4-methylphenyl 2-((2S,3R,4S,5R,6R)-tetrahydro-4-hydroxy-3,5-dimethyl-6-((E)-1-(2-methyloxazol-4-yl)prop-1-en-2-yl)-2H-pyran-2-yl)acetate | 1403986-90-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯硫酚酯
• 英文名称: 4-methylphenyl 2-((2S,3R,4S,5R,6R)-tetrahydro-4-hydroxy-3,5-dimethyl-6-((E)-1-(2-methyloxazol-4-yl)prop-1-en-2-yl)-2H-pyran-2-yl)acetate
• CAS: 1403986-90-2
• 化学式: C₂₃H₂₉NO₄S
• 分子量: 415.554
• InChiKey: CYVVHVNCYQGJBR-GVHWAKQNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.8
• 重原子数：
  29.0
• 可旋转键数：
  5.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  72.56
• 氢给体数：
  1.0
• 氢受体数：
  6.0

反应信息

• 作为产物：
  描述：

  (2E,4S,5S,6R,7R,8E)-S-p-tolyl 7-((dimethyl)(1,1-dimethylethyl)silyloxy)-5-hydroxy-4,6,8-trimethyl-9-(2-methyloxazol-4-yl)nona-2,8-dienethioate 在 四丁基氟化铵 、 溶剂黄146 作用下， 以 四氢呋喃 为溶剂， 反应 1.0h， 以35%的产率得到4-methylphenyl 2-((2S,3R,4S,5R,6R)-tetrahydro-4-hydroxy-3,5-dimethyl-6-((E)-1-(2-methyloxazol-4-yl)prop-1-en-2-yl)-2H-pyran-2-yl)acetate
  参考文献：
  名称：

  Synthesis of the C20–C32 Tetrahydropyran Core of the Phorboxazoles and the C22 Epimer via a Stereodivergent Michael Reaction

  摘要：

  A stereoselective synthesis of the C20-C32 tetrahydropyran core of the phorboxazoles has been achieved in only seven steps and in a 31% overall yield. The C22 epimer was also synthesized. The key step was a silyl ether deprotection/oxy-Michael cyclization. When this step was conducted under Bronsted acid conditions, the C20-C32 core was formed with the desired 2,6-cis-stereochemistry. However, when the silyl ether deprotection/oxy-Michael cyclization was conducted under fluoride conditions buffered with acetic acid, the C22 epimer of the core was the sole product.

  DOI：

  10.1021/ol3026523