α-bromo-N-trimethylsilylmethyl-N-benzylacetamide | 143925-60-4

• 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: α-bromo-N-trimethylsilylmethyl-N-benzylacetamide
• 英文别名: Acetamide, 2-bromo-N-(phenylmethyl)-N-[(trimethylsilyl)methyl]-；N-benzyl-2-bromo-N-(trimethylsilylmethyl)acetamide
• CAS: 143925-60-4
• 化学式: C₁₃H₂₀BrNOSi
• 分子量: 314.297
• InChiKey: KJCRBSVSWUKNBO-UHFFFAOYSA-N

物化性质

• 沸点：
  368.8±37.0 °C(Predicted)
• 密度：
  1.217±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.29
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  20.3
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  α-bromo-N-trimethylsilylmethyl-N-benzylacetamide 在 9,10-二氰基蒽 叔丁基过氧化氢 、 重铬酸吡啶 、 正丁基锂 、 Celite 作用下， 以 乙腈 、 苯 为溶剂， 反应 24.5h， 生成 methyl (4aR,8aR)-2-benzyl-3,7-dioxo-1,4,8,8a-tetrahydroisoquinoline-4a-carboxylate
  参考文献：
  名称：

  Exploratory studies of .alpha.-silylamino- and .alpha.-silylamido-2,5-cyclohexadien-1-one SET photochemistry. Methodology for synthesis of functionalized hydroisoquinolines

  摘要：

  The electron-transfer (SET) photochemistry of selected alpha-silylamino and alpha-silylamido 2,5-cyclohexadienones has been explored with the intent of developing a novel and potentially efficient method for functionalized hydroisoquinoline synthesis. These substances, prepared by Birch reduction-alkylation-oxidation sequences, were found to undergo 9,10-dicyanoanthracene-SET-sensitized radical cyclization to form hydroisoquinolines in a highly regio- and stereoselective fashion and in modest to good yields. In contrast, the major direct irradiation reaction pathway followed by the alpha-silylamido-substituted systems involves type A rearrangement to bicyclic cyclohexenones or phenols. Direct irradiation of the alpha-silylamino analogs, on the other hand, brings about near-exclusive conversion to the corresponding hydroisoquinolines. The synthetic and mechanistic features of this study are described.

  DOI：

  10.1021/jo00048a046
• 作为产物：
  描述：

  溴乙酰氯 、 N-[(三甲基硅)甲基]苄胺 以 乙腈 为溶剂， 反应 2.0h， 以80%的产率得到α-bromo-N-trimethylsilylmethyl-N-benzylacetamide
  参考文献：
  名称：

  A Synthetic Strategy for the Preparation of Cyclic Peptide Mimetics Based on SET-Promoted Photocyclization Processes

  摘要：

  A novel method for the synthesis of cyclic peptide analogues has been developed. The general approach relies on the use of SET-promoted photocyclization reactions of peptides that contain N-terminal phthalimides as light absorbing electron acceptor moieties and C-terminal alpha-amidosilane or alpha-amidocarboxylate centers. Prototypical substrates are prepared by coupling preformed peptides with the acid chloride of N-phthalimidoglycine. Irradiation of these substrates results in the generation of cyclic peptide analogues in modest to good yields. The chemical efficiencies of these processes are not significantly affected by (1) the lengths of the peptide chains separating the phthalimide and alpha-amidosilane or alpha-amidocarboxylate centers and (2) the nature of the penultimate cation radical a-heterolytic fragmentation process (i.e., desilylation vs decarboxylation). An evaluation of the effects of N-alkyl substitution on the amide residues in the peptide chain showed that N-alkyl substitution does not have a major impact on the efficiencies of the photocyclization reactions but that it profoundly increases the stability of the cyclic peptide.

  DOI：

  10.1021/ja030297b

文献信息

• A Synthetic Strategy for the Preparation of Cyclic Peptide Mimetics Based on SET-Promoted Photocyclization Processes
  作者：Ung Chan Yoon、Ying Xue Jin、Sun Wha Oh、Chan Hyo Park、Jong Hoon Park、Charles F. Campana、Xiaolu Cai、Eileen N. Duesler、Patrick S. Mariano

  DOI：10.1021/ja030297b

  日期：2003.9.1

  A novel method for the synthesis of cyclic peptide analogues has been developed. The general approach relies on the use of SET-promoted photocyclization reactions of peptides that contain N-terminal phthalimides as light absorbing electron acceptor moieties and C-terminal alpha-amidosilane or alpha-amidocarboxylate centers. Prototypical substrates are prepared by coupling preformed peptides with the acid chloride of N-phthalimidoglycine. Irradiation of these substrates results in the generation of cyclic peptide analogues in modest to good yields. The chemical efficiencies of these processes are not significantly affected by (1) the lengths of the peptide chains separating the phthalimide and alpha-amidosilane or alpha-amidocarboxylate centers and (2) the nature of the penultimate cation radical a-heterolytic fragmentation process (i.e., desilylation vs decarboxylation). An evaluation of the effects of N-alkyl substitution on the amide residues in the peptide chain showed that N-alkyl substitution does not have a major impact on the efficiencies of the photocyclization reactions but that it profoundly increases the stability of the cyclic peptide.
• Exploratory studies of .alpha.-silylamino- and .alpha.-silylamido-2,5-cyclohexadien-1-one SET photochemistry. Methodology for synthesis of functionalized hydroisoquinolines
  作者：Young Shik Jung、William H. Swartz、Wei Xu、Patrick S. Mariano、Neal J. Green、Arthur G. Schultz

  DOI：10.1021/jo00048a046

  日期：1992.10

  The electron-transfer (SET) photochemistry of selected alpha-silylamino and alpha-silylamido 2,5-cyclohexadienones has been explored with the intent of developing a novel and potentially efficient method for functionalized hydroisoquinoline synthesis. These substances, prepared by Birch reduction-alkylation-oxidation sequences, were found to undergo 9,10-dicyanoanthracene-SET-sensitized radical cyclization to form hydroisoquinolines in a highly regio- and stereoselective fashion and in modest to good yields. In contrast, the major direct irradiation reaction pathway followed by the alpha-silylamido-substituted systems involves type A rearrangement to bicyclic cyclohexenones or phenols. Direct irradiation of the alpha-silylamino analogs, on the other hand, brings about near-exclusive conversion to the corresponding hydroisoquinolines. The synthetic and mechanistic features of this study are described.