ethyl 2-(((Z)-1,2-diphenylvinyl)imino)-4,4,4-trifluoro-3-oxobutanoate | 1445138-29-3

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 肉桂酸及其衍生物
• 英文名称: ethyl 2-(((Z)-1,2-diphenylvinyl)imino)-4,4,4-trifluoro-3-oxobutanoate
• CAS: 1445138-29-3
• 化学式: C₂₀H₁₆F₃NO₃
• 分子量: 375.347
• InChiKey: IEQIDHZLEJVZJU-DUYKUNAQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.32
• 重原子数：
  27.0
• 可旋转键数：
  6.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  55.73
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  ethyl 2,3-diphenyl-6-trifluoromethyl-2H-1,4-oxazine-5-carboxylate 以 氘代氯仿 为溶剂， 反应 6.5h， 以55%的产率得到ethyl 2-(((Z)-1,2-diphenylvinyl)imino)-4,4,4-trifluoro-3-oxobutanoate
  参考文献：
  名称：

  Rh(II)-carbenoid mediated 2H-azirine ring-expansion as a convenient route to non-fused photo- and thermochromic 2H-1,4-oxazines

  摘要：

  The Rh2(OAc)(4)-catalyzed domino reaction of 2H-azirines with 2-acyl-2-diazoacetates provides a unique synthetic approach to non-fused 2H-1,4-oxazines. The reaction proceeds via sequential formation of a rhodium carbenoid, an azirinium ylide, and a 1-acyl-1-(alkoxycarbonyl)-2-azabuta-1,3-diene to give, after 1,6-pi-electrocyclization, a 2H-1,4-oxazine derivative in good yield. The observed stereoselectivity of 2-azadiene formation is consistent with DFT calculations of the azirinium ylide-2-azadiene isomerization, providing evidence for the ylide mechanism of the reaction. The substitution pattern and configuration of the carbon carbon double bond in 2-azadienes has a dramatic influence on their cyclization to oxazines: the CO2R group on C-4 stabilizes an open-chain form and, as the result of this, a new class of stable 2-azadienes, 1-acyl-2-azadiene-1,4-dicarboxylates, could be isolated. The 1,4-oxazines obtained by this method are the first representatives of monocyclic 2H-1,4-oxazine derivatives, which exhibit photo- and thermochromic activity. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.03.106