4,4,5,5-tetramethyl-2-(4-(thiophen-3-yl)phenyl)-1,3,2-dioxaborolane | 1359844-12-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 4,4,5,5-tetramethyl-2-(4-(thiophen-3-yl)phenyl)-1,3,2-dioxaborolane
• 英文别名: 4,4,5,5-Tetramethyl-2-(4-thiophen-3-ylphenyl)-1,3,2-dioxaborolane
• CAS: 1359844-12-4
• 化学式: C₁₆H₁₉BO₂S
• 分子量: 286.203
• InChiKey: XKGSZASBTMAIMT-UHFFFAOYSA-N

物化性质

• 沸点：
  373.7±25.0 °C(Predicted)
• 密度：
  1.12±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.71
• 重原子数：
  20
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  46.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  4-硝基苯酚三氟甲基磺酸酯 在 2-双环己基膦-2',6'-二甲氧基联苯 、 盐酸 、 potassium phosphate monohydrate 、 palladium on activated charcoal 、 氢气 、 palladium diacetate 、 三乙胺 、 sodium nitrite 作用下， 以 1,4-二氧六环 、 乙醇 、 水 、 甲苯 为溶剂， 生成 4,4,5,5-tetramethyl-2-(4-(thiophen-3-yl)phenyl)-1,3,2-dioxaborolane
  参考文献：
  名称：

  Design and synthesis of boronic acid inhibitors of endothelial lipase

  摘要：

  Endothelial lipase (EL) and lipoprotein lipase (LPL) are homologous lipases that act on plasma lipoproteins. EL is predominantly a phospholipase and appears to be a key regulator of plasma HDL-C. LPL is mainly a triglyceride lipase regulating (V)LDL levels. The existing biological data indicate that inhibitors selective for EL over LPL should have anti-atherogenic activity, mainly through increasing plasma HDL-C levels. We report here the synthesis of alkyl, aryl, or acyl-substituted phenylboronic acids that inhibit EL. Many of the inhibitors evaluated proved to be nearly equally potent against both EL and LPL, but several exhibited moderate to good selectivity for EL. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2011.12.043

文献信息

• Synthesis of Trimethylstannyl Arylboronate Compounds by Sandmeyer-Type Transformations and Their Applications in Chemoselective Cross-Coupling Reactions
  作者：Di Qiu、Shuai Wang、Shengbo Tang、He Meng、Liang Jin、Fanyang Mo、Yan Zhang、Jianbo Wang

  DOI：10.1021/jo402618r

  日期：2014.3.7

  A synthetic method based on Sandmeyer-type reactions to access both tin- and boron-substituted arenes from nitroaniline derivatives is described. This transformation can be applied to the synthesis of a series of functionalized trimethylstannyl arylboronates. In addition, the chemoselective reaction of the Stille and Suzuki–Miyaura cross-coupling reactions is explored, and a series of m- and p-terphenyl

  描述了一种基于Sandmeyer型反应的合成方法，可从硝基苯胺衍生物中获得锡和硼取代的芳烃。该转化可用于合成一系列官能化的三甲基锡烷基芳基硼酸酯。此外，还探索了Stille和Suzuki-Miyaura交叉偶联反应的化学选择性反应，并通过进行连续的一锅法式Stille和Suzuki-Miyaura交叉偶联反应合成了一系列m-和对-三苯基衍生物。
• Transition-Metal-Free, Visible-Light-Enabled Decarboxylative Borylation of Aryl <i>N</i>-Hydroxyphthalimide Esters
  作者：Lisa Candish、Michael Teders、Frank Glorius

  DOI：10.1021/jacs.7b03127

  日期：2017.6.7

  Herein, we report a conceptually novel borylation reaction proceeding via a mild photoinduced decarboxylation of redox-activated aromatic carboxylic acids. This work constitutes the first application of cheap and easily prepared N-hydroxyphthalimide esters as aryl radical precursors and does not require the use of expensive transition metals or ligands. The reaction is operationally simple, scalable

  在此，我们报告了一种概念上新颖的硼酸化反应，该反应通过氧化还原活化的芳族羧酸的温和光诱导脱羧进行。这项工作构成了廉价且易于制备的 N-羟基邻苯二甲酰亚胺酯作为芳基自由基前体的首次应用，并且不需要使用昂贵的过渡金属或配体。该反应操作简单、可扩展，并显示出广泛的范围和官能团耐受性。
• Palladium‐Catalyzed Decarbonylative Borylation of Carboxylic Acids: Tuning Reaction Selectivity by Computation
  作者：Chengwei Liu、Chong‐Lei Ji、Xin Hong、Michal Szostak

  DOI：10.1002/anie.201810145

  日期：2018.12.17

  demonstrated in the selective borylation of a variety of aromatics (>50 examples). This strategy was used in the late‐stage derivatization of pharmaceuticals and natural products. Computations reveal the mechanistic details of the unprecedented C−O bond activation of carboxylic acids. By circumventing the challenging decarboxylation, this strategy provides a general synthetic platform to access arylpalladium

  据报道羧酸的脱羰基硼酸酯化。在催化剂控制的条件下，对羧酸进行原位可及的空间受阻的酰基衍生物进行试剂脱羰后，会立即生成亲电子碳。该方法的范围和潜在影响在各种芳烃的选择性硼化中得到证明（> 50个实例）。该策略用于药物和天然产品的后期衍生化。计算揭示了前所未有的羧酸氧键活化机理。通过规避具有挑战性的脱羧反应，该策略提供了一个通用的合成平台，可用于从芳基钯物质中获得由丰富的羧酸形成的各种键。
• Rhodium-Catalyzed <i>ipso</i>-Borylation of Alkylthioarenes via C–S Bond Cleavage
  作者：Yuta Uetake、Takashi Niwa、Takamitsu Hosoya

  DOI：10.1021/acs.orglett.6b01250

  日期：2016.6.3

  Rhodium-catalyzed transformation of alkyl aryl sulfides into arylboronic acid pinacol esters via C–S bond cleavage is reported. In combination with transition-metal-catalyzed sulfanyl group-guided regioselective C–H borylation reactions of alkylthioarenes, this method allows the synthesis of a diverse range of multisubstituted arenes.

  据报道，铑通过CS键断裂将烷基芳基硫醚转变为芳基硼酸频哪醇酯。结合过渡金属催化的硫烷基通过烷基硫基芳烃进行的区域选择性C–H硼化反应，该方法可合成多种多样的多取代芳烃。
• Design and synthesis of boronic acid inhibitors of endothelial lipase
  作者：Daniel P. O’Connell、Daniel F. LeBlanc、Debra Cromley、Jeffrey Billheimer、Daniel J. Rader、William W. Bachovchin

  DOI：10.1016/j.bmcl.2011.12.043

  日期：2012.2

  Endothelial lipase (EL) and lipoprotein lipase (LPL) are homologous lipases that act on plasma lipoproteins. EL is predominantly a phospholipase and appears to be a key regulator of plasma HDL-C. LPL is mainly a triglyceride lipase regulating (V)LDL levels. The existing biological data indicate that inhibitors selective for EL over LPL should have anti-atherogenic activity, mainly through increasing plasma HDL-C levels. We report here the synthesis of alkyl, aryl, or acyl-substituted phenylboronic acids that inhibit EL. Many of the inhibitors evaluated proved to be nearly equally potent against both EL and LPL, but several exhibited moderate to good selectivity for EL. (C) 2011 Elsevier Ltd. All rights reserved.