3740-92-9Relevant articles and documents
3,3'-((Arylmethylene)bis(4-methoxy-3,1-phenylene)) dipyridine derivatives as convenient ligands for Suzuki–Miyaura chemo- and homoselective cross-coupling reactions
Hosseini, Raziyeh,Mohammadiannejad, Kazem,Ranjbar-Karimi, Reza
, (2021/08/25)
Four novel N,N-bidentate triarylmethane-based ligands bearing β-pyridyl residues have been prepared and the catalytic activity of their in-situ generated palladium complexes were studied in the Suzuki–Miyaura cross-coupling reactions. Air and moisture stable 3,3'-((arylmethylene)bis(4-methoxy-3,1-phenylene))dipyridines L1-3 showed excellent activity in the Suzuki coupling reactions of aryl halides with aryl boronic acids under thermal and sonochemical reaction conditions. The described methodology provided good to high yields in short reaction times at ambient conditions. Moreover, it offered a straightforward way for Suzuki–Miyaura chemo- and homoselective cross-coupling of aryl halides with phenyl boronic acid. The structures of synthesized compounds were fully characterized by FT-IR, 1H-NMR, 13C-NMR, and elemental analyses. The coordination of palladium acetate to nitrogen sites of L1 was also studied using FTIR spectroscopy, EDX analysis and SEM observations. Graphic abstract: The in-situ generated Pd-complexes of N,N-bidentate ligands L1-3 are described as robust and highly effective catalytic systems for the Suzuki cross-coupling of aryl halides with aryl boronic acids under thermal and sonochemical reaction conditions.[Figure not available: see fulltext.]
Electropolymerization of [2 × 2] grid-type cobalt(II) complex with thiophene substituted dihydrazone ligand
Napiera?a, Sergiusz,Kubicki, Maciej,Patroniak, Violetta,Wa??sa-Chorab, Monika
, (2021/01/12)
The grid-type complex [Co4(L1-2H)4] containing dihydrazone ligand decorated with thiophene rings has been prepared. The complex undergoes oxidative electropolymerization onto ITO electrode to form purple thin film. The morphology of
Tandem Schiff-Base Formation/Heterocyclization: An Approach to the Synthesis of Fused Pyrazolo-Pyrimidine/Isoxazolo-Pyrimidine Hybrids
Sambaiah,Mallesham, Poosa,Shiva Kumar,Bobde, Yamini,Hota, Prasanta Kumar,Yennam, Satyanarayana,Ghosh, Balaram,Behera, Manoranjan
, p. 586 - 592 (2019/03/07)
A new synthesis of pyrazolo[4,3-d]pyrimidines and isoxazolo[4,5-d]pyrimidines is described. Key steps in the synthesis involve Stille coupling of 4,6-dichloro-2-phenyl-pyrimidine with tributyl(1-ethoxyvinyl)stannane and tandem Schiff-base formation/heterocyclization of 2,6-di-aryl-5-fluoro-4-acetylpyrimidine with hydrazines or hydroxylamine to give pyrazolo[4,3-d]pyrimidines and isoxazolo[4,5-d]pyrimidines, respectively. The position of the fluoro group in the A-pyrimidine ring is important for the success of heterocylization reaction.
