Chiral 1,1?-Binaphthyl Molecular Clefts for the Complexation of Excitatory Amino-Acid Derivatives
作者:Esther Martinborough、Tiziana Mordasini Denti、Peter P. Castro、Tara B. Wyman、Carolyn B. Knobler、Fran�ois Diederich
DOI:10.1002/hlca.19950780502
日期:1995.8.9
as (R)- and (S)-7 showed a preference for the larger Glu derivative, whereas type-B receptors such as (R)- and (S)-8 and (R)- and (S)-9 formed more stable complexes with the smaller Cbz-Asp. To improve the poor enantioselectivity shown by 7–9, additional functionality was introduced at the 7,7′-positions of the 1,1′-binaphthyl spacer, and the nature of the H-bonding sites in the 6,6′-positions was varied
的络合ñ -苄氧羰基(Cbz)的兴奋性氨基酸的氨基酸衍生物L-天冬氨酸(Asp; 1),L-谷氨酸(谷氨酸; 3),并且,在第一时间,L-红藻氨酸((2-小号,3 S,3 S)-2-羧基-4-(1-甲基乙烯基)吡咯烷-3-乙酸; Kai; 5)在CDCl 3中进行了研究,该混合物具有由1,1'-联萘基组成的多种手性受体具有(羧酰胺基)吡啶(CONH(py))官能团的间隔基连接到主凹槽的6,6'-位。A型受体具有两个N-(吡啶-2-基)羧酰胺H键位(例如7),而B型受体具有两个连接的N-(吡啶-6,2-二基)乙酰胺残基(例如8和9)。兴奋性氨基酸衍生物与其他非手性α,β-二羧酸与这些受体的配合物主要通过两组CO··HN和OH··N H键稳定。旋光性A型受体(如(R)-和(S)-7显示出对较大的Glu衍生物的偏好,而B型受体(如(R)-和(S)-8和(R)-和(小号) - 9与较小的Cbz-A