Results 41 to 50 of about 487 (160)

Quantification Of Lignin Hydroxyl Containing Functional Groups Via 31p{1h} Nmr Spectroscopy And Synthesis Of Lignin Degradation Standards [PDF]

open access: yes, 2017
The focus of this thesis is on the structural characterization of lignin, a complex phenol-based heteropolymer. In the first part of the study, functionalization of lignin and its known degradation products by 2-chloro-4,4,5,5-tetramethyl-1,3,2 ...
Schumaker, Joshua E.
core   +1 more source

Synthese pharmakologisch relevanter Ringsysteme durch neuartige Cyclisierungsreaktionen von Dinucleophilen mit Dielektrophilen [PDF]

open access: yes
Ziel der vorliegenden Arbeit sollte es sein, Dielektrophile mit Dinucleophilen zur Reaktion zu bringen und durch diese Cyclisierungsreaktionen pharmakologisch interessante Ringsysteme aufzubauen.
Rotzoll, Sven (gnd: 136242456)
core   +1 more source

Synthesis, Evaluation and Structural Studies of Antiproliferative Tubulin-targeting Azetidin-2-ones [PDF]

open access: yes, 2011
A series of azetidin-2-ones substituted at positions 2, 3 and 4 of the azetidinone ring scaffold were synthesised and evaluated for antiproliferative, cytotoxic and tubulin binding activity.
Bergin, Orla   +7 more
core   +1 more source

Preparation of novel steroidal conjugates as potential diagnostic and therapeutic agents with an emphasis on quinoid and halogenated moieties [PDF]

open access: yes, 2016
Steroids bonded to pharmaceutically active molecules are interesting candidates as therapeutic agents. In this work, a number of potentially bioactive residues, which include the quinoid moiety, have been synthesized as a simple steroid quinone hybrid ...
Juma Alsoom, Nuha Obaid
core   +1 more source

Lewis Acid Mediated Ring Expansion Reaction of Benzo[b]cyclopropa[e]pyran-7-ol Acetates: Facile Synthesis of 2-Alkyl Substituted 2,3-Dihydro-1-benzoxepins.

open access: yes, 2000
- In the presence of trimethylsilyl trifluoromethanesulfonate (TMSOTf), benzo[ b ]cyclopropa[ e ]pyran-7-ol acetates easily reacted with silyl enol ethers to give 2-alkyl substituted 2,3-dihydro-1-benzoxepin derivatives in good yields.
Y. Sugita, H. Hosoya, I. Yokoe
semanticscholar   +1 more source

Effects of anticancer drugs, metals and antioxidants on cytotoxic activity of benzothiepins/benzoxepins [PDF]

open access: yes, 2000
The International Institute of Anticancer ...
坂上, 宏   +4 more
core  

Acid-Catalyzed Cleavage of 1,4-Dimethyl-1,4-dihydronaphthalene 1,4-Endoperoxide. Reactivity of the Resulting Hydroperoxy Carbocation with Nucleophiles

open access: yes, 1985
In the presence of acids, 1,4-dimethyl-1,4-dihydronaphthalene 1,4-endoperoxide readily reacts with nucleophiles to produce methyl- and ring-substituted naphthalenes in high yields. The regioselectivity observed depends on the nucleophile.
Boukouvalas, John   +3 more
core   +2 more sources

An update on organohalogen metabolites produced by basidiomycetes

open access: yes, 2003
Basidiomycetes are an ecologically important group of higher fungi known for their widespread capacity to produce organohalogen metabolites. To date, 100 different organohalogen metabolites (mostly chlorinated) have been identified from strains in 70 ...
Field, J.A., Wijnberg, J.B.P.A.
core   +3 more sources

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