On-Water Synthesis of 2-Substituted Quinolines from 2-Aminochalcones Using Benzylamine as the Nucleophilic Catalyst
作者:So Young Lee、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b01675
日期:2018.11.2
On-water synthesis of 2-substituted quinolines from 2-aminochalcone derivatives was developed using benzylamine as the nucleophilic catalyst. Various 2-aminochalcones could be applied to this protocol, and the desired 2-substituted quinoline products were isolated in excellent yields by simple filtration. Furthermore, we elucidated the role of benzylamine in this transformation and provided the detailed
A new cross‐cycloaddition reaction between a wide range of isocyanides and 2‐isocyanochalcones (or analogues) was developed for the expeditious synthesis of pyrrolo[3,4‐b]indoles under thermal conditions. On the basis of the experimental results and DFT calculations, a mechanism for this domino reaction is proposed involving chemoselective heterodimerization of two different isocyanides to form 1,4‐diazabutatriene
Continuous Flow Synthesis of Quinolines via a Scalable Tandem Photoisomerization‐Cyclization Process
作者:Mara Di Filippo、Marcus Baumann
DOI:10.1002/ejoc.202000957
日期:2020.10.22
A continuous flow process exploiting a light‐driven method for generating a series of drug‐like quinolines is reported and applied to the synthesis of the alkaloid natural product galipinine.
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‐Butoxide‐Mediated Synthesis of 3,4′‐Biquinolines from 2‐Aminochalcones
作者:Jiye Jeon、So Young Lee、Cheol‐Hong Cheon
DOI:10.1002/adsc.201900029
日期:2019.5.14
protocol to synthesize 3,4’‐biquinolinesfrom2‐aminochalcones in the presence of a stoichiometric amount of sodium tert‐butoxide as the nucleophilic promotor was developed. Conjugate addition of tert‐butoxide to 2‐aminochalcones provided the corresponding enolates, which underwent Michael addition to another molecule of 2‐aminochalcone to afford a dimeric species of 2‐aminochalcones. Subsequent cyclization
Solid state aldol reactions of solvated and unsolvated lithium pinacolone enolate aggregates
作者:Huan Pang、Paul G. Williard
DOI:10.1016/j.tet.2019.130913
日期:2020.2
unsolvated lithium pinacolone enolate with a variety of solid aromatic aldehydes utilizing a mortar and pestle condition in comparison with the simple ball milling condition or tetrahydrofuran (THF) solution condition. In solution, the reactions are highly-selective with the aldol condensation product at room temperature. Under the condition of mortar and pestle, the reactions with unsolvated lithium pinacolone