methyl 2-(4-methoxybenzamido)hexanoate | 1055912-69-0

• 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: methyl 2-(4-methoxybenzamido)hexanoate
• CAS: 1055912-69-0
• 化学式: C₁₅H₂₁NO₄
• 分子量: 279.336
• InChiKey: QAJFNQKHPZJXSD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.16
• 重原子数：
  20.0
• 可旋转键数：
  7.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  64.63
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  methyl 2-(4-methoxybenzamido)hexanoate 在 N-((2S,3R)-3-(tert-butyldiphenylsilyloxy)-1-(diphenylphosphino)butan-2-yl)-4-methylbenzenesulfonamide 、 N,N'-二环己基碳二亚胺 、 sodium hydroxide 作用下， 以 甲醇 、 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 作用下， 以 二氯甲烷 为溶剂， 生成 methyl 2-(4-methoxybenzamido)hexanoate
  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

• 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%）。