tert-butyl 4-(3-nitrophenoxy)but-2-enylcarbamate | 1267551-61-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: tert-butyl 4-(3-nitrophenoxy)but-2-enylcarbamate
• CAS: 1267551-61-0
• 化学式: C₁₅H₂₀N₂O₅
• 分子量: 308.334
• InChiKey: PABHZOMHDFNABH-SNAWJCMRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.05
• 重原子数：
  22.0
• 可旋转键数：
  6.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  90.7
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  tert-butyl 4-(3-nitrophenoxy)but-2-enylcarbamate 在 甲醇 、 (2S,3S)-(6-(4-tert-butyl-2,6-dimethylphenyl)-2,3-diphenyl-2,3,5,6-tetrahydroimidazo[1,2-c]quinazolin-5-yl)copper(I) chloride 、 双氧水 、 sodium hydroxide 、 sodium t-butanolate 作用下， 以 乙醚 、 水 、 乙酸乙酯 为溶剂， 反应 14.0h， 生成 (2-hydroxybut-3-en-1-yl)carbamic acid tert-butyl ester
  参考文献：
  名称：

  Stereoconvergent Synthesis of Chiral Allylboronates from an E/Z Mixture of Allylic Aryl Ethers Using a 6-NHC−Cu(I) Catalyst

  摘要：

  We present a 6-NHC-Cu(I) complex that provides alpha-substituted allylboronates using allylic aryl ether substrates. The method was discovered by comparison of the chemoselectivities exhibited by complexes 1a, 1b, 2, and 3. We observed that 1a preferentially reacts with electron-rich alkenes over electron-deficient alkenes. Development of an asymmetric method revealed that 1b reacts with both the E and Z isomers to provide the same absolute configuration without showing E-Z isomerization. This stereoconvergent reaction occurs with high yields (av 86%), high S(N)2` selectivity (> 99:1), and high ee (av 94%) and exhibits wide functional-group tolerance using pure E or Z isomer or E/Z alkene mixtures. The stereoconvergent feature enables the use of many different olefination strategies for substrate production, including cross-metathesis. Chiral allylboronates could be purified by silica gel chromatography and stored in the freezer without decomposition.

  DOI：

  10.1021/ja1112518
• 作为产物：
  描述：

  1-(4-Bromobut-2-enoxy)-3-nitrobenzene 在 一水合肼 作用下， 以 甲醇 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 4.0h， 生成 tert-butyl 4-(3-nitrophenoxy)but-2-enylcarbamate
  参考文献：
  名称：

  Stereoconvergent Synthesis of Chiral Allylboronates from an E/Z Mixture of Allylic Aryl Ethers Using a 6-NHC−Cu(I) Catalyst

  摘要：

  We present a 6-NHC-Cu(I) complex that provides alpha-substituted allylboronates using allylic aryl ether substrates. The method was discovered by comparison of the chemoselectivities exhibited by complexes 1a, 1b, 2, and 3. We observed that 1a preferentially reacts with electron-rich alkenes over electron-deficient alkenes. Development of an asymmetric method revealed that 1b reacts with both the E and Z isomers to provide the same absolute configuration without showing E-Z isomerization. This stereoconvergent reaction occurs with high yields (av 86%), high S(N)2` selectivity (> 99:1), and high ee (av 94%) and exhibits wide functional-group tolerance using pure E or Z isomer or E/Z alkene mixtures. The stereoconvergent feature enables the use of many different olefination strategies for substrate production, including cross-metathesis. Chiral allylboronates could be purified by silica gel chromatography and stored in the freezer without decomposition.

  DOI：

  10.1021/ja1112518