(2R)-6-isopropoxy-2-((1E,3E,7E)-8-((1S,2S)-2-methylcyclopropyl)octa-1,3,7-trien-1-yl)-3,6-dihydro-2H-pyran | 1533434-56-8

• 分子结构分类: 有机化合物 - 有机杂环化合物
• 英文名称: (2R)-6-isopropoxy-2-((1E,3E,7E)-8-((1S,2S)-2-methylcyclopropyl)octa-1,3,7-trien-1-yl)-3,6-dihydro-2H-pyran
• CAS: 1533434-56-8
• 化学式: C₂₀H₃₀O₂
• 分子量: 302.457
• InChiKey: LJIAPMMGYAPDKR-GKBMVWDCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.19
• 重原子数：
  22.0
• 可旋转键数：
  8.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  18.46
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  (2R)-6-isopropoxy-2-((1E,3E,7E)-8-((1S,2S)-2-methylcyclopropyl)octa-1,3,7-trien-1-yl)-3,6-dihydro-2H-pyran 在 pyridinium chlorochromate 、 calcium carbonate 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 以14.5 mg的产率得到(R)-6-((1E,3E,7E)-8-((1S,2S)-2-methylcyclopropyl)octa-1,3,7-trien-1-yl)-5,6-dihydro-2H-pyran-2-one
  参考文献：
  名称：

  Coibacins A and B: Total Synthesis and Stereochemical Revision

  摘要：

  The interface between synthetic organic chemistry and natural products was explored in order to unravel the structure of coibacin A, a metabolite isolated from the marine cyanobacterium cf. Oscillatoria sp. that exhibits selective antileishmanial activity and potent anti-inflammatory properties. Our synthetic plan focused on a convergent strategy that allows rapid access to the desired target by coupling of three key fragments involving E-selective Wittig and modified Julia olefinations. CD measurements and comparative HPLC analyses of the natural product and four synthetic stereoisomers led to determination of its absolute configuration, thus correcting the original assignment at C-5 and unambiguously establishing those at C-16 and C-18. Additionally, we synthesized coibacin B on the basis of the assignment of configuration for coibacin A.

  DOI：

  10.1021/jo402339y
• 作为产物：
  描述：

  (E)-((6-bromohex-4-en-1-yl)oxy)(tertbutyl)dimethylsilane 在 草酰氯 、 四丁基氟化铵 、 sodium hexamethyldisilazane 、 双(三甲基硅烷基)氨基钾 、 二甲基亚砜 作用下， 以 四氢呋喃 、 乙二醇二甲醚 、 二氯甲烷 、 甲苯 、 乙腈 为溶剂， 反应 32.25h， 生成 (2R)-6-isopropoxy-2-((1E,3E,7E)-8-((1S,2S)-2-methylcyclopropyl)octa-1,3,7-trien-1-yl)-3,6-dihydro-2H-pyran
  参考文献：
  名称：

  Coibacins A and B: Total Synthesis and Stereochemical Revision

  摘要：

  The interface between synthetic organic chemistry and natural products was explored in order to unravel the structure of coibacin A, a metabolite isolated from the marine cyanobacterium cf. Oscillatoria sp. that exhibits selective antileishmanial activity and potent anti-inflammatory properties. Our synthetic plan focused on a convergent strategy that allows rapid access to the desired target by coupling of three key fragments involving E-selective Wittig and modified Julia olefinations. CD measurements and comparative HPLC analyses of the natural product and four synthetic stereoisomers led to determination of its absolute configuration, thus correcting the original assignment at C-5 and unambiguously establishing those at C-16 and C-18. Additionally, we synthesized coibacin B on the basis of the assignment of configuration for coibacin A.

  DOI：

  10.1021/jo402339y