The indole ring system is present in many natural products, pharmaceuticals,
agrochemicals, and other compounds of importance. 1–8 The indole unit forms the basis for …

The last decade has witnessed a high demand of various synthetic approaches towards
bioactive achiral diarylmethanols, diaryl and triarylmethanes and the molecules derived …

Urea‐based ionic liquid stabilized on silica‐coated Fe3O4 magnetic nanoparticles,{Fe3O4
@ SiO2@(CH2) 3‐Urea‐SO3H/HCl}, as an unexceptionable and smooth releasing urea …

Brönsted acid catalysts have been used in a number of organic transformations. To
overcome limitations, such as toxicity, volatility, high price and hazardous nature of the …

As an economical conjugated polymer, graphitic carbon nitride (g-C3N4) has recently
attracted much attention due to its exciting chemical and thermal stability and easy …

A green and environmentally benign protocol for squaric acid catalyst electrophilic
substitution reactions of indole derivatives, with various aldehydes in water, in good to …

An efficient and facile synthesis of hydrazones, bis (indolyl) methanes and bis (4-
hydroxycoumarin) methanes is facilitated by room temperature ionic liquid choline chloride …

A simple, clean, and highly efficient green protocol has been developed for synthesis of bis
(indolyl), di (bis-indolyl), and tris-indolyl methanes by the reaction of indole with aldehydes …

Three new heterogeneous catalysts of 3-methyl-1-sulfonic acid imidazolium transition metal
chlorides [Msim][X](where X=[FeCl 4]−,[ZnCl 3]−,[CuCl 2]−) were synthesized containing …

A highly efficient protocol for the synthesis of 1, 2, 3, 4-tetrahydropyridines in the presence of
nano-sphere silica sulfuric acid (NS-SSA) was used for good yields by one-pot …