Bis(arylimino)pyridine derivatives of Group 4 metals: preparation, characterization and activity in ethylene polymerization

2005 ◽  
pp. 914 ◽  
Author(s):  
Fausto Calderazzo ◽  
Ulli Englert ◽  
Guido Pampaloni ◽  
Roberto Santi ◽  
Anna Sommazzi ◽  
...  
Keyword(s):  
Ethylene Polymerization ◽  
Pyridine Derivatives ◽  
Group 4 ◽  
Group 4 Metals ◽  
Derivatives Of

scholarly journals Hydride derivatives of Group 4 metals with the ansa-( SiMe2)2(η5-C5H3)2 ligand

1996 ◽  
Vol 515 (1-2) ◽  
pp. 33-36 ◽  
Author(s):  
Tomás Cuenca ◽  
Mikhail Galakhov ◽  
Eva Royo ◽  
Pascual Royo
Keyword(s):  
Group 4 ◽  
Group 4 Metals ◽  
Derivatives Of

Aminofluorenyl−Pentamethylcyclopentadienyl and Bis(aminofluorenyl) Derivatives of Group 4 Metals

2000 ◽  
Vol 19 (26) ◽  
pp. 5608-5613 ◽  
Author(s):  
Stephen A. Miller ◽  
John E. Bercaw
Keyword(s):  
Group 4 ◽  
Group 4 Metals ◽  
Derivatives Of

Phospha Derivatives of Tris(2-aminoethyl)amine (tren) and Tris(3-aminopropyl)amine (trpn): Synthesis and Complexation Studies with Group 4 Metals

2015 ◽  
Vol 34 (6) ◽  
pp. 1118-1128 ◽  
Author(s):  
Malte Sietzen ◽  
Sonja Batke ◽  
Lukas Merz ◽  
Hubert Wadepohl ◽  
Joachim Ballmann
Keyword(s):  
Group 4 ◽  
Complexation Studies ◽  
Group 4 Metals ◽  
Derivatives Of

Synthesis of azaanthraquinones: homolytic substitution of pyridines

1982 ◽  
Vol 35 (7) ◽  
pp. 1451 ◽  
Author(s):  
DW Cameron ◽  
KR Deutscher ◽  
GI Feutrill ◽  
DE Hunt
Keyword(s):  
Ring Closure ◽  
Pyridine Derivatives ◽  
Derivatives Of ◽  
Substituted 1 ◽  
Homolytic Substitution

Synthesis of specific di- and tri-hydroxyazaanthraquinones by Friedel-Crafts procedures is limited by orientational ambiguity and by the lack of reactivity of pyridine derivatives in electrophilic acylation processes; however, suitable pyridines have been made to undergo radical benzoylation and benzylation at unsubstituted positions 2, 4 and 6. In particular, derivatives of pyridine-3-carbo-nitrile have been benzoylated at positions 2 and 4. Ring closure by intramolecular Houben-Hoesch reaction has then led to specifically substituted 1-and 2-azaanthraquinones and thence to the antibiotic bostrycoidin (1).

New 4-Hydroxypyridine and 4-Hydroxyquinoline Derivatives as Inhibitors of NADH-ubiquinone Reductase in the Respiratory Chain

1989 ◽  
Vol 44 (7-8) ◽  
pp. 609-616 ◽  
Author(s):  
Kun Hoe Chung ◽  
Kwang Yun Cho ◽  
Yasuko Asami ◽  
Nobutaka Takahashi ◽  
Shigeo Yoshida
Keyword(s):  
Electron Transport ◽  
Respiratory Chain ◽  
Side Chain ◽  
Pyridine Derivatives ◽  
Transport Function ◽  
Optimal Length ◽  
Structure Activity ◽  
Membrane Effect ◽  
Relationship Of ◽  
Derivatives Of

Many derivatives of 2,3-dim ethoxy-4-hydroxypyridine, which were designed from examination of the structure-activity relationship of piericidins, were tested for inhibition of NADH-UQ reductase. The lipophilic side chain of those compounds was indicated to be a key part for activity and its optimal length was conjectured. By the use of two different phases of assay material, intact mitochondria and submitochondria, the size of a membrane effect was shown to depend on the structure of the side chain. 4-Hydroxyquinoline derivatives were also tested for an analogous role in relation to the electron transport function of menaquinone, and they were proven to be inhibitors of NADH-UQ reductase as good as the pyridine derivatives.

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