Condensation of fluorosubstituted benzaldehydes with amines and cyclic 1,3-diketones
摘要:
Condensation of fluorosubstituted benzaldehydes with 2-naphthyl or 6-quinolylamine and cyclic beta-diketones (,3-cyclohexanedione, dimedone, and 1,3-indandione) provided new fluoroderivatives of benzo[a]acridine, 4,7-phenanthroline, and benzo[f]indeno[1,2-b]quinoline. Forming in the course of the reaction fluorophenylmethylene-2-naphthyl-(or 6-quinolyl)amines, arylbis(cyclohexane-1,3-dion-2-yl)methanes, and 2-(fluorophenylmethylene)- 1,3-indandiones were isolated.
Merging supramolecular catalysis and aminocatalysis: amino-appended β-cyclodextrins (ACDs) as efficient and recyclable supramolecular catalysts for the synthesis of tetraketones
作者:Yufeng Ren、Bo Yang、Xiali Liao
DOI:10.1039/c6ra01002d
日期:——
β-CD were synthesized and employed in the catalytic synthesis of a series of tetraketones as supramolecular catalysts in water for the first time. Yields of 58–97% were obtained with up to 30 examples of substrate. The catalyst could be recycled easily, while a 92% yield and 84% rate of catalyst recovery could be achieved after 8 cycles of catalyst recycling. Moreover, a catalytic mechanism merging
A Green and Highly Efficient Protocol for Catalyst-free Knoevenagel Condensation and Michael Addition of Aromatic Aldehydes with 1,3-Cyclic Diketones in PEG-400
作者:Nemati Firouzeh、Kiani Hossein
DOI:10.1002/cjoc.201100005
日期:2011.11
A convenient, highlyefficient and green approach for synthesis of tetraketones from aromaticaldehydes with dimedone and 1,3‐indanedione at room temperature in PEG‐400 is described. The use of PEG‐400 as the reaction medium and avoiding the use of any catalyst makes the process environmentally benign. Seven new compounds are reported.