(S)-4-[(R)-1-(4-Methoxy-benzyloxy)-allyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde | 171625-65-3

• 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: (S)-4-[(R)-1-(4-Methoxy-benzyloxy)-allyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde
• 英文别名: (4S)-4-[(1R)-1-[(4-methoxyphenyl)methoxy]prop-2-enyl]-2,2-dimethyl-1,3-dioxolane-4-carbaldehyde
• CAS: 171625-65-3
• 化学式: C₁₇H₂₂O₅
• 分子量: 306.359
• InChiKey: BPMPQDZQXFMVQG-WBVHZDCISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  22
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  54
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (S)-4-[(R)-1-(4-Methoxy-benzyloxy)-allyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde 在 叔丁基锂 、 sodium hexamethyldisilazane 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 1.87h， 生成 (1S,2S,3R,4S)-2-((Z)-2-{(S)-4-[(R)-1-(4-Methoxy-benzyloxy)-allyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-vinyl)-3-methoxymethoxy-7,7-dimethyl-1-vinyl-bicyclo[2.2.1]heptan-2-ol
  参考文献：
  名称：

  An Abbreviated, Highly Stereocontrolled Route to Precursors of Taxol. Elaboration of a Fully Functionalized C Ring by Means of Intramolecular Aldol Cyclization

  摘要：

  The asymmetric synthesis of an advanced taxol precursor is reported. The scheme involves the conversion of (R)-glyceraldehyde acetonide into the Q-vinyl iodide 2, transmetalation of this intermediate, and 1,2-addition to the D-camphor derivative 11 from the endo direction. This convergent coupling gives rise to exo alcohol 12, which undergoes anionic oxy-Cope rearrangement at low temperatures. In situ methylation of the resulting enolate anion delivers 13, which is chemoselectively transformed into aldehyde 18. In a key step, the aldol cyclization of 18 proceeds without beta-elimination to deliver a tricyclic product in which proper absolute configuration is adopted at the two stereogenic centers being newly introduced. Following protection of the hydroxyl substituent as in 19b,the alpha-hydroxy ketone 21 is heated with aluminum tri-tert-butoxide in benzene in order to effect near-quantitative rearrangement to the taxol-like isomer 22.

  DOI：

  10.1021/jo00129a027
• 作为产物：
  描述：

  (S)-2-((R)-((R)-2,2-Dimethyl-1,3-dioxolan-4-yl)((p-methoxybenzyl)oxy)methyl)glycidaldehyde diethyl acetal 在 咪唑 、 sodium hydroxide 、 碘 、 4-甲基苯磺酸吡啶 、 三苯基膦 、 锌 作用下， 以 甲醇 、 乙醇 、 水 、 二甲基亚砜 、 丙酮 、 甲苯 、 乙腈 为溶剂， 反应 19.0h， 生成 (S)-4-[(R)-1-(4-Methoxy-benzyloxy)-allyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde
  参考文献：
  名称：

  An Abbreviated, Highly Stereocontrolled Route to Precursors of Taxol. Elaboration of a Fully Functionalized C Ring by Means of Intramolecular Aldol Cyclization

  摘要：

  The asymmetric synthesis of an advanced taxol precursor is reported. The scheme involves the conversion of (R)-glyceraldehyde acetonide into the Q-vinyl iodide 2, transmetalation of this intermediate, and 1,2-addition to the D-camphor derivative 11 from the endo direction. This convergent coupling gives rise to exo alcohol 12, which undergoes anionic oxy-Cope rearrangement at low temperatures. In situ methylation of the resulting enolate anion delivers 13, which is chemoselectively transformed into aldehyde 18. In a key step, the aldol cyclization of 18 proceeds without beta-elimination to deliver a tricyclic product in which proper absolute configuration is adopted at the two stereogenic centers being newly introduced. Following protection of the hydroxyl substituent as in 19b,the alpha-hydroxy ketone 21 is heated with aluminum tri-tert-butoxide in benzene in order to effect near-quantitative rearrangement to the taxol-like isomer 22.

  DOI：

  10.1021/jo00129a027