N-Phenyl-2,2-difluoro-4,4-dimethyl-3-oxopentanamide

• 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: N-Phenyl-2,2-difluoro-4,4-dimethyl-3-oxopentanamide
• 英文别名: 2,2-difluoro-4,4-dimethyl-3-oxo-N-phenylpentanamide
• 化学式: C₁₃H₁₅F₂NO₂
• 分子量: 255.264
• InChiKey: MHGIHWUNFYSNJL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  18
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  46.2
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  4,4-二甲基-3-氧代-N-苯基戊酰胺 在 N-氟-o-苯二磺酰亚胺 作用下， 以 二氯甲烷 、 水 为溶剂， 反应 4.0h， 以79%的产率得到N-Phenyl-2-fluoro-4,4-dimethyl-3-oxopentanamide
  参考文献：
  名称：

  Selective, Electrophilic Fluorinations Using N-Fluoro-o-benzenedisulfonimide

  摘要：

  The synthesis of N-fluoro-o-benzenedisulfonimide (NFOBS, 2) and its use as an ''electrophilic'' fluorinating reagent with nucleophilic substrates is described and compared with that of N-fluorobenzenesulfonimide (NFSi, 3). NFOBS (2) is prepared in three steps in 81% overall yield from commercially available o-benzenedisulfonic acid (4) and involves treatment of o-benzenedisulfonimide (6) with dilute fluorine (10% F-2/N-2). Reaction of 2 with metal enolates, silyl enol ethers, and 1,3-dicarbonyl compounds affords the corresponding alpha-fluoro compounds in yields up to 95%, with good control of mono- and difluorination. Fluorination of ortho-metalated aromatic compounds was achieved in modest to good yields (10-80%). While the reactivities of 2 and 3 are similar, better yields were observed with the former reagent in the fluorination of metal enolates, Grignard and lithium reagents, while 3 gave better results with the ortho-lithiated aromatic substrates. The available evidence suggests an S(N)2-type mechanism for the fluorination of nucleophilic substrates by these reagents.

  DOI：

  10.1021/jo00120a014

文献信息

• Selective, Electrophilic Fluorinations Using N-Fluoro-o-benzenedisulfonimide
  作者：Franklin A. Davis、Wei Han、Christopher K. Murphy

  DOI：10.1021/jo00120a014

  日期：1995.7

  The synthesis of N-fluoro-o-benzenedisulfonimide (NFOBS, 2) and its use as an ''electrophilic'' fluorinating reagent with nucleophilic substrates is described and compared with that of N-fluorobenzenesulfonimide (NFSi, 3). NFOBS (2) is prepared in three steps in 81% overall yield from commercially available o-benzenedisulfonic acid (4) and involves treatment of o-benzenedisulfonimide (6) with dilute fluorine (10% F-2/N-2). Reaction of 2 with metal enolates, silyl enol ethers, and 1,3-dicarbonyl compounds affords the corresponding alpha-fluoro compounds in yields up to 95%, with good control of mono- and difluorination. Fluorination of ortho-metalated aromatic compounds was achieved in modest to good yields (10-80%). While the reactivities of 2 and 3 are similar, better yields were observed with the former reagent in the fluorination of metal enolates, Grignard and lithium reagents, while 3 gave better results with the ortho-lithiated aromatic substrates. The available evidence suggests an S(N)2-type mechanism for the fluorination of nucleophilic substrates by these reagents.