| 864150-34-5

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• CAS: 864150-34-5
• 化学式: C₁₉H₂₉N₂O₃
• 分子量: 333.451
• InChiKey: WCQJGPGKHVHJCP-FVQBIDKESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  24
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.63
• 拓扑面积：
  42.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  在 palladium on activated charcoal sodium hydroxide 、 氢气 作用下， 以 甲醇 、 乙醇 、 水 为溶剂， 生成
  参考文献：
  名称：

  Synthesis and spectroscopic characterization of enantiopure protected trans-4-amino-1-oxyl-2,2,6,6-tetramethyl piperidine-3-carboxylic acid (trans β-TOAC)

  摘要：

  Enantiomerically pure (3R,4S) and (3S,4R) protected 4-amino-1-oxyl-2,2,6,6-tetramethylpiperidine-3-carboxylic acids were synthesized by reduction of the enamines resulting from the condensation of 3-carboxymethyl-1-oxyl-2,2,6,6-tetramethyl-4-piperidone with (R) or (S)-alpha-methylbenzylamine. While NaBH3CN/CH3COOH reduction gave predominantly a mixture of the two possible cis-diastereomers, the use of NaBH4/(CH3)(2)CHCOOH resulted in a mixture of only one trans- and one cis-diastereomer. Removal of the chiral auxiliary from the separated diastereoisomers by hydrogenolysis and regeneration of the nitroxide radical gave the desired beta-amino, esters. The ESR spectrum of the (3R,4s)-enantiomer is also reported. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2005.06.049
• 作为产物：
  描述：

  2,2,6,6-tetramethyl-3-methoxycarbonyl-4-piperidone-1-oxyl 在 sodium tetrahydroborate 、 溶剂黄146 、 异丁酸 作用下， 以 乙醇 、 甲苯 为溶剂， 反应 72.0h， 生成
  参考文献：
  名称：

  Synthesis and spectroscopic characterization of enantiopure protected trans-4-amino-1-oxyl-2,2,6,6-tetramethyl piperidine-3-carboxylic acid (trans β-TOAC)

  摘要：

  Enantiomerically pure (3R,4S) and (3S,4R) protected 4-amino-1-oxyl-2,2,6,6-tetramethylpiperidine-3-carboxylic acids were synthesized by reduction of the enamines resulting from the condensation of 3-carboxymethyl-1-oxyl-2,2,6,6-tetramethyl-4-piperidone with (R) or (S)-alpha-methylbenzylamine. While NaBH3CN/CH3COOH reduction gave predominantly a mixture of the two possible cis-diastereomers, the use of NaBH4/(CH3)(2)CHCOOH resulted in a mixture of only one trans- and one cis-diastereomer. Removal of the chiral auxiliary from the separated diastereoisomers by hydrogenolysis and regeneration of the nitroxide radical gave the desired beta-amino, esters. The ESR spectrum of the (3R,4s)-enantiomer is also reported. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2005.06.049

文献信息

• Synthesis and spectroscopic characterization of enantiopure protected trans-4-amino-1-oxyl-2,2,6,6-tetramethyl piperidine-3-carboxylic acid (trans β-TOAC)
  作者：Karen Wright、Augustin de Castries、Matthieu Sarciaux、Fernando Formaggio、Claudio Toniolo、Antonio Toffoletti、Michel Wakselman、Jean-Paul Mazaleyrat

  DOI：10.1016/j.tetlet.2005.06.049

  日期：2005.8

  Enantiomerically pure (3R,4S) and (3S,4R) protected 4-amino-1-oxyl-2,2,6,6-tetramethylpiperidine-3-carboxylic acids were synthesized by reduction of the enamines resulting from the condensation of 3-carboxymethyl-1-oxyl-2,2,6,6-tetramethyl-4-piperidone with (R) or (S)-alpha-methylbenzylamine. While NaBH3CN/CH3COOH reduction gave predominantly a mixture of the two possible cis-diastereomers, the use of NaBH4/(CH3)(2)CHCOOH resulted in a mixture of only one trans- and one cis-diastereomer. Removal of the chiral auxiliary from the separated diastereoisomers by hydrogenolysis and regeneration of the nitroxide radical gave the desired beta-amino, esters. The ESR spectrum of the (3R,4s)-enantiomer is also reported. (c) 2005 Elsevier Ltd. All rights reserved.