One-pot synthesis of 4,4ʹ-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols) catalyzed by Brönsted acidic ionic liquid supported on nanoporous Na+-montmorillonite

Synthesis, structure and thermal properties of montmorillonite/ionic liquid ionogels

“…14, spectrum 1), there are bands due to the vibrations of OH groups (3628 and 3440 cm À1 ) and the stretching modes of absorbed water molecules (1631 cm À1 ). 3 The intense broad band with the maximum at 1041 cm À1 corresponds to the Si-O-Si valence vibrations of the tetrahedra in the silicon-oxygen framework. 44 The narrow band at 795 cm À1 corresponds to the deformation vibrations of silanol groups.…”

“…It belongs to the structural family of 2 : 1 phyllosilicates, whose structure includes layers of silicon-oxygen tetrahedra, between which aluminum-oxygen octahedra are enclosed. 3 The MMTs plates have a thickness of about 1 nm.…”

Efficient one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones catalyzed by a new heterogeneous catalyst based on Co-functionalized Na+-montmorillonite

“…Among the surveyed solvents, using EtOH improved the yield of the chemical reaction under study (entry 6). Moreover, to determine the role of catalysts and temperature under solvent-free conditions, the reaction was surveyed with and without heating with the same amount of catalysts (10 mg) (entries [12][13][14]. It was observed that the use of heating leads to faster reaction and a higher yield.…”

Guanine‐La complex supported onto SBA‐15: A novel efficient heterogeneous mesoporous nanocatalyst for one‐pot, multi‐component Tandem Knoevenagel condensation–Michael addition–cyclization Reactions

“…MCRs are currently well‐established methods for the synthesis of heterocycles, natural products and polymers while Double and Triple Cascade Reactions are still a growing field of research. Knoevenagel condensation–Michael addition (Double Cascade Reactions) and Knoevenagel condensation–Michael addition–cyclization (Triple Cascade Reactions) Sequences have been widely studied and frequently applied to the synthesis of natural products and biologically active compounds . These methods are highly valuable for the formation of chiral carbo‐ and heterocyclic compounds with multiple stereocenters which are relevant to the pharmaceutical and medicinal chemistry and useful in the synthesis of various natural products …”