Fe₃O₄@Sap/Cu(ii): an efficient magnetically recoverable green nanocatalyst for the preparation of acridine and quinazoline derivatives in aqueous media at room temperature

Abstract

A highly efficient, robust, and green protocol has been developed for the synthesis of acridine and quinazoline derivatives in water under mild reaction conditions using a Fe3O4@Sap/Cu(ii) nanocomposite as an efficient heterogeneous catalyst.

Sulfated zirconium oxide-decorated magnetite KCC-1 as a durable and recyclable adsorbent for the efficient removal of asphaltene from crude oil

“…Sulfated zirconium oxide was prepared according to a previously reported procedure. 23,24 First, to a solution of 2.3 g of ZrCl 4 (as a precursor) in distilled water (10.0 mL), 10.0 mL of 1.0 N ammonia solution was added dropwise during a span of 30 min to the solution until the solution pH was adjusted to 11.0. The milky solution was aged for a day at room temperature.…”

Catalytic filtration: efficient C-C cross-coupling using Pd(II)-salen complex-embedded cellulose filter paper as a portable catalyst

“…This phenomenon has also been observed for cross-linked catalysts. [48][49][50][51] In other words, in the ltration method, only a part of the reaction mixture in contact with the catalyst surface intends to pass through the catalyst, and this issue increases the effective concentration at the catalyst surface and increases the efficiency. This experiment also showed that the ltration method, as a new and portable method, has an advantage over the heterogeneous method (cutted paper).…”

Application of Cyclohexane‐1,3‐diones in the Synthesis of Six‐Membered Nitrogen‐Containing Heterocycles

“…[165] Heterogeneous catalysts have their own importance in terms of easy recovery by simple filtration and reusability. [166,167] Several easily recoverable and recyclable catalysts have been utilized for the synthesis of acridine-1,8-diones with high to excellent yields for illustration Fe 3 O 4 @Sap/Cu(II) [168] Pt NPs@graphene oxide [169,170] Au/NiAlTi layered double hydroxide nanocatalyst, [171] functionalized multi-walled carbon nanotubes (f-MWCNT) [172] and silica-supported metal NPs. [173][174][175][176] Scheme 21.…”