芳族醛与酮的交联醇醛缩合反应,如:丙酮和环己酮可有效地形成交叉共轭的α,β-不饱和酮,且产率极高。丙酮和环己酮衍生的α,β-不饱和酮与(硫代)巴比妥酸的分子内和分子内迈克尔加成反应导致合成新型的7,11-二芳基-2,4-二氮杂螺[5.5]十一烷-1, 3,5,9-丁酮和2,4-二芳基-1'H-螺[双环[3.3.1]壬烷-3,5'-嘧啶] -2',4',6',9(3'H )-四酮,分别具有良好的收率。通过1 H NMR,13 C NMR,FT-IR,UV-Visible,质谱和X射线晶体学技术进行结构阐明。讨论了一种可能的形成机理。结构构象还由邻近质子和双子质子之间的二面角衍生的耦合常数证明。来自巴比妥酸的螺环化合物的NH质子的1 H NMR光谱显示宽的单峰,而源自硫代巴比妥酸的螺环化合物中的这些质子显示两个不同的峰。关键词:交叉羟醛缩合,迈克尔加成,[1 + 5]环加成,巴比妥酸,构象,螺环巴比妥酸盐。化学
Synthesis of 1-substituted 5-aryl-3-styryl-2-pyrazolines and 3-aryl-5-styryl-2-pyrazolines by the reaction of dibenzylideneacetones and<i>E,E</i>-cinnamylideneacetophenones with hydrazines
作者:Albert Lévai、József Jekó
DOI:10.1002/jhet.5570430524
日期:2006.9
The reaction of dibenzylideneacetones or E,E-cinnamylidene- acetophenones and hydrazine hydrate provided 1-propionyl derivatives of 5-aryl-3-styryl-2-pyrazolines and 3-aryl-5-styryl-2-pyrazolines. These unsaturated ketones afforded 1-(2-carboxyphenyl) or 1-(4-carboxyphenyl) 5-aryl-3-styryl-2-pyrazolines and 1-(4-carboxyphenyl) derivatives of 3-aryl-5-styryl-2-pyrazolines on treatment with (2-carboxyphenyl)-hydrazine
Synthesis and synergistic antifungal effects of monoketone derivatives of curcumin against fluconazole-resistant Candida spp.
作者:Fei Zhao、Huai-Huai Dong、Yuan-Hua Wang、Tian-Yi Wang、Ze-Hao Yan、Fang Yan、Da-Zhi Zhang、Ying-Ying Cao、Yong-Sheng Jin
DOI:10.1039/c6md00649c
日期:——
monoketone derivatives of curcumin were synthesized to investigate the synergy with fluconazole against fluconazole-resistant Candida spp. The minimal inhibitory concentration (MIC80) and the fractional inhibitory concentration index (FICI) of the antifungal synergist fluconazole were measured against fluconazole-resistant C. albicans, C. tropicalis and C. krusei in vitro. Most of these compounds showed
These compounds were evaluated for α-glucosidase inhibitory and glucose consumption-promoting activity in vitro. Compound 4l competitively and reversibly inhibited α-glucosidase (IC50 = 3.64 μM) with activity 14–fold higher than that of acarbose. Docking analysis substantiated these findings. In addition, compound 4l exhibited significant glucose consumption promoting activity at 1 μM.
Ungesättigte Oxime, 18. Mitt. Dichlorphenyl-alkenone und ihre Oxime
作者:Bernard Unterhalt
DOI:10.1002/ardp.19783110313
日期:——
Einige Dichlorbenzaldehyde werden mit Aceton oder Butanon zu den Ketonen 1, 3 und 4 kondensiert. Mit 2,6‐Dichlorbenzaldehyd und Butanon entsteht neben 3c und 4c das kristalline Aldol 7. Alle ungesättigten Ketone werden oximiert und die Oxime 2und5 dc getrennt.