DL-N-(4-methoxybenzoyl)norleucine | 34337-16-1

• 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: DL-N-(4-methoxybenzoyl)norleucine
• 英文别名: N-(4-methoxybenzoyl)-DL-norleucine；N-p-anisoyl-DL-norleucine；N-p-anisoyl norleucine；2-[(4-Methoxybenzoyl)amino]hexanoic acid
• CAS: 34337-16-1
• 化学式: C₁₄H₁₉NO₄
• mdl: MFCD12635839
• 分子量: 265.309
• InChiKey: SBWDATPLLQESBF-UHFFFAOYSA-N

物化性质

• 熔点：
  135-138 °C
• 沸点：
  478.2±30.0 °C(Predicted)
• 密度：
  1.146±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  19
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.428
• 拓扑面积：
  75.6
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  DL-N-(4-methoxybenzoyl)norleucine 在 N-((2S,3R)-3-(tert-butyldiphenylsilyloxy)-1-(diphenylphosphino)butan-2-yl)-4-methylbenzenesulfonamide 、 N,N'-二环己基碳二亚胺 作用下， 以 二氯甲烷 、 甲苯 为溶剂， 反应 48.0h， 生成 (R,E)-tert-butyl 4-(4-butyl-2-(4-methoxyphenyl)-5-oxo-4,5-dihydrooxazol-4-yl)but-2-enoate
  参考文献：
  名称：

  Regiodivergent Enantioselective γ-Additions of Oxazolones to 2,3-Butadienoates Catalyzed by Phosphines: Synthesis of α,α-Disubstituted α-Amino Acids and N,O-Acetal Derivatives

  摘要：

  Phosphine-catalyzed regiodivergent enantioselective C-2- and C-4-selective gamma-additions of oxazolones to 2,3-butadienoates have been developed. The C-4-selective gamma-addition of oxazolones occurred in a highly enantioselective manner when 2-aryl-4-alkyloxazol-5-(4H)-ones were employed as pronudeophiles. With the employment of 2-alkyl-4-aryloxazol-5-(4H)-ones as the donor, C-2-selective gamma-addition of oxazolones took place in a highly enantioselective manner. The C-4-selective adducts provided rapid access to optically enriched alpha,alpha-disubstituted alpha-amino acid derivatives, and the C-2-selective products led to facile synthesis of chiral N,O-acetals and gamma-lactols. Theoretical studies via DFT calculations suggested that the origin of the observed regioselectivity was due to the distortion energy that resulted from the interaction between the nudeophilic oxazolide and the electrophilic phosphonium intermediate.

  DOI：

  10.1021/jacs.5b10524
• 作为产物：
  描述：

  DL-正亮氨酸 在 氯化亚砜 、 三乙胺 、 sodium hydroxide 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 生成 DL-N-(4-methoxybenzoyl)norleucine
  参考文献：
  名称：

  Regiodivergent Enantioselective γ-Additions of Oxazolones to 2,3-Butadienoates Catalyzed by Phosphines: Synthesis of α,α-Disubstituted α-Amino Acids and N,O-Acetal Derivatives

  摘要：

  Phosphine-catalyzed regiodivergent enantioselective C-2- and C-4-selective gamma-additions of oxazolones to 2,3-butadienoates have been developed. The C-4-selective gamma-addition of oxazolones occurred in a highly enantioselective manner when 2-aryl-4-alkyloxazol-5-(4H)-ones were employed as pronudeophiles. With the employment of 2-alkyl-4-aryloxazol-5-(4H)-ones as the donor, C-2-selective gamma-addition of oxazolones took place in a highly enantioselective manner. The C-4-selective adducts provided rapid access to optically enriched alpha,alpha-disubstituted alpha-amino acid derivatives, and the C-2-selective products led to facile synthesis of chiral N,O-acetals and gamma-lactols. Theoretical studies via DFT calculations suggested that the origin of the observed regioselectivity was due to the distortion energy that resulted from the interaction between the nudeophilic oxazolide and the electrophilic phosphonium intermediate.

  DOI：

  10.1021/jacs.5b10524

文献信息

• Rational Design of 2-Substituted DMAP-<i>N</i>-oxides as Acyl Transfer Catalysts: Dynamic Kinetic Resolution of Azlactones
  作者：Ming-Sheng Xie、Bin Huang、Ning Li、Yin Tian、Xiao-Xia Wu、Yun Deng、Gui-Rong Qu、Hai-Ming Guo

  DOI：10.1021/jacs.0c09075

  日期：2020.11.11

  A novel concept that conversion of chiral 2-substituted DMAP into its DMAP-N-oxide could significantly enhance the catalytic activity and still be used as an acyl transfer catalyst is presented. A new type of chiral 2-substituted DMAP-N-oxides, derived from l-prolinamides, has been rationally designed, facilely synthesized, and applied in the dynamic kinetic resolution of azlactones. Using simple MeOH

  提出了一种新概念，即手性 2-取代 DMAP 转化为其 DMAP-N-氧化物可以显着提高催化活性，并且仍可用作酰基转移催化剂。一种由l-脯氨酰胺衍生的新型手性2-取代DMAP-N-氧化物被合理设计、简便合成并应用于吖内酯的动态动力学拆分。使用简单的甲醇作为亲核试剂，可以高产率（高达 98% 的产率）和对映选择性（高达 96% ee）生产各种 L-氨基酸衍生物。此外，还获得了α-氘标记的l-苯丙氨酸衍生物。实验和 DFT 计算表明，在 2-取代的 DMAP-N-氧化物中，氧原子充当亲核位点，NH 键充当 H 键供体。反应的高对映选择性受空间因素的控制，苯甲酸的加入通过参与氢键的构建降低了活化能。理论化学研究表明，只有充分考虑手性催化剂的攻击方向，才能得到正确的计算结果。这项工作为利用吡啶环的 C2 位置和开发手性 2-取代 DMAP-N-氧化物作为有效的酰基转移催化剂铺平了道路。
• Organic base effects in NHC promoted O- to C-carboxyl transfer; chemoselectivity profiles, mechanistic studies and domino catalysis
  作者：Craig D. Campbell、Christopher J. Collett、Jennifer E. Thomson、Alexandra M. Z. Slawin、Andrew D. Smith

  DOI：10.1039/c1ob05160a

  日期：——

  The O- to C-carboxyl transfer of oxazolyl carbonates promoted by triazolinylidenes, generated in situ with NEt3, shows a markedly different rate and chemoselectivity profile to the same reaction promoted by triazolinylidenes generated using KHMDS. The mechanism of these pathways has been probed through extensive crossover studies to understand this process. The use of NEt3 as a base allows domino multi-step

  由NEt 3原位产生的由三唑啉亚基促进的碳酸恶唑基碳酸酯的O - C羧基转移与由KHMDS生成的三唑啉亚基促进的相同反应显示出明显不同的速率和化学选择性。通过广泛的交叉研究探索了这些途径的机制，以了解这一过程。尽管手性NHC在这些多米诺反应过程中仅产生适度水平的不对称诱导（<15％ee），但使用NEt 3作为碱基可以开发出多米诺骨牌多步反应序列。
• Isothiourea-Catalyzed Enantioselective Carboxy Group Transfer
  作者：Caroline Joannesse、Craig P. Johnston、Carmen Concellón、Carmen Simal、Douglas Philp、Andrew D. Smith

  DOI：10.1002/anie.200904333

  日期：2009.11.9

  Transferable skills: Enantiomerically pure isothioureas promote the O‐ to C‐carboxyl group transfer of oxazolyl carbonates with excellent levels of enantiocontrol (see scheme). The origin of the enantioselectivity of this process was probed mechanistically and rationalized computationally.

  可转移的技能：对映体纯净的异硫脲可促进对苯二甲酰碳酸酯的O-到C-羧基的转移，并具有出色的对映控制水平（参见方案）。机械地探查了该过程的对映选择性的起源，并在计算上进行了合理化。
• Tandem multi-step synthesis of C-carboxyazlactones promoted by N-heterocyclic carbenes
  作者：Craig D. Campbell、Nicolas Duguet、Katherine A. Gallagher、Jennifer E. Thomson、Anita G. Lindsay、AnnMarie C. O’Donoghue、Andrew D. Smith

  DOI：10.1039/b806816j

  日期：——

  Cascade reaction sequences incorporating N-heterocyclic carbene-based organocatalysis have been developed that allow the direct preparation of a range of (±)-4-phenoxycarbonylazlactones in good isolated yields (66–84%) from the corresponding N-p-anisoyl amino acids.

  已开发出结合N-杂环卡宾基础的有机催化的级联反应序列，这些反应序列可以直接从相应的N-p-安尼酰氨基酸制备一系列(±)-4-苯氧基羧基亚内酯，且纯品得率较高（66–84%）。
• Regiodivergent Enantioselective γ-Additions of Oxazolones to 2,3-Butadienoates Catalyzed by Phosphines: Synthesis of α,α-Disubstituted α-Amino Acids and <i>N</i>,<i>O</i>-Acetal Derivatives
  作者：Tianli Wang、Zhaoyuan Yu、Ding Long Hoon、Claire Yan Phee、Yu Lan、Yixin Lu

  DOI：10.1021/jacs.5b10524

  日期：2016.1.13

  Phosphine-catalyzed regiodivergent enantioselective C-2- and C-4-selective gamma-additions of oxazolones to 2,3-butadienoates have been developed. The C-4-selective gamma-addition of oxazolones occurred in a highly enantioselective manner when 2-aryl-4-alkyloxazol-5-(4H)-ones were employed as pronudeophiles. With the employment of 2-alkyl-4-aryloxazol-5-(4H)-ones as the donor, C-2-selective gamma-addition of oxazolones took place in a highly enantioselective manner. The C-4-selective adducts provided rapid access to optically enriched alpha,alpha-disubstituted alpha-amino acid derivatives, and the C-2-selective products led to facile synthesis of chiral N,O-acetals and gamma-lactols. Theoretical studies via DFT calculations suggested that the origin of the observed regioselectivity was due to the distortion energy that resulted from the interaction between the nudeophilic oxazolide and the electrophilic phosphonium intermediate.