An efficient synthesis of cycloalkane-1,3-dione-2-spirocyclopropanes from 1,3-cycloalkanediones using (1-aryl-2-bromoethyl)dimethylsulfonium bromides: application to a one-pot synthesis of tetrahydroindol-4(5H)-one [PDF]
, 2015 An efficient synthesis of cyclohexane- and cyclopentane-1,3-dione-2-spirocyclopropanes from 1,3-cycloalkanediones using sulfonium salts was achieved. The reaction of 1,3-cycloalkanediones with (1-aryl-2-bromoethyl)dimethylsulfonium bromides and powdered ...
Fukumoto Masahiro +4 more
core +2 more sources
Enantioselective Total Synthesis of (+)-Salvileucalin B [PDF]
, 2011 An enantioselective total synthesis of the diterpenoid natural product (+)-salvileucalin B is reported. Key findings include a copper-catalyzed arene cyclopropanation reaction to provide the unusual norcaradiene core and a reversible retro ...
Levin, Sergiy +2 more
core +1 more source
Palladium(II) carboxylates and palladium(I) carbonyl carboxylate complexes as catalysts for olefin cyclopropanation with ethyl diazoacetate [PDF]
, 2009 Palladium(I) carbonyl carboxylate complexes [Pd(μ-CO)(μ-RCO2)]n (R = Me, n = 4; R = CMe3, n = 6) and the corresponding palladium(II) carboxylates (acetate and pivalate) catalyze the cyclopropanation of olefins with ethyl diazoacetate.
Cartes Domínguez, María Ángeles +5 more
core +1 more source
Angewandte Chemie International Edition, Accepted Article.Cyclopropanes, especially those substituted with trifluoromethyl (CF3) groups, are valuable scaffolds in medicinal chemistry. Their enhanced bioavailability contributes to the widespread presence of this motif in a variety of bioactive compounds. Despite the development of multiple synthetic strategies, a direct method for transferring CF3‐containing ...
Rahul Giri +5 more
wiley +1 more source
Hydrogenative Cyclopropanation and Hydrogenative Metathesis
, 2019 The unusual geminal hydrogenation of a propargyl alcohol derivative with [CpXRuCl] as the catalyst entails formation of pianostool ruthenium carbenes in the first place; these reactive intermediates can be intercepted with tethered alkenes to give either
Biberger, T. +3 more
core +1 more source
Diazo Compounds and Phenyliodonium Ylides in Inter- and Intramolecular Cyclopropanations Catalyzed by Dirhodium(II). Synthesis and Chiral Resolution by GC versus HPLC [PDF]
, 2018 Summary.: The dirhodium(II)-catalyzed intermolecular cyclopropanation of a set of olefins with either diazo free phenyliodonium ylides or diazo compounds afforded cyclopropanes derived from Meldrum's acid, dimethyl malonate, (silanoxyvinyl)diazoacetates,
Aboul-Enein, Hassan Y. +3 more
core
Investigation of the structure and catalytic activity in olefin cyclopropanation of neutral and cationic dicopper complexes of 3,5-bis(pyridinylimino)benzoic acid. [PDF]
, 2012 Three neutral and one cationic copper(I) complexes with 3,5-bis(pyridinylimino)benzoic acid are synthesized and characterized in solution and in the solid state by a variety of spectroscopic techniques and X-ray crystallography.
Akrivos, P. +5 more
core +1 more source
Nature Communications, 2018 Synthesis of cyclopropanes bearing vicinal all-carbon quaternary stereocenters poses synthetic challenges. Here, the authors report an intramolecular radical cyclopropanation with a copper/amine cooperative catalytic system for the efficient construction
Liu Ye +5 more
doaj +1 more source
Enantioselective Gas Chromatographic Analysis of Cyclopropane Derivatives [PDF]
, 2018 Chirasil-β-Dex was used as chiral stationary phase for the enantioselective gas chromatographic analysis of several new chiral cyclopropane derivatives.
Aboul-Enein, H. Y. +5 more
core
Journal of the American Oil Chemists' Society, EarlyView.ABSTRACT Fatty acid analysis is required in a wide range of industries, and conversion to fatty acid methyl esters followed by gas chromatography is by far the most common method of analysis. However, despite widespread use, there is no consensus on which derivatization method should be used or how the methods compare.
Tharani T. Dissanayake +5 more
wiley +1 more source