(2R,4S,5S)-(+)-5-Amino-2-tert-butyl-2,4-diphenyl-1,3-dioxan | 73473-97-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2R,4S,5S)-(+)-5-Amino-2-tert-butyl-2,4-diphenyl-1,3-dioxan
• 英文别名: (2S,4S,5S)-5-amino-2-tert-butyl-2,4-diphenyl-1,3-dioxacyclohexane；(2S,4S,5S)-2-tert-butyl-2,4-diphenyl-1,3-dioxan-5-amine
• CAS: 73473-97-9
• 化学式: C₂₀H₂₅NO₂
• 分子量: 311.424
• InChiKey: VTZCJPVKXJJFNW-CMKODMSKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  23
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  44.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  苯甲醛 、 (2R,4S,5S)-(+)-5-Amino-2-tert-butyl-2,4-diphenyl-1,3-dioxan 以 甲醇 为溶剂， 以90%的产率得到(2S,4S,5S)-(+)-5-Benzylidenamino-2-tert-butyl-2,4-diphenyl-1,3-dioxan
  参考文献：
  名称：

  Weinges, Klaus; Klotz, Klaus-Peter; Droste, Holger, Chemische Berichte, 1980, vol. 113, # 2, p. 710 - 721

  摘要：

  DOI：
• 作为产物：
  描述：

  在 aluminum (III) chloride 作用下， 以 四氢呋喃 、 水 、 乙腈 为溶剂， 反应 168.0h， 生成 (2R,4S,5S)-(+)-5-Amino-2-tert-butyl-2,4-diphenyl-1,3-dioxan
  参考文献：
  名称：

  Synthesis and characterization of chiral mono N-heterocyclic carbene-substituted rhodium complexes and their catalytic properties in hydrosilylation reactions

  摘要：

  Different chiral mono-substituted N-heterocyclic carbene complexes of rhodium were prepared, starting from [Rh(COD)Cl](2) (COD = cyclooctadiene) by addition of free N-heterocyclic carbenes (NHC), or an in-situ deprotonation of the corresponding iminium salt. All new complexes were characterized by spectroscopy methods. In addition, the structures of chloro(eta(4)-1,5-cyclooctadiene)(1,3-di-[(1R,2R,3R,5S)-2,6,6- trimethylbicyclo[3.1.1]hept-3-yl] imidazolin-2-ylidene) rhodium(I) (5a), chloro(eta(4)-1,5-cyclooctadiene)(1,3-di-[(1R,2S,5R)-2-isopropyl-5-menthylcyclohex-1-yl] imidazol-2-ylidene)rhodium(I) (5b) and chloro(eta(4)-1,5-cyclooctadiene)(1,3-di-[(2R,4S,5S)-2-methyl-4-phenyl-1,3-dioxacyclohex-5-yl]imidazolin-2- ylidene)rhodium(I) (5i) were analyzed by DFT-calculations. The enantioselective hydrosilylation of acetophenone, ethylpyruvate and n-propylpyruvate with diphenylsilane and hydrolysis was carried out with chiral C-2-symmetrical mono-substituted N-heterocyclic carbene rhodium complexes giving for the first time an enantioselective excess of up to 74% ee in the case of the n-propylpyruvate. (C) 2011 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2011.04.001