10471-28-0Relevant articles and documents
Highly chemoselective, oxyvanadium-catalysed cleavage of α-hydroxy ketones
Kirihara, Masayuki,Takizawa, Shinobu,Momose, Takefumi
, p. 7 - 8 (1998)
α-Hydroxy ketones (α-ketols) can be cleaved chemoselectively with a catalytic amount of dichloroethoxyoxyvanadium under an oxygen atmosphere.
Ni/Co-catalyzed homo-coupling of alkyl tosylates
Komeyama, Kimihiro,Tsunemitsu, Ryusuke,Michiyuki, Takuya,Yoshida, Hiroto,Osaka, Itaru
, (2019/05/02)
A direct reductive homo-coupling of alkyl tosylates has been developed by employing a combination of nickel and nucleophilic cobalt catalysts. A single-electron-transfer-type oxidative addition is a pivotal process in the well-established nickel-catalyzed coupling of alkyl halides. However, the method cannot be applied to the homo-coupling of ubiquitous alkyl tosylates due to the high-lying σ*(C–O) orbital of the tosylates. This paper describes a Ni/Co-catalyzed protocol for the activation of alkyl tosylates on the construction of alkyl dimers under mild conditions.
A new route to α,ω-diamines from hydrogenation of dicarboxylic acids and their derivatives in the presence of amines
Shi, Yiping,Kamer, Paul C. J.,Cole-Hamilton, David J.
supporting information, p. 5460 - 5466 (2017/11/22)
A new and selective route for the synthesis of polymer precursors, primary diamines or N-substituted diamines, from dicarboxylic acids, diesters, diamides and diols using a Ru/triphos catalyst is reported. Excellent conversions and yields are obtained under optimised reaction conditions. The reactions worked very well using 1,4-dioxane as solvent, but the greener solvent, 2-methyl tetrahydrofuran, also gave very similar results. This method provides a potential route to converting waste biomass to value added materials. The reaction is proposed to go through both amide and aldehyde pathways.
One-pot synthesis of cyclophane-type macrocycles using manganese(iii)- mediated oxidative radical cyclization
Ito, Yosuke,Tomiyasu, Yuichi,Kawanabe, Takahiro,Uemura, Keisuke,Ushimizu, Yuu,Nishino, Hiroshi
supporting information; scheme or table, p. 1491 - 1507 (2011/04/23)
Cyclophane-type macrocyclic compounds from 21 to 56 members having two fused dihydrofuran rings were synthesized by the manganese(iii)-mediated oxidation of terminal dienes with bis(3-oxobutanoate)s containing aromatics. The reaction detail, characterization and reaction pathways are described. The Royal Society of Chemistry 2011.
Chain-Substituted Lipids in Monolayer Films. A Study of Molecular Packing
Menger, F. M.,Wood, M. G.,Richardson, S.,Zhou, Q.,Elrington, A. R.,Sherrod, M. J.
, p. 6797 - 6803 (2007/10/02)
A series of highly purified fatty acids and phospholipids, each possessing a chain substituent of varying size (methyl, n-butyl, or phenyl) at varying locations (carbon 4, 8, 12, or 16 of an 18-carbon chain) were synthesized.Pressure-area isotherms, obtained with the aid of a film balance, revealed how these molecules, either individually or admixed, pack in monomolecular films.Two examples will illustrate here the type of information secured by the method. (a) The presence of a methyl at carbon 16 of a single phospholipid chain has a negligible effect on the molecular packing within a "liquid" film.A methyl on carbon 16 of both chains, on the other hand, is highly expansive.Even a single methyl at position 8 perturbs the film packing appreciably, thus indicating less available space near the center of the chain. (b) Deviation from ideality in mixed fatty acid films can be explained by interdigitation that reduces steric repulsion among the substituents.It is also possible to observe by means of film balance techniques the extrusion of 8-butylstearic acid when it contaminates a film composed largely of stearic acid.Approximate SHADOW calculations could, in many cases, provide film areas in reasonable agreement with experiment.
Method of preparing monoesters
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, (2008/06/13)
Monoesters of symmetrical dicarboxylic acids and symmetrical diols are prepared in high yield by reacting a diacid or a diol with a monohydric alcohol or monocarboxylic acid, respectively, in an aqueous solution. The resultant monoester is removed from the aqueous solution immediately after its formation by continuous extraction with a nonpolar solvent.
