benzyl ((2R,4R)-2-((tert-butyldimethylsilyl)oxy)-4,5-dihydroxypentanoyl)-L-prolinate | 1494545-76-4

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: benzyl ((2R,4R)-2-((tert-butyldimethylsilyl)oxy)-4,5-dihydroxypentanoyl)-L-prolinate
• CAS: 1494545-76-4
• 化学式: C₂₃H₃₇NO₆Si
• 分子量: 451.635
• InChiKey: NPLQKHLTXWINRG-HSALFYBXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.85
• 重原子数：
  31.0
• 可旋转键数：
  9.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.65
• 拓扑面积：
  96.3
• 氢给体数：
  2.0
• 氢受体数：
  6.0

反应信息

• 作为产物：
  描述：

  (R)-2-((tert-butyldimethylsilyl)oxy)pent-4-enoic acid 在 (8a,9R,8′′′a,9′′′R)-9,9′-[(2,5-diphenylpyrimidine-4,6-diyl)bis(oxy)]bis(6′-methoxy-10,11-dihydrocinchonan) 、 2O₆Os^(2-)*2K⁽¹⁺⁾ 、 potassium carbonate 、 N,N-二异丙基乙胺 、 bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate 、 potassium hexacyanoferrate(III) 作用下， 以 二氯甲烷 、 水 、 叔丁醇 为溶剂， 反应 16.0h， 生成 benzyl ((2R,4S)-2-((tert-butyldimethylsilyl)oxy)-4,5-dihydroxypentanoyl)-L-prolinate 、 benzyl ((2R,4R)-2-((tert-butyldimethylsilyl)oxy)-4,5-dihydroxypentanoyl)-L-prolinate
  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