2-debenzoyl-7-(triethylsilyl)-13-oxobaccatin III | 185850-74-2

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 2-debenzoyl-7-(triethylsilyl)-13-oxobaccatin III
• 英文别名: [(1S,2S,3R,4S,7R,9S,10S,12R)-4-acetyloxy-1,2-dihydroxy-10,14,17,17-tetramethyl-11,15-dioxo-9-triethylsilyloxy-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-12-yl] acetate
• CAS: 185850-74-2
• 化学式: C₃₀H₄₆O₁₀Si
• 分子量: 594.775
• InChiKey: DGOFCEMRLFPMLH-WIOBJEFVSA-N

物化性质

• 沸点：
  634.4±55.0 °C(Predicted)
• 密度：
  1.23±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.03
• 重原子数：
  41
• 可旋转键数：
  9
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  146
• 氢给体数：
  2
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  2-debenzoyl-7-(triethylsilyl)-13-oxobaccatin III 在 吡啶 、 4-二甲氨基吡啶 、 sodium tetrahydroborate 、 氢氟酸 、 sodium hexamethyldisilazane 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 10.0h， 生成 2-debenzoyl,2-acetoxy paclitaxel
  参考文献：
  名称：

  Structure–activity relationship study of taxoids for their ability to activate murine macrophages as well as inhibit the growth of macrophage-like cells

  摘要：

  A series of new taxoids modified at the C-3', C-3'N, C-10, C-2 and C-7 positions has been designed, synthesized and evaluated for their potency to induce NO and TNF production by peritoneal murine macrophages (Mphi) from LPS-responsive C3H/HeN and LPS-hyporesponsive C3H/HeJ strains and human blood cells, and for their ability to inhibit the growth of Mphi-like cell lines J774.1 and J7.DEF3. The SAR-study has shown that the nature of the substituents at these positions have critical effect on the induction of TNF and NO production by Mphi. Positions G-3' and C-10 are the most flexible and an intriguing effect of the length of the substituents at the C-10 position is observed for taxoids bearing a straight chain alkanoyl moiety. An aromatic group at the C-3'N and C-2 positions is required for the activity, while only hydroxyl or acetyl substituents seem to be tolerated at the C-7 position. The natural stereochemistry in the C-13 isoserine side chain of the taxoids is an absolute requirement for macrophage activation. It has also been clearly shown that there is no correlation between the ability of the taxoids to induce TNF/NO production in C3H/HeN M and the cytotoxicity against Mphi-like cells. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0968-0896(03)00181-0
• 作为产物：
  描述：

  10-脱乙酰基巴卡丁 III 在 吡啶 、 4-二甲氨基吡啶 、 四丙基高钌酸铵 、 4 A molecular sieve 、 potassium carbonate 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 环己烷 、 甲苯 为溶剂， 反应 40.0h， 生成 2-debenzoyl-7-(triethylsilyl)-13-oxobaccatin III
  参考文献：
  名称：

  紫杉醇的全合成。1. 逆合成、降解和重组

  摘要：

  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。

  DOI：

  10.1021/ja00107a006

文献信息

• Macrocycle Formation by Ring-Closing Metathesis. Application to the Syntheses of Novel Macrocyclic Taxoids
  作者：Iwao Ojima、Songnian Lin、Tadashi Inoue、Michael L. Miller、Christopher P. Borella、Xudong Geng、John J. Walsh

  DOI：10.1021/ja000293w

  日期：2000.6.1

  synthesized. The syntheses of these macrocycles 6 and 6‘ were accomplished using the highly efficient ruthenium-catalyzed ring-closing metathesis (RCM) of taxoid-ω,ω‘-dienes 7 in the key step. Taxoid-ω,ω‘-dienes 7 were obtained through the ring-opening coupling of 4-alkenyl-β-lactams 9 with 2-alkenoylbaccatins 8 in good to high yields. Although various novel pentacyclic macrocycles 6 and 6‘ were successfully

  设计并合成了一系列新的大环紫杉类化合物 6 和 6'，带有连接 C-2 和 C-3' 位置的取代基的 16、17 和 18 元环。这些大环 6 和 6' 的合成是在关键步骤中使用紫杉醇-ω,ω'-二烯 7 的高效钌催化闭环复分解 (RCM) 完成的。通过 4-链烯基-β-内酰胺 9 与 2-链烯酰基浆果赤霉素 8 的开环偶联，以良好到高产率获得紫杉素-ω,ω'-二烯 7。尽管成功合成了各种新型五环大环 6 和 6'，但在某些情况下无法进行所需的 RCM。讨论了 RCM 在其应用于高度功能化的复杂基材的范围和限制。发现所有大环紫杉类化合物 6 和 6' 都具有细胞毒性，
• A structure-based design of new C2- and C13-substituted taxanes: tubulin binding affinities and extended quantitative structure–activity relationships using comparative binding energy (COMBINE) analysis
  作者：Claire Coderch、Yong Tang、Javier Klett、Shu-En Zhang、Yun-Tao Ma、Wang Shaorong、Ruth Matesanz、Benet Pera、Angeles Canales、Jesús Jiménez-Barbero、Antonio Morreale、J. Fernando Díaz、Wei-Shuo Fang、Federico Gago

  DOI：10.1039/c3ob40407b

  日期：——

  Ten novel taxanes bearing modifications at the C2 and C13 positions of the baccatin core have been synthesized and their binding affinities for mammalian tubulin have been experimentally measured. The design strategy was guided by (i) calculation of interaction energy maps with carbon, nitrogen and oxygen probes within the taxane-binding site of β-tubulin, and (ii) the prospective use of a structure-based QSAR (COMBINE) model derived from an earlier series comprising 47 congeneric taxanes. The tubulin-binding affinity displayed by one of the new compounds (CTX63) proved to be higher than that of docetaxel, and an updated COMBINE model provided a good correlation between the experimental binding free energies and a set of weighted residue-based ligand–receptor interaction energies for 54 out of the 57 compounds studied. The remaining three outliers from the original training series have in common a large unfavourable entropic contribution to the binding free energy that we attribute to taxane preorganization in aqueous solution in a conformation different from that compatible with tubulin binding. Support for this proposal was obtained from solution NMR experiments and molecular dynamics simulations in explicit water. Our results shed additional light on the determinants of tubulin-binding affinity for this important class of antitumour agents and pave the way for further rational structural modifications.

  我们合成了在巴卡丁核心的 C2 和 C13 位置进行修饰的十种新型紫杉醇，并通过实验测定了它们与哺乳动物微管蛋白的结合亲和力。设计策略的指导原则是：(i) 计算δ-微管蛋白的类固醇结合位点内碳、氮和氧探针的相互作用能量图；(ii) 前瞻性地使用基于结构的 QSAR（COMBINE）模型，该模型来自早期由 47 种同源类固醇组成的系列。事实证明，其中一种新化合物（CTX63）与微管蛋白的结合亲和力高于多西他赛，更新后的 COMBINE 模型为所研究的 57 种化合物中的 54 种提供了实验结合自由能与一组基于加权残基的配体与受体相互作用能之间的良好相关性。原始训练系列中的其余三个异常值的共同点是对结合自由能有很大的不利熵贡献，我们将其归因于紫杉烷在水溶液中的预组织构象不同于与管蛋白结合的构象。在显式水溶液中进行的溶液核磁共振实验和分子动力学模拟为这一提议提供了支持。我们的研究结果进一步揭示了这一类重要抗肿瘤药物与小管蛋白结合亲和力的决定因素，并为进一步合理调整结构铺平了道路。
• Synthesis and biological evaluation of amide-linked A-norpaclitaxels
  作者：Mahendra D. Chordia、David G.I. Kingston

  DOI：10.1016/s0040-4020(97)00281-0

  日期：1997.4

  A novel amide-linked A-norpaclitaxel 3a and two 2-aroyl analogs 3b and 3c were prepared from 10-deacetyl baccatin III. Key steps in the synthesis were the conversion of 7-(triethylsilyl)baccatin III to its 13β-chloro-A-nor derivative 6, reaction with sodium azide with inversion of stereochemistry to give the azide 8, and coupling of 8 with a protected β-phenylisoserine side chain 14 to give a protected

  由10-脱乙酰浆果赤霉素III制备了新的酰胺连接的A-或紫杉醇3a和两个2-芳酰基类似物3b和3c。合成的关键步骤是将7-（三乙基甲硅烷基）浆果赤霉素III转化为其13β-氯-A-nor衍生物6，与叠氮化钠反应，并通过立体化学转化得到叠氮化物8，以及将8与受保护的β偶联。-苯基异丝氨酸侧链14给出最终产物的保护形式15。在P-388细胞毒性试验中，三个类似物3a-3c的活性均低于紫杉醇，而3c 在微管蛋白组装测定中的活性也较低。
• Synthesis and Structure−Activity Relationships of Nonaromatic Taxoids:  Effects of Alkyl and Alkenyl Ester Groups on Cytotoxicity
  作者：Iwao Ojima、Scott D. Kuduk、Paula Pera、Jean M. Veith、Ralph J. Bernacki

  DOI：10.1021/jm9606711

  日期：1997.1.1

  Several new nonaromatic taxoids are synthesized by means of the beta-lactam synthon method. These include taxoids modified with 3-methylbut-2-enoate, 3-methylbutanoate, and cyclohexanecarboxylate groups in place of the benzoate at the C-2 position. In addition, taxoids with 2-methylprop-1-enyl, 2-methylpropyl, (E)-prop-1-enyl, and cyclohexyl groups at the C-3' position are also prepared in combination with the modifications at C-2. The alkyl and alkenyl ester groups at C-2 displayed pronounced effects on the in vitro cytotoxicity. Two of the fully aliphatic taxoids possess similar or stronger activity than paclitaxel and docetaxel. It is clear that the 2-benzoate does not play a unique role, and replacement with the appropriate alkyl and alkenyl groups provides taxoids with equivalent or superior activity.
• Synthesis of the 2α-benzoylamido analogue of docetaxel
  作者：Wei-Shuo Fang、Qi-Cheng Fang、Xiao-Tian Liang

  DOI：10.1016/s0040-4039(00)02243-7

  日期：2001.2

  The 2 alpha -benzoylamido analogue of docetaxel 2 was synthesized with a double inversion of the C-2 configuration as the key step, and its cytotoxic activity towards three tumor cell lines was tested. (C) 2001 Elsevier Science Ltd. All rights reserved.