2-[甲基(二苯基)硅烷基]吡啶 | 28916-30-5

• 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
• 中文名称: 2-[甲基(二苯基)硅烷基]吡啶
• 英文名称: 2-pyridyldiphenylmethylsilane
• 英文别名: 2-(methyldiphenylsilyl)pyridine；2-(Diphenylmethylsilyl)pyridin；2-(methyl-diphenyl-silanyl)-pyridine；methyl-diphenyl-pyridin-2-ylsilane
• CAS: 28916-30-5
• 化学式: C₁₈H₁₇NSi
• 分子量: 275.425
• InChiKey: SMMQINJUGIBLAF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.18
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.06
• 拓扑面积：
  12.9
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  三甲基氯硅烷 、 2-[甲基(二苯基)硅烷基]吡啶 在 叔丁基锂 作用下， 以 乙醚 、 正戊烷 为溶剂， 反应 0.5h， 以72%的产率得到[(2-pyridyldiphenylsilyl)methyl]trimethylsilane
  参考文献：
  名称：

  Pyridyl Group Assisted Deprotonation of a Methyl Group on Silicon:  Complex Induced Proximity Effect and Novel Hydroxymethylation

  摘要：

  A novel methodology for the deprotonation of a methyl group on silicon has been developed. This newly developed cr-lithiation protocol is based on the intramolecular pyridyl group coordination to stabilize the a-silyl carbanion together with the inherent silicon a effect. It was found that the deprotonation (t-BuLi/Et(2)O/-78 degreesC) occurs with 2-pyridyltrimethylsilane but not with other related silanes such as phenyltrimethylsilane, 3-pyridyltrimethylsilane, and 4-pyridyltrimethylsilane. It seems that this deprotonation proceeded through the agency of the complex-induced proximity effect (CIPE) of a 2-pyridyl group on silicon. (1)H NMR analysis of (2-pyridyldimethylsilyl)methyllithium revealed the intramolecular coordination of a pyridyl group to lithium. ( 2-Pyridyldimethylsilyl)-methyllithium was found to react with chlorosilanes, hydrosilanes, chlorostannanes, bromine, iodine, organic bromides, aldehydes, and ketones in good to excellent yields. The resultant adducts were further oxidized with H(2)O(2)/KF to give the corresponding alcohols in excellent yields. Thus, this two-step transformation provides an efficient method for the nucleophilic hydroxymethylation.

  DOI：

  10.1021/jo015528g
• 作为产物：
  描述：

  2-(甲基亚硫酰基)吡啶 、 在 bis(triethylphosphine)nickel(II) bromide 作用下， 以 四氢呋喃 为溶剂， 反应 12.0h， 以80%的产率得到2-[甲基(二苯基)硅烷基]吡啶
  参考文献：
  名称：

  烷基芳基亚砜与甲硅烷基锌试剂的镍催化甲硅烷基化反应

  摘要：

  用甲硅烷基锌试剂进行Ni（PEt 3）Cl 2催化的烷基芳基亚砜的甲硅烷基化。该方案允许烷基芳基亚砜在温和的反应条件下转化为芳基硅化合物，可耐受一定范围的官能团，并且适用于多种底物。

  DOI：

  10.1039/d1ob00840d

文献信息

• Electrochemical reactor dictates site selectivity in N-heteroarene carboxylations
  作者：Guo-Quan Sun、Peng Yu、Wen Zhang、Wei Zhang、Yi Wang、Li-Li Liao、Zhen Zhang、Li Li、Zhipeng Lu、Da-Gang Yu、Song Lin

  DOI：10.1038/s41586-022-05667-0

  日期：2023.3.2

  electrolysis setup gives rise to divergent site selectivity: a divided electrochemical cell leads to C5-carboxylation, whereas an undivided cell promotes C4-carboxylation. The undivided cell reaction is proposed to operate via a paired electrolysis mechanism9,10, wherein both cathodic and anodic events play critical roles in altering the site selectivity. Specifically, anodically-generated iodine preferentially

  吡啶和相关的N-杂芳烃常见于药物、农用化学品和其他生物活性化合物中1,2。位点选择性 C-H 功能化将提供一种直接制备这些药物活性产品的方法3,4,5。例如，烟酸衍生物可以通过 C-H 羧化来制备，但这仍然是一个难以捉摸的转化6,7,8。在这里，我们描述了使用CO 2直接羧化吡啶的电化学策略的开发。电解设置的选择会产生不同的位点选择性：分开的电化学电池导致 C5-羧化，而未分开的电池则促进 C4-羧化。建议通过配对电解机制9,10进行整体电池反应，其中阴极和阳极事件在改变位点选择性方面发挥着关键作用。具体来说，阳极产生的碘优先通过氢原子转移与C4-羧化途径中的关键自由基阴离子中间体反应，从而通过Curtin-Hammett原理11改变反应选择性。转化范围扩大到多种N-杂芳烃，包括双吡啶和三联吡啶、嘧啶、吡嗪和喹啉。
• A nickel-catalyzed silylation reaction of alkyl aryl sulfoxides with silylzinc reagents
  作者：Wei-Ze Li、Zhong-Xia Wang

  DOI：10.1039/d1ob00840d

  日期：——

  Ni(PEt3)Cl2-catalyzed silylation of alkyl aryl sulfoxides with silylzinc reagents was carried out. This protocol allows alkyl aryl sulfoxides to convert to arylsilicon compounds under mild reaction conditions, tolerates a range of functional groups and is suitable for a wide scope of substrates.

  用甲硅烷基锌试剂进行Ni（PEt 3）Cl 2催化的烷基芳基亚砜的甲硅烷基化。该方案允许烷基芳基亚砜在温和的反应条件下转化为芳基硅化合物，可耐受一定范围的官能团，并且适用于多种底物。
• Pyridyl Group Assisted Deprotonation of a Methyl Group on Silicon:  Complex Induced Proximity Effect and Novel Hydroxymethylation
  作者：Kenichiro Itami、Toshiyuki Kamei、Koichi Mitsudo、Toshiki Nokami、Jun-ichi Yoshida

  DOI：10.1021/jo015528g

  日期：2001.6.1

  A novel methodology for the deprotonation of a methyl group on silicon has been developed. This newly developed cr-lithiation protocol is based on the intramolecular pyridyl group coordination to stabilize the a-silyl carbanion together with the inherent silicon a effect. It was found that the deprotonation (t-BuLi/Et(2)O/-78 degreesC) occurs with 2-pyridyltrimethylsilane but not with other related silanes such as phenyltrimethylsilane, 3-pyridyltrimethylsilane, and 4-pyridyltrimethylsilane. It seems that this deprotonation proceeded through the agency of the complex-induced proximity effect (CIPE) of a 2-pyridyl group on silicon. (1)H NMR analysis of (2-pyridyldimethylsilyl)methyllithium revealed the intramolecular coordination of a pyridyl group to lithium. ( 2-Pyridyldimethylsilyl)-methyllithium was found to react with chlorosilanes, hydrosilanes, chlorostannanes, bromine, iodine, organic bromides, aldehydes, and ketones in good to excellent yields. The resultant adducts were further oxidized with H(2)O(2)/KF to give the corresponding alcohols in excellent yields. Thus, this two-step transformation provides an efficient method for the nucleophilic hydroxymethylation.