136285-25-1Relevant academic research and scientific papers
Immobilized N-Heterocyclic Carbene-Palladium(II) Complex on Graphene Oxide as Efficient and Recyclable Catalyst for Suzuki–Miyaura Cross-Coupling and Reduction of Nitroarenes
Kandathil, Vishal,Kulkarni, Bhakti,Siddiqa, Aisha,Kempasiddaiah, Manjunatha,Sasidhar,Patil, Shivaputra A.,Patil, Siddappa A.
, p. 384 - 403 (2020)
Abstract: A new and efficient N-heterocyclic carbene (NHC)-palladium(II) complex immobilized on graphene oxide (NHC-Pd@GO) has been successfully designed and synthesized. The prepared NHC-Pd@GO heterogeneous catalyst was fully characterized using a combination of fourier transform infrared spectroscopy (FTIR), inductively coupled plasma-optical emission spectroscopy (ICP-OES), energy-dispersive X-ray spectroscopy (EDS), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA) and Brunauer–Emmett–Teller surface area analysis (BET). This new air- and moisture-stable NHC-Pd@GO heterogeneous catalytic system was found to be a highly active catalyst in the Suzuki–Miyaura cross-coupling between phenylboronic acid and various aryl halides (bromides/chlorides/iodides) and in the reduction of nitroarenes. These organic transformations were best performed in an aqueous ethanol and aqueous methanol solvent system respectively with low catalyst loading under mild reaction conditions. Furthermore, NHC-Pd@GO heterogeneous catalyst could be recovered easily and reused at least eleven times in Suzuki–Miyaura cross-coupling and nine times in reduction of nitroarenes without any considerable loss of its catalytic activity. The stability and good selectivity of the NHC-Pd@GO heterogeneous catalyst in recycling experiments signify that it could be useful for practical application in various organic transformations. Graphic Abstract: [Figure not available: see fulltext.].
Design, synthesis and pharmacological analysis of 5-[4′-(substituted-methyl)[1,1′-biphenyl]-2-yl]-1H-tetrazoles
Kamble, Atulkumar,Kamble, Ravindra,Dodamani, Suneel,Jalalpure, Sunil,Rasal, Vijaykumar,Kumbar, Mahadev,Joshi, Shrinivas,Dixit, Sheshagiri
, p. 444 - 457 (2017/04/13)
In the present paper 5-[4′-({4-[(4-aryloxy)methyl]-1H-1,2,3-triazol-1-yl}methyl)[1,1′-biphenyl]-2-yl]-1H-tetrazoles (5a–g) and [2′-(1H-tetrazol-5-yl)[1,1′-biphenyl]-4-yl]methyl-substituted-1-carbodithioates (11h–q) have been designed and synthesized. These compounds were subjected to docking (against AT1 receptor protein enzyme in complex with Lisinopril), in vitro angiotensin converting enzyme inhibition, anti-proliferative, anti-inflammatory screening (through egg albumin denaturation inhibition and red blood cell membrane stabilization assay) and finally anti-fungal activity analyses. Some of the compounds have shown significant pharmacological properties.
Benzimidazole derivatives and their use
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, (2008/06/13)
Novel imidazole derivatives of the formula (I): STR1 wherein R1 is an optionally substituted alkyl group, R2 and R3 are independently a group capable of forming an anion or a group which can be changed thereinto, ring A is a benzene ring optionally having, besides the group shown by R2, further substituents, and X shows linkage of phenylene group and phenyl group directly or through a spacer whose atomic length is not more than 2 and a salt thereof, show antagonistic actions to angiotensin II, thus being useful as therapeutics for cardiovascular diseases.
