Design, synthesis and crystal structure determination of dinuclear copper-based potential chemotherapeutic drug entities; in vitro DNA binding, cleavage studies and an evaluation of genotoxicity by micronucleus test and comet assay
摘要:
设计、合成了铜基潜在化疗复合物 1 和 2,并评估了其体外 DNA 结合、切割能力和体内遗传毒性。使用元素和光谱数据对配合物的结构进行了阐明,同时通过单晶衍射研究了 Cu(II) 配合物 1 的 (R)-对映体。对复合物 1 和 2 的 (R)- 和 (S)- 对映体进行了体外 DNA 结合分析,以评估它们的对映选择性,在与 DNA 的相互作用中表现出显着程度的对映选择性,其中 (R)-对映体表现出更大的DNA结合倾向。通过琼脂糖凝胶电泳测定评估复合物与pBR322 DNA之间的相互作用;两种 (R)-对映体复合物均表现出有效的 DNA 裂解并通过氧化途径进行。此外,通过骨髓细胞微核测试和外周血淋巴细胞彗星试验评估了复合物1的(R)-对映体的体内遗传毒性。这些结果支持了我们的论点,即复合物 1 的 (R)-对映体是一种合适的候选化疗药物,与顺铂和抗氧化剂 (EVOO) 相比,对正常细胞的毒性作用降低。
Design of a Genetic Algorithm for the Simulated Evolution of a Library of Asymmetric Transfer Hydrogenation Catalysts
作者:Nicolas Vriamont、Bernadette Govaerts、Pierre Grenouillet、Claude de Bellefon、Olivier Riant
DOI:10.1002/chem.200802192
日期:2009.6.15
Breeding newcatalysts: A library of 1980 catalysts was designed for asymmetrichydrogentransfer to acetophenone. The library was submitted to evaluation and further simulated evolution experiments, based on a genetic algorithm (see scheme). We demonstrated that it was easily possible to get 5–6 of the ten best catalysts, while investigating only 10% of the library.
Synthesis of new tridentate chiral aminoalcohols by a multicomponent reaction and their evaluation as ligands for catalytic asymmetric Strecker reaction
Mannich-type reaction between phenols, paraformaldehyde, and β-aminoalcohols in the presence of LiCl afforded N-2-hydroxybenzyloxazolidines with high ortho-selectivity. Hydrolytic or reductive ring opening of the oxazolidines provided a series of N-salicyl-β-aminoalcohols in 84–92% overall yield. The synthesized compounds were evaluated as ligands for a titanium-catalyzed catalytic asymmetricStrecker reaction
[EN] TITANIUM COMPOUNDS AND PROCESS FOR CYANATION OF IMINES<br/>[FR] COMPOSÉS DE TITANE ET PROCÉDÉ DE CYANATION DES IMINES
申请人:AGENCY SCIENCE TECH & RES
公开号:WO2010093327A1
公开(公告)日:2010-08-19
The present invention relates to titanium catalysts for synthesis reactions produced by bringing a reaction mixture comprising a titanium alkoxide and a ligand in contact with water, wherein the ligand is represented by the general formula (e), wherein R1, R2, R3, and R4 are independently a hydrogen atom, an alkyl group, or the like, and (A) represents a group with two or more carbon atoms. The titanium catalysts may be isolated in solid form and may be stored. The invention further relates to a process for cyanation of imines, wherein the process comprises reacting an imine with a cyanating agent in the presence of the titanium catalyst.
Design, synthesis and crystal structure determination of dinuclear copper-based potential chemotherapeutic drug entities; in vitro DNA binding, cleavage studies and an evaluation of genotoxicity by micronucleus test and comet assay
作者:Farukh Arjmand、Mohd Muddassir、Yusra Zaidi、Debashis Ray
DOI:10.1039/c2md20141k
日期:——
Copper-based potential chemotherapeutic complexes 1 and 2 were designed, synthesized and evaluated for in vitro DNA binding, cleaving capability and in vivo genotoxicity. The structural elucidation of complexes was done using elemental and spectroscopic data while the (R)-enantiomer of Cu(II) complex 1 was studied by single crystal diffraction. In vitro DNA binding profiling of both (R)- and (S)-enantiomers of complexes 1 and 2 was carried out to evaluate their enantioselectivity, exhibiting a remarkable degree of enantioselectivity in their interaction with DNA, with the (R)-enantiomer exhibiting greater DNA binding propensity. Interaction between complexes and pBR322 DNA was evaluated by agarose gel electrophoresis assay; both the (R)-enantiomeric complexes exhibit effective DNA cleavage and proceed via an oxidative pathway. Furthermore, the in vivo genotoxicity of the (R)-enantiomer of complex 1 was evaluated by micronucleus testing on bone marrow cells and comet assay in peripheral blood lymphocytes. These results support our contention that the (R)-enantiomer of complex 1 is a suitable chemotherapeutic drug candidate showing reduced toxic effects on normal cells as compared to cisplatin and an antioxidant (EVOO).
设计、合成了铜基潜在化疗复合物 1 和 2,并评估了其体外 DNA 结合、切割能力和体内遗传毒性。使用元素和光谱数据对配合物的结构进行了阐明,同时通过单晶衍射研究了 Cu(II) 配合物 1 的 (R)-对映体。对复合物 1 和 2 的 (R)- 和 (S)- 对映体进行了体外 DNA 结合分析,以评估它们的对映选择性,在与 DNA 的相互作用中表现出显着程度的对映选择性,其中 (R)-对映体表现出更大的DNA结合倾向。通过琼脂糖凝胶电泳测定评估复合物与pBR322 DNA之间的相互作用;两种 (R)-对映体复合物均表现出有效的 DNA 裂解并通过氧化途径进行。此外,通过骨髓细胞微核测试和外周血淋巴细胞彗星试验评估了复合物1的(R)-对映体的体内遗传毒性。这些结果支持了我们的论点,即复合物 1 的 (R)-对映体是一种合适的候选化疗药物,与顺铂和抗氧化剂 (EVOO) 相比,对正常细胞的毒性作用降低。
TITANIUM COMPOUND AND PROCESS FOR ASYMMETRIC CYANATION OF IMINES
申请人:Seayad Abdul Majeed
公开号:US20100185000A1
公开(公告)日:2010-07-22
The present invention relates to titanium catalysts for asymmetric synthesis reactions produced by bringing a reaction mixture obtained by contacting water and a titanium alkoxide into contact with an optically active ligand represented by the general formula (a), wherein R
1
, R
2
, R
3
, and R
4
are independently a hydrogen atom, an alkyl group, or the like, and A* represents a group with two or more carbon atoms having an asymmetric carbon atom or axial asymmetry. The invention further relates to a process for asymmetric cyanation of imines, wherein the process comprises reacting an imine with a cyanating agent in the presence of the titanium catalyst.