期刊
POLYCYCLIC AROMATIC COMPOUNDS
卷 43, 期 1, 页码 895-914出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10406638.2021.2021252
关键词
Multicomponent reaction; 1H-Pyrazolo[1; 2-b]phthalazine-5; 10-diones; DIPEAc; Ionic liquid; Microwave Assisted Synthesis
In this study, bioactive compounds were successfully synthesized using task-specific ionic liquids as catalysts. The method offers mild reaction conditions, high recyclability, and environmental friendliness.
In the frame of research that examines the use of task-specific ionic liquids (ILs) for developing green methodologies toward bioactive substituted 1H-pyrazolo[1,2-b]phthalazine-5,10-diones derivatives via one-pot condensation of aldehydes, malononitrile and phthalhydrazide presence of Diisopropyl Ethyl Ammonium Acetate (DIPEAc-IL) as catalyst under conventional reflux as well as microwave irradiation condition. providing the desired product in very satisfactory yields (up to 94%) and high purity after simple workup. The task-specific ILs were recycled and reused four times without a noticeable decrease in their catalytic activity. Mild conditions with excellent conversions and simple product isolation procedures are noteworthy advantages of this method. The recyclability of the ionic liquid makes this protocol environmentally benign.
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