研究了N-羧甲基(Cm-)氨基酸合成肽的基本问题。通过用于母体氨基酸的常规方法获得了几种游离Cm-氨基酸的N-保护衍生物及其单酯的N-苄氧羰基(Z)衍生物。在 Cm 氨基酸的任一羧基上形成肽键被证明可以通过常用方法实现,例如碳二亚胺、二环己基碳二亚胺-1-羟基苯并三唑或混合酸酐方法,如使用 Z-Cm 的示例所示-氨基酸衍生物作为羧基组分。另一方面,使用Cm-氨基酸二酯作为氨基组分的肽不能通过上述常用方法制备。最终通过酰氯法得到所需化合物。
In view of developing alternatives to classical peptidesynthesis strategies that suffer from low efficacy and negative environmental impact, the reactivity of N-protected α-amino acids, amino esters, and N-ethyl-N′-(3-dimethylaminopropyl)carbodiimide was studied under liquid-assisted grinding (LAG) conditions. The optimal reaction conditions enabled the intensive and environmentally benign mechanosynthesis
N-Hydroxy-5-norbornene-2, 3-dicarboximide (HONB) was found to be an excellent reagent to be used in couple with N, N'-dicyclohexylcarbodiimide (DCC) for the peptide synthesis. Various racemization tests by the use of this reagent were conducted to see the degree of racemization during the peptide synthesis. The newly employed reagent (HONB) decreases racemization, prohibits formation of N-acylurea and affords peptides in excellent yields and a high state of purity. To evaluate this new reagent, luteinizing hormone releasing hormone (LH-RH) was prepared by the new active ester method.
Simple modular di- and tripeptides with a primary amine at the N-terminus catalyze the aqueous asymmetric aldol reaction between unmodified ketones and aldehydes to furnish the corresponding β-hydroxy ketones with up to 86% ee in water and 99% ee in aqueos media.
N 末端带有伯胺的简单模块化二肽和三肽可催化未修饰的酮和醛之间的水性不对称羟醛反应,为相应的 β-羟基酮提供在水中高达 86% ee 和在水介质中高达 99% ee 的 β-羟基酮。
Schroeder,E.; Luebke,K., Justus Liebigs Annalen der Chemie, 1962, vol. 655, p. 211 - 218
作者:Schroeder,E.、Luebke,K.
DOI:——
日期:——
Katti, S. B.; Misra, P. K.; Haq, W., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 3 - 4
作者:Katti, S. B.、Misra, P. K.、Haq, W.、Mathur, K. B.