1-(4'-硝基苯基)-1-羟基-5-甲氧基-3-戊酮 | 807364-49-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 1-(4'-硝基苯基)-1-羟基-5-甲氧基-3-戊酮
• 英文名称: 1-hydroxy-5-methoxy-1-(4-nitrophenyl)pentan-3-one
• 英文别名: 1-(4'-nitrophenyl)-1-hydroxy-5-methoxy-3-pentanone
• CAS: 807364-49-4
• 化学式: C₁₂H₁₅NO₅
• 分子量: 253.255
• InChiKey: KDMKXQPCDSLHAU-UHFFFAOYSA-N

物化性质

• 沸点：
  427.5±40.0 °C(Predicted)
• 密度：
  1.254±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.3
• 重原子数：
  18
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  92.4
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  1-(4'-硝基苯基)-1-羟基-5-甲氧基-3-戊酮 在 84G₃ aldolase antibody 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 水 、 乙腈 为溶剂， 反应 3.5h， 生成 4-(4'-nitrophenyl)-4-hydroxy-3-hydroxymethyl-2-butanone
  参考文献：
  名称：

  Unusual reversal of regioselectivity in antibody-mediated aldol additions with unsymmetrical methyl ketones

  摘要：

  A catalytic regio- and enantioselective aldol reaction of various unsymmetrical methyl ketones with para-nitrobenzaldehyde has been developed using aldolase antibodies as the catalysts. It has been found that the sense and level of regioselectivity for the reactions catalysed by antibody 38C2 and 33F12 are highly dependent on the structure of both the donor and the acceptor but in contrast, antibodies 84G3 and 93F3 catalyse the exclusive formation of the linear regioisomer independent of the structure of the reactants examined. The level of enantiocontrol is very high for most reactions. Both linear aldol enantiomers could be accessed through aldol or retro-aldol reactions using the same antibody. Theoretical studies on regioisomeric alpha- and beta-heteroatom substituted enamines derived from unsymmetrical ketones suggest that most of the linear aldol products formed in the presence of antibodies 84G3 and 93F3 must be formed from intermediate enamines which are not the thermodynamically most favourable. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2003.10.115
• 作为产物：
  描述：

  4-甲氧基丁-2-酮 、 对硝基苯甲醛 在 lithium diisopropyl amide 作用下， 以 四氢呋喃 为溶剂， 反应 3.5h， 以20%的产率得到1-(4'-硝基苯基)-1-羟基-5-甲氧基-3-戊酮
  参考文献：
  名称：

  Unusual reversal of regioselectivity in antibody-mediated aldol additions with unsymmetrical methyl ketones

  摘要：

  A catalytic regio- and enantioselective aldol reaction of various unsymmetrical methyl ketones with para-nitrobenzaldehyde has been developed using aldolase antibodies as the catalysts. It has been found that the sense and level of regioselectivity for the reactions catalysed by antibody 38C2 and 33F12 are highly dependent on the structure of both the donor and the acceptor but in contrast, antibodies 84G3 and 93F3 catalyse the exclusive formation of the linear regioisomer independent of the structure of the reactants examined. The level of enantiocontrol is very high for most reactions. Both linear aldol enantiomers could be accessed through aldol or retro-aldol reactions using the same antibody. Theoretical studies on regioisomeric alpha- and beta-heteroatom substituted enamines derived from unsymmetrical ketones suggest that most of the linear aldol products formed in the presence of antibodies 84G3 and 93F3 must be formed from intermediate enamines which are not the thermodynamically most favourable. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2003.10.115

文献信息

• Efficient Baylis−Hillman Reactions of Cyclic Enones in Methanol As Catalyzed by Methoxide Anion
  作者：Sanzhong Luo、Xueling Mi、Hui Xu、Peng George Wang、Jin-Pei Cheng

  DOI：10.1021/jo0491760

  日期：2004.11.1

  The Baylis−Hillman reactions of cyclic enones with a variety of aldehydes were investigated. 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) was found to be a viable catalyst in promoting the reactions of sterically retarded substrates in methanol. The reactions showed clear solvent dependence and only occurred in hydroxylic solvents, especially in methanol. Further consideration on the steric character of

  研究了环状烯酮与各种醛类的Baylis-Hillman反应。发现1,8-二氮杂双环[5.4.0]十一碳-7-烯（DBU）是促进空间延迟的底物在甲醇中反应的可行催化剂。反应显示出明显的溶剂依赖性，仅在羟基溶剂中发生，特别是在甲醇中。进一步考虑DBU的空间特性及其高碱度，再加上其他实验观察结果表明，甲醇盐阴离子应为“真正的” Baylis-Hillman催化剂。直接用甲醇盐作为催化剂进行类似反应的有效性已证实了这一点。提出这种类型的催化的反应途径取决于底物的选择。支持性的实验观察结果被证明并讨论了有关机械方面的考虑。该研究还表明，DBU和甲醇钠均可成功地用作甲醇中的有效催化剂，以促进一系列环烯酮（包括环戊-2-烯酮，环己-2-烯酮，γ-吡喃酮和γ-吡喃酮）的Baylis-Hillman反应。 1-苯并吡喃-4（4H）-一个。