(+)-eremantholide A | 58030-93-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 呋喃类
• 英文名称: (+)-eremantholide A
• 英文别名: Eremantholid A；Eremantholide A；(1S,3R,7Z,9R,12S,13R,15R)-13-hydroxy-3,7,12-trimethyl-13-propan-2-yl-10,14,16-trioxatetracyclo[7.5.1.13,6.012,15]hexadeca-5,7-diene-4,11-dione
• CAS: 58030-93-6
• 化学式: C₁₉H₂₄O₆
• 分子量: 348.396
• InChiKey: LOILTCBRRAVDAF-ZMIPQNLBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  25
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.68
• 拓扑面积：
  82.1
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  (1S,3R,3aS,6R,6aR)-6-ethenyl-1-[[5-(1-hydroxypropan-2-yl)-2-methyl-3-oxofuran-2-yl]methyl]-3-methoxy-3a-methyl-3-propan-2-yl-6,6a-dihydro-1H-furo[3,4-c]furan-4-one 在 Hoveyda-Grubbs catalyst second generation 盐酸 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 三乙胺 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 32.0h， 生成 (+)-eremantholide A
  参考文献：
  名称：

  抗肿瘤倍半萜类（+）-香叶内酯A的不对称全合成和形式全合成。

  摘要：

  [结构：见文字]。报道了一种新的不对称全合成（+）-香叶内酯A，其中使用了Hoveyda-Grubbs闭环复分解（RCM）反应组装了九元氧代宁环，并使3（2H）-之间的烯醇化烷基化。呋喃酮2和O-三氟甲磺酸3用于C（9）-C（10）键结构。埃文斯（Evans）不对称羟醛反应和Sharpless不对称环氧化用于立体选择性地安装目标结构的C（6），C（7）和C（8）立体中心。

  DOI：

  10.1021/ol0700862

文献信息

• A total synthesis of (+)-eremantholide A
  作者：Ken-ichi Takao、Hiroshi Ochiai、Takahiko Hashizuka、Hirokazu Koshimura、Kin-ichi Tadano、Seiichiro Ogawa

  DOI：10.1016/0040-4039(95)00066-l

  日期：1995.2

  Stereoselective and enantiospecific total synthesis of (+)-eremantholide A (1) is described. The present total synthesis features 1) regio- and stereoselective radical carbocyclization of D-glurose-derived gamma-lactone 7, and 2) a nine-membered ring formation by the coupling reaction of bicyclic triflate 18 and known furanone 19 followed by a vinylogous aldol reaction.
• Novel Total Synthesis of (+)-Eremantholide A
  作者：Ken-ichi Takao、Hiroshi Ochiai、Ken-ichi Yoshida、Takahiko Hashizuka、Hirokazu Koshimura、Kin-ichi Tadano、Seiichiro Ogawa

  DOI：10.1021/jo00130a017

  日期：1995.12

  Stereoselective total synthesis of (+)-eremantholide A (1), a cytotoxic furanoheliangolide sesquiterpene, was accomplished in an enantiospecific fashion. The total synthesis featured the following three key synthetic strategies. (1) Intramolecular cyclization of carbon-radicals derived from xanthates 19a or 19b proceeded regio- and stereoselectively in an exclusive 5-exo-dig mode to provide bicyclic lactones 20a or 20b. Further functional group manipulations of 20a and 20b efficiently afforded a highly substituted 3,7-dioxabicyclo[3.3.0]octan-2-one derivative 34, which served as a synthetic equivalent to the A/B ring system in 1. (2) Alkylation of the enolate of 3(2H)-furanone 36 with triflate 35 was thoroughly investigated to maximize formation of the C-alkylated diastereomers, either 10R-isomer 37 or 10S-isomer 38. It was found that choice of the base, solvent, and/or additive was critical to the diastereoselectivity. Furthermore, the 10R-isomer 50 was also prepared in increased yield and improved diastereoselectivity by coupling 36 with A/B ring equivalent 49. (3) In a later stage of the total synthesis, construction of the strained 11-oxabicyclo-[6.2.1]undeca-2,10-dien-9-one system (the C/D ring) was accomplished by means of an intramolecular vinylogous aldol reaction of aldehyde 52, prepared from 10R-isomer 40, followed by base-catalyzed beta-elimination of the corresponding mesylates 54. On the other hand, by employing analogous reaction conditions, the 10S-isomer 56 was transformed into unnatural (-)-10-epi-eremantholide A (61).
• Synthetic studies directed toward the eremantholides. 2. A novel application of the Ramberg-Baecklund rearrangement to a highly stereoselective synthesis of (+)-eremantholide A
  作者：Robert K. Boeckman、Suk Kyoon Yoon、Debra K. Heckendorn

  DOI：10.1021/ja00025a049

  日期：1991.12
• Asymmetric Total Synthesis and Formal Total Synthesis of the Antitumor Sesquiterpenoid (+)-Eremantholide A
  作者：Yi Li、Karl J. Hale

  DOI：10.1021/ol0700862

  日期：2007.3.1

  [structure: see text]. A new asymmetric total synthesis of (+)-eremantholide A is reported in which a Hoveyda-Grubbs ring-closing metathesis (RCM) reaction is used to assemble the nine-membered oxonin ring, and an enolate alkylation between the 3(2H)-furanone 2 and O-triflate 3 is exploited for C(9)-C(10) bond construction. An Evans asymmetric aldol reaction and a Sharpless asymmetric epoxidation served

  [结构：见文字]。报道了一种新的不对称全合成（+）-香叶内酯A，其中使用了Hoveyda-Grubbs闭环复分解（RCM）反应组装了九元氧代宁环，并使3（2H）-之间的烯醇化烷基化。呋喃酮2和O-三氟甲磺酸3用于C（9）-C（10）键结构。埃文斯（Evans）不对称羟醛反应和Sharpless不对称环氧化用于立体选择性地安装目标结构的C（6），C（7）和C（8）立体中心。