tert-butyl 2-acetyl-4-oxo-4-phenylbutyrate | 318511-69-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tert-butyl 2-acetyl-4-oxo-4-phenylbutyrate
• 英文别名: Tert-butyl 2-acetyl-4-oxo-4-phenylbutanoate
• CAS: 318511-69-2
• 化学式: C₁₆H₂₀O₄
• 分子量: 276.332
• InChiKey: OSNVRMMFHGCCIY-UHFFFAOYSA-N

物化性质

• 沸点：
  405.6±35.0 °C(Predicted)
• 密度：
  1.087±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  20
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  60.4
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  tert-butyl 2-acetyl-4-oxo-4-phenylbutyrate 在 N-氯代丁二酰亚胺 、 C₃₄H₂₄N₂O 、 copper(II) bis(trifluoromethanesulfonate) 作用下， 以 苯 为溶剂， 以90%的产率得到t-butyl 2-acetyl-2-chloro-4-oxo-4-phenylbutanoate
  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：

  乙酰乙酸叔丁酯 、 2-溴苯乙酮 在 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 以70%的产率得到tert-butyl 2-acetyl-4-oxo-4-phenylbutyrate
  参考文献：
  名称：

  通过铜催化的 Friedel-Crafts 烷基化反应对映选择性合成氮-氮联芳基阻转异构体

  摘要：

  含有基序的氮-氮键在天然产物和生物活性化合物中无处不在。然而，由围绕 N-N 键的受限旋转引起的阻转异构在很大程度上被忽视了。在这里，我们描述了一种通过 Cu-双恶唑啉催化的 Friedel-Crafts 烷基化反应对 N-N 联芳基阻转异构体进行首次对映选择性合成的方法。通过去对称化和动力学拆分，以高产率高效制备了多种轴向手性 N-N 双氮杂杂环化合物，并具有优异的对映选择性。加热实验表明轴向手性双氮杂杂环产物具有高旋转势垒。

  DOI：

  10.1021/jacs.1c07741

文献信息

• Synthesis of C8-Aminated Pyrrolo-Phenanthridines or -Indoles via Series C(sp² or sp³)–H Activation and Fluorescence Study
  作者：Bo-Sheng Zhang、Wan-Yuan Jia、Xue-Ya Gou、Ying-Hui Yang、Fan Wang、Yi-Ming Wang、Xi-Cun Wang、Zheng-Jun Quan

  DOI：10.1021/acs.orglett.2c00318

  日期：2022.3.25

  This report developed a method for the synthesis of C8-aminated pyrrolo-phenanthridines or -indoles by series ortho C(sp2)–H amination/ipso C(sp2)–H or C(sp3)–H arylation. N-benzoyloxyamines, as electrophilic amination reagents, did not undergo an electrophilic substitution reaction with the pyrrole side, but they did undergo a site-selective C–H amination reaction with the benzene side via Pd/NBE catalysis

  本报告开发了一种通过系列邻C(sp 2 )-H 胺化/同样C(sp 2 )-H 或 C(sp 3 )-H 芳基化合成 C8-胺化吡咯并菲啶或 -吲哚的方法。N-苯甲酰氧基胺作为亲电胺化试剂，不与吡咯侧发生亲电取代反应，但通过 Pd/NBE 催化与苯侧发生位点选择性 C-H 胺化反应。C8-胺化的吡咯并菲啶在溶液和固态都具有强荧光。X射线单晶衍射表明氨基和邻苯环的空间位阻可能抑制聚集引起的猝灭(ACQ)。
• Atroposelective Synthesis of 1,1′‐Bipyrroles Bearing a Chiral N−N Axis: Chiral Phosphoric Acid Catalysis with Lewis Acid Induced Enantiodivergence
  作者：Yaru Gao、Luo‐Yu Wang、Tao Zhang、Bin‐Miao Yang、Yu Zhao

  DOI：10.1002/anie.202200371

  日期：2022.4.11

  A highly efficient atroposelective synthesis of axially chiral 1,1′-bipyrroles bearing an N−N linkage from simple hydrazine and 1,4-diones is presented. Further product derivatizations led to axially chiral bifunctional compounds with high potential in asymmetric catalysis. For this chiral phosphoric acid (CPA)-catalyzed double Paal–Knorr reaction, an intriguing Fe(OTf)3-induced enantiodivergence was

  提出了由简单的肼和 1,4-二酮高效选择性合成带有 N-N 键的轴向手性 1,1'-联吡咯。进一步的产物衍生导致了在不对称催化中具有高潜力的轴向手性双功能化合物。对于这种手性磷酸 (CPA) 催化的双 Paal-Knorr 反应，还观察到了有趣的 Fe(OTf) 3诱导的对映发散。
• Synthesis of Tri- and Tetrasubstituted Furans Catalyzed by Trifluoroacetic Acid
  作者：Frédéric Stauffer、Reinhard Neier

  DOI：10.1021/ol0063205

  日期：2000.11.1

  [GRAPHICS]Substituted 2-hydroxy-3-acetylfurans are synthesized by alkylation of tert-butyl acetoacetate with an alpha -haloketone followed by treatment of the obtained intermediate with trifluoroacetic acid (TFA). A second alkylation of the intermediate followed by treatment with trifluoroacetic acid provides access to disubstituted 2-methylfurans.
• Enantioselective Synthesis of Nitrogen–Nitrogen Biaryl Atropisomers via Copper-Catalyzed Friedel–Crafts Alkylation Reaction
  作者：Xiao-Mei Wang、Peng Zhang、Qi Xu、Chang-Qiu Guo、De-Bing Zhang、Chuan-Jun Lu、Ren-Rong Liu

  DOI：10.1021/jacs.1c07741

  日期：2021.9.22

  bioactive compounds. However, the atropisomerism arising from a restricted rotation around an N–N bond is largely overlooked. Here, we describe a method to access the first enantioselective synthesis of N–N biaryl atropisomers via a Cu-bisoxazoline-catalyzed Friedel–Crafts alkylation reaction. A wide range of axially chiral N–N bisazaheterocycle compounds were efficiently prepared in high yields with

  含有基序的氮-氮键在天然产物和生物活性化合物中无处不在。然而，由围绕 N-N 键的受限旋转引起的阻转异构在很大程度上被忽视了。在这里，我们描述了一种通过 Cu-双恶唑啉催化的 Friedel-Crafts 烷基化反应对 N-N 联芳基阻转异构体进行首次对映选择性合成的方法。通过去对称化和动力学拆分，以高产率高效制备了多种轴向手性 N-N 双氮杂杂环化合物，并具有优异的对映选择性。加热实验表明轴向手性双氮杂杂环产物具有高旋转势垒。
• 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
  作者：Kazutaka Shibatomi、Yoshinori Soga、Akira Narayama、Ikuhide Fujisawa、Seiji Iwasa

  DOI：10.1021/ja304806j

  日期：2012.6.20

  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.