(1R,2S)-2-[(1R,3aR,4S,7aR)-4-[tert-butyl(dimethyl)silyl]oxy-7a-methyl-1,2,3,3a,4,5,6,7-octahydroinden-1-yl]-1-[(1R,3S)-2,2,3-trimethylcyclopropyl]propan-1-ol | 139131-67-2

• 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: (1R,2S)-2-[(1R,3aR,4S,7aR)-4-[tert-butyl(dimethyl)silyl]oxy-7a-methyl-1,2,3,3a,4,5,6,7-octahydroinden-1-yl]-1-[(1R,3S)-2,2,3-trimethylcyclopropyl]propan-1-ol
• CAS: 139131-67-2；139238-86-1
• 化学式: C₂₅H₄₈O₂Si
• 分子量: 408.74
• InChiKey: YMMWZVMULLGRDX-BWWOESIMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.88
• 重原子数：
  28.0
• 可旋转键数：
  5.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  29.46
• 氢给体数：
  1.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  (1R,2S)-2-[(1R,3aR,4S,7aR)-4-[tert-butyl(dimethyl)silyl]oxy-7a-methyl-1,2,3,3a,4,5,6,7-octahydroinden-1-yl]-1-[(1R,3S)-2,2,3-trimethylcyclopropyl]propan-1-ol 在 水 、 对甲苯磺酸 作用下， 以 1,4-二氧六环 为溶剂， 以93%的产率得到<1R<1β(R^*,E,S^*),3aα,4β,7aβ>>-6-(Octahydro-4-<<(1,1-dimethylethyl)dimethylsilyl>oxy>-7a-methyl-1H-inden-1-yl)-2,3-dimethyl-4-hepten-2-ol
  参考文献：
  名称：

  Two new approaches to the 25-hydroxy-vitamin D2 side chain

  摘要：

  Two approaches to the 25-hydroxy-vitamin D2 side chain have been developed based on the solvolysis of cyclopropylcarbinyl precursors. The first involves addition of trimethylcyclopropyllithium reagent 4 to a suitably protected C/D system 9. This reaction leads directly to cyclopropylcarbinols 10a,b which can be solvolyzed to the vitamin D2 side chain directly. The second approach uses an intermediate C/D system with a side chain allylic alcohol. Cyclopropanation of the allylic alcohol using Et2Zn/CH3CHI2 produces the same type of cyclopropylcarbinols 10a,b but in differing isomer ratios. Model studies and stereochemical differences in the two approaches are discussed.

  DOI：

  10.1021/jo00033a021
• 作为产物：
  描述：

  2-甲基-2-丁烯 在 四甲基乙二胺 、 叔丁基锂 、 sodium hexamethyldisilazane 作用下， 以 正戊烷 为溶剂， 反应 3.5h， 生成 (1R,2S)-2-[(1R,3aR,4S,7aR)-4-[tert-butyl(dimethyl)silyl]oxy-7a-methyl-1,2,3,3a,4,5,6,7-octahydroinden-1-yl]-1-[(1R,3S)-2,2,3-trimethylcyclopropyl]propan-1-ol
  参考文献：
  名称：

  Two new approaches to the 25-hydroxy-vitamin D2 side chain

  摘要：

  Two approaches to the 25-hydroxy-vitamin D2 side chain have been developed based on the solvolysis of cyclopropylcarbinyl precursors. The first involves addition of trimethylcyclopropyllithium reagent 4 to a suitably protected C/D system 9. This reaction leads directly to cyclopropylcarbinols 10a,b which can be solvolyzed to the vitamin D2 side chain directly. The second approach uses an intermediate C/D system with a side chain allylic alcohol. Cyclopropanation of the allylic alcohol using Et2Zn/CH3CHI2 produces the same type of cyclopropylcarbinols 10a,b but in differing isomer ratios. Model studies and stereochemical differences in the two approaches are discussed.

  DOI：

  10.1021/jo00033a021