t-butyl 1-azido-2-oxocyclopentanecarboxylate | 1381800-82-3

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: t-butyl 1-azido-2-oxocyclopentanecarboxylate
• 英文别名: tert-butyl 1-azido-2-oxocyclopentane-1-carboxylate
• CAS: 1381800-82-3
• 化学式: C₁₀H₁₅N₃O₃
• 分子量: 225.247
• InChiKey: HOIYKVRHRPZOPZ-SNVBAGLBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.13
• 重原子数：
  16.0
• 可旋转键数：
  2.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  92.13
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  t-butyl 1-azido-2-oxocyclopentanecarboxylate 在 10 % Pd-BaSO4 作用下， 以 甲醇 为溶剂， 以93%的产率得到t-butyl 1-amino-2-oxocyclopentanecarboxylate
  参考文献：
  名称：

  Highly Enantioselective Chlorination of β-Keto Esters and Subsequent S_N2 Displacement of Tertiary Chlorides: A Flexible Method for the Construction of Quaternary Stereogenic Centers

  摘要：

  Highly enantioselective chlorination of beta-oxo esters and subsequent stereospecific substitution of tertiary chlorides are described. Enantioselective chlorination of beta-keto esters and malonates was performed using a chiral Lewis acid catalyst prepared from Cu(OTf)(2) and the newly developed spirooxazoline ligand 2 to yield the desired a-chlorinated products with high enantioselectivity (up to 98% ee). Nucleophilic substitution of the resulting chlorides proceeded smoothly to afford a variety of chiral molecules such as alpha-amino, alpha-allcylthio, and alpha-fluoro esters, without loss of enantiopurity. The results of X-ray crystallographic analysis proved that Walden inversion occurs at the chlorinated tertiary carbon center. These results supported the fact that the substitution proceeds via an S(N)2 mechanism.

  DOI：

  10.1021/ja304806j
• 作为产物：
  描述：

  tert-butyl 2-oxocyclopentanecarboxylate 在 N-氯代丁二酰亚胺 、 sodium azide 、 (R)-Spymox 、 copper(II) bis(trifluoromethanesulfonate) 作用下， 以 二甲基亚砜 、 苯 为溶剂， 反应 2.0h， 生成 t-butyl 1-azido-2-oxocyclopentanecarboxylate
  参考文献：
  名称：

  Highly Enantioselective Chlorination of β-Keto Esters and Subsequent S_N2 Displacement of Tertiary Chlorides: A Flexible Method for the Construction of Quaternary Stereogenic Centers

  摘要：

  Highly enantioselective chlorination of beta-oxo esters and subsequent stereospecific substitution of tertiary chlorides are described. Enantioselective chlorination of beta-keto esters and malonates was performed using a chiral Lewis acid catalyst prepared from Cu(OTf)(2) and the newly developed spirooxazoline ligand 2 to yield the desired a-chlorinated products with high enantioselectivity (up to 98% ee). Nucleophilic substitution of the resulting chlorides proceeded smoothly to afford a variety of chiral molecules such as alpha-amino, alpha-allcylthio, and alpha-fluoro esters, without loss of enantiopurity. The results of X-ray crystallographic analysis proved that Walden inversion occurs at the chlorinated tertiary carbon center. These results supported the fact that the substitution proceeds via an S(N)2 mechanism.

  DOI：

  10.1021/ja304806j

文献信息

• Chemo‐ and Enantioselective Oxidative α‐Azidation of Carbonyl Compounds
  作者：Muhammet Uyanik、Naoto Sahara、Mayuko Tsukahara、Yuhei Hattori、Kazuaki Ishihara

  DOI：10.1002/anie.202007552

  日期：2020.9.21

  We report high‐performance I+/H2O2 catalysis for the oxidative or decarboxylative oxidative α‐azidation of carbonyl compounds by using sodium azide under biphasic neutral phase‐transfer conditions. To induce higher reactivity especially for the α‐azidation of 1,3‐dicarbonyl compounds, we designed a structurally compact isoindoline‐derived quaternary ammonium iodide catalyst bearing electron‐withdrawing

  我们报告了在双相中性相转移条件下使用叠氮化钠对羰基化合物进行氧化或脱羧氧化α-叠氮化的高性能I + / H 2 O 2催化。为了诱导更高的反应活性，尤其是对于1,3-二羰基化合物的α-叠氮化，我们设计了结构紧凑的异吲哚啉衍生的带有吸电子基团的季碘化铵催化剂。I + / H 2 O 2的非生产性分解途径催化量可以通过使用催化量的自由基捕获剂来抑制。这种氧化偶合耐受各种官能团，可以很容易地应用于结构多样的复杂分子的后期α-叠氮化。此外，我们实现了1,3-二羰基化合物的对映选择性α-叠氮化，这是手性次碘酸盐催化剂与对映选择性分子间氧化偶联的第一个成功实例。