2-(2,6-Dideuterio-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane | 740871-98-1

• 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: 2-(2,6-Dideuterio-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
• CAS: 740871-98-1
• 化学式: C₁₃H₁₉BO₂
• 分子量: 220.088
• InChiKey: GKSSEDDAXXEPCP-XETGXLELSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.29
• 重原子数：
  16
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.54
• 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：

  8-bromotetrazolo[1,5-a]pyridine 、 2-(2,6-Dideuterio-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 在 四(三苯基膦)钯 、 potassium carbonate 作用下， 以 乙二醇二甲醚 、 水 为溶剂， 反应 12.0h， 以178.3 mg的产率得到8-(4-methylphenyl-2,6-d2)tetrazolo[1,5-a]pyridine
  参考文献：
  名称：

  1,2,3,4-四唑通过电环化的 Ir 催化分子内环化/C(sp2)-H 胺化

  摘要：

  描述了一种对含有 C8 取代芳烃、杂芳烃和烯烃的 1,2,3,4-四唑进行分子内脱氮环化/C(sp2)-H 胺化的有效策略。该过程涉及通过 [Cp*IrCl2]2 和 AgSbF6 的组合从四唑生成金属-氮烯中间体。已经表明该反应通过前所未有的电环化过程进行。该方法已成功应用于合成各种 α-咔啉和 7-氮杂吲哚。

  DOI：

  10.1021/jacs.8b05343
• 作为产物：
  描述：

  4-甲基苯胺盐酸盐 在 palladium bis[bis(diphenylphosphino)ferrocene] dichloride 盐酸 、 三乙胺 、 sodium nitrite 作用下， 反应 48.0h， 生成 2-(2,6-Dideuterio-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
  参考文献：
  名称：

  Phototransposition Reactions of Arylboronate Esters in Acetonitrile and 2,2,2-Trifluoroethanol

  摘要：

  The phototransposition (para, meta, ortho) reactions of the arylboronate esters 4-, 3-, and 2-(4',4',5',5'-tetramethyl-1',3',2'-dioxaborolanyl)toluenes (1, 2, and 3, respectively) in both acetonitrile and 2,2,2-trifluoroethanol (TFE) using 254 nm irradiation have been examined. The irradiations resulted in steady-state compositions of para (5%), meta (19%), and ortho (76%) isomers in acetonitrile starting from the ortho isomer and para (12%), meta (54%), and ortho (35%) isomers in TFE starting from the para isomer. Analysis of the C-13 NMR spectrum of the product mixture obtained from the photochemistry of the para isomer selectively deuterated at C3 and C5 (1d(2)) revealed that the boron-substituted carbon is the active one in the phototransposition reactions in both acetonitrile and TFE. Similar results were observed for irradiations of 1 in cyclohexane. Fluorescence spectra, singlet-state lifetimes, and Stern-Volmer quenching of fluorescence with 2,3-dimethyl-1,3-butadiene indicated that the excited singlet states of these three isomers were spectroscopic minima and that the excited singlet state was the reactive one for 3 in acetonitrile.

  DOI：

  10.1021/jo040123s

文献信息

• Ir-Catalyzed Intramolecular Transannulation/C(sp²)–H Amination of 1,2,3,4-Tetrazoles by Electrocyclization
  作者：Sandip Kumar Das、Satyajit Roy、Hillol Khatua、Buddhadeb Chattopadhyay

  DOI：10.1021/jacs.8b05343

  日期：2018.7.11

  An efficient strategy for the intramolecular denitrogenative transannulation/C(sp2)-H amination of 1,2,3,4-tetrazoles bearing C8-substituted arenes, heteroarenes, and alkenes is described. The process involves the generation of the metal-nitrene intermediate from tetrazole by the combination of [Cp*IrCl2]2 and AgSbF6. It has been shown that the reaction proceeds via an unprecedented electrocyclization

  描述了一种对含有 C8 取代芳烃、杂芳烃和烯烃的 1,2,3,4-四唑进行分子内脱氮环化/C(sp2)-H 胺化的有效策略。该过程涉及通过 [Cp*IrCl2]2 和 AgSbF6 的组合从四唑生成金属-氮烯中间体。已经表明该反应通过前所未有的电环化过程进行。该方法已成功应用于合成各种 α-咔啉和 7-氮杂吲哚。
• Phototransposition Reactions of Arylboronate Esters in Acetonitrile and 2,2,2-Trifluoroethanol
  作者：K. S. Cameron、A. L. Pincock、J. A. Pincock、A. Thompson

  DOI：10.1021/jo040123s

  日期：2004.7.1

  The phototransposition (para, meta, ortho) reactions of the arylboronate esters 4-, 3-, and 2-(4',4',5',5'-tetramethyl-1',3',2'-dioxaborolanyl)toluenes (1, 2, and 3, respectively) in both acetonitrile and 2,2,2-trifluoroethanol (TFE) using 254 nm irradiation have been examined. The irradiations resulted in steady-state compositions of para (5%), meta (19%), and ortho (76%) isomers in acetonitrile starting from the ortho isomer and para (12%), meta (54%), and ortho (35%) isomers in TFE starting from the para isomer. Analysis of the C-13 NMR spectrum of the product mixture obtained from the photochemistry of the para isomer selectively deuterated at C3 and C5 (1d(2)) revealed that the boron-substituted carbon is the active one in the phototransposition reactions in both acetonitrile and TFE. Similar results were observed for irradiations of 1 in cyclohexane. Fluorescence spectra, singlet-state lifetimes, and Stern-Volmer quenching of fluorescence with 2,3-dimethyl-1,3-butadiene indicated that the excited singlet states of these three isomers were spectroscopic minima and that the excited singlet state was the reactive one for 3 in acetonitrile.