ethyl 2-(5-formyl-3,4-dimethyl-1H-pyrrol-2-yl)acetate | 125250-19-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2-(5-formyl-3,4-dimethyl-1H-pyrrol-2-yl)acetate
• CAS: 125250-19-3
• 化学式: C₁₁H₁₅NO₃
• 分子量: 209.245
• InChiKey: RWQWBFVALKFBIH-UHFFFAOYSA-N

物化性质

• 沸点：
  337.8±42.0 °C(Predicted)
• 密度：
  1.154±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.55
• 重原子数：
  15.0
• 可旋转键数：
  4.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  59.16
• 氢给体数：
  1.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  ethyl 2-(5-formyl-3,4-dimethyl-1H-pyrrol-2-yl)acetate 在 硫酸 、 氢溴酸 、 copper diacetate 、 三氟乙酸 作用下， 反应 1.58h， 生成 20'-(Ethoxycarbonyl)-20-((methoxycarbonyl)methyl)-2,3,7,8,12,13,17,18-octamethyl-20'-homoporphyrin
  参考文献：
  名称：

  Novel macrocycles from metal-catalyzed oxidative cyclizations of a,c-biladiene salts

  摘要：

  From the metal-promoted oxidative cyclization of several 1,19-disubstituted a,c-biladiene dihydrobromide salts, a number of novel macrocycles were prepared. For example, the cyclization of 1,-19-bis(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-a,c-biladiene dihydrobromide salt (10) with copper(II) acetate afforded copper(II) 20-((methoxycarbonyl)methyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-1,20-dihydroporphyrin (13) (39% yield), which, upon demetalation, yielded the metal-free 20-((methoxycarbonyl)methyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-1,20-dihydroporphyrin (14) (48% yield). With the substrate 19-((ethoxycarbonyl)methyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-a,c-biladiene dihydrobromide (15), the metal-catalyzed cyclization process produced copper(II) 20-(ethoxycarbonyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-1,20-dihydroporphyrin (18) (27 % yield) and copper(II) 20-(ethoxycarbonyl)-2-(2-(methoxycarbonyl)ethyl)-2,7,8,12,13,17,18-heptamethyl-3-methylidene-2,3-dihydroporphyrin (23) (19 % yield). Upon demetalation of the copper dihydroporphyrin 18, 20'-(ethoxycarbonyl)-20-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-20'-homoporphyrin (28) (16.5 % yield) was isolated; demetalation of copper(II) 20-(ethoxycarbonyl)-2-(2-(methoxycarbonyl)ethyl)-2,7,8,12,13,17,18-heptamethyl-3-methylidene-2,3-dihydroporphyrin (23) yielded the free base 20-(ethoxycarbonyl)-2-(2-(methoxycarbonyl)ethyl)-2,7,8,12,13,17,18-heptamethyl-3-methylidene-2,3-dihydroporphyrin (25) (24% yield). Using chromium(III) hydroxy acetate as the oxidant (in place of copper(II)), 1,2,3,7,8,12,13,17,18-nonamethyl-1,20-dihydroporphyrin (5) (55-62%) was obtained from the 1,2,3,7,8,12,13,17,18,19-decamethyl-a,c-biladiene salt 3. Mechanisms of macrocycle formation from a,c-biladiene salts, promoted by either copper(II) or chromium(III), appear to proceed via pathways closely resembling the electrochemical cyclization reaction of 1,19-dimethyl-a,c-biladiene salts.

  DOI：

  10.1021/jo00076a030
• 作为产物：
  描述：

  3,4-dimethyl-pyrrole-2-carboxylic acid benzyl ester 在 palladium on activated charcoal 氢气 、 铜 、 三氯氧磷 作用下， 以 四氢呋喃 、 环己烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 41.58h， 生成 ethyl 2-(5-formyl-3,4-dimethyl-1H-pyrrol-2-yl)acetate
  参考文献：
  名称：

  Novel macrocycles from metal-catalyzed oxidative cyclizations of a,c-biladiene salts

  摘要：

  From the metal-promoted oxidative cyclization of several 1,19-disubstituted a,c-biladiene dihydrobromide salts, a number of novel macrocycles were prepared. For example, the cyclization of 1,-19-bis(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-a,c-biladiene dihydrobromide salt (10) with copper(II) acetate afforded copper(II) 20-((methoxycarbonyl)methyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-1,20-dihydroporphyrin (13) (39% yield), which, upon demetalation, yielded the metal-free 20-((methoxycarbonyl)methyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-1,20-dihydroporphyrin (14) (48% yield). With the substrate 19-((ethoxycarbonyl)methyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-a,c-biladiene dihydrobromide (15), the metal-catalyzed cyclization process produced copper(II) 20-(ethoxycarbonyl)-1-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-1,20-dihydroporphyrin (18) (27 % yield) and copper(II) 20-(ethoxycarbonyl)-2-(2-(methoxycarbonyl)ethyl)-2,7,8,12,13,17,18-heptamethyl-3-methylidene-2,3-dihydroporphyrin (23) (19 % yield). Upon demetalation of the copper dihydroporphyrin 18, 20'-(ethoxycarbonyl)-20-(2-(methoxycarbonyl)ethyl)-2,3,7,8,12,13,17,18-octamethyl-20'-homoporphyrin (28) (16.5 % yield) was isolated; demetalation of copper(II) 20-(ethoxycarbonyl)-2-(2-(methoxycarbonyl)ethyl)-2,7,8,12,13,17,18-heptamethyl-3-methylidene-2,3-dihydroporphyrin (23) yielded the free base 20-(ethoxycarbonyl)-2-(2-(methoxycarbonyl)ethyl)-2,7,8,12,13,17,18-heptamethyl-3-methylidene-2,3-dihydroporphyrin (25) (24% yield). Using chromium(III) hydroxy acetate as the oxidant (in place of copper(II)), 1,2,3,7,8,12,13,17,18-nonamethyl-1,20-dihydroporphyrin (5) (55-62%) was obtained from the 1,2,3,7,8,12,13,17,18,19-decamethyl-a,c-biladiene salt 3. Mechanisms of macrocycle formation from a,c-biladiene salts, promoted by either copper(II) or chromium(III), appear to proceed via pathways closely resembling the electrochemical cyclization reaction of 1,19-dimethyl-a,c-biladiene salts.

  DOI：

  10.1021/jo00076a030

文献信息

• Metal-Catalyzed Oxidative Cyclizations of <i>a</i>,<i>c</i>-Biladiene Salts Bearing 1- and/or 19-Arylmethyl Substituents:  Macrocyclic Products and Their Chemistry
  作者：Jack J. Lin、Kevin R. Gerzevske、Paul A. Liddell、Mathias O. Senge、Marilyn M. Olmstead、Richard G. Khoury、Brent E. Weeth、Stephanie A. Tsao、Kevin M. Smith

  DOI：10.1021/jo9619138

  日期：1997.6.1

  copper(II) 20-(ethoxycarbonyl)-3-methylidene-2,3,7,8,12,13,17,18-octamethyl-2-(p-tolylmethyl)chlorin (44), copper(II) 20-(ethoxycarbonyl)-2-methylidene-2,3,7,8,12,13,17,18-octamethyl-3-(p-tolylmethyl)chlorin (45), and three porphyrins: copper(II) 20-(ethoxycarbonyl)-2,3,7,8,12,13,17,18-octamethylporphyrin (3), copper(II) 2,3,7,8,12,13,17,18-octamethyl-20-p-tolylporphyrin (50), and copper(II) 20-(ethoxycarbonyl)-2

  制备了几种1-单-和1,19-双（对-芳甲基）-a，c-胆二烯盐，并进行了铜（II）-或铬（III）辅助的氧化环化反应，得到了许多产物，其中将1-或19-取代基适应，消除或重排至四吡咯上的其他点。例如，使用19-（（（乙氧羰基）甲基）-2,3,7,8,12,13,17,18-八甲基-19-（对甲苯基甲基）-a，c-的乙酸铜（II）进行环化biladiene dihydrobromide（25）生成铜（II）20-（（乙氧羰基）甲基）-1-（对甲苯基甲基）-2,3,7,8,12,13,17,18-八甲基-1,20-二氢卟啉（42），铜（II）20-（乙氧羰基）-3-亚甲基-2,3,7,8,12,13,17,18-八甲基-2-（对甲苯基甲基）二氢卟酚（44），铜（II）20-（乙氧羰基）-2-亚甲基-2,3,7,8,12,13,17,18-八甲基-3-（对甲苯基甲基）二氢卟酚（45）和三种卟啉：铜（II