作者:Tomoyo Kamei、Tamiko Takahashi、Hiroyuki Teramae、Jyunichi Koyanagi
DOI:10.1248/cpb.c20-00307
日期:2020.8.1
1-Fluoroindan-1-carboxyic acid (FICA) derivatives containing a monosubstituted benzene ring (1b–e) were synthesized as their methyl esters and their potential as chiral derivatizing agents (CDAs) were assessed by both 19F- and 1H-NMR spectroscopy. Introduction of a substituent at the 4-position in the benzene ring caused a 1.2–2 fold increase in ΔδF values when compared with that of FICA. This increase
合成了含有一个单取代苯环(1b – e)的1-氟丹丹-1-羧酸(FICA)衍生物作为它们的甲酯,并通过19 F-和1 H-NMR评估了它们作为手性衍生剂(CDA)的潜力光谱学。在苯环的4位上的取代基的引入导致了一个Δδ1.2-2倍增加˚F当与FICA的比较的值。使用19 F-NMR的相关性模型和(R的上平面(sp)和反上平面(ap)构象异构体的稳定性顺序研究了这种增加,S)和(S,S)非对映体的吉布斯自由能在298.15 K。 图形抽象全图