(2R,3R,4S)-1-(tert-Butyl-dimethyl-silanyloxy)-2,4-dimethyl-oct-5-yn-3-ol | 236390-79-7

• 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: (2R,3R,4S)-1-(tert-Butyl-dimethyl-silanyloxy)-2,4-dimethyl-oct-5-yn-3-ol
• 英文别名: (2R,3R,4S)-1-[tert-butyl(dimethyl)silyl]oxy-2,4-dimethyloct-5-yn-3-ol
• CAS: 236390-79-7
• 化学式: C₁₆H₃₂O₂Si
• 分子量: 284.514
• InChiKey: HAKOWHGDRNXEOL-RRFJBIMHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.05
• 重原子数：
  19
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.88
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (2R,3R,4S)-1-(tert-Butyl-dimethyl-silanyloxy)-2,4-dimethyl-oct-5-yn-3-ol 在 Lindlar's catalyst sodium hypochlorite 、 Jacobsen's catalyst 、 camphor-10-sulfonic acid 、 氢气 作用下， 生成 (2R,3S,4R)-1-(tert-Butyl-dimethyl-silanyloxy)-4-((2S,3R)-3-ethyl-oxiranyl)-2-methyl-pentan-3-ol
  参考文献：
  名称：

  Synthesis of a syn,syn,syn,syn-Stereopentad Precursor of the Marine Sponge Polyketide Callystatin A

  摘要：

  A C13-22 syn,syn,syn,syn-stereopentad precursor of the cytotoxic polyketide callystatin A has been prepared. The synthesis involved BF3-promoted addition of the (M)-allenylstannane 28 to the alpha-methyl-beta-OTBS aldehyde 8 to afford the syn,syn adduct homopropargylic alcohol 29. Protection as the cyclic anisylidene acetal 31 and reduction of the acetylenic triple bond with Red-Al gave the (E)-allylic alcohol 32. This was subjected to Sharpless asymmetric epoxidation and subsequent treatment with an ethylcopper reagent to yield diol 34; hydrogenolysis of the derived tosylate 37 with LiBEt3H afforded 38. Acetal hydrogenolysis with DIBAl-H and oxidation yielded aldehyde 40 which was subjected to Horner-Emmons homologation to afford ester 41. This ester was converted to ester 44, an intermediate in the Kobayashi synthesis, with which it was found to be identical.

  DOI：

  10.1021/jo9902143
• 作为产物：
  描述：

  tert-butyl-[(2S)-hex-3-yn-2-yl]oxy-dimethylsilane 在 正丁基锂 、 copper(I) bromide dimethylsulfide complex 、 三氟化硼乙醚 、 四丁基氟化铵 、 三正丁基氢锡 、 三乙胺 、 二异丙胺 作用下， 以 二氯甲烷 为溶剂， 反应 1.17h， 生成 (2R,3R,4S)-1-(tert-Butyl-dimethyl-silanyloxy)-2,4-dimethyl-oct-5-yn-3-ol
  参考文献：
  名称：

  Synthesis of a syn,syn,syn,syn-Stereopentad Precursor of the Marine Sponge Polyketide Callystatin A

  摘要：

  A C13-22 syn,syn,syn,syn-stereopentad precursor of the cytotoxic polyketide callystatin A has been prepared. The synthesis involved BF3-promoted addition of the (M)-allenylstannane 28 to the alpha-methyl-beta-OTBS aldehyde 8 to afford the syn,syn adduct homopropargylic alcohol 29. Protection as the cyclic anisylidene acetal 31 and reduction of the acetylenic triple bond with Red-Al gave the (E)-allylic alcohol 32. This was subjected to Sharpless asymmetric epoxidation and subsequent treatment with an ethylcopper reagent to yield diol 34; hydrogenolysis of the derived tosylate 37 with LiBEt3H afforded 38. Acetal hydrogenolysis with DIBAl-H and oxidation yielded aldehyde 40 which was subjected to Horner-Emmons homologation to afford ester 41. This ester was converted to ester 44, an intermediate in the Kobayashi synthesis, with which it was found to be identical.

  DOI：

  10.1021/jo9902143