practical method for the straightforward construction of unsymmetrical selenoureas and cycloselenoureas via the combination of selenium powder, chloroform, and two different amines was comprehensively achieved in one-pot with only the assistance of a base under mild conditions. Thirty-three new structures of unsymmetrical selenoureas including three chiral examples and eight cycloselenoureas were achieved
Synthesis, structural characterization and cytotoxicity evaluation of platinum(II) complexes of heterocyclic selenones
作者:Ali Osman S. Altoum、Ján Vančo、Radka Křikavová、Zdeněk Trávníček、Zdeněk Dvořák、Muhammad Altaf、Saeed Ahmad、Adam A.A. Sulaiman、Anvarhusein A. Isab
DOI:10.1016/j.poly.2017.02.027
日期:2017.5
complexes (1–6) with selenones (HLn), having the general formula [Pt(HLn)4]Cl2, were prepared and characterized by elemental analysis, IR and NMR (1H, 13C, 77Se and 195Pt) methods and one of them, [Pt(N-ethylimidazolidine-2-selenone)4]Cl2 (3) by X-ray crystallography. A decrease in the IR frequency of the >C Se mode and an upfield shift in 13C NMR for the >C Se resonance of selenones are consistent with
摘要制备了具有[Pt(HLn)4] Cl2通式的硒酮(HLn)的铂(II)配合物(1-6),并通过元素分析,IR和NMR(1H,13C,77Se和195Pt)进行了表征方法和其中之一,[Pt(N-乙基咪唑烷-2-硒酮)4] Cl2(3)通过X射线晶体学测定。硒酮的> C Se共振,> C Se模式的IR频率降低和13C NMR的高场频移与硒与铂(II)的配位相一致。3的结构由[Pt(L3)4] 2+复合离子和氯离子构成。复杂阳离子中的铂(II)原子采用扭曲的正方形平面几何形状。通过MTT分析评估了复合物以及顺铂在体外对人卵巢癌A2780及其耐顺铂亚系A2780R的体外抗肿瘤活性,人前列腺癌22Rv1和人乳腺腺癌MCF-7细胞株。结果表明,只有一种涉及N-丙基咪唑烷-2-硒酮(4)配体的复合物对A2780细胞(IC50 = 44.7 µM)有效,其水平与顺铂(IC50 = 26.8 µM)相
Solution and solid-state NMR studies of some cadmium–selenone complexes
作者:Mohammed I.M. Wazeer、Anvarhusein A. Isab
DOI:10.1016/j.saa.2005.03.020
日期:2005.12
nucleus in Cd(ImSe)2Cl2 is shielded by 38 ppm on coordination, relative to the free ligand. The principal components of the 77Se, 113Cd and 13C shielding tensors for the complexes were determined from solid-state NMR data. Large selenium chemical shift anisotropies were observed for these complexes.
Synthesis and characterization of mercury(II) complexes of selones: X-ray structures, CP MAS and solution NMR studies
作者:Anvarhusein A. Isab、Mohammed I.M. Wazeer、Mohammed Fettouhi、Saeed Ahmad、Waqar Ashraf
DOI:10.1016/j.poly.2006.03.022
日期:2006.9
Mercury(II) complexes of selones (L) having the general formulae, [L2HgCl2], [L3HgCl]Cl and [L4Hg]Cl2 have been prepared and characterized by elemental analysis, IR and NMR (1H, 13C, 15N, 77Se, 199Hg) spectroscopy. A decrease in the IR frequency of the CSe mode upon complexation is indicative of mercury(II) binding via a selone group. Upfield shifts in CSe resonance of selones in 13C and 77Se NMR and
Synthesis of Novel 10-Se-3 Type Selenatetraazapentalene Derivatives with a Hypervalent Selenium
作者:Noboru Matsumura、Masaaki Tomura、Shigeo Yoneda
DOI:10.1246/bcsj.62.2419
日期:1989.7
Novel selenatetraazapentalene derivatives, 2,3-disubstituted 6,7-dihydro-5H-2a-selena(2a-SeIV)-2,3,4a,7a-tetraazacyclopent[cd]indene-1,4(2H,3H)-dithione, were synthesized by a convenient one-pot reaction using the lithium selenoureide/phenacyl chloride/alkyl isothiocyanate system in good yields.