(R)-tert-butyl 1-(4-methoxyphenyl)-2-nitroethylcarbamate

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: (R)-tert-butyl 1-(4-methoxyphenyl)-2-nitroethylcarbamate
• 英文别名: tert-butyl N-[(1R)-1-(4-methoxyphenyl)-2-nitroethyl]carbamate
• 化学式: C₁₄H₂₀N₂O₅
• 分子量: 296.323
• InChiKey: SLYQIXOPOOKQSY-LBPRGKRZSA-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：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  93.4
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  tert-butyl (4-methoxyphenyl)(phenylsulfonyl)methylcarbamate 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 1-(4-methoxyphenyl)-2-nitroethylcarbamate
  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。
• Modular Bifunctional Chiral Thioureas as Versatile Organocatalysts for Highly Enantioselective Aza-Henry Reaction and Michael Addition
  作者：Hua Li、Xu Zhang、Xin Shi、Nan Ji、Wei He、Shengyong Zhang、Bangle Zhang

  DOI：10.1002/adsc.201200144

  日期：2012.8.13

  A series of new modular bifunctional chiral thiourea organocatalysts were synthesized from natural Cinchona alkaloids and amino acids, and their performance in the aza-Henry reaction of nitroalkanes to imines, the Michael addition of acetylacetone to nitroolefins and the Michael addition of acetone to nitroolefins was investigated. Under the mild conditions, the important building blocks β-nitro amines

  由天然金鸡纳生物碱和氨基酸合成了一系列新型的模块式双功能手性硫脲有机催化剂，研究了它们在硝基烷烃向亚胺的氮杂-亨利反应，乙酰丙酮到硝基烯烃的迈克尔加成反应以及丙酮到硝基烯烃的迈克尔加成反应中的性能。 。在温和的条件下，可以以高收率（高达95％），出色的对映选择性（高达99％ee）和非对映选择性（高达17：1）获得重要的构建基β-硝基胺和γ-硝基羰基化合物。。
• Enantioselective aza-Henry reaction using cinchona organocatalysts
  作者：Luca Bernardi、Francesco Fini、Raquel P. Herrera、Alfredo Ricci、Valentina Sgarzani

  DOI：10.1016/j.tet.2005.09.076

  日期：2006.1

  The aza-Henry reaction of imines with nitromethane was promoted by cinchona alkaloids and modified cinchona bases to give optically active β-nitroamines. Various N-protected imines were examined as substrates. N-Boc, N-Cbz, and N-Fmoc protected imines gave the best results in terms of chemical yields and enantioselectivities. After a careful screening of a series of chiral bases, very good enantioselectivities

  金鸡纳生物碱和修饰的金鸡纳碱可促进亚胺与硝基甲烷的aza-Henry反应，从而生成光学活性的β-硝胺。检查了各种N-保护的亚胺作为底物。ñ -Boc，ñ -Cbz和ñ -Fmoc保护亚胺的结果最好的化学产率和对映选择性的条款。在仔细筛选一系列手性碱后，使用金鸡纳基硫脲有机催化剂在优化的反应条件下获得了高达94％ee的良好对映选择性。
• 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。