Aluminium-based ionic liquid grafted on biochar as a heterogeneous catalyst for the selective synthesis of tetrazole and 2,3-dihydroquinazolin 4(1H)-one derivatives

Abstract

2,3-Dihydroquinazolin-4(1H)-one and tetrazole are a class of nitrogen-containing heterocyclic compounds that play an important role in drug design and are an important part of many biological and industrial compounds.

A new neodymium complex on renewable magnetic biochar nanoparticles as an environmentally friendly, recyclable and efficient nanocatalyst in the homoselective synthesis of tetrazoles

“…67,68 The FT-IR spectrum of BNPs showed several characteristic peaks at about 3422 cm −1 , indicating stretching vibrations of surface oxygen-based functional groups such as alcohol, phenol, and carboxylic acid groups. 45 Stretching vibrations of CC bonds were identified by a strong peak at 1590 cm −1 . 45 The several bands at 468, 789 and 1039 cm −1 correspond to the vibrations of Si–O–Si, indicating successful modification of BMNPs with 3-CPTMS.…”

“… 45 Stretching vibrations of C C bonds were identified by a strong peak at 1590 cm −1 . 45 The several bands at 468, 789 and 1039 cm −1 correspond to the vibrations of Si–O–Si, indicating successful modification of BMNPs with 3-CPTMS. 26 Stretching vibrations of C–H bonds were characterized in FT-IR spectra by several peaks lower than 3000 cm −1 .…”

“…15–18 Therefore, nanocatalysts as a bridge between homogeneous and heterogeneous catalysts have recently received attention because they have high catalytic activity and are easily recycled and reused, so they do not have the disadvantages of conventional catalysts, while having their own advantages. 19–22 In this context, different nanoparticles such as mesoporous silica materials, 23–25 graphene oxide, 26 polymers, 27,28 hercynite, 29 MOF nanoparticles, 30–32 boehmite, 33–36 magnetic nanoparticles, 37,38 carbon nanostructures, 39,40 biochar, 41–45 etc. have been reported as catalysts or catalyst supports.…”