Stereocontrolled Total Synthesis of (+)-Altohyrtin A/Spongistatin 1 Financial support was provided by the EPSRC (GR/L41646), Cambridge Commonwealth Trust (Scholarship to M.J.C.), EC (Marie Curie Postdoctoral Fellowship to J.L.A.), DFG (Postdoctoral Fellowship to T.T.), NSERC-Canada (Postdoctoral Fellowship to R.M.O.), Churchill College (Research Fellowship to D.J.W.), Kingapos;s College and Sims Fund, Cambridge (Scholarship to D.Y.K.C.). We also thank Merck and AstraZeneca Pharmaceuticals for generous support, and Dr. Anne Butlin (AZ) and Dr. Nick Bampos (Cambridge) for valuable assistance.
作者:Ian Paterson、David Y.-K. Chen、Mark J. Coster、Jose L. Aceña、Jordi Bach、Karl R. Gibson、Linda E. Keown、Renata M. Oballa、Thomas Trieselmann、Debra J. Wallace、Andrew P. Hodgson、Roger D. Norcross
antimitotic macrolide, altohyrtin A/spongistatin1 shows great promise in cancer chemotherapy but its extreme scarcity in the natural sponges has halted its further preclinical development. A highly stereocontrolled totalsynthesis, which exploits boron-mediated aldol bond constructions, has been realized to provide, for the first time, a useful amount of synthetic material.
作为一种异常有效的抗有丝分裂大环内酯,altohyrtin A / spongistatin 1在癌症化学疗法中显示出广阔的前景,但其天然海绵中的极度稀缺性阻止了其进一步的临床前开发。已经实现了利用硼介导的羟醛键结构的高度立体控制的全合成,首次提供了有用量的合成材料。
The stereocontrolled total synthesis of altohyrtin A/spongistatin 1: the southern hemisphere EF segment
作者:Ian Paterson、Mark J. Coster、David Y.-K. Chen、José L. Aceña、Jordi Bach、Linda E. Keown、Thomas Trieselmann
DOI:10.1039/b504149j
日期:——
The fully functionalised C29-C51 southern hemisphere of altohyrtin A/spongistatin1 , incorporating the E- and F-ring tetrahydropyran rings and the unsaturated side chain, has been synthesised in a highly convergent and stereocontrolled manner. Key steps in the synthesis of this phosphonium salt include four highly diastereoselective, substrate-controlled, boron aldol reactions to establish key C-C
高度融合和立体控制的方式合成了功能完备的altohyrtin A /海绵抑素1的C29-C51南半球,其中包含E和F环四氢吡喃环和不饱和侧链。合成该salt盐的关键步骤包括四个高度非对映选择性,受底物控制的硼醇醛缩醛反应,以建立关键的CC键和相应的立体中心,其中通过利用远程异构体实现引入氯二烯侧链和带有C47羟基的中心。 F环四氢吡喃的立体诱导。
Studies Towards the Synthesis of the C29-C51 Fragment of Altohyrtin A
作者:Eduardo Fernandez-Megia、Nelly Gourlaouen、Steven V. Ley、Gareth J. Rowlands
DOI:10.1055/s-1998-3140
日期:1998.9
The synthesis of the highly substituted E and F pyran fragment 23 of altohyrtin A 1 from tri-O-benzyl-d-glucal 5 is described. The synthesis of a model compound 31 containing the altohyrtin A triene side-chain outlines the proposed strategy for the elaboration of the F pyran.
本文介绍了从三-O-苄基-d-葡萄糖醛 5 中合成高度取代的阿尔托黄素 A 1 的 E 和 F 吡喃片段 23 的过程。含有阿托菌素 A 三烯侧链的模型化合物 31 的合成概述了拟议的 F 吡喃化合物的合成策略。
Total Synthesis of (+)-Spongistatin 1. An Effective Second-Generation Construction of an Advanced EF Wittig Salt, Fragment Union, and Final Elaboration
作者:Amos B. Smith、Wenyu Zhu、Shohei Shirakami、Chris Sfouggatakis、Victoria A. Doughty、Clay S. Bennett、Yasuharu Sakamoto
DOI:10.1021/ol034037a
日期:2003.3.1
A stereocontrolled, total synthesis of (+)-spongistatin 1 (1) has been achieved. Union of a second-generation EF Wittig salt (+)-3 with the advanced ABCD aldehyde (-)-4, followed by regioselective macrolactonization and global deprotection afforded (+)-spongistatin 1 (1). The longest linear sequence, 29 steps, proceeded in 0.5% overall yield.