(S)-tert-butyl N-[1-(1-ethyl-1H-pyrazol-4-yl)-3-butenyl]carbamate | 1609247-48-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: (S)-tert-butyl N-[1-(1-ethyl-1H-pyrazol-4-yl)-3-butenyl]carbamate
• CAS: 1609247-48-4
• 化学式: C₁₄H₂₃N₃O₂
• 分子量: 265.356
• InChiKey: ZDSSQJWZVCKPIR-LBPRGKRZSA-N

物化性质

• 沸点：
  391.7±37.0 °C(predicted)
• 密度：
  1.04±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.04
• 重原子数：
  19.0
• 可旋转键数：
  5.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  56.15
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  (S)-tert-butyl N-[1-(1-ethyl-1H-pyrazol-4-yl)-3-butenyl]carbamate 在 N-溴代丁二酰亚胺(NBS) 、 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 以16.667%的产率得到
  参考文献：
  名称：

  Diastereoselective In and Zn-mediated allylation of pyrazol-4-yl derived (R)-tert-butanesulfinyl imines: synthesis of enantiomerically pure 6-(pyrazol-4-yl)-piperidin-2,4-diones

  摘要：

  The In and Zn-mediated allylation of substituted pyrazol-4-yl derived (R)-N-tert-butanesulfinyl imines proceeds with high diastereoselectivity depending on the conditions and additives (up to 99.4% de). Thus, the synthesized diastereomeric homoallylsulfinamides were isolated and characterized as pure diastereomers, which were then converted into the corresponding pyrazol-4-yl-derived N-Boc-homoallylamines via consecutive treatment with HCl and Boc(2)O. The latter were then subjected to a sequence of reactions: cyclobromocarbamation with NBS and enolateisocyanate rearrangement with tBuOK to give novel enantiomerically pure (S)-6-(pyrazol-4-yl)-piperidine-2,4-diones in 88-96% yield. The absolute configurations of the allylation products were assigned by X-ray single crystal analysis of the intermediate bromomethylurethanes. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2014.03.003
• 作为产物：
  描述：

  1-乙基-1H-吡唑-4-甲醛 在 titanium(IV) isopropylate 、 盐酸 、 indium 、 三乙胺 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 38.17h， 生成 (S)-tert-butyl N-[1-(1-ethyl-1H-pyrazol-4-yl)-3-butenyl]carbamate
  参考文献：
  名称：

  Diastereoselective In and Zn-mediated allylation of pyrazol-4-yl derived (R)-tert-butanesulfinyl imines: synthesis of enantiomerically pure 6-(pyrazol-4-yl)-piperidin-2,4-diones

  摘要：

  The In and Zn-mediated allylation of substituted pyrazol-4-yl derived (R)-N-tert-butanesulfinyl imines proceeds with high diastereoselectivity depending on the conditions and additives (up to 99.4% de). Thus, the synthesized diastereomeric homoallylsulfinamides were isolated and characterized as pure diastereomers, which were then converted into the corresponding pyrazol-4-yl-derived N-Boc-homoallylamines via consecutive treatment with HCl and Boc(2)O. The latter were then subjected to a sequence of reactions: cyclobromocarbamation with NBS and enolateisocyanate rearrangement with tBuOK to give novel enantiomerically pure (S)-6-(pyrazol-4-yl)-piperidine-2,4-diones in 88-96% yield. The absolute configurations of the allylation products were assigned by X-ray single crystal analysis of the intermediate bromomethylurethanes. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2014.03.003

文献信息

• Amine adducts of triallylborane as highly reactive allylborating agents for Cu(i)-catalyzed allylation of chiral sulfinylimines
  作者：Michael S. Alexeev、Tatiana V. Strelkova、Michael M. Ilyin、Yulia V. Nelyubina、Ivan A. Bespalov、Michael G. Medvedev、Victor N. Khrustalev、Nikolai Yu. Kuznetsov

  DOI：10.1039/d4ob00291a

  日期：——

  active reagents is an attractive strategy that meets the modern principles of sustainable development of chemistry. In the current study, we for the first time describe the method and general principles of Cu(I)-catalyzed allylation of imines with amine adducts of allylic triorganoboranes. Triallylborane is an extremely reactive compound and cannot be used for the catalytic allylation of imines, whereas

  使用高活性试剂实施选择性催化过程是一种有吸引力的策略，符合化学可持续发展的现代原则。在本研究中，我们首次描述了Cu( I )催化亚胺与烯丙基三有机硼烷胺加合物的烯丙基化反应的方法和一般原理。三烯丙基硼烷是一种极其活泼的化合物，不能用于亚胺的催化烯丙基化，而其胺加合物是理想的催化底物。胺片段的结构成功地平衡了烯丙基硼试剂的安全性、选择性和稳定性，使其在催化烯丙基化反应中表现出高活性，超过任何已知的烯丙基硼烷许多倍。获得的结果得到定量动力学数据和 DFT 计算的支持。该系统的催化功效在亚磺酰亚胺模型（23 个例子）上得到了证明。实现了高达 >99% 的高非对映选择性，包​​括克级合成 2-羟基苯基衍生物。考虑到三烯基硼烷（AAT）的胺加合物的高反应活性和无与伦比的原子经济性，它们可以被认为是Cu（ I ）和其他合适金属催化剂的潜在烯丙基化试剂。