完成了紫杉醇的对映选择性全合成。光学纯 A 环羟基醛与芳族 C 环片段的偶联反应,然后是路易斯酸介导的八元 B 环环化,得到所需的 ABC 内三碳环。该产物的 C 环部分在 Birch 条件下被还原为环己二烯衍生物,该衍生物被来自凸 β 面的单线态氧氧化,立体选择性地得到 C4β、C7β-二醇。为了引入C19-甲基,环丙基酮通过C-环烯丙醇的环丙烷化或氰基与C-环烯酮的共轭加成来制备。环丙烷环的还原裂解,然后将所得烯醇异构化为相应的酮,得到含有 C19-甲基的关键合成中间体。
A convenient synthesis of the paclitaxel side-chain via a diastereoselective Staudinger reaction
摘要:
The N-benzylidene derivative of (S)-(-)-1-(p-methoxyphenyl)propyl-1-amine, obtained by a new resolution procedure, exhibits moderate selectivity in the reaction with 2-acetoxyketene; the (S)-(-)-1-(p-methoxyphenyl)propyl group can be oxidatively cleaved from the resultant beta-lactam, an important precursor for taxane semi-synthesis. (C) 1998 Elsevier Science Ltd. All rights reserved.
Total Synthesis of Taxol. 1. Retrosynthesis, Degradation, and Reconstitution
作者:K. C. Nicolaou、P. G. Nantermet、H. Ueno、R. K. Guy、E. A. Couladouros、E. J. Sorensen
DOI:10.1021/ja00107a006
日期:1995.1
A successful strategy for the enantioselective synthesis of the natural stereoisomer of Taxol (1) has been developed. This strategy utilized the convergent assembly of Taxol's central eight-membered B ring from preformed synthons for rings A (10) and C (9) followed by late introduction of the D ring and side chain. Degradative studies conf i ied the viability of certain crucial manipulations including
已经开发了一种成功的策略,用于对映选择性合成紫杉醇 (1) 的天然立体异构体。该策略利用了来自环 A (10) 和 C (9) 的预制合成子的紫杉醇中央八元 B 环的会聚组装,随后引入了 D 环和侧链。降解研究证实了某些关键操作的可行性,包括 C13 位置的氧化 (35 3) 和区域选择性引入 C1-羟基、CZ苯甲酰氧基部分 (29 31)。此外,还开发了一种用于大规模生产 29(一种可用于 C2 模拟生产的衍生物)的便捷方法。
Taxol structure-activity relationships: Synthesis and biological evaluation of 2-deoxytaxol
作者:Shu-Hui Chen、Jian-Mei Wei、Vittorio Farina
DOI:10.1016/s0040-4039(00)73661-6
日期:1993.5
2-Deoxy taxol 2 was prepared in nine steps from baccatin III; the key step of the synthesis is a Barton-type deoxygenation at C-2. The compound was found to possess much reduced antitumor activity with respect to taxol.
作者:Yuzuru Kanda、Hugh Nakamura、Shigenobu Umemiya、Ravi Kumar Puthukanoori、Venkata Ramana Murthy Appala、Gopi Krishna Gaddamanugu、Bheema Rao Paraselli、Phil S. Baran
DOI:10.1021/jacs.0c03592
日期:2020.6.10
Taxol® is widely regarded as amongst the most famed natural isolates ever discovered, and has been the subject of innumerable studies in both basic and applied science. Its documented success as an anticanceragent, coupled with early concerns over supply, stimulated a furious worldwide effort from chemists to provide a solution for its preparation through total synthesis. Those pioneering studies
Novel chemistry of taxol. Retrosynthetic and synthetic studies
作者:K. C. Nicolaou、P. G. Nantermet、H. Ueno、R. K. Guy
DOI:10.1039/c39940000295
日期:——
10-Deacetyl baccatin III 2 was used in the synthesis of compounds 4–6 and 11–15, all of which were converted to Taxol 1via efficient synthetic pathways
PROCESS FOR PREPARING TAXOIDS FROM BACCATIN DERIVATIVES USING LEWIS ACID CATALYST
申请人:Kung Liang-Rern
公开号:US20120149925A1
公开(公告)日:2012-06-14
The present invention relates to a process of preparing a taxoid (X) by reacting a protected baccatin derivative (B) with a β-lactam (C) in the presence of one or more Lewis acids and a base agent. The present invention also relates to a process of preparing the protected baccatin derivative (B) from a baccatin derivative (A) comprising a protection reaction catalyzed by one or more Lewis acids with an optional base agent.