On-Bead Combinatorial Approach to the Design of Chiral Stationary Phases for HPLC
作者:Peter Murer、Kevin Lewandowski、Frantisek Svec、Jean M. J. Fréchet
DOI:10.1021/ac981143v
日期:1999.4.1
A library of 36 l-amino acid anilides, which are potential selectors for chiral HPLC, was synthesized in solution and attached to functionalized macroporous polymer beads. The best selector from the library was identified by a deconvolution process using the HPLC separation of several racemic N-(3,5-dinitrobenzoyl)-α-amino acid alkylamides as a probe. In each deconvolution step, a series of chiral stationary phases (CSPs) containing a subset of the amino acid anilide selector library was screened for enantioselectivity. After the best CSP was chosen, the library was further deconvoluted until the single best selector was found. The highest selectivity was obtained with a l-proline-1-indananilide that exhibited α values up to 23 under normal-phase HPLC conditions. In addition, six CSPs were prepared using individual selectors from the library, and screening results indicate that the deconvolution process indeed led to the most selective receptor.
合成了一库36种l-氨基酸酰胺,这些酰胺是潜在的手性高效液相色谱(HPLC)选择剂,溶液中合成后连接到功能化的大孔聚合物珠子上。通过对多个外消旋N-(3,5-二硝基苯甲酰)-α-氨基酸烷基酰胺的HPLC分离结果进行解卷积过程,确定了库中最佳的选择剂。在每个解卷积步骤中,筛选了一系列包含氨基酸酰胺选择剂库子集的手性固定相(CSP),以评估其对映选择性。在选择出最佳CSP之后,库被进一步解卷积,直到找到单一的最佳选择剂。通过常相HPLC条件,l-脯氨酸-1-吲哚酰胺的选择性最高,达到α值高达23。此外,使用库中的各个选择剂制备了六个CSP,筛选结果表明,解卷积过程确实导致了最具选择性的受体。