1025836-01-4Relevant academic research and scientific papers
Synthesis of new 3-substituted-5-(2-hydroxyethyl)-3,4,5,6-tetrahydro-2H-l, 3,5-thiadiazine-2-thione derivatives with potential antimicrobial activity
Hussein, Mostafa A.,Hashem, Mohammed
experimental part, p. 370 - 376 (2009/04/21)
The purpose of this study is based upon design and synthesis of a new series of flexible molecules of 3,4,5,6-tetrahydro-2H-1,3,5-thiadiazine-2-thione (THTT) derivatives depending upon incorporation of 2-aminoethanol as a part of the polar moiety in this nucleus. Thirteen derivatives of 3-substituted-5-(2- hydroxyethyl)-3,4,5,6-tetrahydro-2H-1,3,5-thiadiazine-2-thione were synthesized by reaction of the appropriate alkyl, cycloalkyl, aralkyl amine, or glycine with carbon disulphide, formaldehyde, and 2-aminoethanol. The structures of the target compounds were elucidated using spectral methods as well as elemental analyses. A mass-spectrometry study was carried out on representatives of the synthesized derivatives. The title compounds were tested for their antibacterial activity in vitro against some gram positive and gram negative bacteria. The in-vitro antifungal activity was tested against dermatophytic, saprophytic, phytopathogenic, and antagonistic fungi. In most cases, the newly synthesized compounds 4-16 exhibited a considerable inhibitory effect on the growth of some of the tested organisms in comparison to that of ampicillin or muconazole as reference drugs. Moreover, the results indicated that the polar hydroxyethyl group at the N5- and the lipophilic one at the N3-positions are essential for the antimicrobial activity of the tested compounds.
New 2H-tetrahydro-1,3,5-thiadiazine-2-thiones incorporating glycine and glycinamide as potential antifungal agents
Aboul-Fadl, Tarek,Hussein, Mostafa A.,El-Shorbagi, Abdel-Nasser,Khallil, Abdel-Raouf
, p. 438 - 442 (2007/10/03)
The new title derivatives (4 b-h and 5 a-i) were synthesized by reaction of the appropriate primary amine, carbon disulphide, and formaldehyde. These derivatives were prepared in order to study the effects of introducing polar groups at N3 or N5 or at both positions on the biological activity. The compounds were tested for their antifungal activity in vitro against pathogenic (Trichophyton rubrum and Candida albicans), phytopathogenic (Penicillum expansum, Trichoderma hazianum, and Fasarium oxysporum), and aflatoxin-producing (Aspergillus flavus) fungi. These compounds exhibited varied inhibitory effects on growth or sporulation of some tested fungal species.
New carriers for representative peptides and peptide drugs
Aboul-Fadl, Tarek,El-Shorbagi, Abdel-Nasser
, p. 327 - 332 (2007/10/03)
3,5-Disubstituted tetrahydro-2H-1,3,5-thiadiazine-2-thione (THTT) derivatives; 4a-g were prepared and found to be a promising prodrug approach for peptide drugs. The pH profile for their degradation in aqueous buffer solutions was determined using HPLC technique and accounted for, in terms of specific base-catalyzed reactions. All of the compounds however, showed high acid-stability. Enzymatic (human serum) hydrolysis of the different derivatives offered an advantageous range of t( 1/4 )'s, the property that permits controlling onset and duration of actions of drugs.
New prodrug approach for amino acids and amino-acid-like drugs
Aboul-Fadl,El-Shorbagi
, p. 165 - 169 (2007/10/03)
A series of disubstituted tetrahydro-2H-1,3,5-thiadiazine-2-thione (THTT) derivatives 4a-g were prepared and found to be promising prodrugs for amino acids and similar compounds. The pH profile for the degradation of the THTT derivatives in aqueous buffer solutions was determined using HPLC and was accounted for in terms of specific base-catalyzed reactions. The compounds, however, showed high acid stability. Enzymatic hydrolysis (human serum) of the derivatives offered an advantageous range of t( 1/2 ) values, which may be useful in controlling the onset and the duration of action of drugs.
