An efficient method for the synthesis of 2,5-disubstituted1,3,4-oxadiazolesfrom isothiocyanates and hydrazides through cyclodesulfurization in the presence of (O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate) TBTU as an uronium coupling reagent has been developed. The present methodology offers several advantages, such as simple and easy work-up procedures, mild reaction conditions
Tryptophan and thiosemicarbazide derivatives: design, synthesis, and biological evaluation as potential β-d-galactosidase and β-d-glucosidase inhibitors
作者:Reema Abu Khalaf、Ahmed Mutanabbi Abdula、Mohammad S. Mubarak、Mutasem O. Taha
DOI:10.1007/s00044-014-1314-4
日期:2015.6
Glycosidases, including beta-d-galactosidase and beta-d-glucosidase, are involved in a range of metabolic disorders, such as cancer, viral or bacterial infections, and diabetes. Previously, we scanned the pharmacophoric space of these enzymes and had a self-consistent and predictive quantitative structure-activity relationship that was used to identify several beta-d-galactosidase and beta-d-glucosidase inhibitors via in silico search of structural databases. Guided by the preceding modeling efforts, synthesis of a series of tryptophan and thiosemicarbazide derivatives as beta-d-galactosidase and beta-d-glucosidase inhibitors that match the generated pharmacophores followed by in vitro bioassay was carried out. Synthesized compounds 3c (37 % inhibition at 100 A mu M) and 4d (49 % inhibition at 100 A mu M) exhibited the best inhibitory bioactivities against beta-d-galactosidase and beta-d-glucosidase, respectively. They can serve as a promising lead compounds for the development of potential glycosidase inhibitors.
RUDNICKA W.; FOKS H.; JANOWIEC M.; ZWOLSKA-KWIEK Z., ACTA POL. PHARM., 43,(1986) N 6, 523-528
作者:RUDNICKA W.、 FOKS H.、 JANOWIEC M.、 ZWOLSKA-KWIEK Z.