在我们以前的研究中,我们已经表明,含有磷酸酯的硫脲化合物具有强大的抗肿瘤活性,可以用作开发抗肿瘤药物的新策略。本文合成了一系列新型的膦酸酯硫脲5–38,并通过1 H NMR,13 C NMR光谱,元素分析进行了全面表征。三种人类癌细胞系(Bcap-37,BGC-823和PC-3)已用于研究这些化合物的抗肿瘤活性。总结了结构-活性关系后,我们发现R,R 1和R 2的变化在这些新颖的膦酸酯硫脲中,它们具有抗肿瘤活性。所有这些在SAR指导下的努力都可能在不久的将来导致市场上出现新型抗肿瘤药物。
在我们以前的研究中,我们已经表明,含有磷酸酯的硫脲化合物具有强大的抗肿瘤活性,可以用作开发抗肿瘤药物的新策略。本文合成了一系列新型的膦酸酯硫脲5–38,并通过1 H NMR,13 C NMR光谱,元素分析进行了全面表征。三种人类癌细胞系(Bcap-37,BGC-823和PC-3)已用于研究这些化合物的抗肿瘤活性。总结了结构-活性关系后,我们发现R,R 1和R 2的变化在这些新颖的膦酸酯硫脲中,它们具有抗肿瘤活性。所有这些在SAR指导下的努力都可能在不久的将来导致市场上出现新型抗肿瘤药物。
Protecting-Group-Free Amidation of Amino Acids using Lewis Acid Catalysts
作者:Marco T. Sabatini、Valerija Karaluka、Rachel M. Lanigan、Lee T. Boulton、Matthew Badland、Tom D. Sheppard
DOI:10.1002/chem.201800372
日期:2018.5.11
Amidation of unprotected aminoacids has been investigated using a variety of ‘classical“ coupling reagents, stoichiometric or catalytic group(IV) metal salts, and boron Lewis acids. The scope of the reaction was explored through the attempted synthesis of amides derived from twenty natural, and several unnatural, aminoacids, as well as a wide selection of primary and secondary amines. The study also
Twenty pseudo-peptide thioureas IIa-1 containing alpha-aminophosphonate moiety were synthesized from the reaction of chiral alpha-amino carboxamide derivatives Ia-c with O,O '-dialkylisothiocyanato(phenyl) methylphosphonate 5. The synthesized compounds were completely characterized by elemental analysis, physical and spectral (IR, H-1 NMR, C-13 NMR) data. According to the preliminary studies on antitumor activities, compounds IIa-1 could inhibit tumor cells PD, Bcap37 and BGC823. These compounds displayed low to high activity by MTT assays. Among them, L-Ilk, D-IIa and D-IIe were identified as potent inhibitors, with IC50 values ranging from 4.7 to 11.2 mu M according to in vitro assay. (C) 2010 Elsevier Masson SAS. All rights reserved.