Total Syntheses of Thailanstatins A–C, Spliceostatin D, and Analogues Thereof. Stereodivergent Synthesis of Tetrasubstituted Dihydro- and Tetrahydropyrans and Design, Synthesis, Biological Evaluation, and Discovery of Potent Antitumor Agents
作者:K. C. Nicolaou、Derek Rhoades、S. Mothish Kumar
DOI:10.1021/jacs.8b04634
日期:2018.7.5
hydrogenations of these dihydropyran systems afford their tetrahydropyran counterparts, also in a highly stereoselective manner. The synthesized thailanstatins and related analogues were biologically evaluated for their cytotoxic properties, leading to the identification of a number of compounds with exceptionally potent antitumor activities suitable for further development as potential antibody-drug conjugate
报道了剪接体调节天然产物泰兰他汀 AC 和剪接抑制素 D 的高效和选择性全合成。开发了许多用于构建各种四取代二氢和四氢吡喃的立体选择性方法,作为合成这些天然存在的分子及其变体的先决条件。吡喃形成反应利用 Heck/Saegusa-Ito 级联序列生成羟基 α,β,γ,δ-不饱和醛前体,然后通过催化剂控制的 oxa-Michael 环化提供具有高度立体控制的四取代二氢吡喃。随后对这些二氢吡喃系统进行优化的均相或非均相氢化,也以高度立体选择性的方式提供了它们的四氢吡喃对应物。合成的泰兰他汀和相关类似物对其细胞毒性特性进行了生物学评估,从而鉴定了许多具有异常有效抗肿瘤活性的化合物,适合进一步开发为潜在的抗体药物偶联物有效载荷、单一药物或用于癌症治疗的药物组合。讨论了泰兰他汀家族中重要的构效关系和结构相关的化合物,并有望成为未来研究的方向。
DERIVATIVES OF THAILANSTATIN A, METHODS OF TREATMENT AND METHODS OF SYNTHESIS THEREOF
申请人:WILLIAM MARSH RICE UNIVERSITY
公开号:US20200024283A1
公开(公告)日:2020-01-23
In one aspect, the present disclosure provides analogs of thailanstatin of the formula wherein the variables are as defined herein. In another aspect, the present disclosure also provides methods of preparing the compounds disclosed herein. In another aspect, the present disclosure also provides pharmaceutical compositions and methods of use of the compounds disclosed herein.
Efficient Synthesis of Rare Sugar <scp>d</scp>-Allal via Reversal of Diastereoselection in the Reduction of Protected 1,5-Anhydrohex-1-en-3-uloses: Protecting Group Dependence of the Stereoselection
作者:Takashi Fujiwara、Masahiko Hayashi
DOI:10.1021/jo801596q
日期:2008.11.21
loses using the NaBH4CeCl3 x 7 H2O system. The crucial point of this synthesis is the nature of the protectinggroup. When bulky silyl group such as t-butyldiphenylsilyl was used as substrate, protected D-allal was obtained in >99% selectivity. In contrast, when acetylated enone was used, protected D-glucal was obtained exclusively. The addition of CeCl3 x 7 H2O was also found to influence selectivity
D-alal是通过使用NaBH4CeCl3 x 7 H2O系统还原大体积的甲硅烷基保护的1,5-脱水己基-1-en-3-uloses选择性获得的。该合成的关键点是保护基团的性质。当使用大体积的甲硅烷基如叔丁基二苯基甲硅烷基作为底物时,以> 99%的选择性获得了受保护的D-alal。相反,当使用乙酰化的烯酮时,仅获得保护的D-葡萄糖。还发现添加CeCl3 x 7 H2O会影响选择性。
THAILANSTATIN ANALOGS
申请人:pH Pharma Co., Ltd.
公开号:US20190084996A1
公开(公告)日:2019-03-21
The invention provides novel cytotoxic compounds and cytotoxic conjugates comprising these cytotoxic compounds and cell-binding agents. More specifically, this invention relates to novel thailanstatin A analogs, useful as cytotoxic small molecule toxins in antibody-drug conjugates (ADCs). The present invention further relates to compositions including these cytotoxic compounds and ADCs, and methods for using these toxins and ADCs to treat pathological conditions including cancer.
Cesium Carbonate–Promoted Michael‐Type Addition of Thiols to Hex‐1‐en‐3‐ulose: A Practical Synthesis of 2‐Deoxy‐1‐thio‐α‐hexopyranosid‐3‐ulose Template
作者:Debashis Ganguly、Haiqun Tang、Michael J. Rodriguez
DOI:10.1080/00397910701575129
日期:2007.12
The template 2-deoxy-1-thio-alpha-hexopyranosid-3-ulose was synthesized in quantitative yield and high diastereoselectivity by 1,4-addition of aryl and alkyl thiols to hex-1-en-3-ulose promoted by cesium carbonate in THE