4-(3,3-dimethoxypropyl)-6-methyl-2-pyrazol-1-yl-1,4-dihydropyrimidine-5-carboxylic acid ethyl ester | 911857-30-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 4-(3,3-dimethoxypropyl)-6-methyl-2-pyrazol-1-yl-1,4-dihydropyrimidine-5-carboxylic acid ethyl ester
• 英文别名: Ethyl 4-(3,3-dimethoxypropyl)-6-methyl-2-pyrazol-1-yl-1,4-dihydropyrimidine-5-carboxylate
• CAS: 911857-30-2
• 化学式: C₁₆H₂₄N₄O₄
• 分子量: 336.391
• InChiKey: BUBWOLIWKZSGBY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  24
• 可旋转键数：
  9
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  87
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  4-(3,3-dimethoxypropyl)-6-methyl-2-pyrazol-1-yl-1,4-dihydropyrimidine-5-carboxylic acid ethyl ester 在 4-二甲氨基吡啶 、 氨 、 氯化铵 作用下， 以 四氢呋喃 、 二氯甲烷 、 乙腈 为溶剂， 反应 25.0h， 生成 Trifluoro-acetate1-amino-4-ethoxycarbonyl-7-methoxy-3-methyl-4a,5,6,7-tetrahydro-2H-pyrrolo[1,2-c]pyrimidin-8-ylium;
  参考文献：
  名称：

  Concise Synthesis of Guanidine-Containing Heterocycles Using the Biginelli Reaction

  摘要：

  Two general methods for the synthesis of 2-imino-5-carboxy-3,4-dihydropyrimidines were developed using the three-component Biginelli reaction. The first method utilizes pyrazole carboxamidine, a beta-ketoester, and an aldehyde in an initial Biginelli reaction. After Boc protection, these products undergo aminolysis and acidic deprotection to generate 2-imino-5-carboxy-3,4-dihydropyrimidines in a four-step sequence. The second method utilizes a triazone-protected guanidine, a beta-ketoester, and an aldehyde in a Biginelli reaction. Acidic cleavage of the triazone yields 2-imino-5-carboxy-3,4-dihydropyrimidines in a two-step sequence. We also describe the further elaboration of several of these products using a tethered Biginelli reaction to give triazaacenaphthalene structures similar to those found in crambescidin and batzelladine alkaloids.

  DOI：

  10.1021/jo061199m
• 作为产物：
  描述：

  4,4-二甲氧基丁醛 、 乙酰乙酸乙酯 、 1H-吡唑-1-甲脒盐酸盐 在 碳酸氢钠 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 48.0h， 以62%的产率得到4-(3,3-dimethoxypropyl)-6-methyl-2-pyrazol-1-yl-1,4-dihydropyrimidine-5-carboxylic acid ethyl ester
  参考文献：
  名称：

  Concise Synthesis of Guanidine-Containing Heterocycles Using the Biginelli Reaction

  摘要：

  Two general methods for the synthesis of 2-imino-5-carboxy-3,4-dihydropyrimidines were developed using the three-component Biginelli reaction. The first method utilizes pyrazole carboxamidine, a beta-ketoester, and an aldehyde in an initial Biginelli reaction. After Boc protection, these products undergo aminolysis and acidic deprotection to generate 2-imino-5-carboxy-3,4-dihydropyrimidines in a four-step sequence. The second method utilizes a triazone-protected guanidine, a beta-ketoester, and an aldehyde in a Biginelli reaction. Acidic cleavage of the triazone yields 2-imino-5-carboxy-3,4-dihydropyrimidines in a two-step sequence. We also describe the further elaboration of several of these products using a tethered Biginelli reaction to give triazaacenaphthalene structures similar to those found in crambescidin and batzelladine alkaloids.

  DOI：

  10.1021/jo061199m

文献信息

• Concise Synthesis of Guanidine-Containing Heterocycles Using the Biginelli Reaction
  作者：Bradley L. Nilsson、Larry E. Overman

  DOI：10.1021/jo061199m

  日期：2006.9.1

  Two general methods for the synthesis of 2-imino-5-carboxy-3,4-dihydropyrimidines were developed using the three-component Biginelli reaction. The first method utilizes pyrazole carboxamidine, a beta-ketoester, and an aldehyde in an initial Biginelli reaction. After Boc protection, these products undergo aminolysis and acidic deprotection to generate 2-imino-5-carboxy-3,4-dihydropyrimidines in a four-step sequence. The second method utilizes a triazone-protected guanidine, a beta-ketoester, and an aldehyde in a Biginelli reaction. Acidic cleavage of the triazone yields 2-imino-5-carboxy-3,4-dihydropyrimidines in a two-step sequence. We also describe the further elaboration of several of these products using a tethered Biginelli reaction to give triazaacenaphthalene structures similar to those found in crambescidin and batzelladine alkaloids.