Sequential Alkylation/Heterocyclization of β-(2-Aminophenyl)-α,β-ynones Promoted by Electrogenerated Carbanions: A New Approach to Functionalized 4-Alkylquinolines
作者:Antonio Arcadi、Leucio Rossi、Gabriele Bianchi、Achille Inesi、Fabio Marinelli
DOI:10.1055/s-2007-973891
日期:2007.4
Electrolysis in a divided cell (nitroalkanes or methanol, in the absence of solvent and supporting electrolyte, as catholite) gave functionalized 4-alkylquinolines in moderate to high yields through a sequential alkylative heterocyclization of β-(2-aminophenyl)-α,β-ynones. The sequential alkylative heterocyclization process can be extended to the reaction of β-(2-aminophenyl)-α,β-ynones with 1,3-dicarbonyls by galvanostatic electrolysis of these latter derivatives in a tetraethylammonium tetrafluoroborate-N,N-dimethylformamide solution.
通过δ-(2-氨基苯基)-δ,δ-炔酮的序贯烷基化杂环反应,在分层电池(硝基烷烃或甲醇,无溶剂和支撑电解质,如阴极石)中进行电解,可得到中高产率的官能化 4-烷基喹啉。通过在四氟硼酸四乙基铵-N,N-二甲基甲酰胺溶液中对δ²-(2-氨基苯基)-δ,δ-炔酮与 1,3-二羰基的电解,可以将顺序烷基化杂环化过程扩展到δ²-(2-氨基苯基)-δ,δ-炔酮与 1,3-二羰基的反应。