Intra- and intermolecular hetero-Diels-Alder reactions. 17. Intramolecular hetero-Diels-Alder reaction of alkylidene- and benzylidenepyrazolones and benzylideneisoxazolones. Investigations toward the conformation of the transition state
Protic ionic liquids (PILs) nanostructure and physicochemical properties: development of high-throughput methodology for PIL creation and property screens
作者:Tamar L. Greaves、Krystal Ha、Benjamin W. Muir、Shaun C. Howard、Asoka Weerawardena、Nigel Kirby、Calum J. Drummond
DOI:10.1039/c4cp04241g
日期:——
A high-throughput approach was developed in order to prepare and dry a series of protic ionic liquids (PILs) from 48 Brønsted acid–base combinations.
Understanding the Role of Protic Ionic Liquids (PILs) in Reactive Systems: Rational Selection of PILs for the Design of Green Synthesis Strategies for Allylic Amines and β‐Amino Esters
作者:María V. Bravo、José L. Fernández、Claudia G. Adam、Claudia D. Della Rosa
DOI:10.1002/cplu.201900318
日期:2019.7
acid and amine. In reactive systems, these free species determine the products of the reaction. In particular, allylic amines and β-amino esters were obtained in good yields (91 and 75 %, respectively) by reaction of conjugateddienes and acrylates in the presence of PILs. By taking into account the actual composition of each PIL, it was possible to direct the reaction path towards a specific product
Cytotoxicity of protic ionic liquids towards the HaCat cell line derived from human skin
作者:Radhika Arunkumar、Amanda N. Abraham、Ravi Shukla、Calum J. Drummond、Tamar L. Greaves
DOI:10.1016/j.molliq.2020.113602
日期:2020.9
toxicity was quantified by the EC50 values of each of these PILs towards HaCat cells, which are derived from human skin cells. Additional salts and solvents were used for comparison including DMSO, choline chloride, potassium nitrate, sodium acetate and ethanol to distinguish if the toxicity changes were due to ionicity, short chain amphiphilic behaviour, or specific ion effects. The toxicity followed
Synthesis and Evaluation of 4-Hydroxycoumarin Imines as Inhibitors of Class II Myosins
作者:Jhonnathan Brawley、Emily Etter、Dante Heredia、Amarawan Intasiri、Kyle Nennecker、Joshua Smith、Brandon M. Welcome、Richard K. Brizendine、Thomas W. Gould、Thomas W. Bell、Christine Cremo
DOI:10.1021/acs.jmedchem.0c01062
日期:2020.10.8
Inhibitors of muscle myosin ATPases are needed to treat conditions that could be improved by promoting muscle relaxation. The lead compound for this study ((3-(N-butylethanimidoyl)ethyl)-4-hydroxy-2H-chromen-2-one; BHC) was previously discovered to inhibit skeletal myosinII. BHC and 34 analogues were synthesized to explore structure–activity relationships. The properties of analogues, including solubility
需要肌肉肌球蛋白 ATP 酶抑制剂来治疗可以通过促进肌肉放松来改善的病症。本研究的先导化合物((3-(N-丁基乙酰亚胺酰基)乙基)-4-羟基-2 H - chromen -2-one;BHC)先前被发现可抑制骨骼肌球蛋白II。合成了 BHC 和 34 种类似物以探索结构-活性关系。类似物的特性,包括溶解性、稳定性和毒性,表明 BHC 支架可用于开发治疗方法。快骨骼肌和心肌肌球蛋白II,抑制骨骼肌收缩力的肌动蛋白活化的ATP酶活性的抑制离体,和减慢在体外测量了肌动蛋白滑动速度。与 BHC 相比,具有芳香侧臂的几种类似物对骨骼肌球蛋白与心脏肌球蛋白的效力(半数最大抑制浓度 (IC 50 ) <1 μM)和选择性(≥12 倍)均有所提高。几种类似物阻断了神经传递,表明它们对非肌肉肌球蛋白 II 的选择性高于骨骼肌球蛋白。竞争和分子对接研究表明 BHC 和 blebbistatin 结合到肌球蛋白的同一位点。
Synthesis of high-density aviation fuels with methyl benzaldehyde and cyclohexanone
high-density jet fuel range tricyclic alkanes with methyl benzaldehydes and cyclohexanone which can be derived from lignocellulose. In the first step, C14 oxygenates (i.e. 2-(2-methylbenzylidene)cyclohexanone or 2-(4-methylbenzylidene)cyclohexanone) were obtained by the solvent-free aldol condensation of 2-methyl benzaldehyde (or 4-methyl benzaldehyde) and cyclohexanone. Among the investigated catalysts
开发了一种新的两步法,用于合成可以由木质纤维素衍生的甲基苯甲醛和环己酮的高密度喷气燃料系列三环烷烃。在第一步中,通过无溶剂的2-甲基苯甲醛(或4-甲基苯甲醛)和(甲基)苯甲醛缩合得到C 14含氧化合物(即2-(2-甲基苄叉基)环己酮或2-(4-甲基苄叉基)环己酮)。环己酮。在所研究的催化剂中,EAOAc离子液体(用乙醇胺和乙酸制备的可再生催化剂)显示出最高的活性和良好的稳定性。其上的C 14的高碳收率(〜85%)在温和的反应条件下(353 K,6 h)获得含氧化合物。在第二步骤中,通过在商业Pd / C催化剂上进行水相加氢脱氧(APHDO),将C 14含氧化合物选择性地转化为1-甲基十二碳氢-1 H-芴和3-甲基十二碳氢-1 H-芴。根据我们的测量,所获得的1-甲基十二烷基-1 H-芴和3-甲基十二烷基-1 H-芴具有高密度(在298 K下分别为0.99 g mL -1和0.96 g mL