Direct coupling between β-functionalized organolithium compounds and aryl and vinyl halides
作者:José Barluenga、Javier M. Montserrat、Josefa Flórez
DOI:10.1016/s0040-4039(00)60038-2
日期:1992.10
Treatment of N-lithio-N-(2-lithioethyl)benzamide with different aromatic and vinylic halides affords directly the corresponding substitution products: functionalized benzamides 3 – 10.
Visible-light-induced photocatalytic oxytrifluoromethylation of N-allylamides for the synthesis of CF<sub>3</sub>-containing oxazolines and benzoxazines
A visible-light-induced photocatalytic oxytrifluoro-methylation reaction of N-allylamides has been described for the efficient synthesis of CF3-containing oxazolines and benzoxazines in generally high yields.
exemplified by the CF2H radical-mediated catalytic difluoromethylation of alkenes. However, most of these difluoromethylations proceed under photocatalytic conditions, whereas those requiring thermal conditions are few. Herein, we developed a general and practical method of Cu-catalyzed alkene difluoromethylation with difluoroacetic anhydride (DFAA) as a CF2H source, showing that the thus realized amino-
Direct coupling of functionalized organolithium compounds with aryl and vinyl halides
作者:Jose Barluenga、Javier M. Montserrat、Josefa Florez
DOI:10.1021/jo00074a025
日期:1993.10
The reaction between beta- and gamma-nitrogen-functionalized and gamma- and epsilon-oxygen-functionalized organolithium compounds 3, 4, 30-32 and different aromatic, heteroaromatic, and vinylic halides affords directly the corresponding substitution products: functionalized benzamides 5-26 and alcohols 33-37. Symmetrical and mixed products of double coupling 38-40 were also prepared from 1,4-diiodobenzene. The formation of alkyl halides as intermediates has been verified. Aryl or vinyl halides giving rise to unstable aryl or vinyllithium reagents were unsuccessful in the coupling reaction.
<scp>Manganese‐Catalyzed Anti‐Markovnikov</scp>
Hydroarylation of Enamides: Modular Synthesis of Arylethylamines
construction of a rich chemical space of arylethylamine motif. In this report, a practical protocol for the synthesis of arylethylamine functionality common in pharmaceutical chemicals has been developed. It proceeds by Mn-catalyzed anti-Markovnikov hydroarylation of electron-rich enamides under mild conditions without the use of ligands. In spite of mismatched electronic effects during the manganese-mediated