The synthesis of four cymantrene-5-fluorouracil derivatives (1–4) and two cymantrene-adenine derivatives (5 and 6) is reported. All of the compounds were characterized by spectroscopic methods and the crystal structure of two derivatives (1 and 6), together with the previously described cymantrene-adenine compound C was determined by X-ray crystallography. While the compounds 1 and 6 crystallized in the triclinic P-1 space group, compound C crystallized in the monoclinic P21/m space group. The newly synthesized compounds 1–6 were tested together with the two previously described cymantrene derivatives B and C for their in vitro antiproliferative activity against seven cancer cell lines (MCF-7, MCF-7/DX, MDA-MB-231, SKOV-3, A549, HepG2m and U-87-MG), five bacterial strains Staphylococcus aureus (methicillin-sensitive, methicillin-resistant and vancomycin-intermediate strains), Staphylococcus epidermidis, and Escherichia coli, including clinical isolates of S. aureus and S. epidermidis, as well as against the protozoan parasite Trypanosoma brucei. The most cytotoxic compounds were derivatives 2 and C for A549 and SKOV-3 cancer cell lines, respectively, with 50% growth inhibition (IC50) values of about 7 µM. The anticancer activity of the cymantrene compounds was determined to be due to their ability to induce oxidative stress and to trigger apoptosis and autophagy in cancer cells. Three derivatives (1, 4 and 5) displayed promising antitrypanosomal activity, with GI50 values in the low micromolar range (3–4 µM). The introduction of the 5-fluorouracil moiety in 1 enhanced the trypanocidal activity when compared to the activity previously reported for the corresponding uracil derivative. The antibacterial activity of cymantrene compounds 1 and C was within the range of 8–64 µg/mL and seemed to be the result of induced cell shrinking.
报告了四种环曼特-5-
氟尿
嘧啶衍
生物(1-4)和两种环曼特-
腺嘌呤衍
生物(5 和 6)的合成。所有化合物都通过光谱方法进行了表征,并通过 X 射线晶体学确定了两种衍
生物(1 和 6)以及之前描述的
氰基
腺嘌呤化合物 C 的晶体结构。化合物 1 和 6 的结晶为三linic
P-1 空间群,化合物 C 的结晶为单斜 P21/m 空间群。A549、HepG2m 和 U-87-MG)、五种细菌菌株
金黄色葡萄球菌(
甲氧西林敏感菌株、耐
甲氧西林菌株和
万古霉素中间菌株)、表皮葡萄球菌和大肠杆菌(包括临床分离的
金黄色葡萄球菌和表皮葡萄球菌)的体外抗增殖活性。
金黄色葡萄球菌和表皮葡萄球菌,以及原生动物布氏锥虫。细胞毒性最强的化合物是衍
生物 2 和 C,对 A549 和 SKOV-3 癌细胞株的生长抑制率(IC50)约为 7 µM。据测定,环曼化合物的抗癌活性是由于它们能够诱导
氧化应激,引发癌细胞凋亡和自噬。三种衍
生物(1、4 和 5)显示出良好的抗锥虫活性,其 GI50 值在较低的微摩尔范围内(3-4 µM)。与之前报道的相应尿
嘧啶衍
生物的活性相比,1 中引入的 5-
氟尿
嘧啶分子增强了杀锥虫活性。
氰基化合物 1 和 C 的抗菌活性在 8-64 µg/mL 范围内,似乎是诱导细胞收缩的结果。