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Quinoxaline chemistry. Part11. 3-Phenyl-2-[phenoxy-and phenoxymethyl]-6(7) or 6,8-substituted quinoxalines and N-[4-(6(7)-substituted or 6,8-disubstituted-3-phenylquinoxalin-2-yl)hydroxy or hydroxymethyl]benzoylglutamates. Synthesis and evaluation of in vitro anticancer activity and enzymatic inhibitory activity against dihydrofolate reductase and thymidylate synthase
No full textBinaphthalene-Templated N,S- and N,P-Heterobidentate Ligands with an achiral oxazoline pendant
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Binaphthalene-templated N,S- and N,P-heterobidentate Ligands with an Oxazoline Pendant. Synthesis and Assessment in Asymmetric Catalysis
No full textNovel chiral binaphthalene-core ligands where an oxazoline pendant is flanked by a sulfur 6, or by an atropisomeric phosphite donor 5, have been synthesized using the hydroxy binaphthyl oxazoline 7 as the common starting material. This intermediate is obtained in high e.e. by Ni-catalyzed asymmetric heterocoupling of two suitably 1,2-disubstituted naphthalene derivatives. Ligands 5 and 6 feature a stereogenic axis as the unique source of chirality. They display chelate binding towards Rh(I) centres affording cationic complexes which have been inspected for their catalytic activity in several asymmetric reactions with modest success. The Pd catalyst derived from the sulfur-containing oxazoline 6a provides up to 66% e.e. in the allylic alkylation of 1,3-diphenylallyl esters with dimethyl malonate
Diidrochinossalinoni, Chinossalinoni e chinossalindioni analoghi del Bemoradan quali potenziali inibitori della fosfodiesterasi ad attività cardiotonica e NMDA antagonisti
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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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