Electrophilic ring opening of oxazolines derived from serine and threonine: A practical entry to N(N)-protected β-halogeno α-aminoesters
作者:Abdelhamid Laaziri、Jacques Uziel、Sylvain Jugé
DOI:10.1016/s0957-4166(98)00002-0
日期:1998.2
Treatment of oxazolines 4a–c derived fromserine or threonine with chloroformates, leads to the oxazoline ring opening and to the formation of N,N-protected β-chloro-α-aminoesters 1a–e in 30–88% isolated yields. In the presence of NaI (0.9 equiv), oxazolines 4a,b,d react with ethyl chloroformate to afford the N,N-protected β-iodo α-amino esters 1f–h (67–89% yields), whereas the reaction of 4a,b with
Design, Synthesis, and Biological Evaluation of Ring-Opened Bengamide Analogues
作者:Wan-Yi Tai、Run-Tao Zhang、Yi-Ming Ma、Min Gu、Gang Liu、Jia Li、Fa-Jun Nan
DOI:10.1002/cmdc.201100164
日期:2011.9.5
Opening up to new possibilities! Ring‐opening of the caprolactam in bengamides, marine natural products isolated fromJaspidaesponges, gives rise to analogues with simplified structures, improved aqueous solubility and potent cytotoxicity against human breast cancer cells, overcoming some of the factors hindering their development as antitumor agents.
Synthesis, Characterization, and Antibacterial Activity of New Linezolid-Based Phosphoramidate Derivatives
作者:P. Krishna、D. Srinivasulu、Venkata S Kotakadi
DOI:10.1080/10426507.2014.902835
日期:2014.10.3
series of new linezolid-based phosphoramidate derivatives 5(a-j) were synthesized in high yields from a linezolid intermediate, [3-(3-fluoro-4-morpholinophenyl)-5-(hydroxymethyl) oxazolidin-2-one] to develop new antibacterial agents. The structures of the newly synthesized compounds were elucidated by mass, 1H, 13C & 31P NMR, IR and Elemental analysis spectralcharacterization data. All the synthesized
reported compounds are potent hA3 adenosine receptor antagonists and some of them exhibited high selectivity against the other adenosine receptors. The main structural terms of ligand recognition and selectivity were disclosed by molecular modelling studies. Molecular docking results led to the characterization of an alternative binding mode for antagonists at the orthosteric binding site of the hA3 adenosine
A 3腺苷受体被发现在不同的病理状态中起作用,例如青光眼、肾纤维化、神经性疼痛和癌症。因此,重要的是利用任何有助于研究这些条件的分子工具。在本研究中,我们继续寻找有效的 A 3腺苷受体配体,这些配体可以连续与其他分子偶联,目的是获得更有效的(例如变构配体偶联)或可检测的配体(例如荧光分子或生物素偶联)。具体而言,在吡唑并[4,3 - e ]-1,2,4-三唑并[1,5- c ]的5位引入了不同的氨基酯部分。]嘧啶核。酯官能化代表后续缀合的候选。所有报道的化合物都是有效的 hA 3腺苷受体拮抗剂,其中一些对其他腺苷受体表现出高选择性。分子模型研究揭示了配体识别和选择性的主要结构术语。分子对接结果导致在 hA 3腺苷受体的正构结合位点处对拮抗剂的替代结合模式进行表征,通过经典分子动力学模拟进行评估和评估。
<i>In silico</i>, <i>in ovo</i> and <i>in vitro</i> antiviral efficacy of phosphorylated derivatives of abacavir: an experimental approach
Abstract Outstanding increase of oral absorption, bioavailability, and antiviral efficacy of phosphorylated nucleosides and basic antiviral influence of abacavir is the central idea for the development of new series of phosphorylated abacavir (ABC) derivatives. The designed compounds were primarily screened for antiviral nature against HN protein of NDV and VP7 protein of BTV using the molecular environment