Application of cobalt phthalocyanine as a nanostructured catalyst in the synthesis of biological henna-based compounds
作者:Mohammad Dashteh、Maliheh Safaiee、Saeed Baghery、Mohammad Ali Zolfigol
DOI:10.1002/aoc.4690
日期:2019.4
The present investigation describes synthesis of a good range of henna‐based compounds in the presence of novel nano cobaltphthalocyanine like molten salt (tetra‐2,3‐pyridiniumporphyrazinato cobalt tribromomethanide) [Co (TPPABr)]CBr3 as an efficient, recyclable and thermally stable heterogeneous catalyst.
An Efficient Strategy for the Synthesis of Naphtho[2,3-b][1,6]naphthyridines Promoted by Acetic Acid
作者:Furen Zhang、Zhenlu Shen、Chunmei Li
DOI:10.1055/a-1479-4420
日期:2021.7
A three-component domino reaction for the synthesis of naphtho[2,3-b][1,6]naphthyridine derivatives has been established. Such strategy exhibited excellent substrate scope including various enaminones and aldehydes that afforded a series of multifunctionalized naphtho[2,3-b][1,6]naphthyridine derivatives with 70–86% yields. The advantages of bond-forming efficiency, accessibility of starting materials
Brønsted acidic ionic liquids catalyzed the preparation of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones and 3,4-dihydro-1H-benzo[b]xanthene-1,6,11(2H,12H)-triones
An environmentally green method for the synthesis of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraone and 3,4-dihydro-1H-benzo[b]xanthene-1,6,11(2H,12H)-trione derivatives using Brønsted acidic ionic liquids, 3-methyl-1-sulfonic acid imidazolium chloride, 1-H-3-methyl-imidazolium hydrogensulfate, triethylamine-bonded sulfonic acid, and triethylammonium hydrogensulfate as reusable catalysts under thermal solvent-free conditions is described.
Phosphoric acid supported on alumina (H3PO4/Al2O3) is an efficient catalyst for the catalytic multi-component condensation reaction and a wide variety of syntheses of benzoxanthene pigments in good yields. The remarkable features of this new procedure are high conversions, shorter reaction times, cleaner reaction, and simple experimental and work-up procedures.
A clean, one‐pot and three‐component synthesis of new dibenzo[a,i]xanthene‐diones derivatives by cyclo‐condensation reaction of 2‐hydroxynaphthalene‐1,4‐dione, aromatic aldehydes and dimedone or 2‐naphthol in aqueous media is reported. J. Heterocyclic Chem., (2010).