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• 119-53-9 2-hydroxy-2-phenylacetophenone 
• 95-01-2 2,4-Dihydroxybenzaldehyde 
• 134-81-6 benzil 

Relevant academic research and scientific papers

ESIPT-rhodol derivatives with enhanced Stokes shift: Synthesis, photophysical properties, viscosity sensitivity and DFT studies

Three rhodol derivatives, namely spirolactamized phenanthrene-imidazole, diphenyl-imidazole and benzothiazole substituted N, N-diethylamine rhodols were designed, synthesized and characterized. Their photophysical properties were studied in spirocyclic and open form from non-polar to polar solvents. The spirocyclic form exhibited larger Stokes shifts (50–260 nm) due to presence of ESIPT process whereas, open form showed small Stokes shift (10–40 nm) due to the lack of protons. Positive solvatochromism was observed for both the spirocyclic and open forms which is well supported by the linear (Lippert-Mataga and Mac-Rae) and multi-linear (Kamlet-Taft and Catalan parameters) analysis. Solvent polarizability (dSP) is the major factor responsible for red shift in absorption/emission and larger Stokes shift for spirocyclic form. Polarity graphs and charge transfer descriptors are in good relation with Generalized Mulliken-Hush (GMH) parameters. From the solvatochromic data we observed that open forms show good TICT characteristics as compared to their respective spirocyclic forms. Open form is highly sensitive to viscosity as compared to spirocyclic form in a mixture of polar-protic solvents (EtOH:PEG 400). The experimental results are well correlated theoretically using Density Functional Theory (DFT) computations.

Cyclometallation, steric and electronic tendencies in a series of Pd(II) complex pre-catalysts bearing imidazole-phenol ligands and effects on Suzuki-Miyaura catalytic efficiencies

Abstract A series of new structurally and electronically diversified palladium complexes derived from seven less sterically crowded 2-(4,5-dimethyl-1H-imidazol-2-yl) phenol/2-(4,5-diethyl-1H-imidazol-2-yl) phenol ligands and fourteen 2-(4,5-diphenyl-1H-im

An efficient green MCR protocol for the synthesis of 2,4,5-trisubstituted imidazoles by Selectfluor under ultrasound irradiation

A simple, efficient and eco-friendly procedure has been developed using Selectfluor (15% mol) as a novel catalyst under ultrasound irradiation and solvent-free conditions for the synthesis of 2,4,5-triaryimidazole by a three-component, one-pot condensation of benzil, aryl aldehydes and ammonium acetate. The present methodology offers several advantages such as excellent yields, shorter reaction times (10-15 min) and environmentally benign milder reaction conditions and easy work-up.

Efficient multi-component synthesis of highly substituted imidazoles utilizing P2O5/SiO2 as a reusable catalyst

Phosphorus pentoxide supported on silica gel (P2O 5/SiO2) has been used as an efficient and reusable catalyst for the one-pot pseudo four-component synthesis of 2,4,5-trisubstituted imidazoles from benzil or benzoin, aldehydes, and ammonium acetate. It was also used for four-component preparation of 1,2,4,5-tetrasubstituted imidazoles from benzil or benzoin, aldehydes, primary amine, and ammonium acetate under thermal solvent-free conditions. The remarkable features of this new procedure are high conversions, cleaner reaction, simple experimental and work-up procedures and also the catalyst can be easily separated from the reaction mixture and reused several times without any loss of its activity.

Synthesis of highly substituted imidazoles using Bronsted acidic ionic liquid, triphenyl(propyl-3-sulphonyl)phosphonium toluenesulfonate, as reusable catalyst

Bronsted acidic ionic liquid, triphenyl(propyl-3-sulphonyl) phosphonium toluenesulfonate, has been used as an efficient and reusable catalyst for the one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under solvent-free conditions in excellent yields.

An environmental friendly approach for the synthesis of highly substituted imidazoles using Br?nsted acidic ionic liquid, N-methyl-2-pyrrolidonium hydrogen sulfate, as reusable catalyst

Br?nsted acidic ionic liquid, N-methyl-2-pyrrolidonium hydrogen sulfate, has been used as an efficient and reusable catalyst for the one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles under thermal solvent-free conditions in excellent yields.

Acidic ionic liquid [(CH2)4SO3HMIM] [HSO4]: A green media for the simple and straightforward synthesis of 2,4,5-trisubstituted imidazoles

2,4,5-Trisubstituted imidazoles have been synthesized in excellent yields (85-95%) in the presence of 5mol% of [(CH2)4SO3HMIM] [HSO4] as a Brnsted acidic ionic liquid. Copyright

Ytterbium triflate as an efficient catalyst for one-pot synthesis of substituted imidazoles through three-component condensation of benzil, aldehydes and ammonium acetate

Yb(OTf)3 has been found to be an extremely efficient catalyst for the preparation of imidazoles derivatives via three-component coupling reactions of benzil, aldehydes and ammonium acetate under mild conditions. The process presented here is op