pentacarbonyl(4-phenyl-5,6-cyclohexeno-2H-pyran-2-ylidene)tungsten | 182415-87-8

• 英文名称: pentacarbonyl(4-phenyl-5,6-cyclohexeno-2H-pyran-2-ylidene)tungsten
• CAS: 182415-87-8
• 化学式: C₂₀H₁₄O₆W
• 分子量: 534.178
• InChiKey: JQHCZNKLDAUIRO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  1-吗啉基-1-环己烯 、 pentacarbonyl(1-ethoxy-3-phenylpropyn-1-ylidene)tungsten 以 二氯甲烷 为溶剂， 以33%的产率得到pentacarbonyl(4-phenyl-5,6-cyclohexeno-2H-pyran-2-ylidene)tungsten
  参考文献：
  名称：

  Organic Syntheses via Transition Metal Complexes. 86. Regioselective [C₃ + C₂] Cyclopentadiene Annulation to Enamines with Alkynylcarbene Complexes of Chromium and Tungsten as Novel C₃ Building Blocks

  摘要：

  Alkynylcarbene complexes (CO)(5)M=C(OEt)C=CPh (10) (M = Cr, W) react with tertiary 1-aminocycloalkenes CH=C(NR(2))CH2 17-23 (cyclopentenes, -hexenes,and -heptenes, dihydronaphthalenes and -phenanthrenes; NR(2) = NMe(2), pyrrolidino, and morpholino) to afford cyclopentadiene annulation products 24-30 in an overall [3 + 2] cycloaddition process. The reaction is highly regioselective and proceeds under very mild conditions in 60-99% yields, 1-Metalla-1,3,6-heptatrienes (CO)(5)M=C(OEt)CH=C(Ph)-CHC(NR(2))=CH (G) and 1-metalla-1,3,5-hexatrienes,(CO)(5)M=C(OEt)CH=C(Ph)-C=C(NR(2))CH2 (H) are formed as II key intermediates, Compounds H cyclize to give cyclopentadiene complexes as precursors to the cyclopentadienes 24-30. Hydrolysis of 1-metalla-1,3,6-heptatrienes G leads to the production of pyran-2-ylidene complexes, e,g., 32a,b.

  DOI：

  10.1021/om960729+