26832-42-8Relevant articles and documents
Ruthenium?p-cymene complexes with acylthiourea, and its heterogenized form on graphene oxide act as catalysts for the synthesis of quinoxaline derivatives
Bhuvanesh, Nattamai,Gopiraman, Mayakrishnan,Karvembu, Ramasamy,Sindhuja, Dharmalingam,Vasanthakumar, Punitharaj
, (2021/06/30)
Synthesis of a series of half-sandwich Ru(II) complexes (1-5) containing acylthiourea ligand is reported herein. All the Ru(II) complexes were well characterized by analytical and spectroscopic (UV-Vis, FT-IR, NMR and mass spectrometry) methods. Molecular structures of two (2 and 3) of the complexes were confirmed by single crystal X-ray diffraction, and the complexes adopted pseudo-octahedral geometry around Ru. Catalytic ability of the Ru complexes was evaluated in the synthesis of quinoxaline compounds from various 2-nitroaniline and hydroxy ketone derivatives via transfer hydrogenation approach. Active homogeneous catalyst was heterogenized by supporting it on graphene oxide, and the heterogeneous equivalent was characterized by Raman, XPS, TEM, SEM and ICP-OES techniques. Activity of the heterogeneous catalyst was tested, and it can be reused up to five cycles without any loss in activity.
Synthesis method of quinoxaline heterocyclic derivative
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Paragraph 0034-0037, (2020/05/30)
The invention discloses a synthesis method of a quinoxaline heterocyclic derivative. An intermolecular redox reaction and a condensation cyclization reaction are carried out on an o-nitroaniline compound and an o-diol compound under the action of a water-soluble alkali to prepare the quinoxaline heterocyclic derivative in one step. Expensive transition metal catalysts and ligands do not need to beused, the water-soluble alkali is used as an accelerant and can be removed in a water washing manner, so that the product has no transition metal residue, the product is easy to separate, the recovery rate is high, and the method is simple in condition, easy to operate and low in equipment requirement; and the water-soluble alkali is used as the accelerant, so the unique byproduct is water, the atom economy is high, and the method has good research and industrial application prospects.
A green solid acid catalyst 12-tungstophosphoric acid H3[PW12O40] supported on g-C3N4 for synthesis of quinoxalines
Kumaresan, Murugan,Saravanan, Vadivel,Sami, Ponnusamy,Swaminathan, Meenakshisundaram
, p. 4193 - 4209 (2020/07/08)
A green Keggin-type heteropoly-12-tungstophosphoric acid, (H3[PW12O40].12H2O) supported on graphitic carbon nitride g-C3N4 (HPW/g-C3N4-40), was developed for one-pot s
