Efficient, collective synthesis and nitric oxide inhibitory activity of rubrolides E, F, R, S and their derivatives
作者:Kongara Damodar、Jin-Kyung Kim、Jong-Gab Jun
DOI:10.1016/j.tetlet.2016.11.096
日期:2017.1
tandem allylic hydroxylation/intramolecular cyclization and Knoevenagel condensation. Next, in their inhibitory activity towards nitric oxide (NO) production in lipopolysaccharide-induced RAW 264.7 macrophages as an indicator of anti-inflammatory activity, all compounds displayed good inhibitory activity in a concentration-dependent manner. None of the compound exhibited notable cytotoxicity at the highest
生物显著天然丁烯羟酸内酯的有效第一合成,rubrolides F(1F),R(1R),S(1秒)的7“,8”O-二脱氢衍生物(撒上)和3“ -溴rubrolide(1FA)连同从商业上可买到的便宜的前体以集体的方式完成了rubrolide E(1e)及其二-O-甲基衍生物(1ea)的合成,总收率为14-48.5%。关键特征是Wittig-Horner反应,SeO 2-诱导的串联烯丙基羟基化/分子内环化和Knoevenagel缩合。接着,在其朝向脂多糖诱导的RAW 264.7巨噬细胞的指标的一氧化氮(NO)产生的抑制活性的抗炎活性,所有的化合物以浓度依赖的方式显示出良好的抑制活性。在最高浓度(10μM)下,没有一种化合物显示出明显的细胞毒性,IC 50值在8.53至17.85μM的范围内。