(R)-dimethyl 2-chloro-2-(2-nitro-1-phenylethyl)malonate | 820242-20-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (R)-dimethyl 2-chloro-2-(2-nitro-1-phenylethyl)malonate
• 英文别名: methyl (R)-2-chloro-2-methoxycarbonyl-4-nitro-3-phenylbutyrate；Propanedioic acid, chloro[(1R)-2-nitro-1-phenylethyl]-, dimethyl ester；dimethyl 2-chloro-2-[(1R)-2-nitro-1-phenylethyl]propanedioate
• CAS: 820242-20-4
• 化学式: C₁₃H₁₄ClNO₆
• 分子量: 315.71
• InChiKey: BAXUUHIMDDOPPQ-JTQLQIEISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  98.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  反式硝基苯乙烯 、 氯丙二酸二甲酯 在 铜色树碱 作用下， 以 四氢呋喃 为溶剂， 反应 24.0h， 生成 (R)-dimethyl 2-chloro-2-(2-nitro-1-phenylethyl)malonate 、 dimethyl 2-chloro-2-((S)-2-nitro-1-phenylethyl)malonate
  参考文献：
  名称：

  溴代丙二酸酯向α，β-不饱和硝基烯烃的有机催化共轭加成反应对硝基环丙烷的高度对映选择性

  摘要：

  硝基环丙烷的高度对映选择性合成是通过将溴代丙二酸二甲酯向硝基烯烃的有机催化共轭加成反应以及随后的分子内环丙烷化而实现的。发现6'-脱甲基奎宁是有效的催化剂。对于各种芳基或杂芳基硝基乙烯，获得了优异的对映选择性，非对映选择性和良好的收率。

  DOI：

  10.1021/ol900227j

文献信息

• The Amino Thiourea-Catalyzed Asymmetric Nucleophilic Reactions
  作者：Yoshiji Takemoto、Hideto Miyabe

  DOI：10.2533/chimia.2007.269

  日期：——

  Bifunctional amino thiourea-catalyzed asymmetric additions of several nucleophiles into electron-deficient unsaturated compounds such as nitroolefins, ?,?-unsaturated imides, imines, and azodicarboxylates are described. We discovered that bifunctional thioureas bearing a tertiary amino group significantly accelerated several nucleophilic addition reactions of active methylene compounds to electron-deficient double bonds. In these reactions, a strong hydrogen-bonding ability of the thiourea moiety as well as an appropriate Brønsted basicity of the tertiary amine is crucial for high enantioselectivity. This dual activation of both nucleophiles and electrophiles by the bifunctional thiourea expanded the applicability of the thiourea-catalyzed enantioselective reaction. In addition, these organocatalyzed asymmetric reactions were successfully applied to the concise asymmetric synthesis of natural products and medicinal candidates such as epibatidine, baclofen, and CP-99,994.

  双功能氨基硫脲催化的不对称加成反应将几种亲核试剂加入到电子不足的不饱和化合物中，如硝基烯烃、α，β-不饱和亚酰胺、亚胺和叠氮二羧酸酯。我们发现，含有三级胺基的双功能硫脲显著加速了活性亚甲基化合物与电子不足双键的几种亲核加成反应。在这些反应中，硫脲基团的强氢键能力以及三级胺的适当Brønsted碱性对高对映选择性至关重要。双功能硫脲对亲核试剂和电子亲电试剂的双重活化扩展了硫脲催化的不对称反应的适用范围。此外，这些有机催化的不对称反应成功应用于天然产物和药用候选化合物的简洁不对称合成，如蛙毒碱、氯硝西泮和CP-99,994。
• Supported and Unsupported Chiral Squaramides as Organocatalysts for Stereoselective Michael Additions: Synthesis of Enantiopure Chromenes and Spirochromanes
  作者：José M. Andrés、Jorge Losada、Alicia Maestro、Patricia Rodríguez-Ferrer、Rafael Pedrosa

  DOI：10.1021/acs.joc.7b01177

  日期：2017.8.18

  Novel supported chiral bifunctional squaramides have been easily prepared starting from diamines derived from natural amino acids and commercially available aminoalkyl polystyrene resins. These squaramides behave as excellent stereoselective recoverable organocatalysts in different Michael additions, in neat conditions at room temperature. The reaction on 2-(2-nitrovinyl) phenol as electrophile lead

  从衍生自天然氨基酸的二胺和可商购的氨基烷基聚苯乙烯树脂开始，已经容易地制备了新型的负载性手性双官能方酸酰胺。在室温下的纯净条件下，这些麦角酰胺在不同的迈克尔添加量下均表现为出色的立体选择性可回收有机催化剂。以2-（2-硝基乙烯基）苯酚为亲电试剂，以优异的收率和对映选择性，反应生成易于转化为4 H-色烯和螺并二氢吡喃酮的中间体。