A regioselective formal [4 + 2] cycloaddition for the assembly of highly functionalized benzene rings was successfully developed. In this reaction, olefinic C–H bond functionalization/cyclization cascadereaction followed by rearomatization led to the desired molecules in one step under mild reaction conditions. This protocol also displays a broad substrate scope and good tolerance to a wide range
A Rh(III)-catalyzed enaminone-directed alkenyl C–H coupling with alkynes for the synthesis of salicylaldehyde derivatives is reported. This represents a unique example of benzene ring framework formation through a transition-metal-catalyzed, directed C–Hactivation strategy. The two incorporated reactive functionalities, aldehyde and hydroxy groups, provide convenient synthetic handles for further
KRISTOFCAK J.; KOVAC J.; DANDAROVA M.; VEGH D., CHEM. PAP., 40,(1986) N 5, 665-672
作者:KRISTOFCAK J.、 KOVAC J.、 DANDAROVA M.、 VEGH D.
DOI:——
日期:——
Studies with enaminones: reactivity of 1,5-disubstituted-1,4-pentadien-3-ones toward electrophilic reagents. a novel route to azolylazines, benzofuranals, pyranones
作者:Saleh Al-Mousawi、Seham El-Sherbiny、Elizabeth John、Mervat Mohammed Abdel-Khalik、Mohammed Hilmy Elnagdi
DOI:10.1002/jhet.5570380422
日期:2001.7
Several new enaminodienones prepared from substituted acetone and dimethylformamide dimethylacetal were used as precursors for synthesis of pyridines, pyranones and benzofurans.