已经描述了嘧啶环化喹啉的合成,其结构类似于生物碱中存在的生物活性苯并萘啶。我们的合成策略基于改良的Pictet-Spengler反应,涉及的底物包括失活的嘧啶环作为亲核伴侣,而源自嘧啶环C-4的芳基胺则作为亲电子伴侣的来源。将得到的基片5 - 7具有分集在2-和6-位缩合后与各种醛的6-行内的环化,得到嘧啶并[5,4- c ^〕喹啉14丰产。然而,试图在涉及吡啶环作为亲核伴侣的新的结构相似的底物上进一步扩展该策略的尝试失败,从而限制了反应的范围。
Cp*Rh<sup>III</sup>
-Catalyzed Directed Amidation of Aldehydes with Anthranils
作者:Suvankar Debbarma、Modhu Sudan Maji
DOI:10.1002/ejoc.201700457
日期:2017.7.7
towards construction of amide C–N bonds under mild conditions through rhodium(III) catalysis has been explored. Previous waste-free amidations were generally limited to the condensation of carboxylic acids and amines. In this report, we directly applied amination of the aldehyde C(sp2)–H bond to extend the scope of amidation reactions. The amination shows a wide substratesscope, and several important
In an effort to develop new antimicrobial agents, a series of chalconederivatives, 3-60, were prepared by Claisen-Schmidt condensation of appropriate acetophenones and 2-furyl methyl ketones with appropriate aromatic aldehydes, furfural, and thiophene-2-carbaldehyde in an aqueous solution of NaOH and EtOH at room temperature. The synthesized compounds were characterized by means of their IR- and NMR-spectral
Three-Component Synthesis of a Library of <i>m</i>-Terphenyl Derivatives with Embedded β-Aminoester Moieties
作者:Damiano Rocchi、Juan F. González、Jorge Gómez-Carpintero、Víctor González-Ruiz、M. Antonia Martín、Vellaisamy Sridharan、J. Carlos Menéndez
DOI:10.1021/acscombsci.8b00137
日期:2018.12.10
allowed the construction of a large library of highly substituted dihydro-m-terphenyl derivatives containing β-alkylamino- or β-arylamino ester moieties. This process generates three new bonds and one ring and proceeds in high atom economy, having two molecules of water as the only side product. Another domino process, in which the original MCR was telescoped with a subsequent aza Michael/retro-aza Michael
烷基-或芳基胺之间的三组分反应,β酮酯和查耳酮在回流的含Ce(IV)铵的催化量的乙醇允许高度取代的二氢的大型文库的构建米含β -烷基氨基-三联苯衍生物-或β-芳基氨基酯部分。该过程产生三个新的键和一个环,并以高原子经济性进行,只有两个分子的水是唯一的副产物。另一个多米诺骨牌工艺,其中原始MCR用随后的aza Michael / retro-aza Michael序列进行伸缩,可以一锅制备带有N的化合物库-未取代的β-氨基酯片段。最后,为了扩展这些文库的结构多样性,我们还研究了在二氯二氰基醌存在下我们化合物中心环的芳构化。该反应序列不影响属于氨基组分的立体异构中心的完整性。
One-Pot Synthesis of Functionalized Carbazoles via a CAN-Catalyzed Multicomponent Process Comprising a C–H Activation Step
作者:Juan F. González、Damiano Rocchi、Tomás Tejero、Pedro Merino、J. Carlos Menéndez
DOI:10.1021/acs.joc.7b01199
日期:2017.7.21
a double annulation process that generates two C–C and two C–N bonds, with water as the only side product. Mechanistically, this transformation has some unusual features that include an intramolecular coupled hydrogenation-dehydrogenation process, the functionalization of a C–H group by direct attack onto a nitrogen function and a CAN-catalyzed reduction via hydride transfer from ethanol. The mechanisms
Antiproliferative effects of chalcones on T cell acute lymphoblastic leukemia‐derived cells: Role of PKCβ
作者:Emanuela Corsini、Giorgio Facchetti、Sara Esposito、Ambra Maddalon、Isabella Rimoldi、Michael S. Christodoulou
DOI:10.1002/ardp.202000062
日期:2020.7
series of 20 chalcone derivatives was synthesized, and their antiproliferative activity was tested against the human Tcellacutelymphoblasticleukemia‐derivedcell line, CCRF‐CEM. On the basis of the structural features of the most active compounds, a new library of chalcone derivatives, according to the structure–activity relationship design, was synthesized, and their antiproliferative activity was