showed that compound 4g markedly inhibited the expression of pro‐inflammatory factors, including inducible nitricoxidesynthase (iNOS), interleukin‐6 (IL‐6), tumour necrosis factor‐&agr; (TNF‐&agr;), and cyclooxygenase‐2 (COX‐2) in LPS‐induced RAW 264.7 cells. These results indicate that derivatives bearing pyrazoline structure might be considered for further research and scaffold optimization in designing
图形抽象图。没有可用的字幕。亮点合成了新的孕5-烯D环吡唑啉衍生物家族。对所有合成化合物的结构进行了表征。对合成化合物的抗炎生物学活性进行了测定。化合物4g具有优异的抗炎活性和低细胞毒性。摘要 为了鉴定新的潜在抗炎剂,合成了许多具有氮杂环侧链 4a-4l 的新型甾体衍生物,并评估了它们在活化的 RAW 264.7 巨噬细胞中的抗炎作用。合成方案包括两个步骤,第一步是 Claisen-Schmidt 与相应的孕烯醇酮和芳香醛缩合,然后通过 &agr;, &bgr; 亲核加成氨基硫脲。-不饱和羰基作为后续步骤。化合物结构经 1H NMR、13C NMR、HRMS 和 IR 确认。分析这些化合物以测试它们在活化的 RAW 264.7 细胞中的抗炎作用。化合物 4g, 3&bgr;-hydroxy-pregn-5-en-17&bgr;-yl-5'-(m-fluorophenyl)-4', 5'-d
Pregnenolone derivatives as potential anticancer agents
Pregnenolone (1) was used as a template to develop new anticancer compounds. Ring-D modification of 1 resulted in the synthesis of benzylidenes 2-17, pyrazolines 18-76, pyrazoles 85-91, hydrazones 77-84, and oximes 92-107 derivatives. The structure of compound 107 was also deduced through single crystal X-ray diffraction studies. The inclusion of furanyl and pyridyl rings to pregnenolone skeleton increases the cytotoxicity of all compounds significantly. Among benzylidene derivatives, only heterocyclic enone 8 (IC50 = 0.74 mu M/mL against HepG2), and 17 (IC50 = 4.49 mu M/mL against HepG2, IC50 = 5.01 mu M/mL against MDA-MB-230 cancer cell line) exhibited a significant activity. The cytotoxicity data of pyrazoline derivatives 18-76 revealed that only furanyl bearing pyrazolines 40,42-44,48, and 49 exhibited significant activities. While all (O-carboxymethyl) oximes, hydazones, and pyrazoles derivatives of pregnenolone did not show any significant activity against both the cell lines. Thus the furanyl bearing enone 8 (IC50 = 0.74 mu M/mL against HepG2), and its pyrazoline derivative 48 (IC50 = 0.91 mu M/mL against MDA-MB-230 cancer cell lines) were identified as the most active compounds in all derivatives of pregnenolone. (C) 2011 Elsevier Inc. All rights reserved.