(4R,5R)-3,4-dimethyl-5-phenyl-1,3-oxazolan-2-one | 91049-51-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑烷类
• 英文名称: (4R,5R)-3,4-dimethyl-5-phenyl-1,3-oxazolan-2-one
• 英文别名: (4R,5R)-3,4-dimethyl-5-phenyl-1,3-oxazolidin-2-one；(4R,5R)-3,4-dimethyl-5-phenyloxazolidin-2-one；Pseudoephedroxane
• CAS: 91049-51-3
• 化学式: C₁₁H₁₃NO₂
• 分子量: 191.23
• InChiKey: MNYARIILPGRTQL-SCZZXKLOSA-N

物化性质

• 沸点：
  370.3±31.0 °C(Predicted)
• 密度：
  1.115±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  29.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (4R,5R)-3,4-dimethyl-5-phenyl-1,3-oxazolan-2-one 在 氢氧化钾 作用下， 以 乙醇 为溶剂， 反应 2.0h， 以88%的产率得到左旋伪麻黄碱
  参考文献：
  名称：

  Asymmetric synthesis of (−)-pseudoephedrine from (2S,3S)-3-phenyloxiran-2-ylmethanol. Stereospecific interchange of amino and alcohol functions

  摘要：

  A ring-opening reaction of N-methylaziridines with Boc(2)O/NaI has been applied to the asymmetric synthesis of pseudoephedrine. 3-Methylamino-3-phenyl-1,2-propanediol 1, derived from (2S,3S)-3-phenyloxiran-2-ylmethanol, was converted into the oxazolidin-2-one 4, a precursor of pseudoephedrine. The reaction occurs with a stereospecific interchange of amino and alcohol functions. (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0957-4166(01)00228-2
• 作为产物：
  描述：

  (2R,3R)-3-(methylamino)-3-phenyl-1,2-propanediol 在 吡啶 、 咪唑 、 potassium fluoride 、 sodium tetrahydroborate 、 偶氮二甲酸二异丙酯 、 三苯基膦 、 sodium iodide 作用下， 以 甲醇 、 乙醚 、 二氯甲烷 、 二甲基亚砜 、 丙酮 为溶剂， 反应 49.5h， 生成 (4R,5R)-3,4-dimethyl-5-phenyl-1,3-oxazolan-2-one
  参考文献：
  名称：

  Asymmetric synthesis of (−)-pseudoephedrine from (2S,3S)-3-phenyloxiran-2-ylmethanol. Stereospecific interchange of amino and alcohol functions

  摘要：

  A ring-opening reaction of N-methylaziridines with Boc(2)O/NaI has been applied to the asymmetric synthesis of pseudoephedrine. 3-Methylamino-3-phenyl-1,2-propanediol 1, derived from (2S,3S)-3-phenyloxiran-2-ylmethanol, was converted into the oxazolidin-2-one 4, a precursor of pseudoephedrine. The reaction occurs with a stereospecific interchange of amino and alcohol functions. (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0957-4166(01)00228-2

文献信息

• Experimental and DFT study of the conversion of ephedrine derivatives into oxazolidinones. Double SN2 mechanism against SN1 mechanism
  作者：Abdelkarim El Moncef、El Mestafa El Hadrami、Miguel A. González、Elena Zaballos、Ramón J. Zaragozá

  DOI：10.1016/j.tet.2010.04.097

  日期：2010.7

  Sulfonation of the N-Boc derivatives of 1,2-aminoalcohols, such as ephedrine, pseudoephedrine, norephedrine, norpseudoephedrine, thiomicamine, and chloramphenicol yields a mixture of the corresponding oxazolidinones with inversion (erythro derivatives) and/or retention of configuration (threo derivatives)at C5. We suggest a competition between two mechanisms: an intramolecular SN2 process initiated

  磺化1,2-氨基醇的N -Boc衍生物，如麻黄碱，伪麻黄碱，去甲麻黄碱，去甲伪麻黄碱，硫代米胺和氯霉素，可得到相应的恶唑烷酮的混合物，具有倒置（赤型衍生物）和/或保留构型（苏式衍生物） ）在C5。我们建议两种机制之间的竞争：通过Boc基团的羰基氧攻击苄基碳引发的分子内S N 2过程，以及通过双重S N 2过程进行的另一种分子内S N 2过程。在赤型衍生物中，第一个机理是主要的，而在苏氨酸中，第一个机理是主要的。两种机制的导数具有相似的能量。这一假设得到理论计算和其他实验分析的支持。
• Carboxylation and Mitsunobu Reaction of Amines to Give Carbamates:  Retention vs Inversion of Configuration Is Substituent-Dependent
  作者：Christopher J. Dinsmore、Swati P. Mercer

  DOI：10.1021/ol0491080

  日期：2004.8.1

  A mild method for the synthesis of carbamates from amino alcohols involves sequential carboxylation with carbon dioxide, followed by a Mitsunobu reaction. Unexpectedly, the stereochemical course of the Mitsunobu reaction is dependent on whether the carbamic acid intermediate is N-substituted with hydrogen (retention) or carbon (inversion).

  一种由氨基醇合成氨基甲酸酯的温和方法涉及与二氧化碳的顺序羧化，然后进行Mitsunobu反应。出乎意料的是，Mitsunobu反应的立体化学过程取决于氨基甲酸中间体是被氢（保留）还是被碳（转化）N-取代。
• Catalytic Activity of MCM-41–TBD in the Selective Preparation of Carbamates and Unsymmetrical Alkyl Carbonates from Diethyl Carbonate
  作者：Silvia Carloni、Dirk E. De Vos、Pierre A. Jacobs、Raimondo Maggi、Giovanni Sartori、Raffaella Sartorio

  DOI：10.1006/jcat.2001.3439

  日期：2002.1

  The synthesis of carbamates 3 and unsymmetrical alkyl carbonates 5 by reaction of diethyl carbonate with aliphatic amines or alcohols has been realized by using as heterogeneous catalyst a hybrid organic–inorganic material prepared by anchoring TBD to MCM-41 silica. Products are obtained in high yield and very good selectivity and the solid catalyst can be recovered simply by filtration and reused

  通过碳酸二乙酯与脂族胺或醇的反应合成氨基甲酸酯3和不对称碳酸烷基酯5的方法是，将TBD固定在MCM-41二氧化硅上，使用有机-无机杂化材料作为非均相催化剂。以高收率和非常好的选择性获得产物，并且可以通过过滤简单地回收固体催化剂，并在不明显降低活性的情况下重新用于不同的循环。提出了一种受支持的N-甲乙氧基胍鎓活性中间体，并显示了一些光谱数据来支持机理假说。
• Carbon Dioxide as a Carbonylating Agent in the Synthesis of 2-Oxazolidinones, 2-Oxazinones, and Cyclic Ureas: Scope and Limitations
  作者：Jairo Paz、Carlos Pérez-Balado、Beatriz Iglesias、Luis Muñoz

  DOI：10.1021/jo100268n

  日期：2010.5.7

  Carbon dioxide can be used as a convenient carbonylating agent in the synthesis of 2-oxazolidinones, 2-oxazinones, and cyclic ureas. The transient carbamate anion generated by treating a primary or secondary amine group in basic media can be activated with phosphorylating agents such as Diphenylphosphoryl azide (DPPA) and Diphenyl chlorophosphate (DPPCl) but also with other types of electrophiles such

  在2-恶唑烷酮，2-恶嗪酮和环状脲的合成中，二氧化碳可用作方便的羰基化剂。通过在碱性介质中处理伯胺或仲胺基团而生成的瞬态氨基甲酸酯阴离子可以用磷酸化剂（如二苯基磷酰叠氮化物（DPPA）和二苯基氯代磷酸酯（DPPC1））活化，也可以用其他类型的亲电试剂（如SOCl 2，TsCl或氯化铝。羟基将活化的氨基甲酸酯分子内捕获导致形成2-恶唑烷酮或2-恶嗪酮，产率高至优异。该方法已成功地用于从相应的二胺合成高达7元环的环状脲。
• 1,3-Heterazolidines-2-heterounsaturated compounds derived from ephedrines
  作者：Alejandro Cruz、Rosalinda Contreras、Itzia I. Padilla-Martínez、Minerva Juárez-Juárez

  DOI：10.1016/j.tetasy.2006.05.009

  日期：2006.6

  Herein, a direct and easy method for preparing 2-oxo-, 2-thione- or 2-imine-1,3-heterazolidines derived from ephedrines and norephedrines are reported. The method is based on solvent free heating of ephedrines with oxocyanate or thiocyanate salts (180-200 degrees C). In the reactions with potassium oxocyanate in refluxing ethanol, it was possible to isolate ureidic derivatives. The structure and stereochernistry of the compounds were determined by H-1, C-13 NMR, IR spectroscopies and mass spectrometry. Ureidic derivatives, cis- 1,5-dimethyl-4-phenyl-imidazolidine-2-thione and trans-4-methyl-5-phenyl-thiazolidine-2-one are new compounds. Ephedrineurea, cis- 1,5-dimethyl-4-phenyl-imidazolidine-2-thione and trans-4-methyl-5-phenyl-thiazolidine-2-one were also studied by X-ray diffraction. (c) 2006 Elsevier Ltd. All rights reserved.