| 1417175-74-6

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• CAS: 1417175-74-6
• 化学式: C₁₁H₁₂O₂
• 分子量: 176.215
• InChiKey: PXFICHORIOEALC-WPRPVWTQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.25
• 重原子数：
  13.0
• 可旋转键数：
  2.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为产物：
  描述：

  trans-2-methyl-cyclopropyl-boronic ester 、 苯甲酰氯 在 sodium perborate tetrahydrate 、 4-二甲氨基吡啶 作用下， 以 乙醚 、 水 、 二氯甲烷 为溶剂， 反应 18.0h， 生成
  参考文献：
  名称：

  快速构建取代的四氢吡喃的串联烯丙基硼化-Prins反应：在（-）-Clavosolide A的全合成中的应用。

  摘要：

  四氢吡喃是天然产物中的常见基序，现已通过三组分烯丙基硼化-Prins反应序列以高度立体控制的方式构建。该方法已应用于大环内酯（-）-clavosolide A的简捷（13个步骤）和高效（14％的总收率）合成。该合成还具有早期糖苷化反应以引入木糖部分和锂化-硼化的特点反应以连接含环丙基的侧链。

  DOI：

  10.1002/anie.201511140

文献信息

• General Cyclopropane Assembly by Enantioselective Transfer of a Redox‐Active Carbene to Aliphatic Olefins
  作者：Marc Montesinos‐Magraner、Matteo Costantini、Rodrigo Ramírez‐Contreras、Michael E. Muratore、Magnus J. Johansson、Abraham Mendoza

  DOI：10.1002/anie.201814123

  日期：2019.4.23

  group in this reagent enhances the reactivity and selectivity of geminal carbene transfer. This effect allowed the asymmetric cyclopropanation of various olefins, including unfunctionalized aliphatic alkenes, that enables the three‐step total synthesis of (−)‐dictyopterene A. This unified synthetic approach delivers high enantioselectivities that are independent of the stereoelectronic properties of the

  目前，即使靶向相似的化合物，不对称环丙烷的合成也需要定制策略，方法，底物和试剂。这种方法减慢了发现速度并限制了可用的化学空间。本文介绍了一种实用且通用的重氮化合物及其在官能化环丙烷的首次统一不对称合成中的性能。该试剂中的氧化还原活性离去基团增强了双金属卡宾转移的反应性和选择性。这种作用允许各种烯烃（包括未官能化的脂肪族烯烃）进行不对称环丙烷化，从而实现三步全合成（-）-dict蝶烯A。这种统一的合成方法可提供高对映选择性，而对映选择性与转移的官能团的立体电子性质无关。
• Enantioselective <i>syn</i> and <i>anti</i> Homocrotylation of Aldehydes: Application to the Formal Synthesis of Spongidepsin
  作者：Hongkun Lin、Leiming Tian、Isaac J. Krauss

  DOI：10.1021/jacs.5b08858

  日期：2015.10.14

  Whereas crotylboration has been a useful method for synthesis of stereochemically complex products, we have shown that homocrotylboration can be achieved with cyclopropanated crotylation reagents, and that the stereo-selectivity of the reaction can be predicted by analogous models. This paper presents a full account of this work, including the first examples of asymmetric anti homocrotylation. The scope of this reaction is demonstrated with highly enantioselective homocrotylation of both aliphatic and aromatic aldehydes, as well as double diastereoselection studies. An application of the synthesis of the marine natural product spongidepsin is presented, as well as streamlined syntheses of homocrotylation reagents.
• Enantioselective Homocrotylboration of Aliphatic Aldehydes
  作者：Hongkun Lin、Wenbo Pei、Hao Wang、Kendall N. Houk、Isaac J. Krauss

  DOI：10.1021/ja311061n

  日期：2013.1.9

  A practical route to optically pure syn-homocrotylation reagents is described, including highly diastereo- and enantioselective preparation of numerous syn-homocrotyl products, as well as several matched mismatched pairs. NMR experiments suggest that the active homocrotylating species is a cyclopropylcarbinyldichloroborane generated by chloride exchange from the PhBCl2 activator. Computational studies support the intermediacy of chloroboranes and suggest that homoallyl/homocrotyl transfers occur through Zimmerman-Traxler transition states.