Aza-Michael reactions between primary aliphatic and aromatic amines and various Michael acceptors have been performed under environmentally-friendly solventless conditions using acidic alumina as a heterogeneous catalyst to selectively obtain the corresponding mono-adducts in high yields. Ethyl acrylate was the main acceptor used, although others such as acrylonitrile, methyl acrylate and acryl...

Enzyme catalyzed reactions are green alternative approaches to functionalize polymers compared to conventional methods. This technique is especially advantageous due to the high selectivity, high efficiency, milder reaction conditions, and recyclability of enzymes. Selected reactions can be conducted under solventless conditions without the application of metal catalysts. Hence this process is ...

Arylboron compounds have intriguing properties and are important building blocks for chemical synthesis. A family of Ir catalysts now enables the direct synthesis of arylboron compounds from aromatic hydrocarbons and boranes under "solventless" conditions. The Ir catalysts are highly selective for C-H activation and do not interfere with subsequent in situ transformations, including Pd-mediated...

The isomerization of estragole to trans-anethole is an important reaction and is industrially performed using an excess of NaOH or KOH in ethanol at high temperatures with very low selectivity. Simple Ru-based transition-metal complexes, under homogeneous, ionic liquid (IL)-supported (biphasic) and "solventless" conditions, can be used for this reaction. The selectivity of this reaction is more...

A series of ZnBr2 impregnated on rice husk ash silica catalysts were synthesised via the wet impregnation method for CO2 cycloaddition to styrene oxide reaction. The X-ray diffraction (XRD) analysis indicates that resulted in deterioration silica's pore channels. Catalyst with 0.5 w/w% Zn (0.5 wt %ZnBr2-SiO2) was highly active oxide. conversion (StO) 89.1 %, carbonate (SC) selectivity 92.1 % un...

The exploitation of visible-light active photocatalytic materials can potentially change the supply energy and deeply transform our world, giving access to a carbon neutral society. Currently, most photocatalysts are produced through low-ecofriendly, dispersive, fossil-based synthesis. Over last few years, research has focused on development innovative heterogeneous by design sustainable green ...