King Fahd University of Petroleum and Minerals

Imam Abdulrahman Bin Faisal University

M Nasiruzzaman Shaikh

Md Abdul Aziz

Aasif Helal

S M Shakil Hussain

Zain Hassan Yamani

Hamad M Alkahtani

Samar A Abubshait

Sara Nabil Shaban

Fadilah Sfouq Aleanizy

Haya A Abubshait

Asma Mohmmad Elsharif

A method of making a pyrazole compound includes mixing a diazonium salt with a reactant in the presence of a solvent, thereby coupling a diazo group of the diazonium salt to an α-carbon atom of the reactant to form a reaction intermediate having a formula of (I) or (II); mixing the reaction intermediate and hydrazine in the presence of a superparamagnetic iron oxide nanoparticles catalyst thereby cyclizing the hydrazine with an ester group of the reaction intermediate to form the pyrazole compound having a formula of (III) or (IV).

2-aminothiazoles derivatives and method of preparation thereof using super-paramagnetic iron oxide nanoparticles (SPIONs)

A method for making a magnetic-nanoparticle-supported catalyst includes reacting a ferrocenyl phosphine compound with an amino alcohol compound to form a ligand having a phosphine group, an amine group and at least one hydroxyl group; anchoring the ligand to a surface of magnetic nanoparticles via an oxygen atom of the hydroxyl group to form a ligand complex; combining the ligand complex with a metal precursor comprising Rh to bind the metal precursor with the ligand complex and form the magnetic-particle-supported catalyst. The magnetic-particle-supported catalyst is a Rh complex of magnetic-FeO-nanoparticle-supported ferrocenyl phosphine catalyst.

Magnetic-nanoparticle-supported catalyst and method of making

Method for making FeOmagnetic catalysts

Sonication method for making magnetic supported catalysts

A solid-supported Pd catalyst is suitable for C—C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., KPdClwith NaBHin water, and then used this as a 'dip catalyst.' The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.

Green method for preparing jute stem-supported catalyst

Method for making an unmodified jute supported catalyst

Method for making natural material-supported palladium catalyst

Method for making magnetic nanoparticle supported catalysts

Method of preparing solid-supported palladium catalyst

A supported catalyst having rhodium particles with an average diameter of less than 1 nm disposed on a support material containing magnetic iron oxide (e.g. FeO). A method of producing the supported catalyst and a process of reducing nitroarenes to corresponding aromatic amines employing the supported catalyst with a high product yield are also described. The supported catalyst may be recovered with ease using an external magnet and reused.

Process for reducing aromatic nitro compounds with supported catalyst

A solid-supported Pd catalyst is suitable for C&#x2014;C bond formation, e.g., via Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions, with a support that is reusable, cost-efficient, regioselective, and naturally available. Such catalysts may contain Pd nanoparticles on jute plant sticks (GS), i.e., Pd@GS, and may be formed by reducing, e.g., KPdClwith NaBHin water, and then used this as a 'dip catalyst.' The dip catalyst can catalyze Suzuki-Miyaura and Mizoroki-Heck cross coupling-reactions in water. The catalysts may have a homogeneous distribution of Pd nanoparticles with average dimensions, e.g., within a range of 7 to 10 nm on the solid support. Suzuki-Miyaura cross-coupling reactions may achieve conversions of, e.g., 97% with TOFs around 4692 h, Mizoroki-Heck reactions with conversions of, e.g., a 98% and TOFs of 237 h, while the same catalyst sample may be used for 7 consecutive cycles, i.e., without addition of any fresh catalyst.

Jute stick-palladium nanoparticle dip catalysts useful for aqueous Suzuki-Miyaura and Mizoroki-Heck C&#x2014;C bond formation

Iron oxide supported rhodium catalyst for nitroarene reduction

Chemoselective and regioselective hydrogenation can be conducted using green sources, e.g., metal nanoparticles on plant stem supports in water. Heterogeneous catalytic systems, including 'dip catalysts,' can catalyze transfer hydrogenation of, e.g., styrenics, unfunctionalized olefins, quinolines, and other N-heteroaromatics. Palladium nanoparticles having longest dimensions of, e.g., 15 to 20 nm, may be anchored on jute plant (genus) stem supports, i.e., 'green' supports (GS). Pd nanoparticles can be decorated onto the jute stem (GS) by in-situ reduction of, e.g., KPdCl, in aqueous medium at 70&#xb0; C., using formic acid as the reducing agent. The Pd-GS show uniform distribution of Pd on the cellulose matrix of the jute stem, and can conduct chemoselective transfer hydrogenation of numerous styrenics, olefins, and heterocycles (including aromatics) with high functional group tolerance, even in water.

Jute stem-supported palladium-NPS and use as dip-catalysts for aqueous transfer hydrogenation

A zirconium metal-organic framework, which is a coordination product formed between zirconium ion clusters and a linker that links together adjacent zirconium ion clusters, wherein the linker is of formula (I) wherein Rto Rare independently hydrogen, an optionally substituted alkyl, an optionally substituted aryl, an optionally substituted arylalkyl, an optionally substituted alkoxy, a hydroxyl, a carboxyl, a halo, a nitro, or a cyano, Ris hydrogen, an optionally substituted alkyl, an optionally substituted alkoxy, an amino, a hydroxyl, a carboxyl, a halo, a nitro, or a cyano, and Rand Rare independently a hydrogen or an optionally substituted alkyl group having 1 to 4 carbon atoms. A method of detecting copper cations and/or chromate anions in a fluid sample with zirconium metal-organic framework.

Zirconium metal-organic framework and a method of detecting copper and chromate ions

A method of reducing an aromatic ring under relatively mild condition using sub-nano particles of a transition metal supported on super paramagnetic iron oxide nanoparticles (SPIONs). The catalyst is efficient for catalyzing the reduction of both carbocyclic and heterocyclic compound. In compound comprising both carbocyclic and heterocyclic aromatic rings, the catalyst displays high regioselectivity for the heterocyclic ring.

Growing community of inventors

Dhahran, Saudi Arabia

M Nasiruzzaman Shaikh