(S)-1-(tert-butoxycarbonyl)-2-ethyl-4-methylimidazoline | 1299490-93-9

• 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: (S)-1-(tert-butoxycarbonyl)-2-ethyl-4-methylimidazoline
• 英文别名: tert-butyl (4S)-2-ethyl-4-methyl-4,5-dihydroimidazole-1-carboxylate
• CAS: 1299490-93-9
• 化学式: C₁₁H₂₀N₂O₂
• 分子量: 212.292
• InChiKey: JOVVBBPPSNZVKP-QMMMGPOBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  15
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.82
• 拓扑面积：
  41.9
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  N-(tert-butoxycarbonyl)-2-ethyl-4-methylimidazole 在 [bis(2-methylallyl)cycloocta-1,5-diene]ruthenium(II) 、 (R,R)-(S,S)-PhTRAP 、 氢气 、 三乙胺 作用下， 以 乙酸乙酯 为溶剂， 80.0 ℃ 、5.07 MPa 条件下， 反应 24.0h， 生成 (S)-1-(tert-butoxycarbonyl)-2-ethyl-4-methylimidazoline 、 (R)-1-(tert-butoxycarbonyl)-2-ethyl-4-methylimidazoline
  参考文献：
  名称：

  Catalytic Asymmetric Hydrogenation of N-Boc-Imidazoles and Oxazoles

  摘要：

  Substituted imidazoles and oxazoles were respectively hydrogenated into the corresponding chiral imidazolines and oxazolines (up to 99% ee). The highly enantioselective hydrogenation was achieved by using the chiral ruthenium catalyst, which is generated from Ru(eta(3)-methallyl)(2)(cod) and a trans-chelating chiral bisphosphine ligand, PhTRAP. This is the first successful catalytic asymmetric reduction of 5-membered aromatic rings containing two or more heteroatoms.

  DOI：

  10.1021/ja201543h

文献信息

• Catalytic Asymmetric Hydrogenation of Heteroarenes and Arenes
  作者：Ryoichi Kuwano

  DOI：10.1080/10426507.2014.974752

  日期：2015.6.3

  ruthenium-catalyzed hydrogenation of various azoles to proceed with high enantioselectivity. The PhTRAP–ruthenium catalyst transformed indoles, pyrroles, imidazoles, and oxazoles into the corresponding chiral heterocycles. Naphthalenes are also reduced with hydrogen by the chiral ruthenium catalyst, exclusively giving tetralins. Some 2-alkoxytetralins were obtained with over 90% ee from the catalytic asymmetric hydrogenation

  图形摘要 摘要 转螯合手性双膦 PhTRAP 允许钌催化的各种唑类氢化反应以高对映选择性进行。PhTRAP-钌催化剂将吲哚、吡咯、咪唑和恶唑转化为相应的手性杂环。萘也被手性钌催化剂用氢还原，专门得到四氢化萘。从相应的取代萘的催化不对称氢化中获得了一些具有超过 90% ee 的 2-烷氧基四氢化萘。