isobutyl (3S)-5-benzyloxy-3-(tert-butyldimethylsilyl)oxypentanoate | 189026-20-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: isobutyl (3S)-5-benzyloxy-3-(tert-butyldimethylsilyl)oxypentanoate
• 英文别名: 2-methylpropyl (3S)-3-[tert-butyl(dimethyl)silyl]oxy-5-phenylmethoxypentanoate
• CAS: 189026-20-8
• 化学式: C₂₂H₃₈O₄Si
• 分子量: 394.627
• InChiKey: SODMIYNORRXOJL-FQEVSTJZSA-N

物化性质

• 沸点：
  427.0±40.0 °C(Predicted)
• 密度：
  0.971±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.57
• 重原子数：
  27
• 可旋转键数：
  13
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.68
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  isobutyl (3S)-5-benzyloxy-3-(tert-butyldimethylsilyl)oxypentanoate 在 2,6-二甲基吡啶 、 4-甲基苯磺酸吡啶 、 二异丁基氢化铝 作用下， 以 乙醇 、 二氯甲烷 、 甲苯 为溶剂， 生成 (3S,5S,6R)-6-methyl-1-phenylmethoxy-5-tri(propan-2-yl)silyloxyoct-7-en-3-ol
  参考文献：
  名称：

  Intramolecular palladium catalyzed alkoxy carbonylation of 6-hydroxy-1-octenes. Stereoselective synthesis of substituted tetrahydropyrans

  摘要：

  The reaction of hydroxy alkenes 5, 7, and 8 with CO and MeOH in the presence of PdCl2 and CuCl2 gave tetrahydropyrans 9, 11, and 12, respectively. Yields were dependent upon the configuration of substituents in the hydroxy alkene; in all cases, the tetrahydropyran was produced with 2,6-cis configuration. (C) 1999 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(98)02693-8
• 作为产物：
  描述：

  乙酰乙酸异丁酯 在 Ru₂Cl₄-(S)-(2,2'-bis(diphenylphosphino)-1,1'-binaphthyl)2*NEt₃ 2,6-二甲基吡啶 、 氢气 、 sodium hydride 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， -78.0 ℃ 、344.74 kPa 条件下， 反应 66.5h， 生成 isobutyl (3S)-5-benzyloxy-3-(tert-butyldimethylsilyl)oxypentanoate
  参考文献：
  名称：

  Total Synthesis of Polycavernoside A, A Lethal Toxin of the Red Alga Polycavernosa tsudai

  摘要：

  Two approaches to the synthesis of the aglycon 120 of polycavernoside A (1) were developed, only one of which was completed. The successful "second-generation" route assembled the aglycon seco acids 102 and 106 via Nozaki-Hiyama-Kishi coupling of aldehyde 70, prepared from methyl (S)3-hydroxy-2-methylpropionate (72) and (S)-pantolactone (73), with vinyl bromide 71. The latter was obtained from a sequence which commenced from the silyl ether 24 of 3-hydroxypropionaldehyde and entailed cyclization of (Z)-zeta -hydroxy-alpha,beta-unsaturated ester 82. Regioselective Yamaguchi lactonization of trihydroxycarboxylic acids 102 and 106 and subsequent functional-group adjustments led to macrolactone 120, to which the fucopyranosylxylopyranoside moiety was attached. Stille coupling of the glycosidated aglycon 128 with dienylstannane 129 furnished polycavernoside A in a synthesis for which the longest linear sequence was 25 steps. The overall yield to lactone 120 was 4.7%.

  DOI：

  10.1021/jo0503862

文献信息

• Total Synthesis of Polycavernoside A, A Lethal Toxin of the Red Alga <i>Polycavernosa </i><i>t</i><i>sudai</i>
  作者：Paul R. Blakemore、Cindy C. Browder、Jian Hong、Christopher M. Lincoln、Pavel A. Nagornyy、Lonnie A. Robarge、Duncan J. Wardrop、James D. White

  DOI：10.1021/jo0503862

  日期：2005.7.1

  Two approaches to the synthesis of the aglycon 120 of polycavernoside A (1) were developed, only one of which was completed. The successful "second-generation" route assembled the aglycon seco acids 102 and 106 via Nozaki-Hiyama-Kishi coupling of aldehyde 70, prepared from methyl (S)3-hydroxy-2-methylpropionate (72) and (S)-pantolactone (73), with vinyl bromide 71. The latter was obtained from a sequence which commenced from the silyl ether 24 of 3-hydroxypropionaldehyde and entailed cyclization of (Z)-zeta -hydroxy-alpha,beta-unsaturated ester 82. Regioselective Yamaguchi lactonization of trihydroxycarboxylic acids 102 and 106 and subsequent functional-group adjustments led to macrolactone 120, to which the fucopyranosylxylopyranoside moiety was attached. Stille coupling of the glycosidated aglycon 128 with dienylstannane 129 furnished polycavernoside A in a synthesis for which the longest linear sequence was 25 steps. The overall yield to lactone 120 was 4.7%.
• Intramolecular palladium catalyzed alkoxy carbonylation of 6-hydroxy-1-octenes. Stereoselective synthesis of substituted tetrahydropyrans
  作者：James D. White、Jian Hong、Lonnie A. Robarge

  DOI：10.1016/s0040-4039(98)02693-8

  日期：1999.2

  The reaction of hydroxy alkenes 5, 7, and 8 with CO and MeOH in the presence of PdCl2 and CuCl2 gave tetrahydropyrans 9, 11, and 12, respectively. Yields were dependent upon the configuration of substituents in the hydroxy alkene; in all cases, the tetrahydropyran was produced with 2,6-cis configuration. (C) 1999 Elsevier Science Ltd. All rights reserved.