(Z)-2-(2-methyl-3-phenyl-1-propenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane | 1187524-95-3

• 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: (Z)-2-(2-methyl-3-phenyl-1-propenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
• 英文别名: 4,4,5,5-tetramethyl-2-[(Z)-2-methyl-3-phenylprop-1-enyl]-1,3,2-dioxaborolane
• CAS: 1187524-95-3
• 化学式: C₁₆H₂₃BO₂
• 分子量: 258.168
• InChiKey: QHWODASTKLXVGL-SEYXRHQNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.81
• 重原子数：
  19
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (Z)-2-(2-methyl-3-phenyl-1-propenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 在 水 、 sodium hydroxide 、 碘 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 1.17h， 以81%的产率得到(Z)-(3-iodo-2-methylallyl)benzene
  参考文献：
  名称：

  Highly Regio- and Stereoselective Synthesis of (Z)-Trisubstituted Alkenes via Propyne Bromoboration and Tandem Pd-Catalyzed Cross-Coupling

  摘要：

  Contrary to all previous reports, bromoboration of propyne with BBr3 proceeds in >= 98% syn-selectivity to produce (Z)-2-bromo-1-propenyldibromoborane (1). Although 1 is readily prone to stereoisomerization, it can be converted to the pinacolboronate (2) of >= 98% isomeric purity by treatment with pinacol, which may then be subjected to Negishi coupling to give trisubstituted (Z)-alkenylpinacolboronates (3) containing various R groups in 73-90% yields. Iodinolysis of 3 affords alkenyl iodides (4) in 80-90% yields. All alkenes isolated and identified are >= 98% Z

  DOI：

  10.1021/ol901566e
• 作为产物：
  描述：

  (Z)-2-(2-bromoprop-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 、 溴甲苯 在 锌 、 bis-triphenylphosphine-palladium(II) chloride 作用下， 以 四氢呋喃 为溶剂， 以83%的产率得到(Z)-2-(2-methyl-3-phenyl-1-propenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
  参考文献：
  名称：

  Highly Regio- and Stereoselective Synthesis of (Z)-Trisubstituted Alkenes via Propyne Bromoboration and Tandem Pd-Catalyzed Cross-Coupling

  摘要：

  Contrary to all previous reports, bromoboration of propyne with BBr3 proceeds in >= 98% syn-selectivity to produce (Z)-2-bromo-1-propenyldibromoborane (1). Although 1 is readily prone to stereoisomerization, it can be converted to the pinacolboronate (2) of >= 98% isomeric purity by treatment with pinacol, which may then be subjected to Negishi coupling to give trisubstituted (Z)-alkenylpinacolboronates (3) containing various R groups in 73-90% yields. Iodinolysis of 3 affords alkenyl iodides (4) in 80-90% yields. All alkenes isolated and identified are >= 98% Z

  DOI：

  10.1021/ol901566e

文献信息

• Highly Diastereoselective and Enantiospecific Allylation of Ketones and Imines Using Borinic Esters: Contiguous Quaternary Stereogenic Centers
  作者：Jack L.-Y. Chen、Varinder K. Aggarwal

  DOI：10.1002/anie.201407127

  日期：2014.10.6

  allylic boronic esters are not sufficiently reactive to react with ketones and imines. However, they can be converted into the corresponding borinic esters by the sequential addition of nBuLi and TFAA. These reactive intermediates possess the perfect balance between reactivity and configurational stability. Their enhanced reactivity allows the highly selective allylation of both ketones and ketimines

  3,3-二取代的烯丙基硼酸酯的反应性不足，无法与酮和亚胺反应。但是，可以通过顺序添加nBuLi和TFAA将它们转化为相应的硼酸酯。这些反应性中间体在反应性和构型稳定性之间具有完美的平衡。它们增强的反应性使得酮和酮亚胺都具有高度选择性的烯丙基化，并且可以通过完全的立体控制轻松进入相邻的四元立体中心。该方法的多功能性在所有可能的四元-四元立体异构体的构建以及杂环，二氢异喹啉和吲哚的烯丙基化中得到证明。