由(S)-1,2-丙二醇和(S)-3-芳氧基制备了两个新的C 2对称光学活性吡啶-15-冠-5型配体,它们在立体中心具有亲脂性链,大环5和6。-1,2-丙二醇用于氨基酸酯衍生物的对映体识别。这些新的大环化合物已被证明是用于初级有机铵盐强络合剂(具有ķ最多的值,以1363.5中号-1,Δ ģ Ò向上的至17.86千焦摩尔-1和80:20的选择性比率)由11 H NMR滴定法。这些大环主体在含有0.25%CD 3 OD的CDCl 3中显示出对苯丙氨酸甲酯盐酸盐的I-对映异构体的对映选择性结合,其中K L / K D高达8.57 。实验结果已在原子级进行了分子动力学计算,涉及手性pyridino-15-crown-5的分子识别和区分特性。结合自由能经计算为〜-25kJ mol -1。结果表明宿主比苯丙氨酸盐更好地结合和区分缬氨酸盐。分子动力学,MM / PBSA计算与1 H NMR结果一致。
A series of β-amino alcohols derivatives were synthesized from (R)-2-amino-1-butanol and (S)-1,2-propanediol, and they have been used as organocatalaysts in the racemic ring opening of epoxide in good yields with high enantiomeric excess (up to 97%).
Synthesis of novel C2-symmetric chiral crown ethers and investigation of their enantiomeric recognition properties
作者:Yilmaz Turgut、Tarik Aral、Halil Hosgoren
DOI:10.1016/j.tetasy.2009.09.010
日期:2009.10
A series of new C2-symmetric chiralazacrownether macrocycles 1–4 have been synthesized from (S)-3-aryloxy-1,2-propanediol and (S)-1,2-propanediol for the enantiomeric recognition of amino acid ester derivatives. These new macrocycles have been shown to be strong complexing agents for primary organic ammonium salts (with K up to 176.93 M−1 and ΔG° up to 12.81 kJ mol−1) by 1H NMR titration. These
一系列新的c ^ 2 -对称的手性氮杂冠醚大环化合物1 - 4已经从(合成小号)-3-芳氧基-1,2-丙二醇和(小号)-1,2-丙二醇为对映异构体识别氨基酸的酯衍生物。通过1 H NMR滴定显示,这些新的大环化合物是伯有机铵盐(K最高为176.93 M -1和ΔG °最高为12.81 kJ mol -1)的强络合剂。这些大环主体对苯丙氨酸甲酯盐酸盐的D-对映异构体具有K D /的对映选择性键。在具有0.25%CD 3 OD的CDCl 3中,K L高达6.87 。
Pyridine-containing chiral macrocycles for the enantioselective recognition of amino acid derivatives and their molecular dynamics simulations
作者:Yilmaz Turgut、Safak Ozhan Kocakaya
DOI:10.1016/j.tetasy.2010.05.038
日期:2010.4
enantiomeric recognition of amino acid ester derivatives. These novel macrocycles have been shown to be strong complexing agents for primary organic ammonium salts (with K values of up to 1363.5 M−1, ΔGo of up to 17.86 kJ mol−1 and a selectivity ratio of 80:20) by 1H NMR titration method. These macrocyclic host exhibited enantioselective binding towards the l-enantiomer of phenylalanine methyl ester hydrochloride
由(S)-1,2-丙二醇和(S)-3-芳氧基制备了两个新的C 2对称光学活性吡啶-15-冠-5型配体,它们在立体中心具有亲脂性链,大环5和6。-1,2-丙二醇用于氨基酸酯衍生物的对映体识别。这些新的大环化合物已被证明是用于初级有机铵盐强络合剂(具有ķ最多的值,以1363.5中号-1,Δ ģ Ò向上的至17.86千焦摩尔-1和80:20的选择性比率)由11 H NMR滴定法。这些大环主体在含有0.25%CD 3 OD的CDCl 3中显示出对苯丙氨酸甲酯盐酸盐的I-对映异构体的对映选择性结合,其中K L / K D高达8.57 。实验结果已在原子级进行了分子动力学计算,涉及手性pyridino-15-crown-5的分子识别和区分特性。结合自由能经计算为〜-25kJ mol -1。结果表明宿主比苯丙氨酸盐更好地结合和区分缬氨酸盐。分子动力学,MM / PBSA计算与1 H NMR结果一致。