29635-99-2Relevant articles and documents
Simple and Efficient Synthesis of 5-Substituted-3-phenyl-2-thioxoimidazolidin-4-one Derivatives from S -Amino Acids and Phenylisothiocyanate in et 3N/DMF-H 2O
Jangale, Asha D.,Wagh, Yogesh B.,Tayade, Yogesh A.,Dalal, Dipak S.
supporting information, p. 1876 - 1886 (2015/08/03)
A concise approach for the transformation of various S-amino acids into the 5-alkyl-3-phenyl-2-thioxoimidazolidin-4-one heterocycles using phenylisothiocyanate is described. Phenylthiohydantoins of amino acid were synthesized at room temperature in Et3N/DMF-H2O with easy workup and excellent yields.
Modulation of the pharmacological activities of secretory phospholipase A2 from Crotalus durissus cascavella induced by naringin
Santos, Marcelo L.,Toyama, Daniela O.,Oliveira, Simone C. B.,Cotrim, Camila A.,Diz-Filho, Eduardo B. S.,Fagundes, Fabio H. R.,Soares, Veronica C. G.,Aparicio, Ricardo,Toyama, Marcos H.
experimental part, p. 738 - 761 (2011/04/15)
In this work we have characterized the action of the naringin, a flavonoid found in grapefruit and known for its various pharmacological effects, which include antioxidant, blood lipid lowering and anticancer activity, on the structure and biochemical activities of a secretory phospholipase A (sPLA2) from Crotalus durissus cascavella, an important protein involved in the releasinge of arachidonic acid in phospholipid membranes. sPLA2 was incubated with naringin (mol:mol) at 37 °C and a discrete reduction in the UV scanning signal and a modification of the circular dichroism spectra were observed after treatment with naringin, suggesting modifications of the secondary structure of the protein. This flavonoid was able to decrease enzymatic activity and some pharmacological effects, such as myonecrosis, platelet aggregation, and neurotoxic activity caused by sPLA2, however, the inflammatory effect was not affected by naringin. In addition, small angle X-ray scattering (SAXS) data were collected for sPLA2 and naringin-treated sPLA2 to evaluate possible modifications of the protein structure. These structural investigations have shown that sPLA2 is an elongated dimer in solution and after treatment with naringin a conformational change in the dimeric configuration was observed. Our results suggest that structural modification may be correlated with the loss of enzymatic activity and alterations in pharmacological properties.
Sequencing of peptoid peptidomimetics by Edman degradation
Boeijen, Astrid,Liskamp, Rob M.J.
, p. 3589 - 3592 (2007/10/03)
The direct identification of resin-bound peptoid peptidomimetics by sequencing is described. The N-terminus of the peptoid was treated with phenyl isothiocyanate, after which the N-terminal peptoid residue was cleaved from the resin as its thiohydantoin derivative. For deduction of the peptoid sequence, the HPLC retention times of the obtained thiohydantoins were compared to those of independently prepared reference thiohydantoins.
PROTON MAGNETIC RESONANCE STUDY OF THE CONFORMATION OF THE PYRROLIDINE RING IN SOME PROLINE-THIOHYDANTOINS
Sleeckx, Jef J. M.,Anteunis, Marc J. O.,Borremans, Frans A. M.
, p. 2503 - 2510 (2007/10/02)
The conformational behaviour of a series of N-substituted thiohydantoins of proline was studied by proton NMR.The pseudorotational parameters of the proline moiety were calculated from the ten vicinal proton-proton coupling constants assuming a two state
