Dual‐protected amino acid derivatives as new antitubercular agents
作者:Pedro P. Castro、Débora L. Campos、Fernando R. Pavan、Giovanni W. Amarante
DOI:10.1111/cbdd.13315
日期:2018.8
drug-resistant rates. In an attempt to develop new antitubercular agents, 35 compounds were synthesized, most of them bearing a carbamate and enantiopure aminoacid moiety. These compounds had their activity evaluated toward a Mycobacterium tuberculosis strain (ATCC 27294) and cytotoxicity against fibroblast MRC-5 cells (ATCC CCL-171). Three of the prepared derivatives presented a good antimicrobial inhibition
Cytotoxic Activity of Synthetic Chiral Amino Acid Derivatives
作者:Pedro de Castro、Raoni Siqueira、Luiza Conforte、Chris Franco、Gustavo Bressan、Giovanni Amarante
DOI:10.21577/0103-5053.20190157
日期:——
series of dual-protected aminoacidderivatives was synthesized and evaluated as potential novel anticancer agents. The 40 derivatives were prepared in up to three reaction steps. The cytotoxic activities were screened in vitro against a panel of tumor and nontumor cells using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Among the synthesized derivatives, three of them showed
Study on Anti-Proliferative Activity in Cancer Cells and Preliminary Structure-Activity Relationship of Pseudo-Peptide Chiral Thioureas
作者:Peng Liao、Shi-Qin Hu、Hong Zhang、Liang-Bi Xu、Jing-Zi Liu、Bin He、Shang-Gao Liao、Yong-Jun Li
DOI:10.1002/bkcs.11383
日期:2018.3
In our previous studies, we have shown that thiourea compounds containing phosphate esters have potent antitumor activity and can be used as a novel strategy for the development of antitumor agents. Herein, a series of novel phosphonate thioureas 5–38 have been synthesized, which were fully characterized by 1HNMR, 13CNMR spectrum, elemental analysis. Three human cancer cell lines (Bcap‐37, BGC‐823
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。
Direct amidation of non‐activated carboxylic acid and amine derivatives catalyzed by TiCp
<sub>2</sub>
Cl
<sub>2</sub>
carboxylic acid and aminederivatives catalyzed by TiCp2Cl2. Arylacetic acid derivatives reacted with different amines to afford the corresponding amides in good to excellent yield except of aniline. Aryl formic acids failed to react with aniline but smoothly reacted with aliphatic amines and benzylamine in moderate to good yield, fatty acids reacting with benzyl and aliphatic amines give amides in good
Hafnium-Catalyzed Direct Amide Formation at Room Temperature
作者:Helena Lundberg、Hans Adolfsson
DOI:10.1021/acscatal.5b00385
日期:2015.6.5
[Hf(Cp)2Cl2], as catalyst. Amino acids are transformed into their corresponding amides without racemization, and the catalyst displays full selectivity for the amidation of carboxylic acids overesters. Electronic properties of the carboxylic acids were found to have a strong influence on the rate of the amidation reaction, and the need for a balanced amount of molecularsieves was observed to be