Results 31 to 40 of about 57,620 (321)

Novel and efficient oxidation of benzyl ethers to benzaldehydes by DMSO​/49​% aqueous HB [PDF]

, 2007
Dimethylsulfoxide (DMSO) oxidizes benzyl ethers into corresponding benzaldehydes at 110°; the reaction is accelerated by 49​% aq. HBr. The conditions work well for different aryl-​substituted benzyl ethers.
Pasha, M.A., Ramesh Naik, .
core   +1 more source

Can we predict reactivity for aromatic nucleophilic substitution with [ 18 F]fluoride ion? [PDF]

, 1993
The correlation between the 13 C‐NMR chemical shift of the aromatic ring carbon bearing the leaving group and the yield of nucleophilic aromatic displacement with no‐carrier‐added [ 18 F]fluoride ion was evaluated.
Chakraborty, Pulak K., Kilbourn, Michael R., Rengan, Ramesh   +2 more
core   +1 more source

Solvent‐free synthesis, spectral correlations and antimicrobial activities of some 3,4‐ dimethoxy chalcones [PDF]

QScience Connect, 2012
Background: The aim of this study was to synthesise some substituted styryl 3,4-dimethoxy phenyl ketones using solvent-free SiO2-H2SO4 catalyzed aldol condensation between 3,4- dimethoxy acetophenone and substituted benzaldehydes under microwave ...
V. Mala, K. Sathiyamoorthi, SP Sakthinathan, D. Kamalakkannan, R. Suresh, G. Vanangamudi, G. Thirunarayanan   +6 more
doaj   +1 more source

Spectroscopic Properties of Polycyclic Aromatic Compounds. Examination of Nitromethane as a Selective Fluorescence Quenching Agent for Alternant Polycyclic Aromatic Nitrogen Hetero-Atom Derivatives [PDF]

, 1992
Article on the spectroscopic properties of polycyclic aromatic compounds and an examination of nitromethane as a selective fluorescence quenching agent for alternant polycyclic aromatic nitrogen hetero-atom ...
Acree, William, Kimihiro, Hiruta, Langhals, Heinz, Tanga, Mary, Tokita, Sumio, Tucker, Sheryl A.   +5 more
core   +1 more source

Bio-inspired iron-catalyzed oxidation of alkylarenes enables late-stage oxidation of complex methylarenes to arylaldehydes

Nature Communications, 2019
Oxidation of toluenes to benzaldehydes is usually accompanied by overoxidation products. Here, the authors report an iron-catalysed aerobic oxidation of methylarenes to benzaldehydes with high yields and selectivities, even in presence of boronic acid ...
Penghui Hu, Mingxi Tan, Lu Cheng, Hongyuan Zhao, Rui Feng, Wei-Jin Gu, Wei Han   +6 more
doaj   +1 more source

Application of Deep Eutectic Solvents in Promiscuous Lipase-Catalysed Aldol Reactions [PDF]

, 2016
Financial support to this work was provided by the Spanish Ministerio de Economía y Competitividad (MEC) (CTQ2013-44153-P) and the Gobierno del Principado de Asturias (FC-15- GRUPIN14-002).
González Martínez, Daniel, Gotor Fernández, Vicente, Gotor Santamaría, Vicente Miguel   +2 more
core   +3 more sources

The green Knoevenagel condensation: solvent-free condensation of benzaldehydes

Green Chemistry Letters and Reviews, 2017
This paper presents a novel, green Knoevenagel procedure for the chemical transformation of benzaldehydes into their corresponding α,β-unsaturated acids.
Jack van Schijndel, Luiz Alberto Canalle, Dennis Molendijk, Jan Meuldijk   +3 more
doaj   +1 more source

Syn-selective silicon Mukaiyama-type aldol reactions of (pentafluoro-λ6-sulfanyl)acetic acid esters with aldehydes

Beilstein Journal of Organic Chemistry, 2018
Aldol reactions belong to the most frequently used C–C bond forming transformations utilized particularly for the construction of complex structures. The selectivity of these reactions depends on the geometry of the intermediate enolates.
Anna-Lena Dreier, Andrej V. Matsnev, Joseph S. Thrasher, Günter Haufe   +3 more
doaj   +1 more source

Friedel–Crafts reaction of indoles for (3-indolyl)methyl ethers under basic condition: Application in unsymmetrical bis(indolyl)methanes

Results in Chemistry, 2021
An efficient process to prepare (3-indolyl)methyl ethers from various indoles and benzaldehydes under basic conditions was reported. The effects of bases, solvents were investigated.
Zubiao Zheng, Daoxin Zha, Peng Cui, Huan Zhang, Changjiang Li, Jianjun Shi, Bingbing Han   +6 more
doaj   +1 more source

A Facile Solvent Free Claisen-Schmidt Reaction: Synthesis of α,α′-bis-(Substituted-benzylidene)cycloalkanones and α,α′-bis-(Substituted-alkylidene)cycloalkanones

Molecules, 2012
Solvent-free Claisen-Schmidt reactions of cycloalkanones with various substituted benzaldehydes (aryl aldehydes) using solid NaOH (20 mol%) and applying a grinding technique were studied.
Yurngdong Jahng, A. F. M. Motiur Rahman, Roushown Ali, Adnan A. Kadi   +3 more
doaj   +1 more source