Results 21 to 30 of about 133,532 (244)

An efficient method for the construction of polysubstituted 4-pyridones via self-condensation of β-keto amides mediated by P2O5 and catalyzed by zinc bromide

open access: yesBeilstein Journal of Organic Chemistry, 2013
A self-condensation cyclization reaction mediated by phosphorus pentoxide (P2O5) and catalyzed by zinc bromide (ZnBr2) is presented for the synthesis of polysubstituted 4-pyridones and 2-pyridones from β-keto amides.
Liquan Tan   +3 more
doaj   +1 more source

AMIDES ISOLATED FROM THE LEAVES OF Piper tuberculatum Jacq. (Piperaceae) WITH ACETYLCHOLINESTERASE INHIBITION AND LARVICIDAL ACTIVITY AGAINST Aedes aegypti [PDF]

open access: yesQuímica Nova
Piper tuberculatum Jacq. is known to be a promising source of amides, which have shown remarkable biological activities. In this study, a phytochemical investigation of the leaves of P.
Brenda R. C. Leocadio   +10 more
doaj   +1 more source

The Mode of Protonation of Amides [PDF]

open access: yes, 1958
The relative basicities of oxygen versus nitrogen in amides is a problem which has not been satisfactorily resolved. However, it might be anticipated from considerations of resonance and structural parameters that in strongly acidic solutions the proton ...
Fraenkel, Gideon, Niemann, Carl
core   +1 more source

One-Pot Synthesis of Single-Source Precursors for Nanocrystalline LED Phosphors M2Si5N8:Eu2+ (M = Sr, Ba) [PDF]

open access: yes, 2009
Highly efficient red-emitting nitridosilicate phosphors Sr2Si5N8:Eu2+ and Ba1.5Sr0.5Si5N8:Eu2+ (doping level 1%) applicable to phosphor converted pc-LEDs were synthesized in nanocrystalline form at low temperatures employing a novel single-source ...
Schmidt, Peter J.   +2 more
core   +1 more source

Fully Chlorinated N-Silyl Amides of Titanium and Tungsten [PDF]

open access: yes, 1997
The reaction of hexachlorodisilazanyllithium (Cl3Si)2NLi (1), with TiCl4 leads selectively to the novel fully chlorinated amides (Cl3Si)2NTiCl3 (2) or [(Cl3Si)2N]2 TiCl2 (3), respectively, depending on the molar ratio of the starting materials.
Milius, Wolfgang   +2 more
core   +1 more source

Targeted Derepression of the Human Immunodeficiency Virus Type 1 Long Terminal Repeat by Pyrrole-Imidazole Polyamides [PDF]

open access: yes, 2002
The host factor LSF represses the human immunodeficiency virus type 1 long terminal repeat (LTR) by mediating recruitment of histone deacetylase. We show that pyrrole-imidazole polyamides targeted to the LTR can specifically block LSF binding both in ...
Coull, Jason J.   +5 more
core   +1 more source

KNH2 - KH: a metal amide - hydride solid solution [PDF]

open access: yes, 2016
We report for the first time the formation of a metal amide-hydride solid solution. The dissolution of KH into KNH2 leads to an anionic substitution, which decreases the interaction among NH2 - ions.
Baricco, Marcello   +15 more
core   +4 more sources

Preparation, Characterization and Evaluation of Some New Amides as Antimicrobial Agents

open access: yesHittite Journal of Science and Engineering, 2020
The some new amide derivatives 1(a-c) and, 2d were synthesized by the two-step N-acylation of 4-nitroaniline or heterocyclic amine derivatives with acyl chlorides.
Aysel Veysioğlu, Şükriye Çakmak
doaj   +1 more source

Alkylation of N-substituted-2-phenylacetamides [PDF]

open access: yesJournal of the Serbian Chemical Society, 2004
Various N-substituted phenylacetamides were alkylated using different alkylating agents under neutral and basic conditions. Reactions were performed at different reaction temperatures and in various solvents. Also, a number of various catalysts were used
Mijin Dušan Ž.   +2 more
doaj   +1 more source

Reactions of (-)-sparteine with alkali metal HMDS complexes : conventional meets the unconventional [PDF]

open access: yes, 2009
Conventional (-)-sparteine adducts of lithium and sodium 1,1,1,3,3,3-hexamethyldisilazide (HMDS) were prepared and characterised, along with an unexpected and unconventional hydroxyl-incorporated sodium sodiate, [(-)-sparteine·Na(-HMDS)Na·(-)-sparteine]+[
Alan R. Kennedy   +27 more
core   +1 more source

Home - About - Disclaimer - Privacy