α-(tert-butyl)-3-methoxy-2-pyridylmethanol | 1369964-31-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: α-(tert-butyl)-3-methoxy-2-pyridylmethanol
• 英文别名: 1-(3-Methoxypyridin-2-yl)-2,2-dimethylpropan-1-ol；1-(3-methoxypyridin-2-yl)-2,2-dimethylpropan-1-ol
• CAS: 1369964-31-7
• 化学式: C₁₁H₁₇NO₂
• 分子量: 195.261
• InChiKey: VVNRDFKHTJJPFH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  14
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  42.4
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  3-甲氧基吡啶 、 特戊醛 在 2,2,6,6-四甲基哌啶 、 正丁基锂 、 iron(II) bromide 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 3.0h， 以5%的产率得到α-(tert-butyl)-3-methoxy-2-pyridylmethanol
  参考文献：
  名称：

  Deprotonative metalation of aromatic compounds using mixed lithium–iron combinations

  摘要：

  The deprotonation of 2-methoxypyridine was attempted using putative (TMP)(3)FeLi prepared from different iron sources. Using iodine to intercept the metalated 2-methoxypyridine, the best result was obtained from FeBr2 (1 equiv) using THF at room temperature: nevertheless, in addition to the expected iodide, the corresponding 2,2'-dimer was obtained (86% total yield). The origin of the competitive formation of the 2,2'-dimer was not identified but mechanisms were suggested to explain its formation. It was observed that the nature of the electrophile employed to trap the 3-metalated 2-methoxypyridine has a strong impact on this dimer formation, the latter being favored using iodine (35% yield), but also benzophenone (28%), benzoyl chloride (22%), methyl iodide (27%), allyl bromide (15%), benzyl bromide (41%), and tetramethylthiuram disulphide (36%); for this reason, the yields of the expected derivatives were only 51, 15, 62, 0, <5, 18, and 0%, respectively. In contrast, using aldehydes readily led to the expected pyridine alcohols without dimerization (59% yield using 3,4,5-trimethoxybenzaldehyde and 66% yield using pivalaldehyde). 2,6-Dimethoxypyridine (in 68% yield), anisole (47%), 2,4-dimethoxypyrimidine (50% at C5 and 3% at C6), 2-fluoropyridine (64%), and thiophene (49%) were similarly converted into the corresponding alcohols after subsequent trapping with pivalaldehyde. Using iodine to trap the 2-metalated anisole did not lead to dimer formation, and 2-iodoanisole was isolated in 71% yield. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2012.02.019

文献信息

• Deprotonative metalation of aromatic compounds using mixed lithium–iron combinations
  作者：Elisabeth Nagaradja、Floris Chevallier、Thierry Roisnel、Viatcheslav Jouikov、Florence Mongin

  DOI：10.1016/j.tet.2012.02.019

  日期：2012.4

  The deprotonation of 2-methoxypyridine was attempted using putative (TMP)(3)FeLi prepared from different iron sources. Using iodine to intercept the metalated 2-methoxypyridine, the best result was obtained from FeBr2 (1 equiv) using THF at room temperature: nevertheless, in addition to the expected iodide, the corresponding 2,2'-dimer was obtained (86% total yield). The origin of the competitive formation of the 2,2'-dimer was not identified but mechanisms were suggested to explain its formation. It was observed that the nature of the electrophile employed to trap the 3-metalated 2-methoxypyridine has a strong impact on this dimer formation, the latter being favored using iodine (35% yield), but also benzophenone (28%), benzoyl chloride (22%), methyl iodide (27%), allyl bromide (15%), benzyl bromide (41%), and tetramethylthiuram disulphide (36%); for this reason, the yields of the expected derivatives were only 51, 15, 62, 0, <5, 18, and 0%, respectively. In contrast, using aldehydes readily led to the expected pyridine alcohols without dimerization (59% yield using 3,4,5-trimethoxybenzaldehyde and 66% yield using pivalaldehyde). 2,6-Dimethoxypyridine (in 68% yield), anisole (47%), 2,4-dimethoxypyrimidine (50% at C5 and 3% at C6), 2-fluoropyridine (64%), and thiophene (49%) were similarly converted into the corresponding alcohols after subsequent trapping with pivalaldehyde. Using iodine to trap the 2-metalated anisole did not lead to dimer formation, and 2-iodoanisole was isolated in 71% yield. (C) 2012 Elsevier Ltd. All rights reserved.