methyl grindelate | 1438-58-0

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: methyl grindelate
• 英文别名: Grindelic acid methyl ester；methyl 2-[(2'S,4aS,8R,8aS)-2',4,4,7,8a-pentamethylspiro[2,3,4a,5-tetrahydro-1H-naphthalene-8,5'-oxolane]-2'-yl]acetate
• CAS: 1438-58-0
• 化学式: C₂₁H₃₄O₃
• 分子量: 334.499
• InChiKey: TWPKVIVCLJTFPY-LRGNLBRXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  24
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  methyl grindelate 在 氢氧化钾 作用下， 以 甲醇 、 水 为溶剂， 反应 48.0h， 生成 (2R,5S)-4,4'aalpha,5,5',6',7',8',8'a-八氢-2',5,5',5',8'abeta-五甲基螺[呋喃-2(3H),1'(4'H)-萘]-5-乙酸
  参考文献：
  名称：

  Stereocontrolled Synthesis of ent-Grindelic Acid. A Useful Example of Diastereofacial Guidance in an Oxonium Ion-Initiated Pinacolic Ring Expansion

  摘要：

  An enantioselective synthesis of (+)-grindelic acid is described, confirming that the dextrorotatory enantiomer is antipodal to the natural diterpenoid. The optically pure bicyclic ketone 5 representing the AB ring system is constructed from the levorotatory Wieland-Miescher ketone and must therefore possess the absolute configuration shown. Coupling of 5 with the 5-lithio derivative of optically active 2,3-dihydrofuran 3 derived from (R)-(-)-linalool was effected for the purpose of realizing acid-catalyzed rearrangement with generation of the appropriate spirocyclic framework. This key step is highly stereocontrolled, leading predominantly to 7. Once the advanced intermediate 15 is available in this fashion, its subsequent exposure to oxidation and dehydration steps led to the target molecule. The synthesis demonstrates unequivocally that natural (-)-grindelic acid is a true labdane diterpenoid.

  DOI：

  10.1021/jo960547p
• 作为产物：
  描述：

  重氮甲烷 、 (2R,5S)-4,4'aalpha,5,5',6',7',8',8'a-八氢-2',5,5',5',8'abeta-五甲基螺[呋喃-2(3H),1'(4'H)-萘]-5-乙酸 以 乙醚 为溶剂， 以94%的产率得到methyl grindelate
  参考文献：
  名称：

  Derivatives of grindelic acid: From a non-active natural diterpene to synthetic antitumor derivatives

  摘要：

  Using several reactions that include homologations and asymmetric epoxidations as well as Ugi and Huisgen couplings, we generated a small focused library of new derivatives from the labdane-type diterpene grindelic acid. These compounds were evaluated as cytotoxic agents against a panel of five human solid tumor cell lines (HBL-100, HeLa, SW1573, T-47D, and WiDr). The presence of the diamide functionalizations enhanced the cytotoxic effect. N-Benzyl-N-(1-(benzylamino)-2-methyl-1-oxopropan-2-yl)grindelicamide, proved to be the most active product in all cell lines tested, with values of 0.95 (+/- 0.38) mu M against HBL-100 cells. (C) 2013 Elsevier Masson SAS. All rights reserved.

  DOI：

  10.1016/j.ejmech.2013.06.013

文献信息

• Gonzalez-Sierra, Manuel; Olivieri, Alejandro C.; Colombo, Maria I., Journal of the Chemical Society. Perkin transactions I, 1989, p. 1393 - 1399
  作者：Gonzalez-Sierra, Manuel、Olivieri, Alejandro C.、Colombo, Maria I.、Ruveda, Edmundo A.

  DOI：——

  日期：——
• GONZALEZ-SIERRA, MANUEL;OLIVIERI, ALEJANDRO C.;COLOMBO, MARIA I.;RUVEDA, +, J. CHEM. SOC. PERKIN TRANS. PT 1,(1989) N, C. 1393-1399
  作者：GONZALEZ-SIERRA, MANUEL、OLIVIERI, ALEJANDRO C.、COLOMBO, MARIA I.、RUVEDA, +

  DOI：——

  日期：——
• Derivatives of grindelic acid: From a non-active natural diterpene to synthetic antitumor derivatives
  作者：Guillermo F. Reta、Alejandra I. Chiaramello、Celina García、Leticia G. León、Víctor S. Martín、José M. Padrón、Carlos E. Tonn、Osvaldo J. Donadel

  DOI：10.1016/j.ejmech.2013.06.013

  日期：2013.9

  Using several reactions that include homologations and asymmetric epoxidations as well as Ugi and Huisgen couplings, we generated a small focused library of new derivatives from the labdane-type diterpene grindelic acid. These compounds were evaluated as cytotoxic agents against a panel of five human solid tumor cell lines (HBL-100, HeLa, SW1573, T-47D, and WiDr). The presence of the diamide functionalizations enhanced the cytotoxic effect. N-Benzyl-N-(1-(benzylamino)-2-methyl-1-oxopropan-2-yl)grindelicamide, proved to be the most active product in all cell lines tested, with values of 0.95 (+/- 0.38) mu M against HBL-100 cells. (C) 2013 Elsevier Masson SAS. All rights reserved.
• Stereocontrolled Synthesis of <i>ent</i>-Grindelic Acid. A Useful Example of Diastereofacial Guidance in an Oxonium Ion-Initiated Pinacolic Ring Expansion
  作者：Leo A. Paquette、Hui-Ling Wang

  DOI：10.1021/jo960547p

  日期：1996.1.1

  An enantioselective synthesis of (+)-grindelic acid is described, confirming that the dextrorotatory enantiomer is antipodal to the natural diterpenoid. The optically pure bicyclic ketone 5 representing the AB ring system is constructed from the levorotatory Wieland-Miescher ketone and must therefore possess the absolute configuration shown. Coupling of 5 with the 5-lithio derivative of optically active 2,3-dihydrofuran 3 derived from (R)-(-)-linalool was effected for the purpose of realizing acid-catalyzed rearrangement with generation of the appropriate spirocyclic framework. This key step is highly stereocontrolled, leading predominantly to 7. Once the advanced intermediate 15 is available in this fashion, its subsequent exposure to oxidation and dehydration steps led to the target molecule. The synthesis demonstrates unequivocally that natural (-)-grindelic acid is a true labdane diterpenoid.