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Stereocontrolled Synthesis (Stereocontroll + synthesis)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Asymmetric Total Synthesis of Solandelactone,E: Stereocontrolled Synthesis of the 2-ene-1,4-diol Core through a Lithiation,Borylation,Allylation Sequence,

ANGEWANDTE CHEMIE, Issue 37 2010
Anna Robinson
Hoch stereoselektiv und in 13 Stufen gelangt man zu Solandelacton,E. Die beschriebene Synthese nutzt eine Sequenz aus Lithiierung, Borylierung und Allylierung als Schlüsselschritt (siehe Schema). Auf diesem Weg wird auch das Problem einer schlechten Stereoselektivität an C11 gelöst, das viele frühere Synthesen dieser Verbindungsklasse einschränkte. [source]

Innentitelbild: Stereocontrolled Synthesis of Carbon Chains Bearing Contiguous Methyl Groups by Iterative Boronic Ester Homologations: Application to the Total Synthesis of (+)-Faranal (Angew. Chem.

ANGEWANDTE CHEMIE, Issue 34 2009
34/2009)
In einem neuen Syntheseansatz werden Gruppen sukzessive an einen Boronsäureester addiert , ein Verfahren, das an ein molekulares Fließband erinnert. V.,K. Aggarwal et,al. demonstrieren dieses Homologisierungskonzept in ihrer Zuschrift auf S.,6435,ff. anhand der stereoselektiven Synthese von (+)-Faranal. [source]

ChemInform Abstract: Highly Stereocontrolled Synthesis of Fluorinated 2,6-trans Dihydropyrans via Prins Cyclization.

CHEMINFORM, Issue 21 2010
Hai-Qing Luo
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of Enantiopure Polyhydroxylated Azetidines via 1,2-Oxazines.

CHEMINFORM, Issue 17 2010
Vjekoslav Dekaris
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of Oxaspirobicycles via Prins-Pinacol Annulation.

CHEMINFORM, Issue 4 2010
Satish N. Chavre
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of Spirooxindoles Through Lewis Acid-Promoted [5 + 2]-Annulation of Chiral Silyl Alcohols.

CHEMINFORM, Issue 48 2009
Yun 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 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: Gold-Catalyzed Stereocontrolled Synthesis of 2,3-Bis(acetoxy)-1,3-dienes.

CHEMINFORM, Issue 41 2009
Xiaogen Huang
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: Oxidative Rearrangement of 2-Alkoxy-3,4-dihydro-2H-pyrans: Stereocontrolled Synthesis of 4,5-cis-Disubstituted Tetrahydrofuranones Including Whisky and Cognac Lactones and Crobarbatic Acid.

CHEMINFORM, Issue 39 2009
Alan Armstrong
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: Stereocontrolled Synthesis of ,-Amino Alcohols from Lithiated Aziridines and Boronic Esters.

CHEMINFORM, Issue 22 2009
Frank Schmidt
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: Homologation of Boronic Esters with Lithiated Epoxides for the Stereocontrolled Synthesis of 1,2- and 1,3-Diols and 1,2,4-Triols.

CHEMINFORM, Issue 20 2009
Emeline Vedrenne
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]

A Simple Stereocontrolled Synthesis of Salinosporamide A.

CHEMINFORM, Issue 39 2004
Leleti Rajender Reddy
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Dichloroketene,Chiral Olefin-Based Approach to Pyrrolizidines: Highly Stereocontrolled Synthesis of (+)-Amphorogynine A (VIII).

CHEMINFORM, Issue 36 2003
Caroline Roche
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Novel Iminium Ion Equivalents Prepared Through C,H Oxidation for the Stereocontrolled Synthesis of Functionalized Propargylic Amine Derivatives.

CHEMINFORM, Issue 23 2003
James J. Fleming
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

ChemInform Abstract: Stereocontrolled Synthesis of 1,2-Dialkyl-4-halopyrrolidines Through PhSeX-Induced Cyclization of Secondary Homoallylamines.

CHEMINFORM, Issue 30 2002
Francis Outurquin
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of the Enantiomers of 1-[2-Hydroxy-3-(4-phenyl-1-piperazinyl)-propyl]-pyrrolidin-2-one.

CHEMINFORM, Issue 12 2002
Katarzyna Kulig
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of Trifluoromethylated (E)- or (Z)-Ynenyl Sulfones via Sequential Transformations.

CHEMINFORM, Issue 32 2001
Yanchang Shen
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of Carbon,Carbon Double Bond Locked Analogues of Strobilurins Which Are Characterized by a trans-1,2-Disubstituted Cyclopropane Ring.

CHEMINFORM, Issue 31 2001
Renzo Rossi
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 New and Facile Stereocontrolled Synthesis of Conjugated Dienyl Trifluoromethyl Ketones.

CHEMINFORM, Issue 18 2001
Jingbo Xiao
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereocontrolled Synthesis of Fluorinated (E)- or (Z)-Allylic Phosphonates.

CHEMINFORM, Issue 3 2001
Yanchang Shen
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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]

Asymmetric Sulfonium Ylide Mediated Cyclopropanation: Stereocontrolled Synthesis of (+)-LY354740

CHEMISTRY - A EUROPEAN JOURNAL, Issue 2 2006
Varinder K. Aggarwal Prof.
Abstract The reaction of ester-stabilized sulfonium ylides with cyclopentenone to give (+)- 5 ((1S,5R,6S)-ethyl 2-oxobicyclo[3.1.0]hexane-6-carboxylate), an important precursor to the pharmacologically important compound (+)-LY354740, has been studied using chiral sulfides operating in both catalytic (sulfide, Cu(acac)2, ethyl diazoacetate, 60,°C) and stoichiometric modes (sulfonium salt, base, room temperature). It was found that the reaction conditions employed had a major influence over both diastereo- and enantioselectivity. Under catalytic conditions, good enantioselectivity with low diastereoselectivity was observed, but under stoichiometric conditions low enantioselectivity with high diastereoselectivity was observed. When the stoichiometric reactions were conducted at high dilution, diastereoselectivity was reduced. This indicated that base-mediated betaine equilibration was occurring (which is slow relative to ring closure at high dilution). Based on this model, conditions for achieving high enantioselectivity were established as follows: use of a preformed ylide, absence of base, hindered ester (to reduce ylide-mediated betaine equilibration), and low concentration. Under these conditions high enantioselectivity (95,% ee) was achieved, albeit with low diastereocontrol. Our model for selectivity has been applied to other sulfonium ylide mediated cyclopropanation reactions and successfully accounts for the diastereoselectivity observed in all such reported reactions to date. [source]