(R)-tert-butyl 2-nitro-1-p-tolylethylcarbamate

• 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: (R)-tert-butyl 2-nitro-1-p-tolylethylcarbamate
• 英文别名: tert-butyl N-[(1R)-1-(4-methylphenyl)-2-nitroethyl]carbamate
• 化学式: C₁₄H₂₀N₂O₄
• 分子量: 280.324
• InChiKey: PHGUMNAIKWJNAH-LBPRGKRZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  20
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  84.2
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  tert-butyl (phenylsulfonyl(p-tolyl)methyl)carbamate 在 4 A molecular sieve N-甲基麻黄碱 、 zinc trifluoromethanesulfonate 、 potassium carbonate 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 为溶剂， 反应 17.0h， 生成 (R)-tert-butyl 2-nitro-1-p-tolylethylcarbamate
  参考文献：
  名称：

  Zn（II）和N-甲基麻黄碱辅助的对映选择性aza-Henry反应。

  摘要：

  DOI：

  10.1002/anie.200502674

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。
• Oxazoline-Thiourea as a Bifunctional Organocatalyst: Enantioselective aza-Henry Reactions
  作者：Yu-wei Chang、Jing-jun Yang、Jin-ning Dang、Yue-xia Xue

  DOI：10.1055/s-2007-984916

  日期：——

  Bifunctional oxazoline-thiourea-based organocatalysts were synthesized and applied to the aza-Henry reactions between N-Boc aryl imines and nitromethane in high ee and chemical yields at room temperature.

  合成了基于恶唑啉-硫脲的双功能有机催化剂，并将其应用于 N-Boc 芳基亚胺与硝基甲烷之间的 aza-Henry 反应，在室温下具有高 ee 和化学产率。
• A Novel Bis-Thiourea Organocatalyst for the Asymmetric Aza-Henry Reaction
  作者：Constantinos Rampalakos、William D. Wulff

  DOI：10.1002/adsc.200800214

  日期：2008.8.4

  A novel bis-thiourea BINAM-based catalyst for the asymmetric aza-Henry reaction has been developed. This catalyst promotes the reaction of N-Boc imines with nitroalkanes to afford beta-nitroamines with good yields and high enantioselectivities. This catalyst has the advantage that it can be prepared in a single step from commercially available materials. A model is proposed for the catalyst action

  已经开发了一种用于不对称氮杂-亨利反应的新型双硫脲 BINAM 基催化剂。这种催化剂促进了 N-Boc 亚胺与硝基烷烃的反应，以提供具有良好收率和高对映选择性的 β-硝基胺。这种催化剂的优点是它可以由市售材料一步制备。提出了一种催化剂作用模型，其中反应的两种组分通过氢键同时活化。不管机理如何，本催化剂的成功证明了双硫脲作为一类有趣的相对未开发的催化剂的潜力。
• Bottom-Up Synthesis of Supported Thioureas and Their Use in Enantioselective Solvent-Free Aza-Henry and Michael Additions
  作者：José M. Andrés、Noelia de La Cruz、María Valle、Rafael Pedrosa

  DOI：10.1002/cplu.201500476

  日期：2016.1

  Two sets of supported chiral thioureas, which differ in the length of the tether that connects the chiral appendage to the polymer structure and the effective functionalization, have been prepared by copolymerization of styrene, novel styryl thioureas derived from l-valine, and divinylbenzene. The efficiency of these polymeric thioureas has been tested in two different enantioselective transformations

  通过苯乙烯，衍生自1-缬氨酸的新型苯乙烯基硫脲和二乙烯基苯的共聚制备了两组支持的手性硫脲，它们的连接手性附件与聚合物结构的束缚带的长度不同，并且有效官能化不同。在纯净的反应条件下，已通过两种不同的对映选择性转化，即氮杂-亨利和硝基-迈克尔反应，对这些聚合硫脲的效率进行了测试。所获得的结果表明，可以再循环硫脲，并且它们能够在低催化剂负载下以良好的对映选择性促进反应。
• Asymmetric Phase-Transfer Catalysts Bearing Multiple Hydrogen-Bonding Donors: Highly Efficient Catalysts for Enantio- and Diastereoselective Nitro-Mannich Reaction of Amidosulfones
  作者：Bin Wang、Yuxin Liu、Cong Sun、Zhonglin Wei、Jungang Cao、Dapeng Liang、Yingjie Lin、Haifeng Duan

  DOI：10.1021/ol503264n

  日期：2014.12.19

  Bifunctional asymmetric phase-transfer catalysts bearing multiple hydrogen-bonding donors have rarely been explored. The first quaternary ammonium type of these catalysts derived from cinchona alkaloids were readily prepared and found to be highly efficient catalysts for asymmetric nitro-Mannich reactions of amidosulfones. Compared with previous reports, very broad substrate generality was observed

  很少研究带有多个氢键供体的双官能不对称相转移催化剂。这些衍生自金鸡纳生物碱的催化剂的第一季铵类型很容易制备，并且发现它们是用于酰胺砜的不对称硝基-曼尼希反应的高效催化剂。与以前的报告相比，观察到非常广泛的底物通用性，并且该产品的两种对映异构体均实现了高对映体和非对映体选择性（90–99％ee，13：1至99：1 dr）。