N-(2,4,6-trimethylbenzoyl)proline

• 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: N-(2,4,6-trimethylbenzoyl)proline
• 英文别名: (2S)-1-(2,4,6-trimethylbenzoyl)pyrrolidine-2-carboxylic acid
• 化学式: C₁₅H₁₉NO₃
• mdl: MFCD16377042
• 分子量: 261.321
• InChiKey: VLHKQFKIWPQNKC-LBPRGKRZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  19
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.466
• 拓扑面积：
  57.6
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  N-(2,4,6-trimethylbenzoyl)proline 在 N-甲基吗啉 、 三氟乙酸 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 10.5h， 生成 (2S)-N-[2-[[(2S)-pyrrolidine-2-carbonyl]amino]phenyl]-1-(2,4,6-trimethylbenzoyl)pyrrolidine-2-carboxamide
  参考文献：
  名称：

  Highly diastereo- and enantioselective direct aldol reaction under solvent-free conditions

  摘要：

  An efficient, solvent-free protocol for the asymmetric aldol reaction between aldehydes and ketones using prolinamides 1-4 as organocatalysts is reported. Catalysts 2-4, in the presence of TFA (the ratio of catalyst and TFA = 1/1.5), proved to be excellent catalysts, giving the aldol products between aromatic aldehydes and ketones with nearly perfect diastereo- and enantioselectivities (up to >99:1 dr and >99% ee). This catalytic system can also be applied in the cross-aldol reaction of isatin with ketones and the Michael reaction between cyclohexane and nitroalkenes. A mechanism is proposed to account for the formation of the major enantiomer in this reaction. (c) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2013.02.013
• 作为产物：
  描述：

  2,4,6-三甲基苯甲酸 在 氯化亚砜 、 sodium hydroxide 作用下， 以 四氢呋喃 为溶剂， 反应 4.0h， 生成 N-(2,4,6-trimethylbenzoyl)proline
  参考文献：
  名称：

  Enantioselective reduction of ketoimines promoted by easily available (S)-proline derivatives

  摘要：

  研究了易于合成甚至商业可得的（S）-脯氨酸衍生物在氯化三氯硅烷介导的酮肟还原反应中的行为。考虑了一小组结构和电子修饰的的手性Lewis碱；这些化合物能够促进不同底物的对映选择性还原，并得到良好的化学产率。在HSiCl3添加到模型底物N-苯基乙酰苯胺肟的反应中，所选择的有机催化剂导致形成相应的胺，具有很好的立体选择性，最高可达75%的ee值。还进行了理论研究，以阐明立体选择性的来源。

  DOI：

  10.3762/bjoc.9.71

文献信息

• A General Method for the Preparation of 5-Trifluoromethylated Oxazoles from .ALPHA.-Amino Acids.
  作者：Masami KAWASE、Hiroshi MIYAMAE、Teruo KURIHARA

  DOI：10.1248/cpb.46.749

  日期：——

  The reactions of N-acyl-N-benzyl-α-amino acids (1) or N-acylprolines (5) with trifluoroacetic anhydride in the presence of pyridine afford 5-trifluoromethyloxazoles (2 or 7) in good yields. The reaction could proceed through the transient formation of mesoionic 1, 3-oxazolium-5-olates, followed by oxazolium salts.

  在吡啶存在下，N-酰基-N-苄基-α-氨基酸（1）或N-酰基脯氨酸（5）与三氟乙酸酐反应，以良好产率得到5-三氟甲基噁唑（2或7）。该反应可能通过形成暂态的介离子1,3-噁唑-5-醇盐，随后形成噁唑盐盐类而进行。
• Enantioselective reduction of ketoimines promoted by easily available (<i>S</i>)-proline derivatives
  作者：Martina Bonsignore、Maurizio Benaglia、Laura Raimondi、Manuel Orlandi、Giuseppe Celentano

  DOI：10.3762/bjoc.9.71

  日期：——

  The behavior of readily synthesized and even commercially available (S)-proline derivatives, was studied in the trichlorosilane-mediated reduction of ketoimines. A small library of structurally and electronically modified chiral Lewis bases was considered; such compounds were shown to promote the enantioselective reduction of different substrates in good chemical yields. In the HSiCl₃ addition to the model substrate N-phenylacetophenone imine, the organocatalyst of choice led to the formation of the corresponding amine with good stereoselectivity, up to 75% ee. Theoretical studies were also performed in order to elucidate the origin of the stereoselection.

  研究了易于合成甚至商业可得的（S）-脯氨酸衍生物在氯化三氯硅烷介导的酮肟还原反应中的行为。考虑了一小组结构和电子修饰的的手性Lewis碱；这些化合物能够促进不同底物的对映选择性还原，并得到良好的化学产率。在HSiCl3添加到模型底物N-苯基乙酰苯胺肟的反应中，所选择的有机催化剂导致形成相应的胺，具有很好的立体选择性，最高可达75%的ee值。还进行了理论研究，以阐明立体选择性的来源。

• Highly diastereo- and enantioselective direct aldol reaction under solvent-free conditions
  作者：Furen Zhang、Chunmei Li、Chenze Qi

  DOI：10.1016/j.tetasy.2013.02.013

  日期：2013.4

  An efficient, solvent-free protocol for the asymmetric aldol reaction between aldehydes and ketones using prolinamides 1-4 as organocatalysts is reported. Catalysts 2-4, in the presence of TFA (the ratio of catalyst and TFA = 1/1.5), proved to be excellent catalysts, giving the aldol products between aromatic aldehydes and ketones with nearly perfect diastereo- and enantioselectivities (up to >99:1 dr and >99% ee). This catalytic system can also be applied in the cross-aldol reaction of isatin with ketones and the Michael reaction between cyclohexane and nitroalkenes. A mechanism is proposed to account for the formation of the major enantiomer in this reaction. (c) 2013 Elsevier Ltd. All rights reserved.