methyl [5,6,7,8-tetrahydro-4-oxo-5-[2-(pyridin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carboxylate | 251553-58-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: methyl [5,6,7,8-tetrahydro-4-oxo-5-[2-(pyridin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carboxylate
• 英文别名: methyl 4-oxo-5-(2-pyridin-4-ylethyl)-7,8-dihydro-6H-pyrazolo[1,5-a][1,4]diazepine-2-carboxylate
• CAS: 251553-58-9
• 化学式: C₁₆H₁₈N₄O₃
• 分子量: 314.344
• InChiKey: ALCIUYFVAVWAER-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  23
• 可旋转键数：
  5
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  77.3
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  methyl [5,6,7,8-tetrahydro-4-oxo-5-[2-(pyridin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carboxylate 在 sodium hydroxide 作用下， 以 水 为溶剂， 反应 1.0h， 生成 [5,6,7,8-tetrahydro-4-oxo-5-[2-(pyridin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carboxylic acid
  参考文献：
  名称：

  A Highly Convergent Synthesis of a Fibrinogen Receptor Antagonist

  摘要：

  A practical multikilogram synthesis of 2(S)-[(p-toluenesulfonyl)amino]-3-[[[5,6,7,8-tetrahydro-4-oxo-5-[2-(piperidin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carbonyl]amino]propionic acid pentahydrate (1), an oral fibrinogen receptor antagonist, is described. The nine-step convergent process, which afforded 1 in 37% overall yield, included pyrazole 5a and N-tosylaminoalanine 16 as key fragments. Pyrazole 5a was obtained from pyrazole-3,5-dicarboxylic acid by esterification with MeOH, alkylation/cyclization with 3-bromopropylamine, and Michael addition with 4-vinylpyridine. N-Tosylaminoalanine 16 was prepared by tosylation of asparagine, Hofmann reaction, and benzyl esterification. Saponification of pyrazole 5a, coupling of the acid with N-tosylaminoalanine 16, and Pd-catalyzed hydrogenolysis and pyridine reduction completed the synthesis.

  DOI：

  10.1021/jo990644t
• 作为产物：
  描述：

  4-乙烯基吡啶 、 4-氧代-4H,5H,6H,7H,8H-吡唑并[1,5-a][1,4]二氮杂-2-羧酸甲酯 在 N-甲基吲哚酮 、 叔丁醇 作用下， 以 四氢呋喃 为溶剂， 以92%的产率得到methyl [5,6,7,8-tetrahydro-4-oxo-5-[2-(pyridin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carboxylate
  参考文献：
  名称：

  A Highly Convergent Synthesis of a Fibrinogen Receptor Antagonist

  摘要：

  A practical multikilogram synthesis of 2(S)-[(p-toluenesulfonyl)amino]-3-[[[5,6,7,8-tetrahydro-4-oxo-5-[2-(piperidin-4-yl)ethyl]-4H-pyrazolo[1,5-a][1,4]diazepin-2-yl]carbonyl]amino]propionic acid pentahydrate (1), an oral fibrinogen receptor antagonist, is described. The nine-step convergent process, which afforded 1 in 37% overall yield, included pyrazole 5a and N-tosylaminoalanine 16 as key fragments. Pyrazole 5a was obtained from pyrazole-3,5-dicarboxylic acid by esterification with MeOH, alkylation/cyclization with 3-bromopropylamine, and Michael addition with 4-vinylpyridine. N-Tosylaminoalanine 16 was prepared by tosylation of asparagine, Hofmann reaction, and benzyl esterification. Saponification of pyrazole 5a, coupling of the acid with N-tosylaminoalanine 16, and Pd-catalyzed hydrogenolysis and pyridine reduction completed the synthesis.

  DOI：

  10.1021/jo990644t

文献信息

• ¹⁴N to ¹⁵N Isotopic Exchange of Nitrogen Heteroaromatics through Skeletal Editing
  作者：G. Logan Bartholomew、Samantha L. Kraus、Lucas J. Karas、Filippo Carpaneto、Raffeal Bennett、Matthew S. Sigman、Charles S. Yeung、Richmond Sarpong

  DOI：10.1021/jacs.3c11515

  日期：2024.2.7

  selective modification of nitrogen heteroaromatics enables the development of new chemical tools and accelerates drug discovery. While methods that focus on expanding or contracting the skeletal structures of heteroaromatics are emerging, methods for the direct exchange of single core atoms remain limited. Here, we present a method for 14N → 15N isotopic exchange for several aromatic nitrogen heterocycles

  氮杂芳烃的选择性改性使新化学工具的开发成为可能，并加速了药物发现。虽然专注于扩展或收缩杂芳烃骨架结构的方法正在出现，但直接交换单核原子的方法仍然有限。在这里，我们提出了一种对几种芳香族氮杂环进行 14N → 15N 同位素交换的方法。这种氮同位素嬗变是通过氮原子的三飞化激活杂芳烃底物而发生的，然后是由 15个 N-天冬氨酸介导的开环/闭环序列，以实现氮原子的同位素交换。这种转化成功的关键是形成可分离的 15N-琥珀酰中间体，该中间体经过消除以得到同位素标记的杂环。这些转化发生在温和的条件下，化学和同位素产量高。