ethyl 2-acetoxy-4-(4-(dimethylamino)phenyl)-3-nitrobut-3-enoate | 1381932-37-1

• 分子结构分类: 有机化合物 - 有机氮化合物
• 英文名称: ethyl 2-acetoxy-4-(4-(dimethylamino)phenyl)-3-nitrobut-3-enoate
• CAS: 1381932-37-1
• 化学式: C₁₆H₂₀N₂O₆
• 分子量: 336.345
• InChiKey: COLKLKMXEPXVBG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.86
• 重原子数：
  24.0
• 可旋转键数：
  7.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  98.98
• 氢给体数：
  0.0
• 氢受体数：
  7.0

反应信息

• 作为反应物：
  描述：

  ethyl 2-acetoxy-4-(4-(dimethylamino)phenyl)-3-nitrobut-3-enoate 、 对甲苯磺酰肼 在 sodium carbonate 作用下， 以 甲醇 为溶剂， 反应 2.0h， 以72%的产率得到ethyl 3-(4-(dimethylamino)phenyl)-1H-pyrazole-5-carboxylate
  参考文献：
  名称：

  Cascade regioselective synthesis of pyrazoles from nitroallylic acetates and N-tosyl hydrazine

  摘要：

  A simple, practical, and regioselective synthetic protocol for the formation of pyrazoles was developed. Unlike all other previously reported reactions of nitroallylic acetates, this process was initiated by a S(N)2 reaction at the electrophilic gamma site. A plausible mechanism for the cascade S(N)2-Michael synthesis is proposed. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.12.046

文献信息

• Synthesis of functionalized and fused furans and pyrans from the Morita–Baylis–Hillman acetates of nitroalkenes
  作者：Divya K. Nair、Shaikh M. Mobin、Irishi N.N. Namboothiri

  DOI：10.1016/j.tetlet.2012.04.084

  日期：2012.6

  The Morita–Baylis–Hillman (MBH) acetates derived from nitroalkenes and ethyl glyoxylate have been transformed in one pot at room temperature to highly fused and functionalized furans and pyrans in good to excellent yield. The reaction involves a cascade Michael–oxa-Michael addition of β-dicarbonyl compounds to the MBH acetates in the presence of an amine base such as DABCO. An unusual switching of

  源自硝基链烯和乙醛酸乙酯的Morita-Baylis-Hillman（MBH）乙酸盐已在室温下在一锅中转化为高度熔融和官能化的呋喃和吡喃，收率良好至优异。该反应涉及在胺碱（例如DABCO）存在下，将β-二羰基化合物级联反应将β-二羰基Michael-oxa-Michael加成到MBH乙酸酯中。当β-二羰基化合物从无环或六元环改为五元环时，氧杂-迈克尔加成反应的选择性从5-外-trig转变为6-内-trig。
• Functionalized heterocyclic scaffolds derived from Morita–Baylis–Hillman Acetates
  作者：Huajian Zhu、Nana Shao、Tong Chen、Hongbin Zou

  DOI：10.1039/c3cc43285h

  日期：——

  Five series of heterocycles with extraordinary structural diversity have been regiospecifically synthesized from the same Morita–Baylis–Hillman Acetates (MBHAs). All four potential electrophilic sites (α, β, γ, δ) of MBHAs are proved to be reactive.

  五系列具有非凡结构多样性的杂环化合物已从相同的莫里塔-贝利斯-希尔曼醋酸酯（MBHAs）区域特异性合成。MBHAs的四个潜在电亲核位点（α、β、γ、δ）均已被证明具有反应性。