Investigating Sequence Space: How Important is the Spatial Arrangement of Functional Groups in the Asymmetric Aldol Reaction Catalyst H-Pro-Pro-Asp-NH2?
作者:Jefferson D. Revell、Helma Wennemers
DOI:10.1002/adsc.200800053
日期:2008.5.5
H-Pro-Pro-Asp-NH21 is a versatile catalyst for asymmetric aldol reactions. Within the catalyst structure, both the N-terminal secondary amine and the carboxylic acid are crucial for efficient catalysis. Here, the importance of the arrangement of these two functional groups towards each other was examined. Several analogues of H-Pro-Pro-Asp-NH2 were prepared in which the secondary amine and the carboxylic
H-Pro-Pro-Asp-NH 2 1是用于不对称羟醛反应的通用催化剂。在催化剂结构内,N-末端仲胺和羧酸对于有效催化都是至关重要的。在此,研究了这两个功能组相对彼此的布置的重要性。H-Pro-Pro-Asp-NH 2的几种类似物制备了其中仲胺和羧酸占据不同位置的化合物。对它们的催化性能的评估表明,这两个官能团的位置对于有效催化至关重要。即使是看似很小的结构修饰,例如一个或多个亚甲基,也可以显着地修饰催化性能。结果证明了合理设计肽催化剂的困难以及组合智能筛选方法对催化剂发现的价值。缩写: Fmoc = 9-芴基甲氧基羰基; m = 1。HCTU = 2-(6-氯-1H-苯并三唑-1-基)-1,1,3,3-四甲基尿nium六氟磷酸盐; MSNT = 1-(均三甲苯-2-磺酰基)-3-硝基-1 H-1,2,4-三唑; TNBS = 2,4,6-三硝基苯磺酸。