4-bromomethyl-1-trimethylsilyl-7-octen-1-one | 220485-32-5

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: 4-bromomethyl-1-trimethylsilyl-7-octen-1-one
• 英文别名: 4-(Bromomethyl)-1-trimethylsilyloct-7-en-1-one
• CAS: 220485-32-5
• 化学式: C₁₂H₂₃BrOSi
• 分子量: 291.304
• InChiKey: JFKZSQXETOMORE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.19
• 重原子数：
  15
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  4-bromomethyl-1-trimethylsilyl-7-octen-1-one 在 偶氮二异丁腈 、 三正丁基氢锡 作用下， 以 苯 为溶剂， 反应 2.0h， 以23%的产率得到3-But-3-enyl-cyclopentanol
  参考文献：
  名称：

  The Study of the Kinetics of Intramolecular Radical Cyclizations of Acylsilanes via the Intramolecular Competition Method

  摘要：

  The kinetics of the radical cyclizations of acylsilanes is probed by the construction of an intramolecular competition system. In this system, known rate constants of olefin cyclizations are used as the internal clock. At-benzene reflux temperature (80 degrees C), the cyclization rate constants for 5-exo cyclizations of acylsilanes with primary radicals are on the order of 10(6) s(-1). The corresponding rate constants for 5-exo cyclizations with secondary radicals and 6-exo cyclizations with primary radicals lie on the order of 10(5) s(-1). The 6-exo cyclizations of acylsilanes with secondary radicals are slower and fall in the range of 10(4) s(-1). Substituents on the silicon of the acylsilanes affect the rates of cyclization. Large silyl groups reduce the rate, and this is more serious for the g-exo type of cyclizations. Electron-withdrawing groups increase the rates of cyclization.

  DOI：

  10.1021/jo982079k
• 作为产物：
  描述：

  2-(2-[1,3]Dithian-2-yl-ethyl)-malonic acid dimethyl ester 在 lithium aluminium tetrahydride 、 正丁基锂 、 氰化钠 、 sodium hydride 、 碳酸氢钠 、 对甲苯磺酸 、 三乙胺 、 [双(三氟乙酰氧基)碘]苯 、 lithium bromide 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 、 丙酮 、 乙腈 为溶剂， 反应 17.0h， 生成 4-bromomethyl-1-trimethylsilyl-7-octen-1-one
  参考文献：
  名称：

  The Study of the Kinetics of Intramolecular Radical Cyclizations of Acylsilanes via the Intramolecular Competition Method

  摘要：

  The kinetics of the radical cyclizations of acylsilanes is probed by the construction of an intramolecular competition system. In this system, known rate constants of olefin cyclizations are used as the internal clock. At-benzene reflux temperature (80 degrees C), the cyclization rate constants for 5-exo cyclizations of acylsilanes with primary radicals are on the order of 10(6) s(-1). The corresponding rate constants for 5-exo cyclizations with secondary radicals and 6-exo cyclizations with primary radicals lie on the order of 10(5) s(-1). The 6-exo cyclizations of acylsilanes with secondary radicals are slower and fall in the range of 10(4) s(-1). Substituents on the silicon of the acylsilanes affect the rates of cyclization. Large silyl groups reduce the rate, and this is more serious for the g-exo type of cyclizations. Electron-withdrawing groups increase the rates of cyclization.

  DOI：

  10.1021/jo982079k

文献信息

• The Study of the Kinetics of Intramolecular Radical Cyclizations of Acylsilanes via the Intramolecular Competition Method
  作者：Weir-Torn Jiaang、Hsien-Chang Lin、Kuo-Hsiang Tang、Lih-Bin Chang、Yeun-Min Tsai

  DOI：10.1021/jo982079k

  日期：1999.1.1

  The kinetics of the radical cyclizations of acylsilanes is probed by the construction of an intramolecular competition system. In this system, known rate constants of olefin cyclizations are used as the internal clock. At-benzene reflux temperature (80 degrees C), the cyclization rate constants for 5-exo cyclizations of acylsilanes with primary radicals are on the order of 10(6) s(-1). The corresponding rate constants for 5-exo cyclizations with secondary radicals and 6-exo cyclizations with primary radicals lie on the order of 10(5) s(-1). The 6-exo cyclizations of acylsilanes with secondary radicals are slower and fall in the range of 10(4) s(-1). Substituents on the silicon of the acylsilanes affect the rates of cyclization. Large silyl groups reduce the rate, and this is more serious for the g-exo type of cyclizations. Electron-withdrawing groups increase the rates of cyclization.