N,N-diethyl-4-methylol-2-furamide | 158360-02-2

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: N,N-diethyl-4-methylol-2-furamide
• 英文别名: N,N-diethyl-4-(hydroxymethyl)furan-2-carboxamide
• CAS: 158360-02-2
• 化学式: C₁₀H₁₅NO₃
• 分子量: 197.234
• InChiKey: WHZCYMZXBZTHDS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  53.7
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2-(tert-Butyl-dimethyl-silanyl)-3-triethylsilanyloxymethyl-furan 在 正丁基锂 、 四丁基氟化铵 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 5.0h， 生成 N,N-diethyl-4-methylol-2-furamide
  参考文献：
  名称：

  一种简便的2,4-二取代呋喃制剂

  摘要：

  用1.3当量处理2-（叔丁基二甲基甲硅烷基）-3-（三乙基甲硅烷基氧甲基）呋喃。取正丁基锂（THF，-40°，3h），然后加入各种亲电试剂，得到2,3,5-三取代的呋喃，用四正丁基氟化铵处理后得到2,4-二取代的呋喃中等至极高的产量。

  DOI：

  10.1016/s0040-4039(00)73493-9

文献信息

• A facile preparation of 2,4-disubstituted furans
  作者：James A. Nieman、Brian A. Keay

  DOI：10.1016/s0040-4039(00)73493-9

  日期：1994.7

  Treatment of 2-(tert-butyldimethylsilyl)-3-(triethylsilyloxymethyl)furan with 1.3 equiv. of n-BuLi (THF, −40°, 3h), followed by the addition of a variety of electrophiles provided 2,3,5-trisubstituted furans, which upon treatment with tetra-n-butylammonium fluoride afforded 2,4-disubstituted furans in moderate to excellent yields.

  用1.3当量处理2-（叔丁基二甲基甲硅烷基）-3-（三乙基甲硅烷基氧甲基）呋喃。取正丁基锂（THF，-40°，3h），然后加入各种亲电试剂，得到2,3,5-三取代的呋喃，用四正丁基氟化铵处理后得到2,4-二取代的呋喃中等至极高的产量。
• Nieman James A., Keay Brian A., Tetrahedron Lett, 35 (1994) N 30, S 5335-5338
  作者：Nieman James A., Keay Brian A.

  DOI：——

  日期：——
• Regioselective Preparation of 2,4-, 3,4-, and 2,3,4-Substituted Furan Rings. 2.¹ Regioselective Lithiation of 2-Silylated-3-substituted Furan Rings
  作者：Edward Bures、James A. Nieman、Shuyuan Yu、Patrick G. Spinazzé、Jean-Louis J. Bontront、Ian R. Hunt、Arvi Rauk、Brian A. Keay

  DOI：10.1021/jo971098b

  日期：1997.12.1

  A new method for the preparation of 3,4- and 2,5-disubstituted furan rings is described. A variety of 2-silylated-3-(hydroxymethyl)furans and 2-silylated-3-furoic acids lithiate exclusively at C-4 when treated with 2.2 equivs of BuLi. The resulting dianions were quenched with a variety of electrophiles to provide 2-silylated-3-(hydroxymethyl)-substituted furans and 2-silylated-4-substituted 3-furoic acids in good to excellent yields. Removal of the silyl group (n-Bu4NF) provided a variety of 4-substituted-3-(hydroxymethyl)furans and methyl 4-substituted-3-furoates, respectively. The latter esters were prepared due to difficulties encountered in isolating 4-substituted-3-furoic acids. The site of lithiation was altered by protecting the 3-hydroxyl group with a triethylsilane. Lithiation of 2-silylated-3-(((triethylsilyl)oxy)methyl)furan with 1.2 equivs of BuLi followed by the addition of electrophiles provided 2-silylated-3-(((triethylsilyl)oxy)methyl)-5-substituted furan rings. Subsequent removal of both silyl groups provided 2,4-disubstituted furan rings in moderate to good yields. A rationale is provided to explain why protection of the hydroxyl group at C-3 leads to a change in lithiation from the C-4 to the C-5 position of the furan ring. In addition, an explanation for the observed effect of adding HMPA or LiCl to the solution during the lithiation of 2-(tert-butyldimethylsilyl)-3-(hydroxymethyl)furan is provided.