Synthesis of macrocyclic analogues of the neuroprotective agent glycyl-l-prolyl-l-glutamic acid (GPE)
作者:Paul W. R. Harris、Margaret A. Brimble
DOI:10.1039/b605293b
日期:——
The syntheses of seven macrocyclic analogues of the neuroprotective tripeptide glycyl-L-prolyl-L-glutamic acid (GPE) 1 are described. Macrocycles 6 and 7 mimic the cis conformer of GPE whereas macrocycles 2–5, 8, and 9 mimic the trans conformer of GPE. The macrocyclic peptides of well-defined geometry were prepared via Grubbs ring closing metathesis of an appropriate diene precursor. In turn each of the diene precursors were prepared from the readily available allyl-substituted amino acid building blocks 12, 13, 14, 27, 36 and 51.
描述了七种神经保护三肽甘氨酸-L-脯氨酸-L-谷氨酸(GPE)1的宏环类似物。宏环6和7模仿GPE的顺式构象,而宏环2-5、8和9则模仿GPE的反式构象。具有明确几何形状的宏环肽是通过Grubbs环闭合反应从适当的二烯前体合成的。反过来,每个二烯前体是由易得的烯丙基取代氨基酸构建单元12、13、14、27、36和51合成的。