Results 31 to 40 of about 51,441 (193)

Degradation of chlorinated benzaldehydes in aqueous solutions by UV-irradiation

International Journal of Photoenergy, 2002
Photoinduced degradation of chlorinated benzaldehydes was investigated using UV light with λ = 253.7 nm in aerated aqueous solutions. Substrate degradation rate as expressed by first order reaction kinetics revealed rate constants, k; 7.45×10−3 min-1, 3 ...
Miray Bekbölet, Nikola Getoff
doaj   +1 more source

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

Large acceleration under highly concentrated conditions: Synthesis of chalcones using a small amount of DMF or [emim]N(CN)2

Results in Chemistry, 2022
A variety of chalcones were synthesized by the reactions between benzaldehydes and acetophenones catalyzed by Ba(OH)2. The reactions in the presence of a small amount of DMF or 1-ethyl-3-methylimidazolium dicyanamide ([emim]N(CN)2) were faster than those
Kiyoshi Tanemura
doaj   +1 more source

Benzaldehyde-Functionalized Polymer Vesicles [PDF]

ACS Nano, 2009
Polymer vesicles with diameters of ca. 100-600 nm and bearing benzaldehyde functionalities within the vesicular walls were constructed through self-assembly of an amphiphilic block copolymer PEO(45)-b-PVBA(26) in water. The reactivity of the benzaldehyde functionalities was verified by cross-linking the polymersomes and also by a one-pot cross-linking ...
Guorong, Sun, Huafeng, Fang, Chong, Cheng, Peng, Lu, Ke, Zhang, Amy V, Walker, John-Stephen A, Taylor, Karen L, Wooley   +7 more
openaire   +2 more sources

Tricarbonyl(h6-Arene)Chromium(0) Complexes as Chiral Auxiliaries: Asymmetric Synthesis of b-Lactones

Molecules, 2001
The optically pure tricarbonyl(h6-2-substituted benzaldehydes)chromium are used as chiral auxiliaries in the condensation with a series of doubly lithiated carboxylic acids. The intramolecular ring closure of the obtained Cr(CO)3 complexed b-hydroxyacids
Deborah Montrasio, Paola Del Buttero
doaj   +1 more source

Lewis acid-catalyzed redox-neutral amination of 2-(3-pyrroline-1-yl)benzaldehydes via intramolecular [1,5]-hydride shift/isomerization reaction

Beilstein Journal of Organic Chemistry, 2014
Lewis acid-catalyzed redox-neutral amination of 2-(3-pyrroline-1-yl)benzaldehydes via intramolcular [1,5]-hydride shift/isomerization reaction has been realized, using the inherent reducing power of 3-pyrrolines.
Chun-Huan Jiang, Xiantao Lei, Le Zhen, Hong-Jin Du, Xiaoan Wen, Qing-Long Xu, Hongbin Sun   +6 more
doaj   +1 more source

Síntese de derivados 4-aril-3,4-di-hidrocumarínicos catalisada por NbCl5

Química Nova, 2013
Multicomponent reactions between phenols, β-diesters and benzaldehydes for the synthesis of 4-aryl-3,4-dihydrocoumarin derivatives were carried out under mild conditions (room temperature) and presented moderate yields (38-88%) and reasonable reaction ...
Willian Henrique dos Santos, Mayara de Souza Siqueira, Luiz Carlos da Silva-Filho   +2 more
doaj   +1 more source

Synthesis of Oxygenated ortho-Methylbenzaldehydes via Aryne [2+2] Cycloaddition and Benzocyclobutenol Ring Opening

CHIMIA, 2018
Herein, a two-step procedure for the preparation of oxygenated ortho-methylbenzaldehyde derivatives, starting from commercially available bromoarenes, is described.
Mark M. Maturi, Ken Ohmori, Keisuke Suzuki   +2 more
doaj   +1 more source

On the application of knoevenagel condensation for the synthesis of benzylidene benzothiazine compounds and structural study

Química Nova, 2006
The synthesis and physico-chemical properties of new 6-acetylamino or 6-benzoyl-amino 2-benzylidene-4-methyl-4H-benzo[1,4]thiazin-3-ones and 6-benzoylamino or 6-nitro 2-benzylidene-4H-benzo[1,4]thiazin-3-ones are described.
Ana Maria Alves de Souza, Vera Lucia de Miranda Guarda, Lúcia Fernanda Cavalcanti da Costa Leite, José Maria Barbosa Filho, Maria do Carmo Alves de Lima, Suely Lins Galdino, Ivan da Rocha Pitta   +6 more
doaj   +3 more sources

Synthesis and Spectral Characterization of Some New Substituted Bis-spirocyclohexanones Derived from Acetone

Science Journal of University of Zakho, 2018
Diarylidene acetones (DAA) (1-5) had been prepared by the condensation of acetone with substituted benzaldehydes via Claisen-Schmidt reaction, DAA’s brought to condense with anthrone to afford the title compounds (6-10) through Michael addition.
Mohammed S. Hussein, Abdul Wahab J. Al-Hamdany, Rana A. Saeed   +2 more
doaj   +1 more source