Inhibitory properties of aromatic thiosemicarbazones on mushroom tyrosinase: Synthesis, kinetic studies, molecular docking and effectiveness in melanogenesis inhibition
The group of 19 thiosemicarbazones (TSCs) were synthesized and its inhibitory activity toward mushroom tyrosinase and ability to inhibition of melanogenesis in B16 cells were investigated. Moreover, molecular docking of these compounds to the active site of the enzyme was performed. The obtained results allowed to make the structure-activityrelationship (SAR) analysis. Kinetic studies revealed that
4-(3-Nitrophenyl)thiazol-2-ylhydrazone derivatives as antioxidants and selective hMAO-B inhibitors: synthesis, biological activity and computational analysis
Abstract A new series of 4-(3-nitrophenyl)thiazol-2-ylhydrazone derivatives were designed, synthesised, and evaluated to assess their inhibitory effect on the human monoamineoxidase (hMAO) A and B isoforms. Different (un)substituted (hetero)aromatic substituents were linked to N1 of the hydrazone in order to establish robust structure–activity relationships. The results of the biological testing demonstrated
(wherein R
1
and R
4
are the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, substituted or unsubstituted lower alkynyl, substituted or unsubstituted lower alkenyl, or the like; R
5
represents a substituted or unsubstituted heterocyclic group, substituted or unsubstituted aryl, or the like; R
2
represents —C(═W)R
6
or the like; R
3
represents a hydrogen atom, —C(═W
A
)R
6A
, or the like)
Antitumor agents which comprises a thiadiazoline derivative represented by the aforementioned general formula (I) or a pharmacologically acceptable salt thereof as an active ingredient are provided.
(wherein R
1
and R
4
are the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, substituted or unsubstituted lower alkynyl, substituted or unsubstituted lower alkenyl, or the like; R
5
represents a substituted or unsubstituted heterocyclic group, substituted or unsubstituted aryl, or the like; R
2
represents —C(═W)R
6
or the like; R
3
represents a hydrogen atom, —C(═W
A
)R
6A
, or the like)
Antitumor agents which comprises a thiadiazoline derivative represented by the aforementioned general formula (I) or a pharmacologically acceptable salt thereof as an active ingredient are provided.
A mitotic kinesin Eg5 inhibitor which comprises a thiadiazoline derivative represented by the general formula (I) or a pharmacologically acceptable salt thereof as an active ingredient:
[wherein R
1
represents a hydrogen atom and the like, R
2
represents a hydrogen atom, —C(═W)R
6
(wherein W represents an oxygen atom or a sulfur atom, and R
6
represents substituted or unsubstituted lower alkyl and the like) and the like, R
3
represents —C(═Z)R
19
(wherein Z represents an oxygen atom or a sulfur atom, and R
19
represents substituted or unsubstituted lower alkyl and the like) and the like, R
4
represents substituted or unsubstituted lower alkyl and the like, and R
5
represents substituted or unsubstituted aryl and the like] and the like are provided.