Synthesis of Protected l-4-[Sulfono(difluoromethyl)]phenylalanine and Its Incorporation into a Peptide
摘要:
[GRAPHICS]A protected form of L-4-[sulfono(difluoromethyl)]phenylalanine (F(2)Smp), a novel non hydrolyzable phospho- and sulfotyrosine mimetic, was synthesized via electrophilic fluorination of a benzylic sulfonate followed by a Pd-catalyzed cross coupling reaction between the fluorinated sulfonate and the zincate of protected iodoalanine, F(2)Smp was incorporated into a peptide using solid-phase peptide synthesis techniques.
酪氨酸硫酸化是肽和蛋白质的重要翻译后修饰,它支持和调节许多蛋白质-蛋白质相互作用。为了克服天然修饰的内在不稳定性,我们报告了两种磺酸盐类似物的合成及其与两种抑制凝血酶的硫肽的结合。这些磺酸盐类似物对天然磺基酪氨酸的有效模拟在它们的凝血酶抑制活性和结合模式的背景下得到验证,如通过 X 射线晶体学确定的。
Enantioselective Synthesis of Protected <scp>l</scp>-4-[Sulfonamido(difluoromethyl)]phenylalanine and <scp>l</scp>-4-[Sulfonamido(methyl)]phenylalanine and an Examination of Hexa- and Tripeptide Platforms for Evaluating pTyr Mimics for PTP1B Inhibition
作者:Bryan Hill、Vanessa Ahmed、Daniel Bates、Scott D. Taylor
DOI:10.1021/jo061496r
日期:2006.10.1
These amino acids were incorporated into two peptide sequences, DADE-X-LNH2 and FmocGlu(OBn)-X-LNH2, which have previously been employed as platforms for assessing pTyr mimics for inhibition of protein tyrosine phosphatase 1B (PTP1B). Inhibition studies with these and other peptides and PTP1B revealed that good inhibition could be obtained using the tripeptide platform, although the presence of a pTyr