4-methylbenzyl 2-bromo-2,2-difluoroacetate

• 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: 4-methylbenzyl 2-bromo-2,2-difluoroacetate
• 英文别名: 4-methylbenzyl bromodifluoroacetate；(4-Methylphenyl)methyl 2-bromo-2,2-difluoroacetate
• 化学式: C₁₀H₉BrF₂O₂
• 分子量: 279.081
• InChiKey: UKBLMCXWIVLLNN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  4-methylbenzyl 2-bromo-2,2-difluoroacetate 在 potassium fluoride 、 copper(l) iodide 、 二氟溴乙酸甲酯 、 potassium iodide 作用下， 以 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 24.0h， 以74%的产率得到1-甲基-4-(2,2,2-三氟乙基)苯
  参考文献：
  名称：

  Copper-Catalyzed Synthesis of Trifluoroethylarenes from Benzylic Bromodifluoroacetates

  摘要：

  Trifluoroethylarenes are found in a variety of biologically active molecules, and strategies for accessing this substructure are important for developing therapeutic candidates and biological probes. Trifluoroethylarenes can be directly accessed via nucleophilic trifluoromethylation of benzylic electrophiles; however, current catalytic methods do not effectively transform electron-deficient substrates and heterocycles. To address this gap, we report a Cu-catalyzed decarboxylative trifluoromethylation of benzylic bromodifluoroacetates. To account for the tolerance of sensitive functional groups, we propose an inner-sphere mechanism of decarboxylation.

  DOI：

  10.1021/acs.joc.5b01343
• 作为产物：
  描述：

  (4-甲基苯基)甲醇 、 二氟溴乙酰氟 在 吡啶 作用下， 反应 0.17h， 以94%的产率得到4-methylbenzyl 2-bromo-2,2-difluoroacetate
  参考文献：
  名称：

  Novel synthesis of 2,2,2-trifluoroethyl compounds from homoallylic alcohols: a copper(I) iodide-initiated trifluoromethyl–dehydroxylation process

  摘要：

  Benzyl, prop-2-ynyl and allyl chlorodifluoroacetates 3a, bromodifluoroacetates 3b or fluorosulfonyl-difluoroacetates 3c, when decomposed in the presence of 1 equivalent of copper(I) iodide at an appropriate temperature in dimethylformamide, gave the corresponding trifluoromethyl derivatives in good to excellent yields. The products can also be obtained directly by ester exchange of XCF2CO2Et (X = FSO2, Cl, Br) 6 and the corresponding alcohols in the presence of KF and Cul. A trifluoromethylation-dehydroxylation mechanism, initiated by Cul, is proposed.

  DOI：

  10.1039/p19940000725

文献信息

• 10.1002/ejoc.202400447
  作者：Li, Qian、Zhao, Shi-Na、Li, Ganpeng、He, Yonghui、Zhao, Xiao-Jing

  DOI：10.1002/ejoc.202400447

  日期：——

  Here, we have successfully achieved the addition of difluoroacetate radicals to 2‐aryl‐3H‐indol‐3‐ones, enabling various difluoroalkylations of C2‐tetrasubstituted 2‐aryl indolin‐3‐ones in a highly efficient and economical manner. It is worth mentioning that these difluoroalkylation compounds can be easily transformed into various derivatives under mild reaction conditions. Control experiments suggest the involvement of ethyl difluoroacetate radical species in the reaction.
• Novel synthesis of 2,2,2-trifluoroethyl compounds from homoallylic alcohols: a copper(<scp>I</scp>) iodide-initiated trifluoromethyl–dehydroxylation process
  作者：Jian-Xing Duan、Qing-Yun Chen

  DOI：10.1039/p19940000725

  日期：——

  Benzyl, prop-2-ynyl and allyl chlorodifluoroacetates 3a, bromodifluoroacetates 3b or fluorosulfonyl-difluoroacetates 3c, when decomposed in the presence of 1 equivalent of copper(I) iodide at an appropriate temperature in dimethylformamide, gave the corresponding trifluoromethyl derivatives in good to excellent yields. The products can also be obtained directly by ester exchange of XCF2CO2Et (X = FSO2, Cl, Br) 6 and the corresponding alcohols in the presence of KF and Cul. A trifluoromethylation-dehydroxylation mechanism, initiated by Cul, is proposed.
• Copper-Catalyzed Synthesis of Trifluoroethylarenes from Benzylic Bromodifluoroacetates
  作者：Brett R. Ambler、Lingui Zhu、Ryan A. Altman

  DOI：10.1021/acs.joc.5b01343

  日期：2015.8.21

  Trifluoroethylarenes are found in a variety of biologically active molecules, and strategies for accessing this substructure are important for developing therapeutic candidates and biological probes. Trifluoroethylarenes can be directly accessed via nucleophilic trifluoromethylation of benzylic electrophiles; however, current catalytic methods do not effectively transform electron-deficient substrates and heterocycles. To address this gap, we report a Cu-catalyzed decarboxylative trifluoromethylation of benzylic bromodifluoroacetates. To account for the tolerance of sensitive functional groups, we propose an inner-sphere mechanism of decarboxylation.