Results 11 to 20 of about 33,029 (246)

Nickel-catalysed retro-hydroamidocarbonylation of aliphatic amides to olefins [PDF]

open access: yesNature Communications, 2017
Converting the normally highly stable amide bond into different functionalities is a challenging task. Here the authors report a nickel-catalysed retro-hydroamidocarbonylation procedure, allowing the conversion of aliphatic amides into alkenes across a ...
Jiefeng Hu   +3 more
doaj   +2 more sources

General and selective ruthenium-catalyzed hydrogenation of primary amides to primary amines under mild conditions [PDF]

open access: yesNature Communications
The catalytic hydrogenation of amides continues to be one of the most difficult reductive transformations in organic synthesis. Despite significant efforts in past decades, there is no general protocol reported allowing the synthesis of various primary ...
Chakreshwara Kuloor   +9 more
doaj   +2 more sources

Biogenic Quorum-Sensing Amides from Streptomyces sp. NP10 [PDF]

open access: yesMolecules
Volatile organic compounds produced by microbes are increasingly recognized as modulators of microbial interactions and mediators of both intra- and inter-kingdom communication.
Marija S. Genčić   +5 more
doaj   +2 more sources

Efficient solvent-free amide synthesis via Ritter reaction catalyzed by a reusable Fe3O4/g-C3N4/ NTMPA nanocomposite [PDF]

open access: yesScientific Reports
Amide formation through the Ritter reaction remains a valuable transformation in pharmaceutical and materials chemistry, yet conventional protocols rely heavily on corrosive homogeneous acids and non-green conditions.
Haniehsadat Karimitabar   +1 more
doaj   +2 more sources

Degradation of epoxy coatings under gamma irradiation [PDF]

open access: yes, 2013
Epoxy networks based on Diglycidyl ether of bisphenol A (DGEBA) and cured with Jeffamines (POPA) or polyamidoamine (PAA) were gamma irradiated at 25 1C in air. Dose rates of 50, 200 or 2000 Gy h- 1 for doses up 100 kGy were used.
DJOUANI, Fatma   +4 more
core   +6 more sources

Catalytic enantioselective reductive alkynylation of amides enables one-pot syntheses of pyrrolidine, piperidine and indolizidine alkaloids

open access: yesNature Communications, 2023
The primary objective in synthetic organic chemistry is to develop highly efficient, selective, and versatile synthetic methodologies, which are essential for discovering new drug candidates and agrochemicals. In this study, we present a unified strategy
Fang-Fang Xu   +3 more
doaj   +1 more source

Chemical and spectroscopic analysis of olive mill waste water during a biological treatment [PDF]

open access: yes, 2007
The treatment of olive mill waste water was studied on the laboratory scale. Physico–chemical analyses showed the final products had a mean pH of 5.4 without neutralisation and 5.7 when lime was added to the process.
Bailly, Jean-René   +5 more
core   +5 more sources

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

Scientific Opinion on Flavouring Group Evaluation 94, Revision 2 (FGE.94Rev2): Consideration of aliphatic amines and amides evaluated in an addendum to the group of aliphatic and aromatic amines and amides evaluated by the JECFA (68th meeting) [PDF]

open access: yesEFSA Journal, 2014
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to consider evaluations of flavouring substances assessed since 2000 by the Joint FAO/WHO Expert Committee on Food Additives
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source

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