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Ketones Catalyzed (ketone + catalyze)

Distribution by Scientific Domains
Chemistry100%
Distribution within Chemistry
Organic Chemistry92%
General & Introductory Chemistry7%

Selected Abstracts

Efficient Propargylation of Aldehydes and Ketones Catalyzed by Titanocene(III)

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 14-15 2009
José Justicia
Abstract We describe a novel method for the propargylation of a wide range of aldehydes and ketones catalyzed by titanocene(III) complexes under mild reaction conditions and compatible with many functional groups. Homopropargylic alcohols are obtained as the sole products even when ketones are used as starting materials, which is unusual in Barbier-type propargylations. [source]

Convenient Enantioselective Hydrosilylation of Ketones Catalyzed by Zinc-Macrocyclic Oligoamine Complexes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 7-8 2009
Jadwiga Gajewy
Abstract Chiral macrocyclic tetra- and hexamine macrocycles derived from trans -1,2-diaminocyclohexane (DACH) in complexes with diethylzinc efficiently catalyze the asymmetric hydrosilylation of aryl alkyl ketones with enantiomeric excess of the product up to 89%. The cyclic structure of the trianglamine ligand increases the enantioselectivity of the reaction, in comparison to the catalysis with the acyclic N,N, -dibenzyl-DACH ligand. Density functional theory (DFT) computations on the structures of ligand-zinc complexes and on the structures of these complexes with a coordinated acetophenone molecule allow us to rationalize the direction of the asymmetric induction of the hydrosilylation reaction as well as the superiority of the cyclic ligand compared to the acyclic one. This is the first example of asymmetric catalysis for the hydrosilylation reaction of ketones with the use of a readily available, inexpensive, and reusable macrocyclic trianglamine ligand. [source]

Highly Efficient Cyanosilylation of Sterically Bulky Ketones Catalyzed by Tin Ion-Exchanged Montmorillonite

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4 2009
Jiacheng Wang
Abstract Tin ion-exchanged montmorillonite (Sn-Mont) was found to be a powerful catalyst for the cyanosilylation of aromatic and aliphatic ketones having a carbonyl group in sterically congested circumstances with cyanotrimethylsilane, giving the corresponding cyanohydrin trimethylsilyl ethers in excellent yields. [source]

Enantioselective Reduction of Diaryl Ketones Catalyzed by a Carbonyl Reductase from Sporobolomyces salmonicolor and its Mutant Enzymes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4 2009
Hongmei Li
Abstract The carbonyl reductase from red yeast Sporobolomyces salmonicolor AKU4429 (SSCR) and its mutant enzymes effectively catalyzed the enantioselective reduction of diaryl ketones to give the corresponding chiral alcohols. Both conversion and enantioselectivity were dependent on the co-solvent in the reaction medium. Diaryl ketones with a para -substituent on one of the phenyl groups were reduced with high enantioselectivity (up to 99% ee), which is difficult to achieve using chemical methods such as chiral borane reduction, asymmetric hydrogenation or hydrosilylation. Mutation of SSCR at Q245 resulted in a higher amount of (S)-enantiomer in the products, and in the case of mutant Q245P with para -substituted diaryl ketones as substrate, this effect was so remarkable that the reduction enantiopreference was switched from (R) to (S). The present study provides valuable information about the catalytic properties of the carbonyl reductase SSCR toward the reduction of diaryl ketones, serving as basis for further engineering of this enzyme to develop efficient biocatalysts for highly enantiospecific reduction of diaryl ketones without high electronic dissymmetry or an ortho -substituent on one of the aryl groups. [source]

Enantioselective Cyanosilylation of Ketones Catalyzed by a Nitrogen-Containing Bifunctional Catalyst

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4-5 2006
Yan Xiong
Abstract An efficient and optically active, bifunctional tetraaza ligand (2S)- N -{(1R,2R)-2-[(S)-pyrrolidine-2-carboxamido]-1,2-diphenylethyl}pyrrolidine-2-carboxamide has been developed for the addition of trimethylsilyl cyanide (TMSCN) to ketones. The bifunctional catalyst system based on a monometallic titanium complex was found to be a highly enantioselective catalyst to provide O -TMS cyanohydrins with up to 94% ee. A possible transition state has been proposed to explain the origin of the activation and asymmetric inductivity. [source]

The Mechanism and an Improved Asymmetric Allylboration of Ketones Catalyzed by Chiral Biphenols,

ANGEWANDTE CHEMIE, Issue 46 2009
David
Eine Studie zum Mechanismus der enantioselektiven Titelreaktion (siehe Schema) zeigte, dass ein entscheidender Ligandenaustausch unter Freisetzung von Isopropylalkohol stattfindet, und es stellte sich heraus, dass der Zusatz von iPrOH die Gesamtgeschwindigkeit und die Enantioselektivität steigerte. Eine verbesserte Variante mit Allyldioxaborinan, 1 und tBuOH ergab die Produkte mit höheren Ausbeuten und Enantioselektivitäten. [source]

ChemInform Abstract: Enantioselective Addition of Organozinc Reagents to Ketones Catalyzed by Grafted Isoborneolsulfonamide Polymers and Titanium Isopropoxide.

CHEMINFORM, Issue 32 2009
Vicente J. Forrat
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: A Facile Procedure for Acetalization of Aldehydes and Ketones Catalyzed by Cerium(III) Trifluoromethanesulfonate.

CHEMINFORM, Issue 23 2009
Fumiaki Ono
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Hydrogenation of Hindered Ketones Catalyzed by a Silica-Supported Compact Phosphine,Rh System.

CHEMINFORM, Issue 10 2009
Soichiro Kawamorita
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Aerobic Selective Oxidation of Alcohols to Aldehydes or Ketones Catalyzed by Ionic Liquid Immobilized TEMPO under Solvent-Free Conditions.

CHEMINFORM, Issue 43 2008
Lin Liu
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Direct Asymmetric ,-Amination of Cyclic Ketones Catalyzed by Siloxyproline.

CHEMINFORM, Issue 24 2008
Yujiro Hayashi
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Highly Regio-, Diastereo-, and Enantioselective [2 + 2 + 2] Cycloaddition of 1,6-Enynes with Electron-Deficient Ketones Catalyzed by a Cationic Rh(I)/H8 -binap Complex.

CHEMINFORM, Issue 24 2008
Ken Tanaka
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Enantioselective Hydrogenation of Aromatic Ketones Catalyzed by Ru Complex Using a New Bipyridyl Diphosphine.

CHEMINFORM, Issue 23 2008
Li Chen
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Asymmetric Hydrogenation of Aromatic Ketones Catalyzed by Achiral Monophosphine TPPTS-Stabilized Ru in Ionic Liquids.

CHEMINFORM, Issue 2 2008
Jinbo Wang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Enantioselective Allylation of Ketones Catalyzed by N,N,-Dioxide and Indium(III) Complex.

CHEMINFORM, Issue 49 2007
Xin Zhang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Enantioselective Cyanosilylation of ,,,-Dialkoxy Ketones Catalyzed by Proline-Derived in situ Prepared N-Oxide as Bifunctional Organocatalyst.

CHEMINFORM, Issue 32 2007
Bo Qin
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Asymmetric Hydrogenation of ,-Chloro Aromatic Ketones Catalyzed by ,6 -Arene/TsDPEN,Ruthenium(II) Complexes.

CHEMINFORM, Issue 20 2007
Takeshi Ohkuma
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Enantioselective Enzymatic Reductions of Sterically Bulky Aryl Alkyl Ketones Catalyzed by a NADPH-Dependent Carbonyl Reductase.

CHEMINFORM, Issue 16 2007
Dunming Zhu
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Direct ,-Hydroxylation of Ketones Catalyzed by Organic,Inorganic Hybrid Polymer.

CHEMINFORM, Issue 9 2007
Takayoshi Arai
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Enantioselective Cyanosilylation of Ketones Catalyzed by Mn(salen)/Ph3PO.

CHEMINFORM, Issue 44 2006
Sung Soo Kim
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Selective Diethylzinc Reduction of Imines in the Presence of Ketones Catalyzed by Ni(acac)2.

CHEMINFORM, Issue 20 2006
Xue Xiao
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Asymmetric Addition of Trimethylsilyl Cyanide to Ketones Catalyzed by Al(salen)/triphenylphosphine Oxide.

CHEMINFORM, Issue 17 2006
Sung Soo Kim
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Aldol Condensations of Aldehydes and Ketones Catalyzed by Rare Earth(III) Perfluorooctane Sulfonates in Fluorous Solvents.

CHEMINFORM, Issue 15 2006
Wen-Bin Yi
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Cyanosilylation of Prochiral Ketones Catalyzed by Lanthanide Complexes.

CHEMINFORM, Issue 9 2006
Luo Mei
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Asymmetric Epoxidation of ,,,-Unsaturated Ketones Catalyzed by Silica-Grafted Poly-(L)-leucine Catalysts.

CHEMINFORM, Issue 50 2005
Hua Yi
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Highly Enantioselective Conjugate Additions to ,,,-Unsaturated Ketones Catalyzed by a (Salen)Al Complex.

CHEMINFORM, Issue 22 2005
Mark S. Taylor
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Highly Enantioselective Conjugate Additions to ,,,-Unsaturated Ketones Catalyzed by a (Salen)Al Complex.

CHEMINFORM, Issue 22 2005
Mark S. Taylor
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Highly Enantioselective Phenylacetylene Additions to Ketones Catalyzed by (S)-BINOL,Ti Complex.

CHEMINFORM, Issue 9 2005
Yifeng Zhou
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Asymmetric Transfer Hydrogenation of Aromatic Ketones Catalyzed by the Iridium Hydride Complex under Ambient Conditions.

CHEMINFORM, Issue 8 2005
Jian-shan Chen
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Asymmetric Hydrogenation of Ketones Catalyzed by RuII -bicp Complexes.

CHEMINFORM, Issue 36 2004
Daniel G. Genov
Abstract For Abstract see ChemInform Abstract in Full Text. [source]