(Z)-5-ethylidene-4-methylene-3-(4-methylphenyl)-1,3-oxazolidin-2-one

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (Z)-5-ethylidene-4-methylene-3-(4-methylphenyl)-1,3-oxazolidin-2-one
• 英文别名: (5Z)-5-ethylidene-4-methylidene-3-(4-methylphenyl)-1,3-oxazolidin-2-one
• 化学式: C₁₃H₁₃NO₂
• 分子量: 215.252
• InChiKey: YFYNYKLRMSINSG-QCDXTXTGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  16
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  29.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  diiron nonacarbonyl 、 (Z)-5-ethylidene-4-methylene-3-(4-methylphenyl)-1,3-oxazolidin-2-one 以 苯 为溶剂， 以63%的产率得到tricarbonyl-η4-[(Z)-5-ethylidene-4-methylene-3-(4-methylphenyl)-1,3-oxazolidin-2-one]iron(0)
  参考文献：
  名称：

  合成和η的反应4 -二烯的Fe（CO）3个从配合物外-2-恶唑烷酮二烯。稳定共轭烯醇-氨基物种的简便世代

  摘要：

  新η的合成4 -二烯的Fe（CO）3个配合物从小说衍生外描述了-2-恶唑烷酮二烯。这些配合物是通过将取代的二烯与二铁九碳二烯进行热络合制备的，以提供相应的配合物，为结晶固体。X射线单晶结构分析揭示了二烯-铁配合物的特征结构性质，表明在扭曲的三角锥锥体几何构象中，两个羰基从金属指向金属的顶点C4和C5原子。杂环。通过烯丙基位置的酰化或烷基化对二烯部分的不成功的官能化表明这些二烯的强稳定性。这种稳定性促进了稳定和空前的共轭烯胺-烯醇酯-和en烯-烯醇-Fe（CO）3的生成 通过动力学或热力学控制反应条件形成配合物。

  DOI：

  10.1021/om900772z
• 作为产物：
  描述：

  2,3-戊二酮 、 对甲苯异氰酸酯 在 lithium carbonate 、 三乙胺 作用下， 生成 、 (Z)-5-ethylidene-4-methylene-3-(4-methylphenyl)-1,3-oxazolidin-2-one
  参考文献：
  名称：

  One-Step Synthesis and Highly Regio- and Stereoselective Diels−Alder Cycloadditions of Novel exo-2-Oxazolidinone Dienes

  摘要：

  An improved synthesis of exo-heterocyclic dienes like N-substituted 4,5-dimethylene 2-oxazolidinones 1, by a one-step method from diacetyl and isocyanates, was described. This highly convergent synthetic strategy has been successfully used for the preparation of novel (Z)-5-ethylidene-4-methylene analogs 4 in fair yields. Both dienes 1 and 4 undergo efficient addition of symmetric dienophiles in thermal Diels-Alder reactions, inasmuch as they react stereo- and regioselectively with the unsymmetric olefins methyl vinyl ketone (MVK) and methyl propiolate. This regioselectivity was greatly improved by using Lewis acid catalysts (TiCl4, AlCl3). The nitrogen atom of the 2-oxazolidinone ring seems to control the orientation of the dienophile approach. These results have been rationalized in terms of the frontier molecular orbital theory by ab initio calculations. For dienes 4, addition of MVK gave the endo isomer as the major product. Dimerization of dienes 4 was also highly regio-, chemo-, and stereoselective, giving only isomer 17. This reaction furnished a second product, which corresponded to dienes 18 obtained by the [1,5] sigmatropic rearrangement of 4. The structure of the dienes and main products was established by NMR experiments and X-ray diffraction analysis.

  DOI：

  10.1021/jo962403g

文献信息

• New Synthesis of Carbazoles from Novel<i>exo</i>-2-Oxazolidinone Dienes
  作者：Ashis B. Mandal、Francisco Delgado、Joaquín Tamariz

  DOI：10.1055/s-1998-1571

  日期：1998.1

  A new synthesis of carbazoles, via regioselective Diels-Alder reaction of novel exo-2-oxazolidinone dienes 1, is described. Cyclization with palladium acetate of the intermediate diaryl amines, obtained by a one-pot three-step procedure from the cycloadducts, yielded the desired substituted carbazoles.

  本文介绍了通过新型外-2-噁唑烷酮二烯 1 的区域选择性 Diels-Alder 反应合成咔唑的新方法。用乙酸钯对中间体二芳基胺进行环化反应，从环加成物中通过一步法三步反应得到了所需的取代咔唑。