Cu(II)-grafted 2D-hexagonal mesoporous material as an efficient catalyst for Sonogashira C-C cross-coupling reaction
2nd International Symposium on Functional Nanomaterials in Industrial Applications: Academy - Industry Meet, Preston, İngiltere, 14 - 16 Nisan 2020, cilt.45, ss.3733-3740, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 45
- Doi Numarası: 10.1016/j.matpr.2020.12.1156
- Basıldığı Şehir: Preston
- Basıldığı Ülke: İngiltere
- Sayfa Sayıları: ss.3733-3740
- Anahtar Kelimeler: Sonogashira C-C cross-coupling reaction, Nanoscale porosity, Water as solvent, Heterogeneous catalysis, Grafting of Cu(II), Functionalized mesoporous material
- Atatürk Üniversitesi Adresli: Hayır
Özet
Replacing expensive Pd-catalysts by a low cost and sustainable catalytic system is one of the major challenging areas of research in synthetic organic chemistry. Herein, we report a new Cu(II)-anchored mesoporous catalyst (SBA-NH2-L-Cu) by immobilizing Cu(II) over organic ligand (L) anchored amino functionalized mesoporous SBA-15 (SBA-NH2-L) material. SBA-NH2-L-Cu has been characterized by different physicochemical techniques like powder X-ray diffraction (PXRD), Fourier-transform infrared (FTIR), high resolution transmission electron microscopy (HRTEM), N2 sorption, X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) and thermo-gravimetric analysis (TGA). SBA-NH2-L-Cu has been employed as an efficient heterogeneous catalyst in the Sonogashira C-C cross-coupling reaction for the synthesis of aromatic alkynes in the 1: 1 solvent mixture of 1,4-dioxan and water in the presence of K2CO3 base and very minor amount of Pd/C (5% on active charcoal, 0.25 mol%) as co-catalyst at 80 °C in 4 h reaction time. The catalyst is easy to handle and recycled for several times without any significant loss in catalytic activity.