1-(triisopropylsilyl)-1H-pyrrole-3-carbonitrile | 130408-91-2

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: 1-(triisopropylsilyl)-1H-pyrrole-3-carbonitrile
• 英文别名: 1-tri(propan-2-yl)silylpyrrole-3-carbonitrile
• CAS: 130408-91-2
• 化学式: C₁₄H₂₄N₂Si
• 分子量: 248.443
• InChiKey: GQPAQQSPEATLAP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.38
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.64
• 拓扑面积：
  28.7
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  三异丙基氯硅烷 在 sodium hydride 作用下， 以 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 2.0h， 生成 1-(triisopropylsilyl)-1H-pyrrole-3-carbonitrile
  参考文献：
  名称：

  N-(Triisopropylsilyl)pyrrole. A progenitor "par excellence" of 3-substituted pyrroles

  摘要：

  A very effective strategy has been devised for the synthesis of 3-substituted pyrroles based on the use of the triisopropylsilyl (TIPS) moiety as a sterically demanding nitrogen substituent to obstruct the attack of electrophilic reagents at the alpha-positions. 1-(Triisopropylsilyl)pyrrole (1) undergoes highly preferential kinetic electrophilic substitution at the beta-position with a variety of electrophiles (Br+, I+, NO2+, RCO+, etc.) and fluoride ion induced desilylation of the products provides the corresponding 3-substituted pyrroles in good overall yields. Competitive trifluoroacetylation experiments demonstrate that substitution of TIPS-pyrrole at the alpha-positions is decelerated by a factor of > 10(4), vs pyrrole at the same sites, without affecting reactivity at the beta-positions. 1-(Triisopropylsilyl)-3-bromopyrrole (2) is readily converted into the 3-lithio compound 44 by bromine-lithium interchange with alkyllithium reagents. This previously unavailable, formal equivalent of 3-lithiopyrrole is itself an excellent source of a wide range of beta-substituted pyrroles, many of which would not be directly preparable from 1. TIPS-pyrrole can be 3,4-dihalogenated and these compounds undergo sequential halogen-metal interchange trapping reactions. This process is exemplified by an efficient, three-step synthesis of the antibiotic verrucarin E (63) from the dibromo compound 5.

  DOI：

  10.1021/jo00313a019

文献信息

• Iron(II)‐Catalyzed Direct Cyanation of Arenes with Aryl(cyano)iodonium Triflates
  作者：Zhibin Shu、Wenzhi Ji、Xi Wang、Yujing Zhou、Yan Zhang、Jianbo Wang

  DOI：10.1002/anie.201309791

  日期：2014.2.17

  A direct oxidative cyanation of arenes under FeII catalysis with 3,5‐di(trifluoromethyl)phenyl(cyano)iodonium triflate (DFCT) as the cyanating agent has been developed. The reaction is applicable to wide range of aromatic substrates, including polycyclic structures and heteroaromatic compounds.

  已经开发了在Fe II催化下使用3,5-二（三氟甲基）苯基（氰基）碘化三氟甲磺酸盐（DFCT）作为氰化剂的芳烃直接氧化氰化反应。该反应适用于多种芳族底物，包括多环结构和杂芳族化合物。
• BRAY, BRIAN L.;MATHIES, PETER H.;NAEF, RETO;SOLAS, DENNIS R.;TIDWELL, THO+, J. ORG. CHEM., 55,(1990) N6, C. 6317-6328
  作者：BRAY, BRIAN L.、MATHIES, PETER H.、NAEF, RETO、SOLAS, DENNIS R.、TIDWELL, THO+

  DOI：——

  日期：——