PROCESS FOR THE PREPARATION OF DOCETAXEL, ITS INTERMEDIATES, AND METHODS FOR PREPARATION THEREOF
申请人:Shen Xin
公开号:US20100311991A1
公开(公告)日:2010-12-09
The present invention disclosed an process for preparing docetaxel 1, including the following steps: a) hydroxyl acylation reaction of compound 2 and 3 to obtain compound 4; b) deprotection group R
1
of the hydroxyl group of compound 4 obtained from step a to prepare compound 5; c) removing one tert-butoxycarbonyl of compound 5 obtained from step b to prepare compound 6; d) removing one acetyl of compound 6 obtained from step c to prepare compound 1; wherein, R
1
represents tert-butyl dimethyl silyl, triethylsilyl, ethoxyethyl, tetrahydropyranyl, trichloroethoxycarbonyl or methoxymethyl, Boc is tert-butoxycarbonyl, Ac is acetyl, and Ph is phenyl. The present invention also disclosed intermediates of docetaxel and methods for preparation thereof. In the methods for preparation of the present invention, the protective groups used are easy to be removed, the purification of the intermediates is easy, the cost is lower, the yield and the purity are higher, and the processes can be scaled to commercial implementation.
本发明揭示了一种制备紫杉醇1的方法,包括以下步骤:a)将化合物2和3进行羟基酰化反应以获得化合物4;b)去保护羟基群R1,其中R1代表叔丁基二甲基硅基、三乙基硅基、乙氧基乙基、四氢吡喃基、三氯乙氧羰基或甲氧基甲基,得到步骤a中获得的化合物4以制备化合物5;c)去除化合物5中从步骤b获得的一个叔丁氧羰基以制备化合物6;d)去除从步骤c获得的化合物6中的一个乙酰基以制备化合物1;其中,Boc代表叔丁氧羰基,Ac代表乙酰基,Ph代表苯基。本发明还揭示了紫杉醇的中间体及其制备方法。在本发明的制备方法中,所使用的保护基易于去除,中间体的纯化容易,成本较低,产率和纯度较高,并且这些过程可以扩展到商业实施。