t-butyl 2-fluoro-1-oxo-1,2,3,4-tetrahydronaphthalene-2-carboxylate | 1361563-55-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 萘
• 英文名称: t-butyl 2-fluoro-1-oxo-1,2,3,4-tetrahydronaphthalene-2-carboxylate
• CAS: 1361563-55-4
• 化学式: C₁₅H₁₇FO₃
• 分子量: 264.297
• InChiKey: VYBCTAYERQGAML-OAHLLOKOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.87
• 重原子数：
  19.0
• 可旋转键数：
  1.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  43.37
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为产物：
  描述：

  3,4-二氢-1(2H)-萘酮 在 N-氯代丁二酰亚胺 、 18-冠醚-6 、 C₃₅H₂₆N₂O₂ 、 copper(II) bis(trifluoromethanesulfonate) 、 sodium hydride 、 cesium fluoride 作用下， 以 乙腈 、 苯 为溶剂， 反应 24.0h， 生成 t-butyl 2-fluoro-1-oxo-1,2,3,4-tetrahydronaphthalene-2-carboxylate
  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

• Chiral bifunctional phase transfer catalysts for asymmetric fluorination of β-keto esters
  作者：Xisheng Wang、Quan Lan、Seiji Shirakawa、Keiji Maruoka

  DOI：10.1039/b920099a

  日期：——

  Chiral bifunctional phase transfer catalysts introducing bis(diarylhydroxymethyl) substituents at 3,3′-positions of the chiral binaphthyl core were successfully applied to asymmetric fluorination of cyclic β-keto esters with high enantioselectivities.

  具有二芳基羟甲基取代基的手性双功能相转移催化剂在手性二萘基核心的3,3'-位成功应用于循环β-酮酯的非对称氟化反应，显示出高的对映选择性。
• Iron(iii)–salan complexes catalysed highly enantioselective fluorination and hydroxylation of β-keto esters and N-Boc oxindoles
  作者：Xin Gu、Yan Zhang、Zhen-Jiang Xu、Chi-Ming Che

  DOI：10.1039/c4cc01631a

  日期：——

  Chiral iron(III)–salan complexes catalysed highly enantioselective α-fluorination and α-hydroxylation of β-keto esters and N-Boc oxindoles to give the corresponding products in high yields and good-to-excellent ee values under mild reaction conditions.

  手性铁(III)–salan复合物催化了β-酮酯和N-Boc氧杂环戊烯的高度对映选择性α-氟化和α-羟基化反应，在温和的反应条件下获得相应产物，产率高，对映体过量值良好至优异。
• Syntheses and Applications of (Thio)Urea-Containing Chiral Quaternary Ammonium Salt Catalysts
  作者：Johanna Novacek、Mario Waser

  DOI：10.1002/ejoc.201301594

  日期：2014.2

  bifunctional (thio)urea-containing quaternary ammonium salts based on easily obtainable chiral backbones. Among the different classes of catalysts that were successfully synthesized, those based on trans-1,2-cyclohexane diamine were found to be the most powerful for the asymmetric α-fluorination of β-keto esters. Selectivities up to 93:7 could be obtained by using only 2 mol-% of the optimized catalyst. The

  我们在此报告了我们基于易于获得的手性骨架获得一类新的系统修饰的含（硫）脲的季铵盐的努力。在成功合成的不同类别的催化剂中，发现基于反式-1,2-环己二胺的催化剂对β-酮酯的不对称α-氟化作用最强。仅使用 2 mol-% 的优化催化剂即可获得高达 93:7 的选择性。这些催化剂的双功能性质的重要性通过使用简化的单功能催化剂类似物的对照实验得到证明，该类似物仅产生几乎外消旋的产物。