Saccharose as a new, natural, and highly efficient catalyst for the one-pot synthesis of 4,5-dihydropyrano[3,2-c]chromenes, 2-amino-3-cyano-4H-chromenes, 1,8-dioxodecahydroacridine, and 2-substituted benzimidazole derivatives
Saccharose was applied as a green and natural catalyst for the one-pot, three-component condensation between aromatic aldehydes, malononitrile, and resorcinol, or 4-hydroxycoumarine to afford the corresponding pyran-annulated heterocyclic systems. This green methodology offers several advantages such as the use of a non-hazardous catalyst, easy access, clean work-up, excellent yields, short reaction time, and environmentally mild conditions. In addition, 1,8-dioxodecahydroacridine and 2-substituted benzimidazole derivatives have been synthesized from commercially available starting materials, arylaldehydes, dimedone, amines, or ammonium acetate and o-phenylenediamine using the mentioned catalyst.
Novel Brønsted Acidic Ionic Liquid ([CMIM][CF3COO]) Prompted Multicomponent Hantzsch Reaction for the Eco-Friendly Synthesis of Acridinediones: An Efficient and Recyclable Catalyst
AbstractsA novel, highlyefficient and recyclable Brønsted acidic ionicliquid ([CMIM][CF3COO]) has been successfully implemented for the synthesis of acridinediones in aqueous media. Recyclability of novel catalyst, high yields, use of environmentally benign aqueous media as solvent, simple product isolation, high atom economy and sidestep to column chromatography are the noteworthy features of this
摘要:一种新型、高效且可回收的布朗斯台德酸性离子液体 ([CMIM][CF3COO]) 已成功用于在水性介质中合成吖啶二酮。新型催化剂的可回收性、高产率、使用对环境无害的水性介质作为溶剂、产品分离简单、原子经济性高和对柱色谱的回避是该协议的显着特点。该协议能够以良好到出色的产量生产广泛的吖啶二酮库。此外,通过单晶 X 射线衍射证实了 4c 和 4s 衍生物的分子结构和相对立体化学。
Acetic acid as an efficient catalyst for synthesis of 1,8-dioxo-octahydroxanthenes and 1,8-dioxo-decahydroacridines
1,8-Dioxo-octahydroxanthenes have been synthesized in good yields by reaction of arylaldehydes and dimedone in the presence of a catalytic amount of acetic acid, without use of any additional co-catalyst, under solvent-free, thermal conditions. We also report preparation of 1,8-dioxo-decahydroacridines by reaction of arylaldehydes, dimedone, and amines or ammonium acetate under solvent-free, thermal