ethyl 6-methyl-3-phenyl-2-phthalimido-2H-1,4-oxazine-5-carboxylate | 1431934-87-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 异吲哚及其衍生物
• 英文名称: ethyl 6-methyl-3-phenyl-2-phthalimido-2H-1,4-oxazine-5-carboxylate
• 英文别名: ethyl 2-(1,3-dioxoisoindol-2-yl)-6-methyl-3-phenyl-2H-1,4-oxazine-5-carboxylate
• CAS: 1431934-87-0
• 化学式: C₂₂H₁₈N₂O₅
• 分子量: 390.395
• InChiKey: RVIQJSJQMOWMQE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.3
• 重原子数：
  29
• 可旋转键数：
  5
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  85.3
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  重氮基乙酰乙酸乙酯 、 1-(3-phenyl-2H-aziren-2-yl)-1H-isoindole-1,3(2H)-dione 在 dirhodium tetraacetate 作用下， 以 1,2-二氯乙烷 为溶剂， 以40%的产率得到ethyl 6-methyl-3-phenyl-2-phthalimido-2H-1,4-oxazine-5-carboxylate
  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