(+)-(4aR,8aS)-4a,5,8,8a-tetrahydro-2-isopropyl-3-methoxy-4a-methylnaphthalene-1,4-dione | 53430-08-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (+)-(4aR,8aS)-4a,5,8,8a-tetrahydro-2-isopropyl-3-methoxy-4a-methylnaphthalene-1,4-dione
• 英文别名: (4aR,8aS)-2-methoxy-8a-methyl-3-propan-2-yl-5,8-dihydro-4aH-naphthalene-1,4-dione
• CAS: 53430-08-3
• 化学式: C₁₅H₂₀O₃
• 分子量: 248.322
• InChiKey: CDEOXTYKCNEVJO-BONVTDFDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  18
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  1,3-丁二烯 、 2-isopropyl-3-methoxy-5-methyl-1,4-benzoquinone 在 chiral oxazaborolidinium*Tf₂N^(1-) derivative 作用下， 以 甲苯 为溶剂， 以99%的产率得到(+)-(4aR,8aS)-4a,5,8,8a-tetrahydro-2-isopropyl-3-methoxy-4a-methylnaphthalene-1,4-dione
  参考文献：
  名称：

  Application of Chiral Cationic Catalysts to Several Classical Syntheses of Racemic Natural Products Transforms Them into Highly Enantioselective Pathways

  摘要：

  This paper describes the application of chiral oxazaborolidinium cations of type 2 to various enantioselective Diels-Alder reactions that have served as early key steps for the syntheses of complex natural products. In the original syntheses these Diels-Alder reactions produced racemic adducts and led to racemic target molecules unless a separation of enantiomers by classical resolution was employed. By use of chiral catalysts of type 2, chiral products were obtained directly from Diels-Alder reactions of achiral components in excellent yield and enantioselectivity and with the mechanistically predicted absolute configuration. As a result, a number of classical syntheses could be converted to enantioselective versions, including (1) cortisone/cortisol (Merck/Sarett), (2) dendrobine (Kende), (3) vitamin B-12 (Eschenmoser), (4) myrocin C (Chu-Moyer/Danishefsky), (5) coriolin and hirsutene (Mehta), (6) dendrobatid 251F (Aube), (7) silphinene (Ito), and (8) nicandrenone core (Stoltz/Corey).

  DOI：

  10.1021/ja046154m

文献信息

• Application of Chiral Cationic Catalysts to Several Classical Syntheses of Racemic Natural Products Transforms Them into Highly Enantioselective Pathways
  作者：Qi-Ying Hu、Gang Zhou、E. J. Corey

  DOI：10.1021/ja046154m

  日期：2004.10.1

  This paper describes the application of chiral oxazaborolidinium cations of type 2 to various enantioselective Diels-Alder reactions that have served as early key steps for the syntheses of complex natural products. In the original syntheses these Diels-Alder reactions produced racemic adducts and led to racemic target molecules unless a separation of enantiomers by classical resolution was employed. By use of chiral catalysts of type 2, chiral products were obtained directly from Diels-Alder reactions of achiral components in excellent yield and enantioselectivity and with the mechanistically predicted absolute configuration. As a result, a number of classical syntheses could be converted to enantioselective versions, including (1) cortisone/cortisol (Merck/Sarett), (2) dendrobine (Kende), (3) vitamin B-12 (Eschenmoser), (4) myrocin C (Chu-Moyer/Danishefsky), (5) coriolin and hirsutene (Mehta), (6) dendrobatid 251F (Aube), (7) silphinene (Ito), and (8) nicandrenone core (Stoltz/Corey).