Ionic liquid-functionalized magnetic nanostructures as an efficient catalyst for the synthesis of 6H-chromeno[4,3-b]quinolin-6-ones

Abstract

A novel imidazole ionic liquid (IL)-functionalized [Formula: see text]-[Formula: see text] ([Formula: see text]) is prepared by the functionalization of [Formula: see text] by 1-butyl-3-(3-trimethoxypropyl)-1H-imidazol-3-ium chloride as the IL moiety. The catalyst is characterized by transmission electron microscopy, scanning electron microscope, vibrating sample magnetometer, dynamic light scattering and Fourier transform infrared spectroscopy. [Formula: see text] showed good activity in the synthesis of 6H-chromeno[4,3-b]quinolin-6-one derivatives via multicomponent reaction of 4-hydroxycoumarin, anilines and benzaldehydes. The nanocatalyst is magnetically separable and easily recoverable and showed successful activity up to 10 runs.

Synthesis, characterization and application of Fe3O4@SiO2@CPTMO@DEA‐SO3H nanoparticles supported on bentonite nanoclay as a magnetic catalyst for the synthesis of 1,4‐dihydropyrano[2,3‐c]pyrazoles

“…Recently, magnetic nanoparticles (MNPs) have been particularly respected by scientists due to their potential catalytic applications in science and technology . MNPs as both homogeneous and heterogeneous catalysts, in single and composite forms, have some advantages such as easy separation and dispersion, high reactivity and improved catalytic properties of supports . Therefore, the NB surface can be modified to increase its sorption capability.…”

“…[17] MNPs as both homogeneous and heterogeneous catalysts, in single and composite forms, have some advantages such as easy separation and dispersion, high reactivity and improved catalytic properties of supports. [22][23][24][25][26] Therefore, the NB surface can be modified to increase its sorption capability. For better separation of NB from the reaction mixture, magnetic materials such as Fe 3 O 4 can be decorated on the surface of NB and subsequently modified by organic and inorganic linkers.…”

Facile Non‐Transition Metal‐Catalyzed Synthesis of 2‐Thioxo‐2,3‐dihydroquinazolin‐4(1H)‐one Derivatives via One‐Pot Multicomponent Reactions

“…Following our ongoing efforts for the synthesis of quinazolinone derivatives, we hereby, report a method for the synthesis of 3‐alkyl/aryl‐2‐thioxo‐2,3‐dihydroquinazolin‐4(1 H )‐one derivatives . The products are obtained from the multicomponent reaction of isatoic anhydride, aniline and amine derivatives, chloroform and sulfur in the presence of potassium tert ‐butoxide (Scheme ).…”

DABCO‐modified super‐paramagnetic nanoparticles as an efficient and water‐compatible catalyst for the synthesis of pyrano[3,2‐c:5,6‐c']dichromene‐6,8‐dione derivatives under mild reaction conditions

“…1,4‐Diazabicyclo[2.2.2] octane (DABCO) is a very common base, which is used as a catalyst in various reactions . Continuing our previous efforts in the immobilization of the catalysts on nanoparticles for the synthesis of reusable catalysts on one hand, and the synthesis of biologically active organic compounds on the other hand, in this report a novel catalyst is introduced for the synthesis of pyrano[3,2‐ c :5,6‐ c ']dichromene‐6,8‐dione derivatives. The catalyst is prepared based on the immobilization of DABCO on magnetic nanoparticles (DABCO‐SPION).…”