5',5'-Bis(methoxycarbonyl)-3,3',4,4'-tetraethylpyrromethane | 159427-98-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯
• 英文名称: 5',5'-Bis(methoxycarbonyl)-3,3',4,4'-tetraethylpyrromethane
• 英文别名: methyl 5-[(3,4-diethyl-5-methoxycarbonyl-1H-pyrrol-2-yl)methyl]-3,4-diethyl-1H-pyrrole-2-carboxylate
• CAS: 159427-98-2
• 化学式: C₂₁H₃₀N₂O₄
• 分子量: 374.48
• InChiKey: AJSOHDIEHOXIPI-UHFFFAOYSA-N

物化性质

• 沸点：
  537.7±50.0 °C(Predicted)
• 密度：
  1.126±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.1
• 重原子数：
  27
• 可旋转键数：
  10
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  84.2
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  聚合甲醛 、 5',5'-Bis(methoxycarbonyl)-3,3',4,4'-tetraethylpyrromethane 在 air 、 lithium chloride 作用下， 以 二甲基亚砜 为溶剂， 反应 2.0h， 以67%的产率得到2,3,7,8,12,13,17,18-octaethyl-21,22-dihydroporphyrin
  参考文献：
  名称：

  Nonionic Superbase-Promoted Synthesis of Oxazoles and Pyrroles: Facile Synthesis of Porphyrins and .alpha.-C-Acyl Amino Acid Esters

  摘要：

  The reaction of acyl chlorides or acid anhydrides with isocyanoacetates in the presence of the superior strong nonionic base P(MeNCH(2)CH(2))(3)N (1) gave oxazoles in 98-99% yield. Treatment of the oxazoles with HCl-MeOH gave alpha-C-acyl amino acid esters in 81-82% yield. The reaction of beta-acetoxy-alpha-nitroalkanes or nitroalkenes with isocyanoacetates in the presence of 1 gave pyrroles in 100% yield. The conjugate acid of 1 can be treated with KO-t-Bu to regenerate 1. Treatment of the pyrroles with LiAlH4, followed by PTSA-CH2(OMe)(2) and oxidation gave porphyrins in 65-69% yield. LiCl, which functions both as a strong nucleophile in the S(N)2 demethylation of the 5,5'-bis(methoxycarbonyl)-3,3',4,4'-tetramethyldipyrromethane 22a and as a Lewis acid in the electrophilic substitution cyclization of paraformaldehyde at dipyrromethane, facilitates the combination of four reactions into a one-pot synthesis of octaethylporphyrin in 67% yield from 22a.

  DOI：

  10.1021/jo00104a041
• 作为产物：
  描述：

  4-硝基-3-己烷基乙酸酯 在 盐酸 P(MeNCH₂CH₂)3N 作用下， 以 四氢呋喃 、 乙醇 、 异丙醇 为溶剂， 反应 2.5h， 生成 5',5'-Bis(methoxycarbonyl)-3,3',4,4'-tetraethylpyrromethane
  参考文献：
  名称：

  Nonionic Superbase-Promoted Synthesis of Oxazoles and Pyrroles: Facile Synthesis of Porphyrins and .alpha.-C-Acyl Amino Acid Esters

  摘要：

  The reaction of acyl chlorides or acid anhydrides with isocyanoacetates in the presence of the superior strong nonionic base P(MeNCH(2)CH(2))(3)N (1) gave oxazoles in 98-99% yield. Treatment of the oxazoles with HCl-MeOH gave alpha-C-acyl amino acid esters in 81-82% yield. The reaction of beta-acetoxy-alpha-nitroalkanes or nitroalkenes with isocyanoacetates in the presence of 1 gave pyrroles in 100% yield. The conjugate acid of 1 can be treated with KO-t-Bu to regenerate 1. Treatment of the pyrroles with LiAlH4, followed by PTSA-CH2(OMe)(2) and oxidation gave porphyrins in 65-69% yield. LiCl, which functions both as a strong nucleophile in the S(N)2 demethylation of the 5,5'-bis(methoxycarbonyl)-3,3',4,4'-tetramethyldipyrromethane 22a and as a Lewis acid in the electrophilic substitution cyclization of paraformaldehyde at dipyrromethane, facilitates the combination of four reactions into a one-pot synthesis of octaethylporphyrin in 67% yield from 22a.

  DOI：

  10.1021/jo00104a041

文献信息

• Nonionic Superbase-Promoted Synthesis of Oxazoles and Pyrroles: Facile Synthesis of Porphyrins and .alpha.-C-Acyl Amino Acid Esters
  作者：Jiansheng Tang、John G. Verkade

  DOI：10.1021/jo00104a041

  日期：1994.12

  The reaction of acyl chlorides or acid anhydrides with isocyanoacetates in the presence of the superior strong nonionic base P(MeNCH(2)CH(2))(3)N (1) gave oxazoles in 98-99% yield. Treatment of the oxazoles with HCl-MeOH gave alpha-C-acyl amino acid esters in 81-82% yield. The reaction of beta-acetoxy-alpha-nitroalkanes or nitroalkenes with isocyanoacetates in the presence of 1 gave pyrroles in 100% yield. The conjugate acid of 1 can be treated with KO-t-Bu to regenerate 1. Treatment of the pyrroles with LiAlH4, followed by PTSA-CH2(OMe)(2) and oxidation gave porphyrins in 65-69% yield. LiCl, which functions both as a strong nucleophile in the S(N)2 demethylation of the 5,5'-bis(methoxycarbonyl)-3,3',4,4'-tetramethyldipyrromethane 22a and as a Lewis acid in the electrophilic substitution cyclization of paraformaldehyde at dipyrromethane, facilitates the combination of four reactions into a one-pot synthesis of octaethylporphyrin in 67% yield from 22a.