A nitrogen-enriched nanoporous polytriazine was used as a metal-free heterogeneous organocatalyst for high-yielding ultra-fast Knoevenagel reactions under ambient conditions.
A convenient, rapid and metal free synthesis of 5-substituted-1H-tetrazoles by [3 + 2] cycloaddition reaction of nitriles with sodium azide. Cuttlebone as a natural low cost heterogeneous catalyst affords 5-substituted-1H-tetrazoles rapidly with high efficiency.
Nitrogen doped reduced graphene oxide (N-rGO) was found to be an efficient metal free and heterogeneous catalyst for the esterification of different fatty compounds including Bischofia javanica and Toona ciliata fatty acids with long chain alcohols.
In this work, a facile, efficient and metal free catalytic system has been developed for the synthesis of tetrahydrobenzo[a]xanthene derivativesviaa one-pot three-component condensation of various aldehydes, 2-naphthol, and dimedone.
Acidic polymer containing sulfunic acid and carboxylic acid groups heterogenized with natural clay: A novel metal free and heterogeneous catalyst for acid-catalyzed reactions