1,720,976 research outputs found
Reversible Isomerization and 1,2-Irreversible Transfer of Acetyl Groups in the Reaction of 1-Acetoxy-1-phenylthio-2-propanone in the AcOH / AcOK System.
No full textSynthesis of chiral 2-methyl-5,6,7,8-tetrahydroquinolines from naturally occurring monoterpenes
No full textReactions of alfa-Diazoketones. II. A Study of the Influence of Alkyl and Phenyl alfa'-Substitutions on the Acetolysis of alfa'-Arylthio-alfa-diazoketones. Further Examples of Intramolecular Rearrangement Involving the 1,3 Shift of the Phenylthio Group.
No full textNucleophilic Substitution of alfa-Haloketones. XX. New Features in the Acetolysis of 1-Chloro-3-phenylthio-2-propanone. The Intermediacy of Ion Pairing in the Reversible 1,3 Shift of the Chlorine.
No full textChiral thienylpyridines as N,S-ligands for asymmetric catalysis. Palladium-catalyzed allylic alkylation and copper-catalyzed cyclopropanation reactions
No full textReactions of alfa Diazoketones. I. Acetolysis of alfa'-Aryloxy- and alfa '-Arylhio-alfa -diazoketones. An Intramolecular Rearrangement Involving the Neighbouring Thioether Function
No full textOptically Active Heteroaromatic Compounds. IX. The Synthesis of Monoalkyl-Substituted Optically Active Pyridines
No full textOptically active 2-, 3-, and 4-allkyl substituted pyridines bearing the chirality centre at the alkyl group were synthesized by different procedures starting from easily available chral synthon
Synthesis of 4-(diphenylphosphanylmethyl)- and 4-(phenylthiomethyl)-1,4-methano-11,11-dimethyl-1,2,3,4-tetrahydroacridine: new N-P and N-S camphor-derived chiral ligands for asymmetric catalysis
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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