[(1R,3'R,4S,5'R,6S,7S,8R,9R,10R,12S,13S,16S,18S)-3',10-dihydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-2-ene-6,2'-oxane]-16-yl] acetate | 571185-92-7

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: [(1R,3'R,4S,5'R,6S,7S,8R,9R,10R,12S,13S,16S,18S)-3',10-dihydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-2-ene-6,2'-oxane]-16-yl] acetate
• CAS: 571185-92-7
• 化学式: C₂₉H₄₄O₆
• 分子量: 488.665
• InChiKey: UVCPXGDQUOXHAI-SIFMZNANSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  35
• 可旋转键数：
  2
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.9
• 拓扑面积：
  85.2
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  [(1R,3'R,4S,5'R,6S,7S,8R,9R,10R,12S,13S,16S,18S)-3',10-dihydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-2-ene-6,2'-oxane]-16-yl] acetate 在 吡啶 、 三乙基硅烷 、 4-二甲氨基吡啶 、 三氟化硼乙醚 作用下， 以 二氯甲烷 为溶剂， 反应 44.0h， 生成 Acetic acid (2S,4aS,4bS,6R,6aR,6bR,7S,8S,9aS,10bR,12aS)-2-acetoxy-8-((1R,3R)-1-acetoxy-4-hydroxy-3-methyl-butyl)-4a,6a,7-trimethyl-2,3,4,4a,4b,5,6,6a,6b,7,8,9a,10b,11,12,12a-hexadecahydro-1H-9-oxa-pentaleno[2,1-a]phenanthren-6-yl ester
  参考文献：
  名称：

  New Oxidative Tools for the Functionalization of the Cephalostatin North 1 Hemisphere

  摘要：

  Dimethyldioxirane (DMDO) C-H oxidation of ketone 17 to hemiketal 18 (82%), bis-dehydration to vinyl ether 21 (77%), and DMDO again provides C-23 axial alcohol 23 (99%). Routine processing, Including a double-stereoselective Sharpless AD reaction (de >98%), gives alcohols 7 and 32. C-23 deoxy substrate 7 undergoes Suarez hypoiodite oxidative cyclization to (natural) beta spiroketal 34, but compound 32, bearing a C-23 silyl ether, generates unnatural spiroketal 33.

  DOI：

  10.1021/ol034551g
• 作为产物：
  描述：

  (25R)-3β-Acetoxy-14-hydroxy-5α,14β-spirostan-12-on 在 吡啶 、 sodium tetrahydroborate 、 三氟化硼乙醚 、 二甲基二环氧乙烷 、 苯硒酚 作用下， 以 甲醇 、 二氯甲烷 、 甲苯 为溶剂， 反应 180.17h， 生成 [(1R,3'R,4S,5'R,6S,7S,8R,9R,10R,12S,13S,16S,18S)-3',10-dihydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-2-ene-6,2'-oxane]-16-yl] acetate
  参考文献：
  名称：

  New Oxidative Tools for the Functionalization of the Cephalostatin North 1 Hemisphere

  摘要：

  Dimethyldioxirane (DMDO) C-H oxidation of ketone 17 to hemiketal 18 (82%), bis-dehydration to vinyl ether 21 (77%), and DMDO again provides C-23 axial alcohol 23 (99%). Routine processing, Including a double-stereoselective Sharpless AD reaction (de >98%), gives alcohols 7 and 32. C-23 deoxy substrate 7 undergoes Suarez hypoiodite oxidative cyclization to (natural) beta spiroketal 34, but compound 32, bearing a C-23 silyl ether, generates unnatural spiroketal 33.

  DOI：

  10.1021/ol034551g

文献信息

• A Convergent Total Synthesis of the Potent Cephalostatin/Ritterazine Hybrid -25-<i>epi</i> Ritterostatin G_N1_N
  作者：Ananda Kumar Kanduluru、Prabal Banerjee、John A Beutler、Philip L Fuchs

  DOI：10.1021/jo401171q

  日期：2013.9.20

  The convergent synthesis of 25-epi ritterostatin GN1N is described for the first time, starting from hecogenin acetate (HA). Stereoselective dihydroxylation employing the chiral ligand (DHQ)2PHAL was used as the key step to introduce the C25 epi-stereocenter on the north 1 segment. The title compound was obtained through a coupling reaction between the C3-keto-azide (cstat North 1) and North G.

  首次描述了25- epi ritterostatin G N 1 N的会聚合成，从醋酸hecogenin (HA) 开始。采用手性配体的立体选择性二羟基化（DHQ）2 PHAL用作引入C25的关键步骤外延在北部1段-stereocenter。通过 C3-酮-叠氮化物 (cstat North 1) 和 North G 之间的偶联反应获得标题化合物。