Search Within


Applied Filters:
Showing 1-12 of 12 results for "418218" within Papers
Giovanni Desimoni et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 14(12), 3630-3636 (2008-02-29)
The asymmetric Friedel-Crafts reaction between a series of substituted indoles 2 a-l and methyl (E)-2-oxo-4-aryl-3-butenoates 3 a-c has been efficiently catalyzed by the scandium(III) triflate complex of (4'S,5'S)-2,6-bis[4'-(triisopropylsilyl)oxymethyl-5'-phenyl-1',3'-oxazolin-2'-yl]pyridine (pybox; 1). Substituted 4-(indol-3-yl)-2-oxo-4-arylbutyric acid methyl esters 4 a-n were usually formed
Cholho Choe et al.
Dalton transactions (Cambridge, England : 2003), 44(19), 9182-9192 (2015-04-24)
Redox-inactive metal ions can modulate the reactivity of redox-active metal ions in a variety of biological and chemical oxidations. Many synthetic models have been developed to help address the elusive roles of these redox-inactive metal ions. Using a non-heme manganese(II)
Mild reductive opening of aryl pyranosides promoted by scandium(III) triflate.
Hua-Li Qin et al.
Journal of the American Chemical Society, 129(1), 38-39 (2007-01-04)
Jens Oelerich et al.
Organic & biomolecular chemistry, 13(9), 2793-2799 (2015-01-22)
Alkylidene malonates and α,β-unsaturated α'-hydroxyketones are demonstrated to be efficient classes of electrophiles for the scandium(III) triflate/sodium dodecyl sulphate (SDS) catalysed vinylogous Friedel-Crafts alkylation of indoles and pyrroles in water. These substrates contain an easily removable auxiliary group that increases
Kobayashi, S.
Lewis Acids in Organic Synthesis, 2, 883-883 (2000)
Samikannu Ramesh et al.
Acta chimica Slovenica, 60(3), 689-694 (2013-10-31)
A novel and practical method has been developed for the synthesis of β-cyanoketones using tetraethylammonium cyanide (Et4NCN, TEACN) / Sc(III) triflate and chalcones without the liberation of toxic HCN gas. Availability, safety, easy handling of the reagents, mild conditions of
Okamoto, Y., et al.
Macromolecular Symposia, 183, 83-83 (2002)
Alex R Lippert et al.
Journal of the American Chemical Society, 128(46), 14738-14739 (2006-11-16)
Oligosubstituted bullvalones were synthesized in eight steps from 2,6-cycloheptadienone via a unique Lewis acid catalyzed intramolecular cyclopropanation of a stabilized sulfur ylide, leading directly to the tetracyclic cage structure. Upon exposure to base, the substituted bullvalones tautomerized to a hydroxybullvalene
Saya Kakuda et al.
Journal of the American Chemical Society, 137(9), 3330-3337 (2015-02-11)
Mononuclear copper complexes, [(tmpa)Cu(II)(CH3CN)](ClO4)2 (1, tmpa = tris(2-pyridylmethyl)amine) and [(BzQ)Cu(II)(H2O)2](ClO4)2 (2, BzQ = bis(2-quinolinylmethyl)benzylamine)], act as efficient catalysts for the selective two-electron reduction of O2 by ferrocene derivatives in the presence of scandium triflate (Sc(OTf)3) in acetone, whereas 1 catalyzes
Alec Lutzke et al.
Nitric oxide : biology and chemistry, 84, 16-21 (2019-01-11)
S-Nitrosothiols (RSNOs) such as S-nitrosoglutathione (GSNO) are known to produce nitric oxide (NO) through thermal, photolytic, and metal ion-promoted pathways, which has led to their increasing use as exogenous sources of therapeutic NO. Despite the burgeoning NO release applications for
Kazuaki Ishihara et al.
The Journal of organic chemistry, 61(14), 4560-4567 (1996-07-12)
Scandium trifluoromethanesulfonate (triflate), which is commercially available, is a practical and useful Lewis acid catalyst for acylation of alcohols with acid anhydrides or the esterification of alcohols by carboxylic acids in the presence of p-nitrobenzoic anhydrides. The remarkably high catalytic
Krzysztof Kuciński et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(13), 4940-4943 (2015-02-18)
The first use of a Lewis acid catalyst in the addition reaction of both aromatic and aliphatic thiols to unsaturated organosilicon compounds is reported. In catalytic tests, scandium(III) triflate demonstrates high catalytic activity in this process. Under mild conditions (25 °C
Page 1 of 1