Preparation and antidiabetic activity of new substituted 3,5-diarylpyrazolesulfonylurea derivatives

Synthesis and biological evaluation of fluoropyrazolesulfonylurea and thiourea derivatives as possible antidiabetic agents

Fluorinated pyrazoles, benzenesulfonylurea and thiourea and their cyclic sulfonylthiourea derivatives were prepared as hypoglycemic agents. The chemistry involves the condensation of 4-hydrazino benzenesulfonamide hydrochloride with fluorochalcones to give pyrazoline derivatives which upon oxidation with bromine water afforded corresponding pyrazoles. Reaction of pyrazolines with isocyanates and isothiocyanates give the corresponding ureas and thioureas. Subsequent cyclization of these thiourea derivatives with ethyl bromoacetate and α-bromoacetophenone yielded the 4-oxothiazolidines and thiazolines, respectively. Preliminary biological screening of the prepared compounds revealed significant antidiabetic activity. Molecular and biological properties calculations revealed favorable drug-like profiles of six compounds. The structure-activity relationship (SAR) and in silico drug relevant properties calculations (HBD, HBA, tPSA, miLogP, molecular weight, % ABS, drug-likeness and drug score) endorse that these compounds are potential leads for future drug discovery study.

1,3-Dipolar Cycloaddition Reactions between Ethyl Diazoacetate and Substituted Alkynes: A Density Functional Theory Study

A theoretical study on the reactivity and regioselectivity of 1,3-dipolar cycloaddition reactions of ethyl diazoacetate (EDA) with ethynes (CH≡CX, X=H, CH3, n-But, CF3, CO2Et, C6H5, p-CH3OC6H4 and p-NO2C6H4) has been carried out by means of several theoretical approaches, activation energies, frontier molecular orbital (FMO) theory, conceptual density functional theory reactivity indices and hard and soft acid and base theory. Potential energy surface analysis and intrinsic reaction coordinate calculations show that these cycloadditions follow an asynchronous concerted mechanism with a low or non-polar character, displaying C-regioselectivity. Moreover, the reaction of EDA with electron-deficient alkynes is faster compare to electron-rich ethynes. Reactions of EDA with electron-deficient and electron-rich alkynes are normal electron demand and inverse electron demand cycloadditions, respectively, because of moderate electrophilicity and nucleophilicity of EDA. This result is confirmed by FMO analysis and reactivity indices.

Preparation and antidiabetic activity of new substituted 3,5-diarylpyrazolesulfonylurea derivatives. II: Structure-activity relationship

Four series of substituted p-(3,5-diaryl-2-pyrazoline-1) benzenesulfonylurea and thiourea derivatives, along with their corresponding substituted p-(3,5-diarylpyrazole-1) benzenesulfonylurea and thiourea derivatives, were prepared for evaluation as hypoglycemic agents. Preliminary biological testing revealed that the new compounds possess potent hypoglycemic activity.

Synthesis and antidiabetic activity of some sulfonylurea derivatives of 3,5-disubstituted pyrazoles

Two series of 3,5-disubstituted pyrazolesulfonylurea derivatives were prepared and evaluated as hypoglycemic agents. Preliminary biological testing revealed that the new compounds possess potent hypoglycemic activity.

Synthesis and antidiabetic activity of some sulfonylurea derivatives of 3,4,5-trisubstituted pyrazoles

Three series of 3,4,5-trisubstituted pyrazolesulfonylurea derivatives were prepared and evaluated as hypoglycemic agents. Preliminary biological testing revealed that the new compounds possess moderate hypoglycemic activity.

Preparation and antidiabetic activity of cyclic sulfonylthiourea derivatives

3-Substituted 5-methyl-1-(p-[(3,5-dimethyl)pyrazol-1-yl]-, 5-methyl-1-(p-[(5-methyl-3-carboxy)pyrazol-1-yl]-, 1-(p-[(3-methyl-5-phenyl)pyrazol-1-yl]-, and 1-(p-[(3-methyl-4-bromo-5-phenyl)pyrazol-1-yl]benzenesulfonyl)-2-thiohydantoin and their 5-methyl-2-thiohydantoin and 5,6-dihydro-4(3H)-oxo-2(1H)-pyrimidinethione derivatives were prepared for evaluation as hypoglycemic agents. Biological testing showed that some of these compounds possessed antidiabetic activity.