tert-butyl 2-chloro-6-(diethylamino)isonicotinate | 1365337-42-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: tert-butyl 2-chloro-6-(diethylamino)isonicotinate
• 英文别名: tert-Butyl 2-chloro-6-(diethylamino)isonicotinate；tert-butyl 2-chloro-6-(diethylamino)pyridine-4-carboxylate
• CAS: 1365337-42-3
• 化学式: C₁₄H₂₁ClN₂O₂
• 分子量: 284.786
• InChiKey: DIFYZXUCMOUKJS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.54
• 重原子数：
  19.0
• 可旋转键数：
  4.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  42.43
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  tert-butyl 2-chloro-6-(diethylamino)isonicotinate 在 盐酸 、 (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride 、 O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、 N,N-二异丙基乙胺 、 sodium hydroxide 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 二氯甲烷 、 水 、 异丙醇 为溶剂， 反应 88.0h， 生成 (S)-N,N-diethyl-4-(3-(3-ethyl-5-methyl-4-(oxiran-2-ylmethoxy)phenyl)-1,2,4-oxadiazol-5-yl)-6-methylpyridin-2-amine
  参考文献：
  名称：

  Novel S1P₁ Receptor Agonists − Part 3: From Thiophenes to Pyridines

  摘要：

  In preceding communications we summarized our medicinal chemistry efforts leading to the identification of potent, selective, and orally active S1P(1) agonists such as the thiophene derivative 1. As a continuation of these efforts, we replaced the thiophene in 1 by a 2-, 3-, or 4-pyridine and obtained less lipophilic, potent, and selective S1P(1) agonists (e.g., 2) efficiently reducing blood lymphocyte count in the rat. Structural features influencing the compounds' receptor affinity profile and pharmacokinetics are discussed. In addition, the ability to penetrate brain tissue has been studied for several compounds. As a typical example for these pyridine based S1P(1) agonists, compound 53 showed EC50 values of 0.6 and 352 nM for the S1P(1), and S1P(3) receptor, respectively, displayed favorable PK properties, and penetrated well into brain tissue. In the rat, compound 53 maximally reduced the blood lymphocyte count for at least 24 h after oral dosing of 3 mg/kg.

  DOI：

  10.1021/jm4014696
• 作为产物：
  描述：

  2,6-二氯异烟酸 以 甲苯 为溶剂， 生成 tert-butyl 2-chloro-6-(diethylamino)isonicotinate
  参考文献：
  名称：

  Practical and Scalable Synthesis of S1P₁ Receptor Agonist ACT-209905

  摘要：

  A practical and scalable route for the fast delivery of 12 kg of S1P(1) agonist (ACT-209905) has been developed. ACT-209905 is composed of an amino pyridine group, an oxadiazole spacer, a 2-ethyl-5-methylphenol moiety and a chiral 1-amino-2-propanol side chain. The convergent synthesis consists of 16 steps with 9 isolated intermediates and is chromatography-free. Key building blocks are accessed from low-cost starting materials, such as acetone, diethyl oxalate, cyanoacetamide, and 2-ethyl-5-methyl aniline. A Negishi coupling that was troubled by the use of metal reagents and concomitant metal waste streams has been replaced by a less expensive Guareschi-Thorpe reaction to build up an amino isonicotinic acid. The chiral 1-amino-2-propanol moiety was secured by selective ring-opening of an epoxide with lithium hexamethyldisilazide as an ammonia surrogate, thus omitting the notorious double alkylated byproduct.

  DOI：

  10.1021/op200326s