Macroporous metal oxides as an efficient heterogeneous catalyst for various organic transformations—A comparative study

Syntheses of 2‐Unsubstituted 1H‐1,3‐Benzazaphospholes from N‐Formyl‐2‐bromoanilides

“…The syntheses of air‐sensitive P(III)‐compounds were carried out under dry nitrogen using Schlenk techniques and freshly distilled dry solvents. 2‐Bromoformanilide ( 1a ) was prepared by CuO‐catalyzed conversion of formic acid and 2‐bromoaniline . Commercially available starting materials (2‐bromoaniline and LiAlH 4 from Alpha Aesar, p ‐toluidine, Me 2 NCH(OMe) 2 (DMFA) and ClSiMe 3 from Acros) were used as received unless indicated otherwise.…”

Greener Solvent-Free Reactions on ZnO

“…Modern processes are in fact, based on solid catalysts. Different researcher groups have been reported that ZnO exhibit one of the best performance in the Friedel-Crafts acylation of various benzene derivatives in solvent freeconditions, (Ashoka et al, 2010;Hosseini-Sarvari & Sharghi, 2004;Thakuria et al, 2007;Wang et al, 2008), (Scheme 1).…”

Mn/Al2O3 and Mn/ZrO2 as selective catalysts for the synthesis of bis(indolyl)methanes: The role of surface acidity and particle morphology

“…Zeolites [1], heteropoly acids [2], clays [3] and metal oxides [4] have been extensively used as acid-base heterogeneous catalysts in organic synthesis. The processes have been found to be very economical and eco-friendly.…”