Methyl 6-(tert-butyldiphenylsiloxy)-2-hexynoate | 158478-17-2

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: Methyl 6-(tert-butyldiphenylsiloxy)-2-hexynoate
• 英文别名: methyl 6-tert-butyldiphenylsiloxy-hex-2-ynoate；6-(tert-butyldiphenylsiloxy)-2-hexynoate；Methyl 6-[tert-butyl(diphenyl)silyl]oxyhex-2-ynoate；methyl 6-[tert-butyl(diphenyl)silyl]oxyhex-2-ynoate
• CAS: 158478-17-2
• 化学式: C₂₃H₂₈O₃Si
• 分子量: 380.559
• InChiKey: YDIAOFRQXWBMJG-UHFFFAOYSA-N

物化性质

• 沸点：
  458.5±37.0 °C(Predicted)
• 密度：
  1.06±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.52
• 重原子数：
  27
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  Methyl 6-(tert-butyldiphenylsiloxy)-2-hexynoate 在 四丁基氟化铵 、 溶剂黄146 作用下， 以 四氢呋喃 为溶剂， 反应 3.0h， 以91%的产率得到6-羟基-2-己炔酸甲酯
  参考文献：
  名称：

  Synthesis of Hsp90 inhibitor dimers as potential antitumor agents

  摘要：

  Structure-based drug design was used to systematically synthesize PU3-dimers. The cytotoxicity of PU3 dimers 6 against breast cancer cell lines was evaluated, and their potency increased as the length of the bridging linker increased. Among the compounds tested, 6e with a C-20 linker was the most potent and exhibited a 20- to 30-fold increase in activity compared with that of the parent compound 5. Western blot analyses of the cell lysates treated with 6c revealed that 6c resulted in the concentration-dependent degradation of the Hsp90 client protein Her2, which is consistent with other Hsp90 inhibitors. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2008.04.070
• 作为产物：
  描述：

  叔丁基二苯基氯硅烷 在 咪唑 、 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 5.0h， 生成 Methyl 6-(tert-butyldiphenylsiloxy)-2-hexynoate
  参考文献：
  名称：

  Transannular Diels-Alder/Intramolecular Aldol Tandem Reaction as a Stereocontrolled Route to (+)-Aphidicolin and its Isosteric C8-Epimer1

  摘要：

  The trans,syn,cis A.B.C.[6.6.7] tricyclic subunit of aphidicolin could be derived from the transannular Diels-Alder (TADA) reaction of a trans,cis,cis (TCC) cyclopentadecatriene. On the other hand, a trans,trans,cis (TTC) isomeric cyclopentadecatriene could lead to the trans,syn,trans tricyclic skeleton of aphidicolin's C8-epimer. Interestingly, semiempirical calculations have shown the latter to be isosteric with aphidicolin in respect to the four hydroxyl groups. The required TCC and TTC 15-membered macrocyclic trienes 46 and 59 were synthesized using modern methods of acyclic stereoselection such as an organocopper-based difunctionalization reaction, Evans' asymmetric aldol methodology and Wittig-Horner-Wadsworth reactions. At the end, an efficient macrocyclization protocol served in achieving the synthesis of the desired optically active precursors 46 and 59. Whereas TCC substrate 46 failed to realize a TADA cycloaddition for steric and conformational reasons, TTC cyclopentadecatrienal 59 led to a stereospecific TADA/aldol tandem reaction. In the first reported example of such a transformation, macrocycle 59 was thermolyzed (toluene, sealed tube, 210 degrees C, 18 h) in a single operation into tetracyclic product 61 containing six new stereogenic centers. Mechanistic considerations of this impressive conversion along with transition-state modeling are also presented. Further transformations of compound 61 culminating in stereospecific functionalization at C16 were performed by making use of an hydroxyl-directed epoxidation reaction leading to the advanced intermediate 67. Thus, this exploratory work demonstrates the value of a TADA/aldol route for the synthesis of the titled compounds and analogs thereof.

  DOI：

  10.1021/jo00129a021

文献信息

• Rhodium-catalyzed aryl- and alkylation–oligomerization of alkynoates with organoboron reagents giving salicylates
  作者：Yuichi Yasuhara、Takahiro Nishimura、Tamio Hayashi

  DOI：10.1039/c000402b

  日期：——

  The reaction of alkynoates with aryl- or alkylboron reagents in the presence of a rhodium/diene catalyst gave high yields of salicylate derivatives with high selectivity, which consist of three or four molecules of the alkynoate and one organic group derived from the organoboron reagents.

  在铑/二烯催化剂存在下，炔酸盐与芳基或烷基硼试剂反应，以高产率和高选择性生成水杨酸盐衍生物，这些衍生物由三个或四个炔酸盐分子和一个来自有机硼试剂的有机组分组成。
• Mechanism of the Cobalt Oxazoline Palladacycle (COP)-Catalyzed Asymmetric Synthesis of Allylic Esters
  作者：Jeffrey S. Cannon、Stefan F. Kirsch、Larry E. Overman、Helen F. Sneddon

  DOI：10.1021/ja106688j

  日期：2010.11.3

  labeling experiments establishing that the reaction proceeds in an overall antarafacial fashion; (c) secondary deuterium kinetic isotope effects that suggest substantial rehybridization at both C1 and C3 in the rate-limiting step; and (d) DFT computational studies (B3-LYP/def2-TZVP) that provide evidence for bidentate substrate-bound intermediates and an anti-oxypalladation/syn-deoxypalladation pathway

  由钯 (II) 配合物 [COP-OAc](2) 催化的 (Z)-烯丙基三氯乙酰亚胺酯的催化对映选择性 S(N)2' 置换是一种广泛用于手性支链烯丙基酯不对称合成的方法。报告了各种旨在阐明催化机制的性质及其速率和对映体决定步骤的实验。主要发现包括以下内容：(a) 证明存在多种桥接二钯配合物并构成 COP 催化剂的静止状态（但是，单体钯 (II) 配合物可能参与催化循环）；(b) 确定反应以整体反面方式进行的标记实验；(c) 二次氘动力学同位素效应，表明在限速步骤中 C1 和 C3 处发生了大量再杂交；(d) DFT 计算研究 (B3-LYP/def2-TZVP)，为双齿底物结合中间体和抗氧化钯化/syn-deoxypalladation 途径提供证据。这些结果与一种新机制一致，在该机制中，亚胺酸氮螯合形成阳离子钯 (II) 中间体，激活烯烃以在对映体决定步骤中受到外部羧酸盐的攻击。酰氧基钯
• Total Synthesis of (+)-Chinensiolide B via Tandem Allylboration/Lactonization
  作者：Tim G. Elford、Dennis G. Hall

  DOI：10.1021/ja9104478

  日期：2010.2.10

  medicine. The first enantioselective total synthesis of (+)-chinensiolide B was accomplished in 15 steps for the longest linear sequence with an overall yield of 6.7% starting from inexpensive and readily available (R)-carvone. A highly stereoselective and E/Z-selective tandem allylboration/lactonization reaction between two highly functionalized partners was exploited as a key step. The synthesis also highlights

  chinensiolides 是最近从中国民间医学中使用的植物 Ixeris chinensis Nakai 中分离出来的愈创木酚型 α-亚甲基 γ-内酯天然产物家族。(+)-chinensiolide B 的第一个对映选择性全合成在 15 个步骤中完成，最长的线性序列从廉价且容易获得的 (R)-香芹酮开始，总产率为 6.7%。两个高度官能化的伙伴之间的高度立体选择性和 E/Z 选择性串联烯丙基硼化/内酯化反应被用作关键步骤。该合成还强调了由反应性 α-亚甲基 γ-内酯引起的化学选择性问题的几种解决方案。例如，
• Total Synthesis of (+)-Sieboldine A: Evolution of a Pinacol-Terminated Cyclization Strategy
  作者：Stephen M. Canham、David J. France、Larry E. Overman

  DOI：10.1021/jo300872y

  日期：2013.1.4

  This article describes synthetic studies that culminated in the first total synthesis of the Lycopodium alkaloid sieboldine A. During this study, a number of pinacol-terminated cationic cyclizations were examined to form the cis-hydrindanone core of sieboldine A. Of these, a mild Au(I)-promoted 1,6-enyne cyclization that was terminated by a semipinacol rearrangement proved to be most efficient. Fashioning the unprecedented N-hydroxyazacyclononane ring embedded within the bicyclo[5.2.1]decane-N,O-acetal moiety of sieboldine A was a formidable challenge. Ultimately, the enantioselective total synthesis of (+)-sieboldine A was completed by forming this ring in good yield by cyclization of a protected-hydroxylamine thioglycoside precursor.
• Transannular Diels-Alder/Intramolecular Aldol Tandem Reaction as a Stereocontrolled Route to (+)-Aphidicolin and its Isosteric C8-Epimer1
  作者：Dennis G. Hall、Pierre Deslongchamps

  DOI：10.1021/jo00129a021

  日期：1995.12

  The trans,syn,cis A.B.C.[6.6.7] tricyclic subunit of aphidicolin could be derived from the transannular Diels-Alder (TADA) reaction of a trans,cis,cis (TCC) cyclopentadecatriene. On the other hand, a trans,trans,cis (TTC) isomeric cyclopentadecatriene could lead to the trans,syn,trans tricyclic skeleton of aphidicolin's C8-epimer. Interestingly, semiempirical calculations have shown the latter to be isosteric with aphidicolin in respect to the four hydroxyl groups. The required TCC and TTC 15-membered macrocyclic trienes 46 and 59 were synthesized using modern methods of acyclic stereoselection such as an organocopper-based difunctionalization reaction, Evans' asymmetric aldol methodology and Wittig-Horner-Wadsworth reactions. At the end, an efficient macrocyclization protocol served in achieving the synthesis of the desired optically active precursors 46 and 59. Whereas TCC substrate 46 failed to realize a TADA cycloaddition for steric and conformational reasons, TTC cyclopentadecatrienal 59 led to a stereospecific TADA/aldol tandem reaction. In the first reported example of such a transformation, macrocycle 59 was thermolyzed (toluene, sealed tube, 210 degrees C, 18 h) in a single operation into tetracyclic product 61 containing six new stereogenic centers. Mechanistic considerations of this impressive conversion along with transition-state modeling are also presented. Further transformations of compound 61 culminating in stereospecific functionalization at C16 were performed by making use of an hydroxyl-directed epoxidation reaction leading to the advanced intermediate 67. Thus, this exploratory work demonstrates the value of a TADA/aldol route for the synthesis of the titled compounds and analogs thereof.