Domino Aldol-SNAr-Dehydration Sequence for [3+3] Annulations to Prepare Quinolin-2(1H)-ones and 1,8-Naphthyridin-2(1H)-ones
作者:Kwabena Fobi、Ebenezer Ametsetor、Richard A. Bunce
DOI:10.3390/molecules28155856
日期:——
2-fluorobenzaldehyde derivatives activated toward SNAr reaction by an electron-withdrawing substituent (NO2, CN, CF3, CO2Me) at C5 to prepare 3,6-disubstituted quinolin-2(1H)-ones. Additionally, 3-substituted 1,8-naphthyridin-2(1H)-ones have been similarly derived from 2-fluoronicotinaldehyde. Fifteen examples are reported, and two possible mechanistic scenarios are presented and discussed.
多米诺醇醛-SNAr-脱水[3+3]环化策略已被用来将六元环酰胺融合到芳香族底物上。2-芳基乙酰胺与通过C5处的吸电子取代基(NO2、CN、CF3、CO2Me)对SNAr反应活化的2-氟苯甲醛衍生物反应,制备3,6-二取代的喹啉-2(1H)-酮。此外,3-取代的1,8-萘啶-2(1H)-酮也同样衍生自2-氟烟醛。报告了十五个例子,并提出并讨论了两种可能的机制场景。