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Knoevenagel Reaction (knoevenagel + reaction)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Size Control of Catalytic Reaction Space by Intercalation of Alkylcarboxylate Anions into Ni,Zn Mixed Basic Salt Interlayer: Application for Knoevenagel Reaction in Water.

CHEMINFORM, Issue 32 2010
Takayoshi Hara
Abstract The interlayer space of layered Ni-Zn mixed basic salt can be controlled precisely by the intercalation of various carboxylate anions. [source]

ChemInform Abstract: Urotropine: An Efficient Catalyst Precursor for the Microwave-Assisted Knoevenagel Reaction.

CHEMINFORM, Issue 45 2001
Yanqing Peng
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Fluoroapatite/Sodium Nitrate as a Solid Support for the Knoevenagel Reaction.

CHEMINFORM, Issue 39 2001
Said Sebti
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Steric Effects in High Pressure Knoevenagel Reactions.

CHEMINFORM, Issue 16 2001
Gerard Jenner
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

A convenient route to synthesize 1,2,4-triazolo[1,5- a]pyrimidine derivatives and their one and two-photon absorption spectral properties

JOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2007
Hongli Wang
A convenient method for synthesizing ,-(1,2,4-triazolo[1,5- a]pyrimidine-2-sulfonyl)methane derivatives, 3 and 4, by the well known Knoevenagel reaction, in one step, is described. The two chromophores are stilbene-type chromophores containing the same D-,-A structures and end-capped with aromatic group as their donors. Measured with femtosecond multipass Ti:sapphire amplifier as irradiation source (pumped by the laser at 800 nm), the two chromophores show efficient two-photon induced orange red fluorescence emission. The experimental results indicate that the numbers of branches of the two chromophores affect their one-photon properties and two-photon up-conversion emission behaviors, and with the increasing numbers of branches, their wavelengths of ,absmax, ,spfmax and ,tpfmax exhibit bathochromic shifts. [source]

Carbon-14 labelling of selective H3 receptor antagonists

JOURNAL OF LABELLED COMPOUNDS AND RADIOPHARMACEUTICALS, Issue 14 2005
Steen K. Johansen
Abstract The fast and efficient carbon-14 labelling of the three potent H3 antagonists NNC 38-1202, NNC 38-1384, and NNC 38-1401 is reported. The two-step synthetic sequence, which included a Knoevenagel reaction, provided the carbon-14-labelled compounds in 38,55% overall yield starting from [2- 14C]malonic acid. The compounds were all obtained in high radiochemical purity ( > 99%) and with high specific activity (55.8 mCi/mmol). Copyright © 2005 John Wiley & Sons, Ltd. [source]

Organometallic dyes: Part 1.

APPLIED ORGANOMETALLIC CHEMISTRY, Issue 11 2001
Synthesis of orange to cyan dyes based on donor, acceptor chromogenes using ferrocene as the donor group, conjugated
Abstract A novel series of organometallic donor,conjugated,acceptor dyes derived from ferrocene as the donor group have been synthesized via the Knoevenagel reaction of ferrocene carboxaldehyde and various active methylene compounds to give a range of dyes ranging from orange to blue,green in color. The most bathochromic dye is that derived from dialkyl thiobarbituric acid and the least is that derived from the tetralone. The dyes showed an unusual negative solvatochromism as the solvent polarity increased. All dyes synthesized are expected to have some non-linear optical properties, as evidenced from the pronounced solvatochromism. Copyright ©,2001 John Wiley & Sons, Ltd. [source]

ChemInform Abstract: Indium Modified Mesoporous Zeolite AlMCM-41 as a Heterogeneous Catalyst for the Knoevenagel Condensation Reaction.

CHEMINFORM, Issue 40 2010
Santosh S. Katkar
Abstract The indium-modified mesoporous zeolite AlMCM-41 is used as heterogeneous catalyst for the Knoevenagel reaction of aromatic aldehydes (I) and activated methylene compounds (II). [source]

Synthesis of Ionic Liquid Functionalized SBA-15 Mesoporous Materials as Heterogeneous Catalyst toward Knoevenagel Condensation under Solvent-Free Conditions

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 15 2006
Yong Liu
Abstract 1-Methyl-3-propylimidazolium chloride (MPImCl) and 1-propylpyridinium chloride (PPyCl) ionic liquid functionalized SBA-15 mesoporous materials were synthesized and used as heterogeneous catalysts in Knoevenagel reactions with excellent yields and reusability. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006) [source]