Results 241 to 250 of about 14,677 (287)
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Creation of quaternary stereocenters in carbonyl allylation reactions
Chem. Commun., 2007AbstractChemInform 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.
Ilan, Marek, Genia, Sklute
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Construction of Alkylated Stereocenters
2017Hirohisa Ohmiya and Masaya Sawamura at Hokkaido University reported (Angew. Chem. Int. Ed. 2013, 52, 5350) the copper-catalyzed, γ-selective allylation of terminal alkyne 1 to produce the chiral skipped enyne 3 with high ee. A method to synthesize asymmetric skipped diene 6 via copper-catalyzed allylic allylation of diene 4 was developed (Chem. Commun.
Zara M. Seibel, Tristan H. Lambert
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Construction of Multiple Stereocenters
2017Erick M. Carreira at ETH Zürich reported (Science 2013, 340, 1065) the enantioselective α-allylation of aldehyde 1 with alcohol 2 to produce 3 using a dual catalytic system involving a chiral iridium complex and amine 5. This stereodivergent method allows access to all of the possible stereoisomers of 3.
Léa Benkoski, Tristan H. Lambert
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Catalytic Enantioselective Construction of All‐Carbon Quaternary Stereocenters
ChemInform, 2006AbstractChemInform 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.
Barry M. Trost, Chunhui Jiang
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2005
Foreward. Preface. List of Contributors. Symbols and Abbreviations. 1 Important Natural Products (Hirokazu Arimoto and Daisuke Uemura). 1.1 Introduction. 1.2 Alkylation of Tertiary Carbon Centers. 1.3 Cycloaddition to Alkenes. 1.4 Rearrangement Reactions. 1.5 Carbometallation Reactions. 1.6 C-H Functionalization Reactions.
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Foreward. Preface. List of Contributors. Symbols and Abbreviations. 1 Important Natural Products (Hirokazu Arimoto and Daisuke Uemura). 1.1 Introduction. 1.2 Alkylation of Tertiary Carbon Centers. 1.3 Cycloaddition to Alkenes. 1.4 Rearrangement Reactions. 1.5 Carbometallation Reactions. 1.6 C-H Functionalization Reactions.
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Enantioselective Synthesis of Functionalized Quaternary Stereocenters
European Journal of Organic Chemistry, 2015AbstractAn enantioselective synthesis of functionalized quaternary stereocenters was developed from amino alcohol derived (bromoalkylidene)morpholinones. Stereoselective cross‐coupling of the morpholinones with arylboronic acids or alkyl trifluoroborates provided a variety of disubstituted alkylidenemorpholinones.
Amarender Manchoju +2 more
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Enantioselective Synthesis of Quaternary Stereocenters via Chromium Catalysis
Organic Letters, 2016Asymmetric allylation of aldehydes with γ-disubstituted allyl halides has been achieved in the presence of a sulfonamide/oxazoline chromium complex. A variety of synthetically useful α-homoallylic alcohols with two consecutive stereogenic centers, including one quaternary carbon, can be accessed in a highly diastereoselective and enantioselective ...
Yang, Xiong, Guozhu, Zhang
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The relative and absolute configurations of stereocenters in caryophyllose
Carbohydrate Research, 1995Abstract The complete stereochemistry of the monosacccharide 3,6,10-trideoxy-4-C-[(R)-1-hydroxyethyl]- d -erythro- d -gulo-decose, named caryophyllose, obtained from the lipopolysaccharide fraction of Pseudomonas caryophylli is reported. The relative stereochemistry was inferred by 1H NMR analysis and the absolute configuration was independently ...
M. ADINOLFI +6 more
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Construction of Single Stereocenters
2015James L. Leighton at Columbia University reported (Nature 2012, 487, 86) that the commercially available allylsilane 2 allylated acetoacetone (1) to furnish the enantioenriched tertiary carbinol 3. Alexander T. Radosevich demonstrated (Angew. Chem. Int. Ed.
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ChemInform Abstract: Enantioselective Construction of Quaternary Stereocenters
ChemInform, 2002AbstractChemInform 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.
Jens Christoffers, Alexander Mann
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