Synthesis of 2-Substituted Quinolines from 2-Aminostyryl Ketones Using Iodide as a Catalyst
作者:So Young Lee、Jiye Jeon、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b00552
日期:2018.5.4
A new protocol for the synthesis of 2-substituted quinolinesfrom 2-aminostyryl ketones has been developed using iodide as a nucleophilic catalyst. Conjugate addition of iodide to 2-aminostyryl ketones yielded the corresponding β-iodoketones, which could have a conformation where the amino and carbonyl groups are proximal through free rotation about the Cα–Cβ single bond. Subsequent condensation between
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 blue-light-promoted carbon-carbon double bondisomerization in the absence of any photoredox catalyst is reported. It provides rapid access to a series of quinolines in good to excellent yields under simple aerobic conditions. The protocol is direct, catalyst-free and operationally convenient.
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
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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