(1S,7aS)-tetrahydro-1-methyl-1-<2-(trimethylsilyl)-2-(Z),8-nonadienyl>-1H,3H-pyrrolo<1,2-c>oxazol-3-one | 94596-73-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑烷类
• 英文名称: (1S,7aS)-tetrahydro-1-methyl-1-<2-(trimethylsilyl)-2-(Z),8-nonadienyl>-1H,3H-pyrrolo<1,2-c>oxazol-3-one
• CAS: 94596-73-3
• 化学式: C₁₉H₃₃NO₂Si
• 分子量: 335.562
• InChiKey: XQOYKWMVHRHCMS-BQZPAYMASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.3
• 重原子数：
  23.0
• 可旋转键数：
  8.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.74
• 拓扑面积：
  29.54
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  (1S,7aS)-tetrahydro-1-methyl-1-<2-(trimethylsilyl)-2-(Z),8-nonadienyl>-1H,3H-pyrrolo<1,2-c>oxazol-3-one 在 9-borabicyclo[3.3.1]nonane dimer 作用下， 以 四氢呋喃 为溶剂， 反应 18.0h， 以47%的产率得到(1S,7aS)-tetrahydro-1-methyl-1-<8-hydroxy-2-(trimethylsilyl)-2(Z)-nonenyl>-1H,3H-pyrrolo<1,2-c>oxazol-3-one
  参考文献：
  名称：

  A new class of cardiotonic agents: structure-activity correlations for natural and synthetic analogs of the alkaloid pumiliotoxin B (8-hydroxy-8-methyl-6-alkylidene-1-azabicyclo[4.3.0]nonanes)

  摘要：

  Pumiliotoxin B (PTX-B, 6-(6',7'-dihydroxy-2',5'-dimethyl-(E)-4'-octenylidene)-8-hydroxy-8 -methyl-1- azabicyclo-[4.3.0] nonane) increases the force of contractures of spontaneously beating guinea pig atrial strips by 3- to 5-fold with half-maximal effects at about 3 microM and increases rates of atrial contractions by 2- to 3-fold with half-maximal effects at about 6 microM. The presence of an axial 7-hydroxy substituent (PTX 339A) decreases the efficacy but not the potency of PTX-B as a positive inotropic agent while having only slight effects on activity as a positive chronotropic agent. The presence of an equatorial 7-hydroxy substituent (PTX 339B) greatly decreases efficacy and potency of PTX-B as a positive chronotropic and inotropic agent. Pumiliotoxin A which lacks the side-chain 7'-hydroxy group of PTX-B causes only a 2-fold increase in force of contracture at 54 microM while having minimal effects on rate. The presence of an axial 7-hydroxy substituent (PTX 323B' and 323B", epimeric at the 6'-hydroxy) markedly enhances positive inotropic and chronotropic effects of PTX-A. Another congener, PTX 251D with a 6-(2'-methylhexylidene) side chain, and a synthetic analogue with a 6-(6'-heptenylidene) side chain are cardiac depressants. Both lack hydroxyl groups in the side chain. The presence of an omega-1 hydroxy group in the side chain of PTX 251D yields an alkaloid (267C) with weak positive inotropic effects and minimal chronotropic effects. The presence of an axial 7-hydroxy group in the indolizidine ring of PTX 251D results in a compound (PTX 267A) with very weak positive inotropic effects while retaining the negative chronotropic effects of PTX 251D. A synthetic analogue with a 6-(7'-hydroxyheptylidene) side chain is a cardiac depressant even though it contains a side-chain hydroxyl corresponding in position to the 7'-hydroxyl of the side chain of PTX-B. The positive chronotropic and inotropic effects of pumiliotoxin B are reversed only by relatively high concentrations of the calcium channel blockers nifedipine and verapamil, suggesting that pumiliotoxin B may owe its cardiotonic activities to effects on internal mobilization of calcium.

  DOI：

  10.1021/jm00382a017
• 作为产物：
  描述：

  lithium trimethylsilylacetylenide 在 六甲基磷酰三胺 作用下， 以 乙二醇二甲醚 为溶剂， 反应 1.0h， 生成 (1S,7aS)-tetrahydro-1-methyl-1-<2-(trimethylsilyl)-2-(Z),8-nonadienyl>-1H,3H-pyrrolo<1,2-c>oxazol-3-one
  参考文献：
  名称：

  A new class of cardiotonic agents: structure-activity correlations for natural and synthetic analogs of the alkaloid pumiliotoxin B (8-hydroxy-8-methyl-6-alkylidene-1-azabicyclo[4.3.0]nonanes)

  摘要：

  Pumiliotoxin B (PTX-B, 6-(6',7'-dihydroxy-2',5'-dimethyl-(E)-4'-octenylidene)-8-hydroxy-8 -methyl-1- azabicyclo-[4.3.0] nonane) increases the force of contractures of spontaneously beating guinea pig atrial strips by 3- to 5-fold with half-maximal effects at about 3 microM and increases rates of atrial contractions by 2- to 3-fold with half-maximal effects at about 6 microM. The presence of an axial 7-hydroxy substituent (PTX 339A) decreases the efficacy but not the potency of PTX-B as a positive inotropic agent while having only slight effects on activity as a positive chronotropic agent. The presence of an equatorial 7-hydroxy substituent (PTX 339B) greatly decreases efficacy and potency of PTX-B as a positive chronotropic and inotropic agent. Pumiliotoxin A which lacks the side-chain 7'-hydroxy group of PTX-B causes only a 2-fold increase in force of contracture at 54 microM while having minimal effects on rate. The presence of an axial 7-hydroxy substituent (PTX 323B' and 323B", epimeric at the 6'-hydroxy) markedly enhances positive inotropic and chronotropic effects of PTX-A. Another congener, PTX 251D with a 6-(2'-methylhexylidene) side chain, and a synthetic analogue with a 6-(6'-heptenylidene) side chain are cardiac depressants. Both lack hydroxyl groups in the side chain. The presence of an omega-1 hydroxy group in the side chain of PTX 251D yields an alkaloid (267C) with weak positive inotropic effects and minimal chronotropic effects. The presence of an axial 7-hydroxy group in the indolizidine ring of PTX 251D results in a compound (PTX 267A) with very weak positive inotropic effects while retaining the negative chronotropic effects of PTX 251D. A synthetic analogue with a 6-(7'-hydroxyheptylidene) side chain is a cardiac depressant even though it contains a side-chain hydroxyl corresponding in position to the 7'-hydroxyl of the side chain of PTX-B. The positive chronotropic and inotropic effects of pumiliotoxin B are reversed only by relatively high concentrations of the calcium channel blockers nifedipine and verapamil, suggesting that pumiliotoxin B may owe its cardiotonic activities to effects on internal mobilization of calcium.

  DOI：

  10.1021/jm00382a017