Creation of super-efficient chiral selector and practical use of chemically bonded type chiral column

我们制备了以苯甲醚型伪18-冠-6醚为选择剂的手性固定相1，发现手性氨基化合物具有较高的分离能力。该光热系统已成功投入实际应用。为了研究冠腔中手性部分和官能团的结构对对映选择性的影响，合成了以酚醛类18-冠-6醚为选择剂的手性柱（2,3）。研究了1-苯基-1,2-环己二醇（4,5）、3,5-二甲基苯基衍生物(6)、4-三氟甲基苯基衍生物(7)和1-萘基衍生物(8)等选择剂的对映选择性。将相应的手性选择器（9、10、11、12）衍生为csp(1、13、14、15)，并制备手性色谱柱。此外，还设计并合成了仲胺的手性选择剂。采用手性冠醚11作为手性筛选剂，对镧系化合物进行筛选。测试了具有相对较大的手性1-苯基-1,2-环己二醇单元的化学键合型CSP 13的色谱性能。在正相色谱条件下，CSP 13对氨基酸、氨基醇和疏水氨基化合物的对映体具有较短的保留时间和较好的分辨率。相对大块的氨基化合物在CSP 1上的分离效果较好，而较小的氨基化合物在CSP 13上的分离效果较好。总的来说，与CSP 1相比，CSP 13上的许多氨基化合物在对映体分离方面取得了相当大的进步。CSP 13并不总是优于CSP 1。这两种csp在手性识别方面是互补的。由于化学键合的性质，CSP 13和CSP 1在流动相、添加剂和分析物上几乎没有限制，因此两相在对映体分离中具有广泛的适用性。

We have prepared chiral stationary phases 1 having anisole type pseudo-18-crown-6 ether as selector, and found high separation ability of chiral amino compound. This CSP was succeeded to put to practical use. In order to investigate the effect of structure of chiral moiety and functional group placed in the crown cavity on enantioselectivity, chiral column (2,3) having phenolic psoudo-18-crown-6 ethers as selectors were synthesized. The enantioselectivity of the selectors having 1-phenyl-1,2-cydohexanediol (4,5),3,5-dimethylphenyl derivative (6),4-tryfluoromethylphenyl derivative (7), and 1-naphtyl derivative (8) were investigated. Corresponding chiral selectors (9,10,11,12) were derived to CSPs (1,13,14,15) and chiral column for chromatography were prepared. In addition, chiral selectors for secondary amines were designed and synthesized. Chiral crown ether 11 was applied for chiral sift reagent with lanthanide compound.Chromatographic performance of chemically bonded type CSP 13 having a relatively bulky chiral 1-phenyl-1,2-cydohexanediol unit was tested. Using normal phase chromatographic conditions, CSP 13 exhibited short retention times and good resolution of the enantiomers of various amino compounds including amino acids, amino alcohols, and hydrophobic amino compounds. The separation of relatively bulky amino compounds was better on CSP 1, whereas small amino compounds were separated better on CSP 13 Overall, considerable improvements in the enantiomer separation was achieved for many amino compounds on CSP 13 compared to CSP 1. CSP 13 is not always superior to CSP 1. The two CSPs are complementary with each other in terms of chiral recognition. CSP 13 and CSP 1 have little restriction in mobile phases, additives, and analytes because of chemically bonded nature, so that both phases have wide applicability for enantiomer separation.