337496-58-9

Upstream product

• 126-81-8 dimedone 
• 3218-36-8 4-Phenylbenzaldehyde 
• 109-77-3 malononitrile 

Relevant academic research and scientific papers

Mn(III)–pentadentate Schiff base complex supported on multi-walled carbon nanotubes as a green, mild and heterogeneous catalyst for the synthesis of tetrahydrobenzo[b]pyrans via tandem Knoevenagel–Michael cyclocondensation reaction

Mn(III)–pentadentate Schiff base complex supported on multi-walled carbon nanotubes as a recyclable and reusable, green and nano-heterogeneous catalyst was designed and fully characterized using infrared spectroscopy, X-ray diffraction, scanning electron

Solvent Selective Polyacrylonitrile Fiber as a Recyclable Catalyst for the Knoevenagel-Michael Reaction in Water

Heterogeneous catalysis is an important branch of sustainable chemistry. In this work, a series of polyacrylonitrile fiber (PANF) fiber catalysts (PANF-E, PANF-EDs, and PANF-D) with different catalytic micro-environments are developed and characterized by

Zn (II)-Schiff base covalently anchored to CaO@SiO2: A hybrid nanocatalyst for green synthesis of 4H-pyrans

In this study, the Zn (II)-Schiff base covalently anchored onto the surface of CaO@SiO2 nanoparticles. The structure of this hybrid nanomaterial (CaO@SiO2-NH2-Sal-Zn) was characterized using the analytical techniques such

Three-component condensation reaction of various aldehydes, dimedone and malononitrile catalyzed by boric acid in water in comparison with multifunctional ionic liquids as green catalytic systems

Triethanol ammonium acetate ([TEAH]+[OAc]-) and triethanol ammonium formate ([TEAH]+[HCOO]-) as multifunctional ionic liquids and catalysts were successfully applied for the preparation of tetrahydrobenzo[b]pyra

Multi-wall carbon nanotube supported Co (II) Schiff base complex: an efficient and highly reusable catalyst for synthesis of 1-amidoalkyl-2-naphthol and tetrahydrobenzo[b]pyran derivatives

An immobilized Co (II) Schiff base complex supported on multi-wall carbon nanotubes was synthesized and characterized using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, the

A facile, eco-friendly, proton donor-acceptor catalyzed, one-pot, three-component synthesis of tetrahydrobenzo[b]pyrans

Piperidinium acetate catalyzed, three-component cyclocondensation between aryl aldehydes (1), malononitrile (2) and cyclic-1,3-diketo compounds (3) in the eco-friendly and universal solvent water at room temperature for 0.5 h, resulted in the formation of tetrahydro[b]pyran derivatives (4). The formation of 4 could also be established in a step-wise fashion by isolating independently each of the intermediates benzylidine malononitrile 5 and benzylidine cyclohexane-1,3-dione 6 and treating them subsequently with 3 and 2, respectively to obtain benzopyrans 4. Mechanistic studies on the formation of 4 from 1, 2 and 3 are reported. Further, the synthesis of 4 could also be achieved in two variable but identical end-product giving tandem syntheses by treating 1 with 2 and then with 3 giving 4 or by treating 1 with 3 and then with 2 giving 4. All the products were suitably characterized using NMR, IR and Mass spectroscopy.

Tandem Knoevenagel-Michael-cyclocondensation reactions of malononitrile, various aldehydes and dimedone using acetic acid functionalized ionic liquid

An efficient solvent-free protocol for the synthesis of tetrahydrobenzo[b]pyrans by the condensation of malononitrile, dimedone and various aldehydes in the presence of acetic acid functionalized imidazolium salts (1-carboxymethyl-3-methylimidazolium brom

A Novel Task Specific & Thermally Stable Ionic Liquid (TBA Acetate) for the Synthesis of Pyran Annulated Heterocyclic System

A simple and efficient synthesis of pyran annulated heterocyclic compounds has been developed by reaction of aryl aldehydes, malanonitrile and cyclic-1,3-diketones using tetra butyl ammonium acetate (TBAA) melt as cost-effective and recyclable ionic liqui