背景:十肽是在同一含氨基酸的小分子或链中同时具有肽键和酯键的分子。许多二肽显示出非常有前途的生物学活性,包括抗癌,抗菌,抗癌,抗病毒,抗真菌,抗炎,抗凝血或抗致动脉粥样硬化特性。 本文的目的是将离子液体用作绿色介质,通过四组分反应合成新的α-噻唑并二肽肽衍生物。 方法:通过硫脲羧酸衍生物,苯甲酰溴,酮和异氰酸酯的四组分缩合/ Passerini串联反应,在1-甲基-3-戊基咪唑鎓溴化物中作为新溶剂,可轻松一步一步制得含噻唑的二肽。 结果:如方案1所示,在50℃的离子液体中,硫脲羧酸1,苯甲酰溴或其衍生物2,烷基异氰化物3和酮4的反应以良好的产率产生了二肽衍生物5。产物通过1 H NMR,13 C NMR,质谱和IR光谱表征。该反应基于环化反应和Passerini反应的结合而进行。 结论:总而言之,硫脲羧酸,苯甲酰溴或其衍生物,烷基异氰化物和酮在离子液体中在50°C下的反应可产生高产率的二肽
Synthesis and Characterization of N-benzoyl-N′-carboxyalkyl Substituted Thiourea Derivatives
作者:Zhonghua Li、Yan Zhang、Yangang Wang
DOI:10.1080/10426500307952
日期:2003.2.1
N-Benzoyl-N'-carboxyl substituted thiourea derivatives (I-X) have been synthesized by the reaction of benzoyl isothiocyanate with amino acids. Their structures are confirmed by IR, (HNMR)-H-1, and elemental analysis. The reaction conditions are experimentally investigated, and the preliminary biological tests show that some of the compounds have excellent plant growth promotion activities.
Synthesis of 1-benzoyl-3-alkylthioureas by transamidation under microwave in dry media
作者:Heiddy Márquez、Eduardo R Pérez、Ana M Plutı́n、Margarita Morales、André Loupy
DOI:10.1016/s0040-4039(00)00047-2
日期:2000.3
1-Benzoyl-3,3-diethylthiourea was transamidated with several amines to the corresponding 1-benzoyl-3-alkylthioureas in open vessels under microwave irradiation using a domestic oven. The syntheses were performed in solvent-free conditions on potassium fluoride impregnated alumina. Yields were dramatically improved in comparison with classical heating under the same conditions. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.