Montmorillonite Clay-Promoted, Solvent-Free Cross-Aldol Condensations under Focused Microwave Irradiation
作者:Damiano Rocchi、Juan González、J. Menéndez
DOI:10.3390/molecules19067317
日期:——
An environmentallybenign, clean and general protocol was developed for the synthesis of aryl and heteroaryl trans-chalcones. This method involved solvent-free reaction conditions undermicrowaveirradiation in the presence of a clay-based catalyst, and afforded the target compounds in good yields and short reaction times. Furthermore, the same conditions allowed the synthesis of symmetrical, diarylmethylene-α
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。
Cooperative <i>N</i>-Heterocyclic Carbene/Lewis Acid Catalysis for Highly Stereoselective Annulation Reactions with Homoenolates
作者:Benoit Cardinal-David、Dustin E. A. Raup、Karl A. Scheidt
DOI:10.1021/ja910666n
日期:2010.4.21
A new approach that takes advantage of N-heterocyclic carbene/Lewis acidcooperativecatalysis provides access to cis-1,3,4-trisubstituted cyclopentenes from enals and chalcone derivatives with high levels of diastereoselectivity and enantioselectivity. The presence of Ti(OiPr)(4) as the Lewis acid allows for efficient substrate preorganization, which translates into high levels of diastereoselectivity
The present invention relates to the field of anti-invasive compounds and methods for predicting the anti-invasive activity of said compounds, as well as their use in the prevention and/or treatment of diseases associated with undesired cell invasion; in particular, this invention relates to the field of anti-invasive chalcone-like compounds.
Solution phase synthesis of a spiro[pyrrolidine-2,3′-oxindole] library via a three component 1,3-dipolar cycloaddition reaction
作者:Demosthenes Fokas、William J. Ryan、David S. Casebier、David L. Coffen
DOI:10.1016/s0040-4039(98)00234-2
日期:1998.4
A combinatorial library of 26,500 spiro[pyrrolidine-2,3′-oxindoles] was prepared in a single-compound format by a facile intermolecular 1,3-dipolarcycloaddition. An azomethine ylide, generated by the decarboxylative condensation of an isatin 1 with an α-amino acid 2, was trapped by a trans-chalcone3 to afford heterocycles of the general structure 4. The regio- and stereochemistry of a representative