Results 21 to 30 of about 62,486 (246)
Synthesis of α-Heterosubstituted Ketones Through Sulfur Mediated Difunctionalization of Internal Alkynes [PDF]
, 2019 Synthesis of α-heterosubstituted ketones was achieved through sulfur mediated difunctionalization of internal alkynes in one-pot. The reaction design involves: phenyl substituted internal alkyne attacking the triflic anhydride activated diphenyl ...
Hongguang, Du +3 more
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Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry
Molecules, 2019 The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic ...
Igor V. Alabugin +4 more
doaj +1 more source
Occupational exposure to ketones [PDF]
"Recommended standards and criteria to prevent hazardous workplace exposure to ketones are presented. Information on the biological effects of ketones is included along with data on environmental sampling, analysis, and control.
core +1 more source
Generating structural diversity in \(\alpha\)[alpha],\(\alpha\)[alpha]-difluoromethyl ketones [PDF]
, 2003 This thesis describes attempts to use palladium-catalysed cross-coupling methodology in the synthesis of \(\alpha\),\(\alpha\)-difluoroketones contained within a diverse array of molecular motifs.
Fullbrook, Jeremy Jon
core +7 more sources
Beilstein 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
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, 2021 Catalytic oxidative functionalization of alkynes has emerged as an effective method in synthetic chemistry in recent decades. However, enantioselective transformations via metal carbene intermediates are quite rare due to the lack of robust chiral ...
Wenhao Hu +11 more
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Highly substituted benzannulated cyclooctanol derivatives by samarium diiodide-induced cyclizations
Beilstein 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
Journal 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
e-Polymers, 2007 Abstract Poly(oxy-1,4-phenylene carbonyl-1,4-phenylene oxy-1,4-phenylene carbonyl-2,6-naphthalene carbonyl-1,4-phenylene) or 2,6-PEKEKNK is a polymer of the poly(aryl ether ketone) family differing from PEKEKK by the presence of a naphthyl group linked at positions 2 and 6 to the two ketone groups.
Dosière, Marcel +3 more
openaire +1 more source
Simple synthesis of pyrrolo[3,2-e]indole-1-carbonitriles
Beilstein 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