TY - JOUR
T1 - Oxidative coupling of carboxylic acids or benzaldehydes with DMF using hydrotalicite-derived oxide catalysts
AU - Samudrala, Priya S.
AU - Nakhate, Akhil V.
AU - Gupta, Shyam Sunder R.
AU - Rasal, Kalidas B.
AU - Deshmukh, Gunjan P.
AU - Gadipelly, Chandrakanth R.
AU - Theegala, Srinivas
AU - Dumbre, Deepa K.
AU - Periasamy, Selvakannan
AU - Komandur, V. R. Chary
AU - Bhargava, Suresh K.
AU - Mannepalli, Lakshmi Kantam
PY - 2019/1
Y1 - 2019/1
N2 - Hydrotalcite-derived (HT-derived) oxide catalysts were synthesised from hydrotalcite-like (HT-like) materials prepared by co-precipitation method (Cu-Al, Cu-Fe, Mg-Al, Mg-Fe, Ni-Fe and Ni-Al) followed by calcination and their catalytic activity was studied for oxidative amidation of carboxylic acids and substituted benzaldehydes with N,N-dimethylformamide (DMF). Catalyst screening was done using benzoic acid and DMF as a model reaction. Subsequently, we have optimised the reaction with different reaction parameters, catalyst loading, temperatures and oxidants. Cu-Fe HT-derived oxide catalyst showed excellent activity towards oxidative amidation using TBHP as an oxidant at 80 °C in 10 h. The fresh and spent catalysts were thoroughly characterised by different analytical techniques; XRD, SEM, HRTEM, TPD, N2 adsorption-desorption isotherm and XPS. Moreover, the catalyst was easily separated by simple filtration and reused up to four cycles without significant loss in catalytic activity.
AB - Hydrotalcite-derived (HT-derived) oxide catalysts were synthesised from hydrotalcite-like (HT-like) materials prepared by co-precipitation method (Cu-Al, Cu-Fe, Mg-Al, Mg-Fe, Ni-Fe and Ni-Al) followed by calcination and their catalytic activity was studied for oxidative amidation of carboxylic acids and substituted benzaldehydes with N,N-dimethylformamide (DMF). Catalyst screening was done using benzoic acid and DMF as a model reaction. Subsequently, we have optimised the reaction with different reaction parameters, catalyst loading, temperatures and oxidants. Cu-Fe HT-derived oxide catalyst showed excellent activity towards oxidative amidation using TBHP as an oxidant at 80 °C in 10 h. The fresh and spent catalysts were thoroughly characterised by different analytical techniques; XRD, SEM, HRTEM, TPD, N2 adsorption-desorption isotherm and XPS. Moreover, the catalyst was easily separated by simple filtration and reused up to four cycles without significant loss in catalytic activity.
KW - Aldehydes
KW - Carboxylic acid
KW - Dimethylformamide
KW - Heterogeneous catalyst
KW - Oxidative coupling
UR - https://www.scopus.com/pages/publications/85039555144
U2 - 10.1016/j.apcatb.2017.12.058
DO - 10.1016/j.apcatb.2017.12.058
M3 - Article
AN - SCOPUS:85039555144
SN - 0926-3373
VL - 240
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -