Antitumor Agents. Part 184. Syntheses and antitubulin activity of compounds derived from reaction of thiocolchicone with amines: Lactams, alcohols, and ester analogs of allothiocolchicinoids
作者:Qian Shi、Ke Chen、Arnold Brossi、Pascal Verdier-Pinard、Ernest Hamel、Andrew T. McPhail、Kuo-Hsiung Lee
DOI:10.1002/hlca.19980810516
日期:——
chemical resolution including a separation of the comphanate diastereoisomers 12a and 12b, followed by basic hydrolysis. The (aR,7R)-configuration of 12b was verified by X-ray crystallographic analysis. Almost all racemic and optically active 7-O-acyl or 7-O-aroyl compounds had strong inhibitory effects on the tubulin polymerization reaction, with IC50 values from 1.7 to 5.1 μM. A few agents, such as the
合成了7- O-取代的脱氨基脱氧胆甾醇硫代甲基醚类似物,并评价了其对体外微管蛋白聚合的抑制作用。酮9是这项研究中的关键化合物,它是通过与苯胺反应而从噻吩酮6衍生而来的。化合物6与MeNH 2或BuNH 2的反应分别得到四环内酰胺7和8。旋光醇11a和11b是由外消旋体11通过化学拆分而获得的,包括分离出甲酸酯非对映异构体12a。和12b,然后进行碱性水解。通过X射线晶体学分析证实了12b的(a R,7 R)-构型。几乎所有外消旋和旋光的7- O-酰基或7- O-芳酰基化合物均对微管蛋白聚合反应具有强烈的抑制作用,IC 50值为1.7至5.1μM。一些试剂,例如内酰胺7和8,樟脑酸酯12a和12b,环己烷羧酸酯19a和19b,最值得注意的是(7 S)-苯甲酸酯15a,对聚合的影响可忽略不计,产生的IC 50值大于40μM。酮9表现出对微管蛋白聚合的强烈抑制作用,其程度可与硫代秋水仙烯(6)相