Synthesis and Elimination Pathways of 1-Methanesulfonyl-1,2-dihydroquinoline Sulfonamides
作者:Ebenezer Ametsetor、Kwabena Fobi、Richard A. Bunce
DOI:10.3390/molecules28073256
日期:——
Subsequent efforts to eliminate the methylsulfonyl group from these derivatives (K2CO3, DMF, 90 °C) as a route to quinolines were met with mixed results. Although dihydroquinoline sulfonamides prepared from ethyl acrylate and acrylonitrile generally underwent elimination to give excellent yields of quinolines, those generated from 3-buten-2-one failed to undergo elimination and instead decomposed
制备了一系列新的 Morita-Baylis-Hillman 醋酸盐,并与甲磺酰胺(K2CO3,DMF,23 °C)反应,以高收率生产叔二氢喹啉磺酰胺。随后从这些衍生物(K2CO3、DMF、90 °C)中消除甲基磺酰基作为生成喹啉的途径的努力得到了不同的结果。虽然由丙烯酸乙酯和丙烯腈制备的二氢喹啉磺酰胺通常会经过消除以产生出色的喹啉产率,但由 3-丁烯-2-酮 生成的二氢喹啉磺酰胺无法进行消除,而是会分解。这些酮底物无法芳构化可能是由于 C-3 处的可烯醇化甲基酮所致。最后,尝试将丙烯酸酯衍生的 6,7-二氟-1 芳构化,