(5-hydroxy-(E)-pentenyl)boronic acid | 132048-17-0

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 硼酸衍生物
• 英文名称: (5-hydroxy-(E)-pentenyl)boronic acid
• 英文别名: (E)-(5-hydroxypent-1-en-1-yl)boronic acid；[(1E)-5-Hydroxypent-1-en-1-yl]boronic acid；[(E)-5-hydroxypent-1-enyl]boronic acid
• CAS: 132048-17-0
• 化学式: C₅H₁₁BO₃
• 分子量: 129.952
• InChiKey: HDXMSEDOLLTDDQ-DUXPYHPUSA-N

物化性质

• 沸点：
  321.8±44.0 °C(Predicted)
• 密度：
  1.090±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.67
• 重原子数：
  9
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  60.7
• 氢给体数：
  3
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (5-hydroxy-(E)-pentenyl)boronic acid 在 四(三苯基膦)钯 咪唑 、 sodium hydroxide 、 正丁基锂 、 titanium(III) chloride 、 ammonium acetate 、 双氧水 、 碘 、 sodium ethanolate 、 三苯基膦 作用下， 以 1,4-二氧六环 、 二氯甲烷 、 溶剂黄146 为溶剂， 反应 41.75h， 生成 (10E,12E)-2-(tert-Butyl-diphenyl-silanyloxy)-1-phenoxy-nonadeca-10,12-dien-5-one
  参考文献：
  名称：

  基于分子内氮-烯烃偶极环加成法的总合成圆柱状和Lepadiformine海洋生物碱的方法。

  摘要：

  使用分子内的硝酮/ 1,3-二烯双极环加成作为关键步骤，已实现了通往圆柱状蛋白骨架以及海洋生物碱lepadiformine结构的合成路线。合成从丙酮肟的顺序烷基化开始，以提供关键的中间体肟30，该中间体含有形成生物碱三环骨架所需的所有碳。可以通过标准转化方法从肟30获得的Nitrone 40经过分子内1,3-偶极环加成反应得到异恶唑烷43。还研究了在另外两个硝酮-烯烃底物41和42上制备的相关1,3-偶极环加成反应。类似于40的方式。通过环氧化-迈克尔加成衍生自异恶唑烷43的氨基醇49，立体选择性地形成了三环生物碱核心52。52的O-苯基醚的裂解提供了2-表位环丙氨酸C（53）。进行了几次不成功的尝试，即通过在C2上的差向异构化将52转化为cylindricineC。将三环酮52脱氧得到胺59，其结构和相对立体化学通过其苦味酸盐的单晶X射线分析得到证实。从59上除去O-苯基保护基团，得到具

  DOI：

  10.1021/jo990266s

文献信息

• Multistep Phase-Switch Synthesis by Using Liquid-Liquid Partitioning of Boronic Acids: Productive Tags with an Expanded Repertoire of Compatible Reactions
  作者：Sam Mothana、Jean-Marie Grassot、Dennis G. Hall

  DOI：10.1002/anie.200906710

  日期：2010.4.6

  Tagging along: A system for phase‐switch synthesis has been developed. The boronic acid functionality is used as a phase tag that complexes to sorbitol and facilitates compound transfer from an organic solvent to water at high pH. The phase tag can then be used in a productive reaction step to generate targeted products, thereby eliminating purification by silica gel chromatography.

  标记：已开发出一种用于相位开关合成的系统。硼酸官能度用作与山梨糖醇络合的相标签，并有助于化合物在高pH下从有机溶剂转移到水中。然后可以将相标签用于生产性反应步骤中以生成目标产物，从而消除了通过硅胶色谱纯化的过程。
• Synthesis and Biological Evaluation of Lactimidomycin and Its Analogues
  作者：Brian J. Larsen、Zhankui Sun、Eric Lachacz、Yaroslav Khomutnyk、Matthew B. Soellner、Pavel Nagorny

  DOI：10.1002/chem.201503527

  日期：2015.12.21

  macrocyclizations as a complete removal of these unsaturation units resulted in exclusive formation of the dimer rather than monocyclic enoate. The synthetic route features a late‐stage installation of the glutarimide functionality via an asymmetric catalytic Mukaiyama aldol reaction, which allows for a quick generation of lactimidomycin homolog 55 containing two additional carbons in the glutarimide side

  描述了最终合成含戊二酰亚胺的真核生物翻译延伸抑制剂乳胺嘧啶的研究。优化的合成路线具有Zn II介导的分子内Horner-Wadsworth-Emmons（HWE）反应，可在423 mg范围内高度立体选择性地形成乳酸亚丁霉素的紧张12元大内酯。E，Z的存在二烯功能被认为是有效大环化的关键，因为完全去除这些不饱和单元会导致二聚体而不是单环烯酸酯的形成。合成路线的特点是通过不对称催化Mukaiyama aldol反应在后期安装戊二酰亚胺官能团，从而可以快速生成在戊二酰亚胺侧链中含有两个额外碳原子的乳嘧啶同系物55。与乳嘧啶霉素类似，通过体外2D和3D分析，发现该类似物具有对MDA-MB-231乳腺癌细胞（GI 50 = 1–3μM）的细胞毒性。尽管就抗癌活性而言，乳嘧啶霉素被发现是最有效的化合物，但55以及类似的截短的类似物发现50至52个缺乏戊二酰亚胺侧链的化合物对人乳腺上皮细胞的毒性明显较低。
• Stereoselective synthesis of (Z,E)-2-bromo-1,3-dienes via the palladium (O) catalyzed cross coupling reactions of 1,1-dibromoolefins and vinylboronic acids
  作者：William R. Roush、Kevin J. Moriarty、Bradley B. Brown

  DOI：10.1016/s0040-4039(00)97103-x

  日期：1990.1

  (Z,E)-2-Bromo-1,3-dienes are synthesized via stereoselective Pd° catalyzed cross coupling reactions of 1,1-dibromoolefins and vinylboronic acids.

  （Z，E）-2-溴-1,3-二烯是通过1,1-二溴烯烃与乙烯基硼酸的立体选择性Pd°催化交叉偶联反应合成的。
• Enantioselective synthesis of the bottom half of chlorothricolide. 3. Studies of the steric directing group strategy for stereocontrol in intramolecular Diels-Alder reactions
  作者：William R. Roush、Masanori Kageyama、Renata Riva、Bradley B. Brown、Joseph S. Warmus、Kevin J. Moriarty

  DOI：10.1021/jo00003a049

  日期：1991.2

  The intramolecular Diels-Alder reactions of a series of C(7)-alkoxy-substituted 2(E),8(Z),10(E)-undecatrienoates and trienals containing removable C(9)-Br or C(9)-SiMe3 substituents (11, 12, 13, 33, 42, 43, 44, 45) were studied as part of a program directed toward the total synthesis of the bottom half of chlorothricolide. The IMDA reaction of trienoate 3 that lacks a C(9) substituent had previously been shown to cyclize with poor stereoselectivity to a mixture of four cycloadducts. It was expected that the IMDA reactions of trienes containing C(9) substituents (i.e., steric directing groups) would proceed with substantially enhanced stereoselectivity via trans-fused transition state A owing to nonbonded interactions that the steric directing groups experience in the competitive transition states B-D. Cis-fused transition states C and D suffer from serious interactions between C(9)-X and the axial C(6)-H, while trans-fused transition state B is destabilized by a 1,3-eclipsing interaction with the C(7)-alkoxyl group. Only the desired transition state, trans-fused transition state A, suffers from no serious interactions involving the C(9) steric directing group. These predictions were verified experimentally: the trans-fused cycloadduct deriving from A was the major product in all cases. Stereoselectivity for trans-fused cycloadducts was consistently greater, using C(9)-TMS directing groups compared to C(9)-Br substituted systems (for IMDA reactions under analogous conditions), but the C(9)-Br group appeared to have a greater influence on the partition between transition states A and B (see Table I). A surprising aspect of this study, however, is that significant amounts of cis-fused cycloadducts were obtained from the thermal cyclizations of the above-named trienes (12-45%), and this pathway was not entirely suppressed even in the Lewis acid catalyzed cycloadditions of trienals 44 and 45 (5-9% of cis fused cycloadduct). The results with TMS-substituted trienes 33, 42, and 44 thus are in disagreement with an earlier report by Boeckman and Barta (ref 5f) that the IMDA reaction of 33 gives ''a single cycloadduct (> 100:1).'' The cis-fused diastereomers most probably arise via boat-like transition state E rather than the chair-like transition state C. Cis-fused cycloadducts were not observed in the IMDA reaction of TMS-substituted triene 61 that lacks a C(7)-alkoxy substituent, suggesting that the C(7)-alkoxy groups electronically deactivate trans-fused transition state A such that boat-like transition state E is competitive only with substrates containing such C(7)-alkoxy substituents. Data are also presented that show that the C(9)-TMS substituents lead to an increase in reactivity (e.g., the IMDA reaction of 61 that proceeds at ambient temperature and the acid-catalyzed cyclocondensation of TMS diene aldehyde 63). This study defines bromo trienoate 43 as the optimal precursor to the bottom half unit (2) of chlorothricolide, even though the IMDA reaction of 43 is less selective than that of TMS-substituted trienes 42 and 44. The synthesis of 43 (Figure 4) involving the Pd0-catalyzed cross-coupling reaction of dibromo olefin 35 and vinylboronate 37 is shorter and considerably more efficient than the syntheses of TMS trienes 42 and 44, and this compensates for the fact that 43 is the least selective IMDA substrate.Syntheses that proceed by way of TMS trienoates like 42 or TMS trienals like 44 become competitive only if a more efficient triene synthesis is devised.
• A Convergent Stereoselective Synthesis of the Putative Structure of the Marine Alkaloid Lepadiformine via an Intramolecular Nitrone/1,3-Diene Dipolar Cycloaddition
  作者：Kim M. Werner、Jesus M. de los Santos、Steven M. Weinreb、Maoyu Shang

  DOI：10.1021/jo981897+

  日期：1999.2.1