4-((E)-prop-1-enyl)-2-trichloromethyl-4,5-dihydrooxazol | 1040285-13-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑啉类
• 英文名称: 4-((E)-prop-1-enyl)-2-trichloromethyl-4,5-dihydrooxazol
• 英文别名: 4-[(E)-propenyl]-2-(trichloromethyl)-4,5-dihydro-1,3-oxazole；4-[(E)-prop-1-enyl]-2-(trichloromethyl)-4,5-dihydro-1,3-oxazole
• CAS: 1040285-13-9
• 化学式: C₇H₈Cl₃NO
• 分子量: 228.506
• InChiKey: NNZQLWFWURCTOE-NSCUHMNNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  12
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  21.6
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4-((E)-prop-1-enyl)-2-trichloromethyl-4,5-dihydrooxazol 生成 2,2,2-trichloro-N-((E)-1-hydroxymethylbut-2-enyl)-acetamide
  参考文献：
  名称：

  Ether-directed diastereoselectivity in catalysed Overman rearrangement: comparative studies of metal catalysts

  摘要：

  Ether-directed diastereoselectivity in Overman rearrangement of delta-methoxy and delta-TBDMSO substituted allylic trichloroacetimidates has been explored using PtCl2, PtCl4, AuCl and AuCl3 catalysts in comparison with commonly used Pd(II) catalysts. For both substrates the use of PtCl2 catalyst gave notably improved anti/syn-ratio of 1,2-aminoalcohol derivatives (anti/syn=11:1 for 5-methoxy; 6:1 for delta-TBDMSO) compared to all metal catalysts known to promote Overman rearrangement. Formation of 2-trichloromethyloxazoline was observed as a dominant side reaction in the metal catalysed rearrangement of a-methoxy substituted allylic trichloroacetimidates considerably reducing the yield of the desired product. This side reaction was suppressed when delta-TBDMS-ether was used as a directing group. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2008.03.099
• 作为产物：
  描述：

  (S,Z)-methyl 4-((tert-butyldimethylsilyl)oxy)pent-2-enoate 在 双(乙腈)氯化钯(II) 、 sodium hydride 、 二异丁基氢化铝 作用下， 以 乙醚 、 二氯甲烷 、 mineral oil 为溶剂， 反应 24.0h， 生成 4-((E)-prop-1-enyl)-2-trichloromethyl-4,5-dihydrooxazol
  参考文献：
  名称：

  通过烯烃氨基钯化β-杂原子消除环化三氯乙酰亚胺

  摘要：

  δ-乙酰氧基-O-烯丙基-和ε-乙酰氧基-O-高烯丙基-三氯乙酰亚胺酯环化为4-乙烯基恶唑啉和4-乙烯基二氢恶嗪已通过烯烃氨基钯化-β-杂原子消除有效实现。带有仲 δ-乙酰氧基的 (Z)-烯丙基亚胺酸酯经过 PdII 催化环化，选择性地产生 4-乙烯基恶唑啉的 E 异构体，并且没有产生 Overman 重排产物。使用手性底物，已经证明环化成 4-乙烯基恶唑啉的发生具有高手性转移。立体选择性 E 异构体的形成和手性转移为讨论可能的反应机理提供了基础。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

  DOI：

  10.1002/ejoc.200900917

文献信息

• Ether-directed diastereoselectivity in catalysed Overman rearrangement: comparative studies of metal catalysts
  作者：Ieva Jaunzeme、Aigars Jirgensons

  DOI：10.1016/j.tet.2008.03.099

  日期：2008.6

  Ether-directed diastereoselectivity in Overman rearrangement of delta-methoxy and delta-TBDMSO substituted allylic trichloroacetimidates has been explored using PtCl2, PtCl4, AuCl and AuCl3 catalysts in comparison with commonly used Pd(II) catalysts. For both substrates the use of PtCl2 catalyst gave notably improved anti/syn-ratio of 1,2-aminoalcohol derivatives (anti/syn=11:1 for 5-methoxy; 6:1 for delta-TBDMSO) compared to all metal catalysts known to promote Overman rearrangement. Formation of 2-trichloromethyloxazoline was observed as a dominant side reaction in the metal catalysed rearrangement of a-methoxy substituted allylic trichloroacetimidates considerably reducing the yield of the desired product. This side reaction was suppressed when delta-TBDMS-ether was used as a directing group. (C) 2008 Elsevier Ltd. All rights reserved.
• Cyclization of Trichloroacetimidates by Olefin Aminopalladation β-Heteroatom Elimination
  作者：Ansis Maleckis、Ieva Jaunzeme、Aigars Jirgensons

  DOI：10.1002/ejoc.200900917

  日期：2009.12

  The cyclization of δ-acetoxy-O-allyl- and ϵ-acetoxy-O-homoallyl-trichloroacetimidates to 4-vinyloxazolines and a 4-vinyldihydrooxazine has been efficiently achieved by olefin aminopalladation–β-heteroatom elimination. (Z)-Allylic imidates bearing a secondary δ-acetoxy group underwent PdII-catalysed cyclization to give the E isomers of 4-vinyloxazolines selectively and gave no Overman rearrangement

  δ-乙酰氧基-O-烯丙基-和ε-乙酰氧基-O-高烯丙基-三氯乙酰亚胺酯环化为4-乙烯基恶唑啉和4-乙烯基二氢恶嗪已通过烯烃氨基钯化-β-杂原子消除有效实现。带有仲 δ-乙酰氧基的 (Z)-烯丙基亚胺酸酯经过 PdII 催化环化，选择性地产生 4-乙烯基恶唑啉的 E 异构体，并且没有产生 Overman 重排产物。使用手性底物，已经证明环化成 4-乙烯基恶唑啉的发生具有高手性转移。立体选择性 E 异构体的形成和手性转移为讨论可能的反应机理提供了基础。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)