scholarly journals Synthesis, anticancer and FGFR1 inhibitory activity of isoindolo[2,1-a][1,2,4]triazino[2,3-c]quinazoline derivatives

2016 ◽  
Author(s):  
O. Yu. Voskoboynik ◽  
S. A. Starosyla ◽  
M. V. Protopopo ◽  
H. P. Volynets ◽  
S. V. Shyshkina ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Acetic Acid ◽  
Inhibitory Activity ◽  
Spectral Properties ◽  
Docking Study ◽  
Benzoic Acids ◽  
Low Field ◽  
Quinazoline Derivatives

Presented manuscript describes the synthesis, antitumor and FGFR1 inhibitory activity of novel isoindolo[2,1-a][1,2,4]triazino[2,3-c]quinazolines. It was shown that mentioned above substances may be prepared by interactionof 3-(2-amino-3-R2-5-R3-phenyl)-6-R1-1,2,4-triazin-5(2H)-ones with 2-formylbenzoic and 6-formyl-2,3-dimethoxybenzoic (opianic) acids in acetic acid. It was shown that proper 2-(2-oxo-3-R-6,7-dihydro-2H-[1,2,4]triazino[2,3-c]quinazolin-6-yl)benzoic acids (or corresponded dimethoxysubstituted analogues) may be considered as intermediates of thereaction. Spectral properties of synthesized compounds were studied, it was shown that protons in position 8 wereobserved at low field as result of the presence of hydrogen bond between hydrogen at position 8 and oxygen atposition 10. The anticancer assay data allowed to identify synthesized compounds as promising antitumor agents.The FGFR1 inhibitory activity of synthesized compounds was detected and docking study aimed to the evaluationof mentioned action was conducted.

scholarly journals Drug-induced conversion of liver haem into modified porphyrins. Evidence for two classes of products

1980 ◽  
Vol 187 (1) ◽  
pp. 285-288 ◽  
Author(s):  
F De Matteis ◽  
A H Gibbs
Keyword(s):  
Inhibitory Activity ◽  
Spectral Properties ◽  
Drug Induced ◽  
Mechanism Of Inhibition ◽  
Green Pigments

A porphyrin with inhibitory activity towards protohaem ferro-lyase (EC 4.99.1.1) was isolated from the liver of mice given either griseofulvin or isogriseofulvin. This porphyrin resembles closely in chromatographic and spectral properties the inhibitory pigment isolated after treatment with 3,5-diethoxycarbonyl-1,4-dihydrocollidine, but differs from other green pigments that do not inhibit protohaem ferro-lyase. A hypothesis is proposed to account for the differences in properties between the two groups of pigments and for the mechanism of inhibition of the enzyme.

scholarly journals PHYTOCHEMICALS AS POTENTIAL INHIBITORS OF LANOSTEROL 14 Α-DEMETHYLASE (CYP51) ENZYME: AN IN SILICO STUDY ON SIXTY MOLECULES

2020 ◽  
pp. 18-30
Author(s):  
ASHWINI KHANDERAO JADHAV ◽  
PATHAN KAMRAN KHAN ◽  
SANKUNNY MOHAN KARUPPAYIL
Keyword(s):  
Hydrogen Bond ◽  
Candida Albicans ◽  
Docking Study ◽  
Docking Studies ◽  
Antifungal Drugs ◽  
Ergosterol Biosynthesis ◽  
Binding Residue ◽  
Therapeutic Drugs ◽  
Ergosterol Synthesis ◽  
Potential Inhibitors

Lanosterol 14 α-demethylase (CYP51) is a key protein involved in ergosterol biosynthesis of Candida albicans and a crucial target for ergosterol synthesis inhibition. However, in the last two decades drug resistance is reported under clinical situations to most of the prescribed antifungal drugs like azole group of drugs. In this study, molecular docking of sixty plant molecules with Lanosterol 14 α-demethylase protein has been done. The homology modeling tool PHYRE2 was used to predict the structure of Lanosterol 14 α-demethylase. Predicted structure was used for docking studies with sixty plant molecules by using Autodock 1.5.6 cr2™. Among the sixty plant molecules, forty-seven were found to form hydrogen bond and the rest of the plant molecules did not form a hydrogen bond with Lanosterol 14 α-demethylase. Docking study of a library of sixty molecules revealed that 48 plant molecules showed an excellent and good binding affinity with predicted protein model Lanosterol 14 α-demethylase of Candida albicans. The binding residue comparison of docked molecules with that of Ketoconazole revealed, fourteen molecules have similar binding residue. These fourteen molecules may have a similar mode of action as that of Ketoconazole. These molecules should be screened and used to discover new antifungal therapeutic drugs.

scholarly journals A new solvate of epalerstat, a drug for diabetic neuropathy

2017 ◽  
Vol 73 (8) ◽  
pp. 1264-1267 ◽  
Author(s):  
Okky Dwichandra Putra ◽  
Daiki Umeda ◽  
Kaori Fukuzawa ◽  
Mihoko Gunji ◽  
Etsuo Yonemochi
Keyword(s):  
Hydrogen Bond ◽  
Acetic Acid ◽  
Carboxylic Acid ◽  
Hydrogen Bonds ◽  
Diabetic Neuropathy ◽  
Dihedral Angle ◽  
Phenyl Ring ◽  
Acid Moiety ◽  
Acta Cryst ◽  
Carboxylic Acid Groups

Epalerstat {systematic name: (5Z)-5-[(2E)-2-methyl-3-phenylprop-2-en-1-ylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidine-3-acetic acid} crystallized as an acetone monosolvate, C15H13NO3S2·C3H6O. In the epalerstat molecule, the methylpropylenediene moiety is inclined to the phenyl ring and the five-membered rhodamine ring by 21.4 (4) and 4.7 (4)°, respectively. In addition, the acetic acid moiety is found to be almost normal to the rhodamine ring, making a dihedral angle of 85.1 (2)°. In the crystal, a pair of O—H...O hydrogen bonds between the carboxylic acid groups of epalerstat molecules form inversion dimers with an R 2 2(8) loop. The dimers are linked by pairs of C—H...O hydrogen bonds, enclosing R 2 2(20) loops, forming chains propagating along the [101] direction. In addition, the acetone molecules are linked to the chain by a C—H...O hydrogen bond. Epalerstat acetone monosolvate was found to be isotypic with epalerstat tertrahydrofuran solvate [Umeda et al. (2017). Acta Cryst. E73, 941–944].

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