Antitumor agents. 141. Synthesis and biological evaluation of novel thiocolchicine analogs: N-acyl, N-aroyl-, and N-(substituted benzyl)deacetylthiocolchicines as potent cytotoxic and antimitotic compounds
作者:Li Sun、Ernest Hamel、Chii M. Lin、Susan B. Hastie、Amy Pyluck、Kuo Hsiung Lee
DOI:10.1021/jm00062a021
日期:1993.5
rotations. However, comparison of 1H NMR and UV spectral data of N-(substituted benzyl)-deacetylthiocolchicines with those of corresponding N-aroyldeacetylthiocolchicines suggested a different biaryl dihedral angle [even though these compounds have the same aS biaryl configuration]. The similar tubulin binding properties of these compounds suggest that a biaryl dihedral angle of 53 degrees is not essential
合成了三个新的硫代秋水仙碱类似物系列,N-酰基-,N-芳酰基-和N-(取代的苄基)-去乙酰基硫代秋水仙碱类,并评估了它们对各种肿瘤细胞系,特别是实体肿瘤细胞系的细胞毒性,以及它们的毒性。体外对微管蛋白聚合的抑制作用。这些化合物中的大多数对微管蛋白的聚合均显示出强大的抑制作用,可与硫代秋水仙碱相比,但大于秋水仙碱。只有在C(7)位置具有长侧链的化合物,例如22-24,才不会抑制微管蛋白聚合。与大多数类秋水仙碱类药物观察到的负旋光度相反,几种活性N-芳酰基脱乙酰基硫代秋水仙碱类似物具有正旋光度。该性质可能归因于联芳构型从正常的aS逆转为aR。因此,通过圆二色性进一步评估了N-芳酰基类似物,该二色性容易区分aS和aR联芳基构型。后一种技术证明了活性N-芳酰基类似物确实具有aS构型,尽管它们具有正旋光度。然而,N-(取代的苄基)-脱乙酰基硫代秋水仙碱与相应的N-芳酰基-脱乙酰基硫代秋水仙碱的1 H