Results 41 to 50 of about 352,111 (240)

Experimental and modeling study of the low-temperature oxidation of large alkanes [PDF]

open access: yes, 2008
This paper presents an experimental and modeling study of the oxidation of large linear akanes (from C10) representative from diesel fuel from low to intermediate temperature (550-1100 K) including the negative temperature coefficient (NTC) zone.
Battin-Leclerc, Frédérique   +4 more
core   +3 more sources

Ketones from Nickel-Catalyzed Decarboxylative, Non-Symmetric Cross-Electrophile Coupling of Carboxylic Acid Esters.

open access: yesAngewandte Chemie, 2019
Synthesis of the C-C bonds of ketones relies upon one high-availability reagent (carboxylic acids) and one of low availability reagent (organometallic reagents or alkyl iodides).
Jiang Wang   +4 more
semanticscholar   +1 more source

Influence of temperature, UV-light wavelength and intensity on polypropylene photothermal oxidation [PDF]

open access: yes, 2014
A criterion based on the energy absorbed by photosensitive species was proposed to describe the contribution of UV-light to the initiation of the polypropylene photothermal oxidation whatever the light source. The calculation of this energy was performed
COLIN, Xavier   +3 more
core   +4 more sources

Mechanically induced oxidation of alcohols to aldehydes and ketones in ambient air: Revisiting TEMPO-assisted oxidations

open access: yesBeilstein Journal of Organic Chemistry, 2017
The present work addresses the development of an eco-friendly and cost-efficient protocol for the oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones by mechanical processing under air. Ball milling was shown to promote
Andrea Porcheddu   +4 more
doaj   +1 more source

Highly substituted benzannulated cyclooctanol derivatives by samarium diiodide-induced cyclizations

open access: yesBeilstein Journal of Organic Chemistry, 2010
A series of γ-oxo esters suitably substituted with various styrene subunits was subjected to samarium diiodide-induced 8-endo-trig cyclizations. Efficacy, regioselectivity and stereoselectivity of these reactions via samarium ketyls strongly depend on ...
Jakub Saadi   +2 more
doaj   +1 more source

Naturally occurring long-chain β-hydroxyketones

open access: yesJournal of Lipid Research, 1971
A fraction comprising about 0.7% of the extractable surface lipids of cabbage (Brassica oleracea) leaves was isolated and identified as a mixture of isomeric βhydroxyketones consisting mainly of 14-keto-16-hydroxynonacosane and 15-keto-13 ...
HARALD H.O. SCHMID, PATRICIA C. BANDI
doaj   +1 more source

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

Manganese-Catalyzed α-Alkylation of Ketones, Esters, and Amides Using Alcohols

open access: yesACS Catalysis, 2018
Herein we report the manganese-catalyzed C–C bond-forming reactions via α-alkylation of ketones, amides, and esters, using primary alcohols. β-Alkylation of secondary alcohols by primary alcohols to obtain α-alkylated ketones is also reported.
S. Chakraborty   +3 more
semanticscholar   +1 more source

Simple synthesis of pyrrolo[3,2-e]indole-1-carbonitriles

open access: yesBeilstein Journal of Organic Chemistry, 2013
Alkylation of 5-nitroindol-4-ylacetonitriles with ethyl chloroacetate, α-halomethyl ketones, and chloroacetonitrile followed by a treatment of the products with chlorotrimethylsilane in the presence of DBU gives 1-cyanopyrrolo[3,2-e]indoles substituted ...
Adam Trawczyński   +3 more
doaj   +1 more source

Polyenamines from aromatic diacetylenic diketones and diamines [PDF]

open access: yes, 1987
The synthesis and characterization of several polyenamine ketones are discussed wherein conjugated diacetylenic diketones and aromatic diamines are used as a route to the formation of high molecular weight polyenamine ketones which exhibit good ...
Bass, Robert G.   +3 more
core   +1 more source

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