(R)-2-((tert-butyldimethylsilyl)oxy)pent-4-enoic acid | 1494545-48-0

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (R)-2-((tert-butyldimethylsilyl)oxy)pent-4-enoic acid
• 英文别名: (2R)-2-[tert-butyl(dimethyl)silyl]oxypent-4-enoic acid
• CAS: 1494545-48-0
• 化学式: C₁₁H₂₂O₃Si
• 分子量: 230.379
• InChiKey: QWNQKVMYPNCZLC-SECBINFHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.04
• 重原子数：
  15
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (R)-2-((tert-butyldimethylsilyl)oxy)pent-4-enoic acid 在 AD-mix α 、 palladium on activated carbon 、 氢气 、 对甲苯磺酸 、 N,N-二异丙基乙胺 、 bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate 作用下， 以 乙醇 、 二氯甲烷 、 水 、 乙酸乙酯 、 叔丁醇 为溶剂， 反应 17.17h， 生成 (S)-HA-Pro-OH
  参考文献：
  名称：

  Scalable Solution-Phase Synthesis of the Biologically Active Cyclodepsipeptide Destruxin E, a Potent Negative Regulator of Osteoclast Morphology

  摘要：

  The scalable solution-phase synthesis of the cyclodepsipeptide destruxin E (1) has been achieved. Diastereoselective dihydroxylation of the terminal alkene in a 2-alkoxy-4-pentenoic amide, 7, was successfully accomplished utilizing (DHQD)(2)PHAL as the chiral ligand, and it was found that the use of the L-proline moiety in the substrate as a chiral auxiliary was essential for the induction of high diastereoselectivity to afford the key compound 4 on a gram scale. MNBA-mediated macrolactonization of 3 was also performed without formation of the dimerized product even under higher-dilution conditions, and it is noteworthy that the internal hydrogen bonds and s-cis configuration of the amide bond between N-methylalanine and N-methylvaline in the cyclization precursor 3 would assist in the macrolactonization to provide the macrolactone 2 without forming a dimerized product. Finally, epoxide formation in the side chain afforded destruxin E (1) on a gram scale in high purity (>98%).

  DOI：

  10.1021/jo402437z
• 作为产物：
  描述：

  (R)-2-(tert-butyldimethylsilyloxy)pent-4-enoic acid methyl ester 在 lithium hydroxide monohydrate 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 4.0h， 生成 (R)-2-((tert-butyldimethylsilyl)oxy)pent-4-enoic acid
  参考文献：
  名称：

  Scalable Solution-Phase Synthesis of the Biologically Active Cyclodepsipeptide Destruxin E, a Potent Negative Regulator of Osteoclast Morphology

  摘要：

  The scalable solution-phase synthesis of the cyclodepsipeptide destruxin E (1) has been achieved. Diastereoselective dihydroxylation of the terminal alkene in a 2-alkoxy-4-pentenoic amide, 7, was successfully accomplished utilizing (DHQD)(2)PHAL as the chiral ligand, and it was found that the use of the L-proline moiety in the substrate as a chiral auxiliary was essential for the induction of high diastereoselectivity to afford the key compound 4 on a gram scale. MNBA-mediated macrolactonization of 3 was also performed without formation of the dimerized product even under higher-dilution conditions, and it is noteworthy that the internal hydrogen bonds and s-cis configuration of the amide bond between N-methylalanine and N-methylvaline in the cyclization precursor 3 would assist in the macrolactonization to provide the macrolactone 2 without forming a dimerized product. Finally, epoxide formation in the side chain afforded destruxin E (1) on a gram scale in high purity (>98%).

  DOI：

  10.1021/jo402437z

文献信息

• SONIC HEDGEHOG MODULATORS
  申请人：Buhrlage Sara

  公开号：US20140094462A1

  公开（公告）日：2014-04-03

  Sonic Hedgehog modulators and methods of use thereof are provided for.

  索尼克刺猬调节剂及其使用方法已提供。