研究了对磺化杯[ n ]芳烃(SC n A)和两种色氨酸N -[(叔丁氧基)羰基]-色氨酸(trp-A)和N-苯甲氧基-色氨酸(trp-B)的复杂特性通过各种技术。在不同温度下进行荧光分光光度法以确定稳定性常数并评估两种配合物的热力学参数。估计了 pH 值对复合物形成的影响。根据荧光数据,提出了trp-A的叔丁基和trp-B的苯基存在空间位阻的假设。1还进行了 H NMR 以确定结合相互作用机制。结果表明,两种色氨酸的吲哚苯环部分渗透到对磺化杯[ n ]芳烃的空腔中。随着杯芳烃环酚单元数量的增加,Ha、Hb 和 Hc、Hd 位置的变化变得更加显着。配合物的分子模型阐明了关于trp-A的叔丁基和 trp-B 的苯基的空间位阻的假设。这些分子建模计算的观察结果与先前的荧光数据和1 H NMR 结果一致。
Procédé de préparation d'un amide d'alpha-aminoacide, utilisable en synthèse peptidique
申请人:SOLVAY (Société Anonyme)
公开号:EP0633267A1
公开(公告)日:1995-01-11
Un amide d'α-aminoacide est préparé par réaction d'un Nα-aryloxycarbonyl-aminoacide avec un composé comportant un groupement amino libre. Ce procédé permet de préparer facilement des peptides, par réaction directe entre le groupement carboxyle du dérivé Nα-aryloxycarbonyle d'un aminoacide et le groupement amino libre d'un deuxième aminoacide ou d'un fragment peptidique, sans nécessiter de protection de la fonction carboxyle du deuxième aminoacide ou du fragment peptidique, ni d'agent de couplage ni d'étape de déprotection.
METHOD OF RESOLVING OPTICAL ISOMERS OF AMINO ACID DERIVATIVE
申请人:TOKUYAMA CORPORATION
公开号:EP1338588A1
公开(公告)日:2003-08-27
Provided is a separating method for an optical isomer mixture comprising the steps of mixing an amino acid derivative such as N-(tert-butoxycarbonyl)-DL-alanine in which optical isomers of a D type and an L type are present in a mixture with a hydrophilic compound such as β-cyclodextrin having a different affinity to two kinds of the optical isomers described above and then bringing the resulting aqueous solution or aqueous suspension into contact with a hydrophobic substance such as a solid matter subjected on a surface thereof to hydrophobic treatment on the condition that the pH is 3.5 or lower or under the coexistence of ions including an atomic group having hydrophobicity which can be a counter ion for the amino acid derivative described above such as a triethylammonium ion to thereby separate the D type amino acid derivative from the L type amino acid derivative present in the above aqueous solution or aqueous suspension.
本发明提供了一种光学异构体混合物的分离方法,该方法包括以下步骤:将氨基酸衍生物(如 N-(叔丁氧羰基)-DL-丙氨酸)与亲水性化合物(如对上述两种光学异构体具有不同亲和力的 β-环糊精)混合,在混合物中存在 D 型和 L 型光学异构体。对上述两种光学异构体具有不同亲和力的环糊精的混合物,然后将所得水溶液或水悬浮液与疏水性物质接触,如在其表面进行疏水处理的固体物质,条件是 pH 值为 3.5或更低的pH值,或在包括具有疏水性的原子团的离子共存的条件下,该原子团可以是上述氨基酸衍生物的反离子,例如三乙基铵离子,从而将上述水溶液或水悬浮液中的D型氨基酸衍生物与L型氨基酸衍生物分离。
Bauguess; Berg, Journal of Biological Chemistry, 1936, vol. 114, p. 253,254
作者:Bauguess、Berg
DOI:——
日期:——
Procédé de préparation d'amides d'alpha-aminoacide, utilisables en synthèse peptidique
申请人:SOLVAY (Société Anonyme)
公开号:EP0633267B1
公开(公告)日:2001-09-26
Method of resolving optical isomers of amino acid derivative
申请人:——
公开号:US20040102646A1
公开(公告)日:2004-05-27
Provided is a separating method for an optical isomer mixture comprising the steps of mixing an amino acid derivative such as N-(tert-butoxycarbonyl)-DL-alanine in which optical isomers of a D type and an L type are present in a mixture with a hydrophilic compound such as &bgr;-cyclodextrin having a different affinity to two kinds of the optical isomers described above and then bringing the resulting aqueous solution or aqueous suspension into contact with a hydrophobic substance such as a solid matter subjected on a surface thereof to hydrophobic treatment on the condition that the pH is 3.5 or lower or under the coexistence of ions including an atomic group having hydrophobicity which can be a counter ion for the amino acid derivative described above such as a triethylammonium ion to thereby separate the D type amino acid derivative from the L type amino acid derivative present in the above aqueous solution or aqueous suspension.