Synthesis and Cytostatic Evaluation of 4-<i>N</i>-Alkanoyl and 4-<i>N-</i>Alkyl Gemcitabine Analogues
作者:Jesse Pulido、Adam J. Sobczak、Jan Balzarini、Stanislaw F. Wnuk
DOI:10.1021/jm401586a
日期:2014.1.9
4-N-alkanoylgemcitabine analogues was reduced approximately by 2 orders of magnitude in the 2′-deoxycytidine kinase (dCK)-deficient CEM/dCK– cell line, whereas cytotoxicity of the 4-N-alkylgemcitabines was only 2–5 times lower. None of the compounds acted as efficient substrates for cytosolic dCK; therefore, the 4-N-alkanoyl analogues need to be converted first to gemcitabine to display a significant cytostatic potential
吉西他滨与官能羧酸(C9-C13)或4-反应的耦合Ñ -tosylgemcitabine与相应的,得到的烷基胺4- ñ -烷酰基和4- Ñ烷基吉西他滨衍生物。在与18 F 标记方案兼容的条件下,烷基链上具有末端羟基的类似物被有效氟化。4- N-烷酰基吉西他滨在低纳摩尔范围内对一组肿瘤细胞系显示出有效的细胞抑制活性,而4- N-烷基吉西他滨的细胞毒性在低微摩尔范围内。4- N的细胞毒性-烷酰基吉西他滨类似物在 2'-脱氧胞苷激酶 (dCK) 缺陷型 CEM/dCK -细胞系中降低了大约 2 个数量级,而 4- N -烷基吉西他滨的细胞毒性仅低 2-5 倍。这些化合物都不能作为细胞溶质 dCK 的有效底物;因此,4- N-烷酰基类似物需要首先转化为吉西他滨以显示显着的细胞抑制潜力,而4- N-烷基衍生物获得适度的活性而没有可测量的转化为吉西他滨。