One-pot synthesis of chromenes in the presence of nano-cellulose/Ti(IV)/Fe3O4 as natural-based magnetic nano-catalysts under solvent free conditions

Raziyeh Gholami; Abdolhamid Bamoniri; Bi Bi Fatemeh Mirjalili

doi:10.1039/d2ra05057a

One-pot synthesis of chromenes in the presence of nano-cellulose/Ti^(IV)/Fe₃O₄ as natural-based magnetic nano-catalysts under solvent free conditions

RSC Adv. 2022 Sep 28;12(42):27555-27563. doi: 10.1039/d2ra05057a. eCollection 2022 Sep 22.

Authors

Raziyeh Gholami¹, Abdolhamid Bamoniri¹, Bi Bi Fatemeh Mirjalili²

Affiliations

¹ Department of Organic Chemistry, Faculty of Chemistry, University of Kashan Kashan I. R. Iran bamoniri@kashanu.ac.ir +98-31-55912384.
² Department of Chemistry, Faculty of Science, Yazd University Yazd I. R. Iran.

Abstract

In this study, the preparation of magnetic catalysts of titanium tetrachloride stabilized on nano-cellulose named cellulose/Ti^(IV)/Fe₃O₄ was investigated. Various methods such as XRD, SEM, FT-IR, BET, EDX, TEM, TGA and VSM were used to characterize the catalysts. Then, the identified catalysts were used for the synthesis of various chromene skeletons via reaction of malononitrile, aldehyde and dimedone, 4-hydroxycoumarine or 2-naphthole at 70 °C under solvent free conditions. The spectroscopic methods used to determine the structure of the products include ¹³C NMR, ¹H NMR and FT-IR.