3,4-diethyl-1,2,5-trimethylpyrrole | 137596-48-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯
• 英文名称: 3,4-diethyl-1,2,5-trimethylpyrrole
• CAS: 137596-48-6
• 化学式: C₁₁H₁₉N
• 分子量: 165.279
• InChiKey: FBZHGLAFDIPXFU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.64
• 拓扑面积：
  4.9
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  racem. 3,4-diethyl-hexane-2,5-dione 、 甲胺 以 氯仿 为溶剂， 生成 3,4-diethyl-1,2,5-trimethylpyrrole
  参考文献：
  名称：

  Intermediates in the Paal-Knorr synthesis of pyrroles

  摘要：

  The mechanism of Paal-Knorr reaction between a 1,4-dicarbonyl compound and ammonia or a primary amine to form a pyrrole is explored. In aprotic solvents and in aqueous solutions near neutrality, d,l diastereomers of 3,4-dimethyl- and 3,4-diethyl-2,5-hexanediones (1r and 2r) formed pyrroles 1.3-57.0 times faster than the corresponding meso diastereomers (1m and 2m). This contradicts any intermediate, such as the enamine 15, which does not remain saturated at both the 3- and 4-positions through the rate-determining step. The demonstrated stereoisomeric difference in reactivity coupled with the following results support the hemiaminal (9) as the intermediate undergoing cyclization in the rate-limiting step of the Paal-Knorr reaction: (1) The reaction rate was adversely affected by increase in the size of the alkyl substituents on the dione. (2) Racemic 2,3-dimethyl-1,4-diphenyl-1,4-butanedione (3r) was more reactive toward ammonium acetate (2.2:1) and 2-aminoethanol (11.2:1) than the meso isomer (3m), ruling out the involvement of the less substituted enamine 14. (3) The relative rate of pyrrole formation of 1,4-diphenyl-1,4-butanedione (5) and its dimethoxy (6) and dinitro (7) derivatives (1:03:6) does not support cyclization of the imine (11) to the pyrrolinium ion (12). (4) The rates of reaction of 2,2,3,3-tetradeuterio-1,4-diphenyl-1,4-butanedione (5D) and perdeuterio-2,5-hexanedione (4D) were very close to those of unlabeled diketones, indicating the absence of a primary isotope effect in the reaction. (5) Neither the isomerization of the unreacted diastereomers of 1, 2, and 3 nor hydrogen exchange of 4D and 5D was detected during the reaction.

  DOI：

  10.1021/jo00024a040

文献信息

• ORGANIC ELECTROLUMINESCENCE ELEMENT, LIGHTING DEVICE AND DISPLAY DEVICE
  申请人：Katakura Rie

  公开号：US20100045171A1

  公开（公告）日：2010-02-25

  Disclosed is an organic electroluminescent device having high external quantum efficiency and long emission life. Also disclosed are an illuminating device and a display, each comprising such an organic electroluminescent device. The organic electroluminescent device is characterized by comprising at least an anode and a cathode on a supporting substrate, while having at least one light-emitting layer between the anode and the cathode. The organic electroluminescent device is also characterized by containing a polymer which at least partially contains a compound A having a partial structure represented by the general formula (a) below and a reactive group, and is obtained by polymerizing the compound A through the reactive group. (In the formula, Ar1 and Ar2 respectively represent an aromatic ring.)
• ORGANIC ELECTROLUMINESCENCE ELEMENT, NEW COMPOUND FOR THE SAME, DISPLAY DEVICE AND LIGHTING DEVICE USING THE SAME
  申请人：KATAKURA Rie

  公开号：US20110006670A1

  公开（公告）日：2011-01-13

  Disclosed is an organic electroluminescence element comprising an anode, a cathode and a plurality of organic compound layers between the anode and the cathode, provided that one of the organic compound layers is a light emitting layer containing a phosphorescence emitting compound, wherein at least one of the organic compound layers contains a compound represented by Formula (1), wherein, X represents O or S; Y 1 to Y 3 each represents a hydrogen atom, a substituent or a group represented by Formula (A) disclosed in the specification, provided that at least two of Y 1 to Y 3 are groups represented by Formula (A), not all of Y 1 to Y 3 are the same group, and at least one of the groups represented by Formula (A) has Ar of a carbazolyl group, or an azacarbazolyl group containing 2 to 5 nitrogen atoms.
• US8852757B2
  申请人：——

  公开号：US8852757B2

  公开（公告）日：2014-10-07
• US9617255B2
  申请人：——

  公开号：US9617255B2

  公开（公告）日：2017-04-11
• Intermediates in the Paal-Knorr synthesis of pyrroles
  作者：Venkataraman Amarnath、Douglas C. Anthony、Kalyani Amarnath、William M. Valentine、Lawrence A. Wetterau、Doyle G. Graham

  DOI：10.1021/jo00024a040

  日期：1991.11

  The mechanism of Paal-Knorr reaction between a 1,4-dicarbonyl compound and ammonia or a primary amine to form a pyrrole is explored. In aprotic solvents and in aqueous solutions near neutrality, d,l diastereomers of 3,4-dimethyl- and 3,4-diethyl-2,5-hexanediones (1r and 2r) formed pyrroles 1.3-57.0 times faster than the corresponding meso diastereomers (1m and 2m). This contradicts any intermediate, such as the enamine 15, which does not remain saturated at both the 3- and 4-positions through the rate-determining step. The demonstrated stereoisomeric difference in reactivity coupled with the following results support the hemiaminal (9) as the intermediate undergoing cyclization in the rate-limiting step of the Paal-Knorr reaction: (1) The reaction rate was adversely affected by increase in the size of the alkyl substituents on the dione. (2) Racemic 2,3-dimethyl-1,4-diphenyl-1,4-butanedione (3r) was more reactive toward ammonium acetate (2.2:1) and 2-aminoethanol (11.2:1) than the meso isomer (3m), ruling out the involvement of the less substituted enamine 14. (3) The relative rate of pyrrole formation of 1,4-diphenyl-1,4-butanedione (5) and its dimethoxy (6) and dinitro (7) derivatives (1:03:6) does not support cyclization of the imine (11) to the pyrrolinium ion (12). (4) The rates of reaction of 2,2,3,3-tetradeuterio-1,4-diphenyl-1,4-butanedione (5D) and perdeuterio-2,5-hexanedione (4D) were very close to those of unlabeled diketones, indicating the absence of a primary isotope effect in the reaction. (5) Neither the isomerization of the unreacted diastereomers of 1, 2, and 3 nor hydrogen exchange of 4D and 5D was detected during the reaction.