Results 231 to 240 of about 14,155 (281)

Synthesis of Spiro Carbocycles via Methyl β-C(sp³)-H Functionalization of Cyclic Aliphatic Acids. [PDF]

J Am Chem Soc
Sheng T, Zhao Z, Lu Y, Chekshin N, Yu JQ.   +4 more
europepmc   +1 more source

Acid Versus Amide-Facts and Fallacies: A Case Study in Glycomimetic Ligand Design. [PDF]

Molecules
Smieško M, Jakob RP, Mühlethaler T, Preston RC, Maier T, Ernst B.   +5 more
europepmc   +1 more source

Design, synthesis and biological evaluation of tacrine-sulphonamide hybrids as a potent acetylcholinesterase inhibitor. [PDF]

RSC Adv
Reddy MM, Reddy EK, J A, Dev RR, Kadambari VSN, Anwar S.   +5 more
europepmc   +1 more source

Influence of management practices on soil organic matter composition evaluated by complementary analytical techniques: XANES and mass spectrometry.

Soil Tillage Res
Leinweber PK, Rahim R, Hewelke E, Regier T, Weber J.   +4 more
europepmc   +1 more source

The basicities of aliphatic amides

Australian Journal of Chemistry, 1983
We report pKa values in aqueous solution at 298 K of the protonated forms of several aliphatic amides, viz., acetamide (pKa = -0.62 ± 0.07), N -methylacetamide (-0.42 ± 0.03), N,N -dimethyl-acetamide (-0.28 ± 0.03), N,N -dimethylformamide (-1.2 + 0.5), urea (0.053 ± 0.002) and thiourea (-0.9 ± :O.l).
HM Grant, P Mctigue, DG Ward
openaire   +2 more sources

Thermodynamics of protonation and hydration of aliphatic amides

Journal of the Chemical Society, Perkin Transactions 2, 1993
The protonation equilibria of a series of aliphatic amides of the type R–CO–NH2, R–CO–NHCH3 and R–CO–N(CH3)2(R = H, Me. Et, Pri, But) have been studied in aqueous H2SO4 in the temperature range 25–60 °C, thus determining the protonation (m* and pK) and the thermodynamic parameters of the ionization equilibrium (ΔG°, ΔH°, ΔS°).
BAGNO, ALESSANDRO, LOVATO G., SCORRANO, GIANFRANCO   +2 more
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Selective α‐Oxyamination and Hydroxylation of Aliphatic Amides

Angewandte Chemie, 2017
AbstractCompared to the α‐functionalization of aldehydes, ketones, even esters, the direct α‐modification of amides is still a challenge because of the low acidity of α‐CH groups. The α‐functionalization of N−H (primary and secondary) amides, containing both an unactived α‐C−H bond and a competitively active N−H bond, remains elusive.
Xinwei Li, Fengguirong Lin, Kaimeng Huang, Jialiang Wei, Xinyao Li, Xiaoyang Wang, Xiaoyu Geng, Ning Jiao   +7 more
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Aliphatic acid amides of the fruits of Zanthoxylum piperitum

Phytochemistry, 2004
Six aliphatic acid amides (1-6) were isolated from the pericarp of Zanthoxylum piperitum fruits. MS and NMR spectroscopic investigation revealed that these compounds have a ketone and/or hydroxyl group(s) in the unsaturated aliphatic acid moiety of the structure of the amides.
Tsutomu, Hatano, Kazutoshi, Inada, Tomo-Omi, Ogawa, Hideyuki, Ito, Takashi, Yoshida   +4 more
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A case study on the myth of emission from aliphatic amides

Methods and Applications in Fluorescence, 2016
For several decades, aliphatic amidic compounds have been believed to be emissive. We report that this contention is incorrect and that the anomalous emission from amides originates in fluorescent impurities generated during their synthesis. In order to make this point, we have synthesized fluorescent compounds and have compared the absorption spectra ...
SINGH, AK, DAS, S, DATTA, A
openaire   +4 more sources