One-pot synthesis of chromenes in the presence of nano-cellulose/Ti<sup>(IV)</sup>/Fe<sub>3</sub>O<sub>4</sub> as natural-based magnetic nano-catalysts under solvent free conditions
作者:Raziyeh Gholami、Abdolhamid Bamoniri、Bi Bi Fatemeh Mirjalili
DOI:10.1039/d2ra05057a
日期:——
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