Results 271 to 280 of about 119,652 (298)

An enantioselective approach to (+)-laurencin

Organic & Biomolecular Chemistry, 2008
A convergent enantioselective route to an advanced intermediate for the synthesis of the marine natural product (+)-laurencin has been developed. The methodology employs ring-opening of an ephedrine-based spiro-epoxide with a chiral secondary alcohol, hemiacetal allylation and ring closing metathesis as the key steps for elaboration of the ...
Vikrant A, Adsool, Sunil V, Pansare
openaire   +2 more sources

Enantioselective

Angewandte Chemie (International ed. in English)
Even with only a catalytic amount of chiral bis(dihydrooxazole) 1 as external ligand, the rearrangement of benzyl ethers to alcohols [Eq. (1)] proceeds with high enantioselectivity (over 60 % ee). This reaction represents the first example of an enantioselective [1,2] Wittig rearrangement.
, Tomooka, , Yamamoto, , Nakai
openaire   +1 more source

An enantioselective assay for (±)-modafinil

Journal of Pharmaceutical and Biomedical Analysis, 2001
Enantiomers of modafinil, (diphenylmethyl)sulphinyl-2-acetamide, were separated by an amylose tris[(S)-1-phenylethylcarbamate] chiral stationary phase, using acetonitrile: water (25:75 v/v) as mobile phase, with excellent selectivity (alpha=1.4) and resolution factors (R(s)=1.5).
Q B, Cass, C K, Kohn, S A, Calafatti, H Y, Aboul-Enein   +3 more
openaire   +2 more sources

Enantioselective Biosynthesis of (+)- and (−)-Auranthines

Journal of the American Chemical Society
In nature, organisms produce various bioactive natural products (NPs). Most NPs target naturally occurring macromolecules, such as proteins and nucleotides. Thus, NPs are produced in a stereocontrolled manner except for the cases where nonenzymatic reactions are involved in the biosynthesis. This is why stereoisomers, especially enantiomers, are rarely
Shinji Kishimoto, Tsubasa Tamura, Takumi Okamoto, Kenji Watanabe   +3 more
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Organocatalytic Enantioselective Photoreactions

Angewandte Chemie International Edition, 2006
AbstractChemInform 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.
openaire   +2 more sources

Recent Advances in the Enantioselective Synthesis of Chiral Amines via Transition Metal-Catalyzed Asymmetric Hydrogenation

Chemical Reviews, 2022
Albert Cabré, Xavier Verdaguer, Antoni Riera   +2 more
exaly  

Recent developments in enantioselective titanium-catalyzed transformations

Coordination Chemistry Reviews, 2022
Hélène Pellissier
exaly  

Catalytic Enantioselective Desymmetrization Reactions to All-Carbon Quaternary Stereocenters

Chemical Reviews, 2016
Xing-Ping Zeng, Zhong-Yan Cao, Yu-Hui Wang   +2 more
exaly  

Recent developments in enantioselective scandium–catalyzed transformations

Coordination Chemistry Reviews, 2016
Hélène Pellissier
exaly  

Enantioselective Synthesis of Atropisomers with Multiple Stereogenic Axes

Angewandte Chemie - International Edition, 2020
Xiao-Ze Bao, Jean Rodriguez, Damien Bonne   +2 more
exaly