作者:K.L. Mikolajczak、C.R. Smith、R.G. Powell
DOI:10.1002/jps.2600630825
日期:1974.8
analogs of harringtonine (II), an ester alkaloid which is active in the P-388 experimental leukemia system, were prepared by acylating cephalotaxine (I). They were the 2-hydroxy-2-methylbutyryl (III), 2-carbomethoxymethyl-5-methylhexanoyl (IXc, and 2-carbomethoxymethylene-5-methylhexanoyl VIId) esters of I. A special sequence was developed for the synthesis of III. All of these harringtonine analogs,
通过酰化头孢他辛(I),制备了harringtonine(II)的三个类似物,这是一种在P-388实验性白血病系统中具有活性的酯类生物碱。它们是I的2-羟基-2-甲基丁酰基(III),2-羰基甲氧基甲基-5-甲基己酰基(IXc和2-羰基甲氧基亚甲基-5-甲基己酰基VIId)酯。开发了用于合成III的特殊序列。除III以外,所有这些harringtonine类似物在P-388系统中均不起作用。另外,提供的数据表明重排的harringtonine异构体(X)也没有活性。这些结果强调了对头孢类生物碱的抗肿瘤活性的一些高度特定的结构要求。