1-benzyl-3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazole | 1130734-54-1

• 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: 1-benzyl-3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazole
• 英文别名: 1-benzyl-3,5-bis[(1S)-1-methoxyethyl]-1,2,4-triazole
• CAS: 1130734-54-1
• 化学式: C₁₅H₂₁N₃O₂
• 分子量: 275.351
• InChiKey: PSBLPNWGAMAJNY-RYUDHWBXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  20
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  49.2
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  在 锂硼氢 、 sodium hydroxide 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 6.0h， 生成 1-benzyl-3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazole 、 (S)-(-)- α-甲基苄胺
  参考文献：
  名称：

  Synthesis of chiral primary amines: diastereoselective alkylation of N-[(1E)-alkylidene]-3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazol-4-amines and N4–Nexocyclic bond cleavage in the resulting 1,2,4-triazol-4-alkylamines

  摘要：

  Enantiomerically pure 3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazol-4-amine 14a and 3,5-bis[(1S)-1-ethoxyethyl]-4H-1,2,4-triazol-4-amine 14b were used as chiral auxiliaries to obtain enantiomerically enriched alpha-aminoacetals, primary alkyl and arylalkyl amines (ee ranging from 40% to 90%). The different stages of the process were imine formation from the corresponding aldehydes, diastereoselective addition of a Grignard reagent, quaternization of the triazole auxiliary and cleavage of the N-4-N-exocylic bond by LiBH4. The mechanism of the cleavage of the N-4-N-exocyclic bond is supported by the use of deuterated metal hydride. The absolute configurations of the new stereogenic centres were established by X-ray analyses of the enantiomerically pure stereomers isolated by semi-preparative liquid chromatography on a chiral support. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2008.12.015

文献信息

• Synthesis of chiral primary amines: diastereoselective alkylation of N-[(1E)-alkylidene]-3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazol-4-amines and N4–Nexocyclic bond cleavage in the resulting 1,2,4-triazol-4-alkylamines
  作者：Muriel Serradeil-Albalat、Christian Roussel、Nicolas Vanthuyne、Jean-Claude Vallejos、Didier Wilhelm

  DOI：10.1016/j.tetasy.2008.12.015

  日期：2008.12

  Enantiomerically pure 3,5-bis[(1S)-1-methoxyethyl]-4H-1,2,4-triazol-4-amine 14a and 3,5-bis[(1S)-1-ethoxyethyl]-4H-1,2,4-triazol-4-amine 14b were used as chiral auxiliaries to obtain enantiomerically enriched alpha-aminoacetals, primary alkyl and arylalkyl amines (ee ranging from 40% to 90%). The different stages of the process were imine formation from the corresponding aldehydes, diastereoselective addition of a Grignard reagent, quaternization of the triazole auxiliary and cleavage of the N-4-N-exocylic bond by LiBH4. The mechanism of the cleavage of the N-4-N-exocyclic bond is supported by the use of deuterated metal hydride. The absolute configurations of the new stereogenic centres were established by X-ray analyses of the enantiomerically pure stereomers isolated by semi-preparative liquid chromatography on a chiral support. (C) 2008 Elsevier Ltd. All rights reserved.