ethyl (E)-3-[(2R,5S,6S,9R)-2-tert-butyl-8-[[tert-butyl(diphenyl)silyl]oxymethyl]-9-methyl-4-oxo-1,3-dioxaspiro[4.5]dec-7-en-6-yl]-2-methylprop-2-enoate | 146983-25-7

• 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: ethyl (E)-3-[(2R,5S,6S,9R)-2-tert-butyl-8-[[tert-butyl(diphenyl)silyl]oxymethyl]-9-methyl-4-oxo-1,3-dioxaspiro[4.5]dec-7-en-6-yl]-2-methylprop-2-enoate
• CAS: 146983-25-7
• 化学式: C₃₆H₄₈O₆Si
• 分子量: 604.859
• InChiKey: KOVQEPDTCRCVAJ-UOJXTBNSSA-N

物化性质

• 沸点：
  640.8±55.0 °C(predicted)
• 密度：
  1.11±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.34
• 重原子数：
  43
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  71.1
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  ethyl (E)-3-[(2R,5S,6S,9R)-2-tert-butyl-8-[[tert-butyl(diphenyl)silyl]oxymethyl]-9-methyl-4-oxo-1,3-dioxaspiro[4.5]dec-7-en-6-yl]-2-methylprop-2-enoate 在 咪唑 、 二异丁基氢化铝 、 potassium carbonate 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 36.0h， 生成 methyl (1S,2S,5R)-4-<<(tert-butyldiphenylsilyl)oxy>methyl>-1-hydroxy-5-methyl-2-<2'-methyl-3'-<(tert-butyldimethylsilyl)oxy>-1'(E)-propen-1'-yl>3-cyclohexene-1-carboxylate
  参考文献：
  名称：

  A highly diastereo- and enantioselective synthesis of the top half of kijanolide

  摘要：

  A highly diastereo- and enantioselective synthesis of spirotetronate 4 corresponding to the top half of kijanolide is reported. This synthesis features the novel exo-selective Diels-Alder reaction of triene 6 and the chiral, nonracemic dienophiles (R)-7 and (R)-8. The reaction of 6 and (R)-7 produced a mixture of the desired exo cycloadduct 28, the unexpected exo diastereofacial isomer 29, and a minor amount of the endo cycloadduct 30. However, the Diels-Alder reaction of 6 and dienophile (R)-8 with the more sterically demanding tert-butyl substituent provided a 13-14:1 mixture of exo cycloadduct 38 and endo isomer 39; the exo diastereofacial isomer corresponding to 29 was not observed. Elaboration of 28 and 38 to spirotetronate 4 proceeded by way of the Dieckmann cyclization of alpha-acetoxy ester 5.

  DOI：

  10.1021/jo00060a035
• 作为产物：
  描述：

  3-羟基-2-亚甲基丁酸甲酯 在 咪唑 、 manganese(IV) oxide 、 N-溴代丁二酰亚胺(NBS) 、 2,3-二巯基丁二酸 、 2,6-二叔丁基-4-甲基苯酚 、 sodium acetate 、 二异丁基氢化铝 、 potassium carbonate 、 lithium hexamethyldisilazane 作用下， 以 乙醚 、 正己烷 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 181.25h， 生成 ethyl (E)-3-[(2R,5S,6S,9R)-2-tert-butyl-8-[[tert-butyl(diphenyl)silyl]oxymethyl]-9-methyl-4-oxo-1,3-dioxaspiro[4.5]dec-7-en-6-yl]-2-methylprop-2-enoate
  参考文献：
  名称：

  A highly diastereo- and enantioselective synthesis of the top half of kijanolide

  摘要：

  A highly diastereo- and enantioselective synthesis of spirotetronate 4 corresponding to the top half of kijanolide is reported. This synthesis features the novel exo-selective Diels-Alder reaction of triene 6 and the chiral, nonracemic dienophiles (R)-7 and (R)-8. The reaction of 6 and (R)-7 produced a mixture of the desired exo cycloadduct 28, the unexpected exo diastereofacial isomer 29, and a minor amount of the endo cycloadduct 30. However, the Diels-Alder reaction of 6 and dienophile (R)-8 with the more sterically demanding tert-butyl substituent provided a 13-14:1 mixture of exo cycloadduct 38 and endo isomer 39; the exo diastereofacial isomer corresponding to 29 was not observed. Elaboration of 28 and 38 to spirotetronate 4 proceeded by way of the Dieckmann cyclization of alpha-acetoxy ester 5.

  DOI：

  10.1021/jo00060a035

文献信息

• Studies on the Synthesis of Kijanolide: Synthesis of an Advanced Seco-acid Intermediate
  作者：William R. Roush、Hou Chen、Melissa L. Reilly

  DOI：10.3987/com-02-s(m)17

  日期：——

  A synthesis of an advanced seco acid intermediate (7) in a projected total synthesis of kijanolide is described. Key steps in the synthesis of 7 include the highly diastereoselective allylation reaction of 15, the Suzuki cross coupling of dienyl iodide (11) and vinylboronic acid (12), and the IMDA reaction of 9. Elaboration of the spirotetronic acid unit of 7 was accomplished by a Dieckmann cyclization

  描述了在计划的 kijanolide 总合成中合成高级 seco 酸中间体 (7)。7合成的关键步骤包括15的高度非对映选择性烯丙基化反应、二烯基碘(11)和乙烯基硼酸(12)的Suzuki交叉偶联以及9的IMDA反应。完成了7的螺环酮酸单元的研制通过来自 IMDA 环加合物的 α-乙酰氧基酯中间体的 Dieckmann 环化 (39)。
• A highly diastereo- and enantioselective synthesis of the top half of kijanolide
  作者：William R. Roush、Bradley B. Brown

  DOI：10.1021/jo00060a035

  日期：1993.4

  A highly diastereo- and enantioselective synthesis of spirotetronate 4 corresponding to the top half of kijanolide is reported. This synthesis features the novel exo-selective Diels-Alder reaction of triene 6 and the chiral, nonracemic dienophiles (R)-7 and (R)-8. The reaction of 6 and (R)-7 produced a mixture of the desired exo cycloadduct 28, the unexpected exo diastereofacial isomer 29, and a minor amount of the endo cycloadduct 30. However, the Diels-Alder reaction of 6 and dienophile (R)-8 with the more sterically demanding tert-butyl substituent provided a 13-14:1 mixture of exo cycloadduct 38 and endo isomer 39; the exo diastereofacial isomer corresponding to 29 was not observed. Elaboration of 28 and 38 to spirotetronate 4 proceeded by way of the Dieckmann cyclization of alpha-acetoxy ester 5.