 in the cyclic decapeptide G1TE, which is a potent inhibitor
的设计与四个非天然存在的氨基酸类似物合成升- γ羧基谷氨酸(GLA),适当保护的用于基于Fmoc的固相肽合成(SPPS),进行说明。这些氨基酸是Bu-Mal 2,BCAH 3,Pen-Mal 4和Cm-Gla 5。这些Gla类似物已被设计成取代环状十肽G1TE中位置1的谷氨酸,环状十肽G1TE是酪氨酸激酶的有效抑制剂,以进一步增强与信号转导受体的Grb2-SH2结构域的结合。在新的氨基酸中,Glu的丙酸侧链已被丙二酰基或羧甲基丙二酰基部分所取代,该部分位于距α-碳不同距离处,以优化Grb2-SH2结构域的磷酸酪氨酸结合腔中的相互作用。另外,已经开发了适于大规模生产的制备Fmoc保护的1 -γ-羧基谷氨酸的直接有效的合成路线,以55%的总产率提供了这种重要且独特的氨基酸1。