Results 71 to 80 of about 30,899 (241)

Synthesis and Characterization of Chiral Nitrobenzaldehyde - Schiff Base Ligands

Molecules, 2003
Three chiral nitrobenzaldehyde/Schiff base ligands (2a-c) were prepared by the reaction of ortho, meta, and para-NO2 substituted benzaldehydes (1a-c) with (1R,2R)-(-)-1,2-diaminocyclohexane. The structures of ligands 2a-c were characterized by IR, 1H-NMR,
Zhuo Zheng, Wen Tao Gao
doaj   +1 more source

Oxidation of benzaldehyde in some single phase betaine-benzaldehyde-water systems

Journal of Pharmacy and Pharmacology, 1964
AbstractThe oxidation rates of increasing concentrations of benzaldehyde in ternary systems of the L1 type have been measured in aqueous solutions of four betaine homologues. On applying corrections for extra-micellar material, the rate becomes independent of the betaine concentration and is related to the micellar ratio of benzaldehyde to betaine when
J, SWARBRICK, J E, CARLESS
openaire   +2 more sources

One‐Pot Ruthenium‐Catalyzed Synthesis of Benzyl/Allyl‐Halide Substituted (dihydro)naphthalenes via Radical Benzannulation

ChemistryEurope, EarlyView.
A one‐pot protocol to synthesize reactive benzyl‐ and allyl‐halide‐substituted (dihydro)naphthalenes from 2,3‐aryl‐1,3‐butadiene substrates and halogenated alkanes has been developed, using [Cp*RuCl(PPh3)2] as the catalyst. Mechanistic studies revealed an atom transfer radical addition and radical benzannulation sequence, followed by HCl elimination ...
Nicole S. van Leeuwen, David Vesseur, Thijmen Bonhoff, Jeffrey van Laar, Coert E. J. van Lare, Simon Mathew, Sonja Pullen, Joost N. H. Reek, Aalbert Zwijnenburg, Bas de Bruin   +9 more
wiley   +1 more source

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

Chemistry – A European Journal, EarlyView.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

(2‐Phosphinophenyl)aluminum Dichloride Complexes as Intramolecular Al/P Frustrated Lewis Pairs for Ketone, Ester, and Imine Activation

Chemistry – A European Journal, EarlyView.
Three 2‐phosphinophenylaluminum dichloride complexes were synthesized and characterized as novel intramolecular FLPs. These FLP systems exhibit high Lewis acidity and effectively activate challenging substrates including aliphatic ketones, imines, and esters. DFT analysis revealed that strain release and Al–P dynamics govern their reactivity. Abstract (
Yoshihiro Nishimoto, Hirotaka Okamoto, Makoto Yasuda   +2 more
wiley   +1 more source

Crystal structure of 4-{[(2,4-dihydroxybenzylidene)amino]methyl}cyclohexanecarboxylic acid

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C15H19NO4, the cyclohexyl ring adopts a chair conformation with both exocyclic C—C bonds in equatorial orientations. The dihedral angle between the basal plane of cyclohexyl ring and the 2,4-dihydroxybenzaldehyde moiety is 84.13 ...
Muhammad Danish, Saba Akbar, Muhammad Nawaz Tahir, Rabia Ayub Butt, Muhammad Ashfaq   +4 more
doaj   +1 more source

The One‐Step Synthesis of Biologically Active Isochromans from Lignin‐Derived Aromatic Monomers in Tunable Deep Eutectic Solvents

Chemistry – A European Journal, EarlyView.
A straightforward one‐step protocol enables the synthesis of bio‐based and biologically active isochromans through the Oxa‐Pictet cyclization involving diverse aldehydes, including vanillin in combination with lignin‐derivable homovanillyl alcohol, a prominent aromatic platform chemical obtainable via diol‐assisted fractionation of lignocellulose ...
Anjali Kottayi, Anastasiia M. Afanasenko, Antonio A. Castillo‐Garcia, Walid A. M. Elgaher, Jörg Haupenthal, Anna K. H. Hirsch, Katalin Barta   +6 more
wiley   +1 more source

Pharmaceuticals Made with Hydrogen: A Sustainable and Efficient Approach Using Flow Synthesis

Chemistry – A European Journal, EarlyView.
We demonstrate a sustainable strategy for pharmaceutical manufacturing by combining hydrogen, heterogeneous catalysis, and continuous flow synthesis. The development of novel catalysts and their application in a multi‐step synthesis of donepezil enabled a highly productive process with no intermediate purification.
Shū Kobayashi, Haruro Ishitani
wiley   +1 more source

Porphyrin‐Geländer–Helical Conjugated Banister Type Porphyrin Dyads

Chemistry – A European Journal, EarlyView.
Porphyrin arrays go chiral–A porphyrin Geländer macrocycle represents the intriguing prototype architecture of helically chiral butadiyne‐linked porphyrin arrays. This study combines synthetic, spectroscopic, and computational methods to shed light on its structure, chiroptical properties, and tunability, highlighting its promise for advancing ...
Joël F. Keller, Adriano D'Addio, Marcel Mayor   +2 more
wiley   +1 more source

Application of a Polymer-Bound Thiazolium Salt to the Synthesis of Alpha-Hydroxy Ketones with an Aromatic and Aliphatic Substituent (Bencyloins) [1] [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1993
Alpha-Hydroxy ketones with an aromatic and aliphatic substituent were prepared with condensation of aromatic and aliphatic aldehydes in the presence of polymer-bound thiazolium salt.
Khashayar Karimian, Farajollah Mohanazadeh   +1 more
doaj