4,4-Dimethyl-1-tris(trimethylsilyl)silyl-pentan-2-one | 177341-78-5

• 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: 4,4-Dimethyl-1-tris(trimethylsilyl)silyl-pentan-2-one
• 英文别名: 4,4-Dimethyl-1-tris(trimethylsilyl)silylpentan-2-one
• CAS: 177341-78-5
• 化学式: C₁₆H₄₀OSi₄
• 分子量: 360.835
• InChiKey: GZSJGXPIWCDWPU-UHFFFAOYSA-N

物化性质

• 沸点：
  335.2±44.0 °C(Predicted)
• 密度：
  0.833±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.69
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.94
• 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：

  4,4-Dimethyl-1-tris(trimethylsilyl)silyl-pentan-2-one 在 四丁基氟化铵 作用下， 以 四氢呋喃 为溶剂， 反应 1.0h， 以92%的产率得到4,4-二甲基-2-戊酮
  参考文献：
  名称：

  Radical addition to carbenoids. Chain reactions of α-diazo carbonyl compounds with triorganotin hydrides, tris(trimethylsilyl)silane and allyltributylstannane

  摘要：

  alpha-Diazo ketones RC(O)CH=N-2 react with tributyltin hydride at 60 degrees C in benzene to give the corresponding alpha-stannyl ketones RC(O)CH(2)SnBu(3), which exist in equilibrium with the stannyl enol ether tautomers R(Bu(3)SnO)C=CH2. The reactions are initiated by di-tert-butyl hyponitrite and follow a free-radical chain mechanism, Triphenyltin hydride and tris(trimethylsilyl)silane [(TMS)(3)SiH] react similarly, the latter to yield the alpha-silyl ketone RC(O)CH2Si(TMS)(3) which does not isomerise to the more stable silyl enol ether R[(TMS)(3)SiO]C=CH2 under the reaction conditions. This result indicates that TMS(3)Si reacts at the alpha-carbon atom of the alpha-diazo ketone to give R(CO)CHSiTMS(3), probably via an initial diazenyl radical adduct; triorganotin radicals are assumed to react in the same way, When the group R in the alpha-diazo ketone is but-3-enyl, the intermediate alpha-metalloalkyl radical undergoes 5-exo-cyclisation. Aliyltributylstannane reacts with a-diazo ketones and with ethyl alpha-diazoacetate in refluxing benzene, in the presence of 2,2'-azo(2-methylpropionitrile) as initiator, to give butenyl ketones RC(O)CH2CH2CH=CH2 and ethyl pent-4-enoate, respectively, after a hydrolytic work-up.

  DOI：

  10.1039/p19960000769
• 作为产物：
  描述：

  3,3-二甲基丁酰氯 在 反式-二叔丁基连二次硝酸酯 作用下， 以 乙醚 、 苯 为溶剂， 反应 2.0h， 生成 4,4-Dimethyl-1-tris(trimethylsilyl)silyl-pentan-2-one
  参考文献：
  名称：

  Radical addition to carbenoids. Chain reactions of α-diazo carbonyl compounds with triorganotin hydrides, tris(trimethylsilyl)silane and allyltributylstannane

  摘要：

  alpha-Diazo ketones RC(O)CH=N-2 react with tributyltin hydride at 60 degrees C in benzene to give the corresponding alpha-stannyl ketones RC(O)CH(2)SnBu(3), which exist in equilibrium with the stannyl enol ether tautomers R(Bu(3)SnO)C=CH2. The reactions are initiated by di-tert-butyl hyponitrite and follow a free-radical chain mechanism, Triphenyltin hydride and tris(trimethylsilyl)silane [(TMS)(3)SiH] react similarly, the latter to yield the alpha-silyl ketone RC(O)CH2Si(TMS)(3) which does not isomerise to the more stable silyl enol ether R[(TMS)(3)SiO]C=CH2 under the reaction conditions. This result indicates that TMS(3)Si reacts at the alpha-carbon atom of the alpha-diazo ketone to give R(CO)CHSiTMS(3), probably via an initial diazenyl radical adduct; triorganotin radicals are assumed to react in the same way, When the group R in the alpha-diazo ketone is but-3-enyl, the intermediate alpha-metalloalkyl radical undergoes 5-exo-cyclisation. Aliyltributylstannane reacts with a-diazo ketones and with ethyl alpha-diazoacetate in refluxing benzene, in the presence of 2,2'-azo(2-methylpropionitrile) as initiator, to give butenyl ketones RC(O)CH2CH2CH=CH2 and ethyl pent-4-enoate, respectively, after a hydrolytic work-up.

  DOI：

  10.1039/p19960000769

文献信息

• Radical addition to carbenoids. Chain reactions of α-diazo carbonyl compounds with triorganotin hydrides, tris(trimethylsilyl)silane and allyltributylstannane
  作者：Hai-Shan Dang、Brian P. Roberts

  DOI：10.1039/p19960000769

  日期：——

  alpha-Diazo ketones RC(O)CH=N-2 react with tributyltin hydride at 60 degrees C in benzene to give the corresponding alpha-stannyl ketones RC(O)CH(2)SnBu(3), which exist in equilibrium with the stannyl enol ether tautomers R(Bu(3)SnO)C=CH2. The reactions are initiated by di-tert-butyl hyponitrite and follow a free-radical chain mechanism, Triphenyltin hydride and tris(trimethylsilyl)silane [(TMS)(3)SiH] react similarly, the latter to yield the alpha-silyl ketone RC(O)CH2Si(TMS)(3) which does not isomerise to the more stable silyl enol ether R[(TMS)(3)SiO]C=CH2 under the reaction conditions. This result indicates that TMS(3)Si reacts at the alpha-carbon atom of the alpha-diazo ketone to give R(CO)CHSiTMS(3), probably via an initial diazenyl radical adduct; triorganotin radicals are assumed to react in the same way, When the group R in the alpha-diazo ketone is but-3-enyl, the intermediate alpha-metalloalkyl radical undergoes 5-exo-cyclisation. Aliyltributylstannane reacts with a-diazo ketones and with ethyl alpha-diazoacetate in refluxing benzene, in the presence of 2,2'-azo(2-methylpropionitrile) as initiator, to give butenyl ketones RC(O)CH2CH2CH=CH2 and ethyl pent-4-enoate, respectively, after a hydrolytic work-up.