Green and efficient synthesis of acridine-1,8-diones and hexahydroquinolines via a KH2PO4 catalyzed Hantzsch-type reaction in aqueous ethanol
作者:Shi-Jun Yü、Si Wu、Xin-Min Zhao、Cheng-Wei Lü
DOI:10.1007/s11164-016-2814-2
日期:2017.5
A simple, clean, and economical methodology for the synthesis of acridine-1,8-dione and hexahydroquinoline derivatives via Hantzsch-type condensation has been described. This study highlights the development of a new green pathway for the preparation of substituted 1,4-dihydropyridines derivatives. The mild, cheap, and nontoxic potassium dihydrogen phosphate (KH2PO4) is proved to be an efficient catalyst for the above multi-component reaction to get excellent yields. Widely available and mostly benign catalyst, eco-friendly solvent, and easy purification are among the several attractive features.
Abstract Chitosan, a biodegradablegreencatalyst, was found to be an impressive system for one-pot four-component reaction of different aldehydes, dimedone, β‐ketoesters or acetoacetanilide, and ammonium acetate leading to 1,4-dihydropyridine derivatives via Hantzsch-type condensation under solvent-free condition. This methodology produces diverse superiorities such as operational simplicity, short
Dihydroquinolines via the Hantsch Reaction using Hydroxylammonium Carboxylates as Efficient and Recyclable Catalysts under Solvent-free Conditions
作者:Yinglei Wang、Xueguo Liu、Chaojun Du
DOI:10.1080/00304948.2017.1260394
日期:2017.1.2
exploited as solvents and/or catalysts in organic synthesis over the past decades, due to their favorable properties including negligible vapor pressure, high thermal and chemical stability, excellent solubility, ease of recovery and recyclabilty. Therefore, the development of multi-componentreactions in ionic liquids is currently an active area of research. Dihydroquinoline derivatives have attracted considerable
Cd(NO<sub>3</sub>)<sub>2</sub>.4H<sub>2</sub>O Catalyzed One-Pot Synthesis of 1,4-Dihydropyridine and Polyhydroquinoline Derivatives through the Hantzsch Multicomponent Condensation
The synthesis of various 1,4‐dihydropyridine and polyhydroquinoline derivatives was achieved in good to excellent yields using cadmium (II) nitrate as catalyst to promote the classical and modified Hantzsch conditions in good yields under mild conditions.
Sulfamic acid immobilized on amino‐functionalized magnetic nanoparticles: A new and active magnetically recoverable catalyst for the synthesis of N‐heterocyclic compounds
amino‐functionalized magneticnanoparticles (MNPs/DETA‐SA) was successfully fabricated and characterized using various techniques. Diameters of approximately 15 nm for the MNPs/DETA‐SA were observed from scanning electron microscopy images. The as‐fabricated nanocomposite was applied as an efficient and magneticallyreusablecatalyst for the synthesis of 2,3‐dihydroquinazoline‐4(1H)‐one and polyhydroquinoline derivatives