1,721,008 research outputs found
Stereoselective Arylation Using Metal Phenolates. Complementary Synthesis of 5-C-Arylxylofuranose Derivatives of Either L-ido or D-gluco Configuration.
No full textThe Diastereoselective Arylation of Arabinofuranose Derivatives Using Bromomagnesium Phenolates: Synthesis of beta-D- and alpha-L-Arabinofuranosyl Phenols.
No full textC-Arylation at the Anomeric Centre of Sugars by Bromomagnesium Phenolates: Synthesis of 1,1- and 5,5-Bis-(2-Hydroxyaryl)-C-Glycosyl Derivatives.
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C-Heteroarylations of Sugars by Indolylbromomagnesium Salts. Synthesis of 3-(Alditol-1-yl)indoles and Their Cyclization to Indole C-Nucleoside Analogues.
No full textSynthesis of 1-(2-Hydroxyaryl)-1,2,3-propanetriol and 1-(2-Hydroxyaryl)-2-amino-1,3-propanediol Derivatives of either threo or erythro Configuration.
No full textRecognizing social relationships from an egocentric vision perspective
No full textIn this chapter we address the problem of partitioning social gatherings into interacting groups in egocentric scenarios. People in the scene are tracked, and their head pose and 3D location are estimated. Following the formalism of the f-formation, we define as regards the orientation and distance inherently social pairwise features capable of describing how two people stand in relation to one another. We present a structural SVM-based approach to learn how to weight each component of the feature vector depending on the social situation being applied to. To better understand the social dynamics, we also estimate what we call the social relevance of each subject in a group using a saliency attentive model. Extensive tests on two publicly available datasets show that our solution achieves encouraging results when detecting social groups and their relevant subjects in challenging egocentric scenarios
Facile Conversion of 2,3,4,5-Tetra-O-benzyl-D-glucopyranose into 1,3,4,5-Tetra-O-benzyl-L-sorbopyranose.
No full textPhenol-Acetaldehyde Oligomers. 2. One- and Two-Dimensional 13C NMR and Photochemically Induced Dynamic Nuclear Polarization 1H NMR Studies in Dimethyl Sulfoxide.
No full textγ-Substituted pyrrole-based silyl dienol ethers as aα-amino acid enolate equivalents: A versatile entry to racemic α-substituted α-amino acids
No full textγ-Substituted siloxypyrrole derivatives 5-7 have been synthesized by direct alkylation of N-(tert-butoxycarbonyl)-2-(tert-butyldimethylsiloxy)pyrrole 1. These underwent subsequent alkylation with alkyl halides or aldehydes to produce γ,γ-disubstituted α,β-unsaturated lactam intermediates in good yields. Oxidative cleavage of the C(3)-C(4) bond within the lactam moiety gave rise to a number of α-substituted α-amino acids. These include racemic α-methylphenylalanine 14, α-benzylphenylalanine 15, α-benzylserine 18 and α- methylthreonine 21
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