(2R,3R,4S,5R)-methyl 4-nitro-5-phenyl-3-(p-tolyl)-pyrrolidine-2-carboxylate | 1350971-13-9

• 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
• 英文名称: (2R,3R,4S,5R)-methyl 4-nitro-5-phenyl-3-(p-tolyl)-pyrrolidine-2-carboxylate
• 英文别名: methyl (2R,3R,4S,5R)-3-(4-methylphenyl)-4-nitro-5-phenylpyrrolidine-2-carboxylate
• CAS: 1350971-13-9
• 化学式: C₁₉H₂₀N₂O₄
• 分子量: 340.379
• InChiKey: KKEGSNZNIGMJQT-TVFCKZIOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  25
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.32
• 拓扑面积：
  84.2
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 二氯甲烷 为溶剂， 反应 5.0h， 生成 (2R,3R,4S,5R)-methyl 4-nitro-5-phenyl-3-(p-tolyl)-pyrrolidine-2-carboxylate
  参考文献：
  名称：

  甘氨酸（酮）亚胺催化不对称共轭加成反应中的立体发散性

  摘要：

  已经使用衍生自多齿氨基醇 (1) 的各种手性催化剂系统实现了甘氨酸（酮）亚胺与硝基烯烃的立体发散催化不对称共轭反应。N-金属化偶氮甲碱叶立德的 [3 + 2] 环加成反应的逐步性质也已通过从各自的 Syn-4 和 anti-7 共轭加成产物对 exo-5 和 end-8 进行高度对映和非对映选择性合成得到证明以一锅串联方式。

  DOI：

  10.1021/ja2100356

文献信息

• A Highly Enantioselective Copper/Phosphoramidite-Thioether-Catalyzed Diastereodivergent 1,3-Dipolar Cycloaddition of Azomethine Ylides and Nitroalkenes
  作者：Bin Feng、Jia-Rong Chen、Yun-Fang Yang、Bin Lu、Wen-Jing Xiao

  DOI：10.1002/chem.201705301

  日期：2018.2.1

  full control of the absolute and relative stereochemical configurations. Here, we report the application of our previously developed modular phosphoramidite‐thioether ligands for the copper‐catalyzed diastereodivergent asymmetric 1,3‐dipolar cycloaddition of azomethine ylides and nitroalkenes. Our catalytic system enables wide substrate scope, great stereochemical control, and high reaction efficiency

  与通过简单地在一对对映异构体或假对映异构体手性催化剂之间进行选择而能够获得手性产物的任何对映异构体的大量催化系统相反，几乎没有类似的有效方案可用于合成带有多个立体中心且能完全控制手性的化合物。绝对和相对立体化学构型。在这里，我们报道了我们先前开发的模块化亚磷酰胺-硫醚配体在铜催化的非对映异构体不对称的1,3-偶极环加成反应中的亚甲亚胺烷基化物和硝基烯烃的应用。我们的催化系统可实现广泛的底物范围，出色的立体化学控制和高反应效率。
• Aromatic Amide-Derived Non-Biaryl Atropisomers as Highly Efficient Ligands in Silver-Catalyzed Asymmetric Cycloaddition Reactions
  作者：Xing-Feng Bai、Tao Song、Zheng Xu、Chun-Gu Xia、Wei-Sheng Huang、Li-Wen Xu

  DOI：10.1002/anie.201501100

  日期：2015.4.20

  enantioselective strategy for the synthesis of optically pure nitro‐substituted pyrrolidines. In addition, the experimental results with regard to the carbon stereogenic center as well as the amide stereochemistry confirmed the potential of hemilabile atropisomers as chiral ligand in catalytic asymmetric [3+2] cycloaddition reaction.

  报道了一系列具有膦基和多个立体中心的芳族酰胺衍生的非二芳基阻转异构体的合成。新型膦配体具有很高的非对映选择性和对映选择性（高达> 99：1 dr，95–99％ee），以及在银催化的亚氨基酯与硝基烯烃的不对称[3 + 2]环加成反应中的产率，具有很高的非对映选择性和对映选择性。光学纯硝基取代的吡咯烷类化合物的对映选择性策略。另外，关于碳立体生成中心以及酰胺立体化学的实验结果证实了半不稳定的阻转异构体在催化不对称[3 + 2]环加成反应中作为手性配体的潜力。
• Efficient Diastereo- and Enantioselective Synthesis of<i>exo</i>-Nitroprolinates by 1,3-Dipolar Cycloadditions Catalyzed by Chiral Phosphoramidite⋅Silver(I) Complexes
  作者：Luis M. Castelló、Carmen Nájera、José M. Sansano、Olatz Larrañaga、Abel de Cózar、Fernando P. Cossío

  DOI：10.1002/adsc.201400563

  日期：2014.12.15

  AbstractChiral complexes formed by privileged phosphoramidites and silver triflate or silver benzoate are excellent catalysts for the general 1,3‐dipolar cycloaddition between azomethine ylides generated from α‐amino acid‐derived imino esters and nitroalkenes affording with high dr the exo‐cycloadducts 4,5‐trans‐2,5‐cis‐4‐nitroprolinates in high ee at room temperature. In general, better results are obtained using silver rather than copper(II) complexes. In many cases the exo‐cycloadducts can be obtained in enantiomerically pure form just after simple recrystallization. The mechanism and the justification of the experimentally observed stereodiscrimination of the process are supported by DFT calculations. These enantiomerically enriched exo‐nitroprolinates can be used as reagents for the synthesis of nitropiperidines, by ester reduction and ring expansion, which are inhibitors of farnesyltransferase.magnified image
• Origins of the Loss of Concertedness in Pericyclic Reactions:  Theoretical Prediction and Direct Observation of Stepwise Mechanisms in [3 + 2] Thermal Cycloadditions
  作者：Silvia Vivanco、Begoña Lecea、Ana Arrieta、Pilar Prieto、Iñaki Morao、Anthony Linden、Fernando P. Cossío

  DOI：10.1021/ja9945360

  日期：2000.6.1

  Several [3 + 2] thermal cycloadditions between azomethine ylides and nitroalkenes have been studied both theoretically and experimentally. When the N metalated 1,3-dipoles are used, the reaction is stepwise. The corresponding zwitterionic intermediates have been located computationally and observed by NMR monitoring. In the case of N-unsubstituted azomethine ylides, the reaction can be concerted or stepwise, depending upon the ability of the substituents to stabilize zwitterionic intermediates. A general model is proposed to explain the observed phenomena. This simple model can be extended to other thermal cycloadditions to predict the stepwise or concerted nature of their mechanisms without computing complete reaction coordinates.