four new curcurmin analogs (compounds 1, 2, 17 and 18) were synthesized. 17 [3,5-bis(4-hydroxy-3-methoxy-5-methylcinnamyl)N-methylpiperidone] showed high activity with GI50, TGI, and LC50 MG-MID values of 21.3, 70.7, and 97.7 microM, respectively. 18 [3,5-bis(4-hydroxy-3-methoxy-5-methylcinnamyl)-N-ethylpiperidone] showed the highest activity in this study with GI50, TGI, LC50 MG-MID values of 4.4, 33.8, 89.1 microM, respectively. 18 is even more active than curcumin with GI50, TGI, LC50 MG-MID values of 38.4, 35.6, 66.0 microM; respectively. 8 showed moderate selectivity towards Leukemia cell line-subpanel with a ratio of 5.6 (curcumin ratio: 1.2 for the same subpanel). The in vitro anti-tumor screening reveals that the results go hand in hand with the in vitro free radical scavenging effects. The antioxidant effect of these compounds depends mainly on the stabilization of the formed phenoxy free radical for which the p-hydroxy phenyl moiety is essential. o-substitution by electron-donating groups like the o-methoxy group (and to a even higher degree by the ethoxy group) increases the stability of phenoxy free radical, hence increasing both free scavenging and anti-tumor effects. Increasing the alkyl group chain on the N in the series of substituted N-alkyl piperidones as well as the extension of conjugation, increases the stabilization of phenoxy free radical and thereby the activity towards both free radical scavenging and anti-tumor effects. This may be attributed to an increased positive inductive effect and/or increased lipophilicity of the new compounds, a fact which is proven by the superior activities of compounds 17 and 18.
An antitumor is a substance which inhibits tumours.
The result of a chemical synthesis is a new molecule.
the synthesis of new chemical chemical by chemists.
synthesis reaction
The prefix anti- means against, so antitumor treatment is anything designed to fight the tumor, such as chemotherapy and radiation.
the synthesis of new chemical chemical by chemists. Or A
- chemical synthesis- chemical analysis- chemical properties
Chemical synthesis form a new molecule; nuclear fusion form a new atom.
Oxidation is not a type of synthesis or decomposition reaction. It is a chemical reaction that involves the loss of electrons by a substance. It can lead to the formation of new compounds through various chemical processes.
The polymerization process is an example.
Aniline is used in the synthesis of numerous pharmaceutical compounds. It serves as a starting material for the production of various analgesics, antipyretics, and anti-inflammatory drugs. Additionally, aniline derivatives are employed in the synthesis of certain antibiotics, antimalarials, and antitumor agents.
Synthesis