(+/-)-epinegamycin | 33404-78-3

• 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: (+/-)-epinegamycin
• 英文别名: 2-[[[(3R,5S)-3,6-diamino-5-hydroxyhexanoyl]amino]-methylamino]acetic acid
• CAS: 33404-78-3；38065-91-7；68681-77-6；68681-79-8；69352-42-7；75766-44-8；103420-24-2
• 化学式: C₉H₂₀N₄O₄
• 分子量: 248.282
• InChiKey: IKHFJPZQZVMLRH-RQJHMYQMSA-N

物化性质

• 熔点：
  145-168 °C (decomp)
• 密度：
  1.303±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -5.1
• 重原子数：
  17
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  142
• 氢给体数：
  5
• 氢受体数：
  7

安全信息

• 海关编码：
  2928000090

反应信息

• 作为反应物：
  描述：

  (+/-)-epinegamycin 在 三乙胺 作用下， 以 乙醚 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 20.5h， 生成 (-)-5-epi-Negamycin bis-Cbz methyl ester
  参考文献：
  名称：

  Palladium(II)-assisted difunctionalization of monoolefins: total synthesis of (+)-negamycin and (-)-5-epi-negamycin

  摘要：

  (+)-内加霉素和(-)-5-表内加霉素的合成过程包括以下步骤：首先，对具有光学活性的烯基碳酸酯进行钯(II)辅助的烷基化反应，随后将其与三烷基乙烯基锡进行羰基化偶联反应。(+)-内加霉素的合成共需15步，总产率为13%。而(-)-5-表内加霉素的合成则在12步内完成，总产率为20%。在制备这些化合物的过程中，还实现了不对称还原反应中的高度非对映选择性酮的还原，以及高效的分子内Mitsunobu反应的实施。

  DOI：

  10.1021/jo00069a012
• 作为产物：
  描述：

  ((R)-2-Iodomethyl-6-oxo-tetrahydro-pyran-4-yl)-carbamic acid tert-butyl ester 在 palladium on activated charcoal 吡啶 、 咪唑 、 盐酸 、 lithium hydroxide 、 sodium azide 、 四丁基氟化铵 、 氢气 、 potassium carbonate 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 二氯甲烷 、 乙酸乙酯 、 N,N-二甲基甲酰胺 为溶剂， 反应 66.25h， 生成 (+/-)-epinegamycin
  参考文献：
  名称：

  N- and C-terminal modifications of negamycin

  摘要：

  Negamycin 1 is a bactericidal antibiotic with activity against Gram-negative bacteria, and served as a template in an antibiotic discovery program. An orthogonally protected beta-amino acid derivative 3a was synthesized and used in parallel synthesis of negamycin derivatives on solid support. This advanced intermediate was also used for N- and C-terminal modifications using solution-phase methodologies. The N-terminal modifications have resulted in the identification of active analogues, whereas the C-terminal modifications resulted in complete loss of antibacterial activity. The N-methyl negamycin analogue, 19a, inhibits protein synthesis (IC50 = 2.3 muM), has antibacterial activity (Escherichia coli, MIC = 16 mug/mL), and is efficacious in an E. coli murine septicemia model (ED50 = 16.3 mg/kg). (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0960-894x(03)00393-7

文献信息

• Synthesis of (±)-negamycin and of (±)-epinegamycin
  作者：Georges Pasquet、Dominique Boucherot、William R. Pilgrim、Brian Wright

  DOI：10.1016/s0040-4039(00)77742-2

  日期：1980.1
• N- and C-terminal modifications of negamycin
  作者：B Raju、Kathleen Mortell、Sampathkumar Anandan、Hardwin O'Dowd、Hongwu Gao、Marcela Gomez、Corinne Hackbarth、Charlotte Wu、Wen Wang、Zhengyu Yuan、Richard White、Joaquim Trias、Dinesh V Patel

  DOI：10.1016/s0960-894x(03)00393-7

  日期：2003.7

  Negamycin 1 is a bactericidal antibiotic with activity against Gram-negative bacteria, and served as a template in an antibiotic discovery program. An orthogonally protected beta-amino acid derivative 3a was synthesized and used in parallel synthesis of negamycin derivatives on solid support. This advanced intermediate was also used for N- and C-terminal modifications using solution-phase methodologies. The N-terminal modifications have resulted in the identification of active analogues, whereas the C-terminal modifications resulted in complete loss of antibacterial activity. The N-methyl negamycin analogue, 19a, inhibits protein synthesis (IC50 = 2.3 muM), has antibacterial activity (Escherichia coli, MIC = 16 mug/mL), and is efficacious in an E. coli murine septicemia model (ED50 = 16.3 mg/kg). (C) 2003 Elsevier Science Ltd. All rights reserved.
• Palladium(II)-assisted difunctionalization of monoolefins: total synthesis of (+)-negamycin and (-)-5-epi-negamycin
  作者：John J. Masters、Louis S. Hegedus

  DOI：10.1021/jo00069a012

  日期：1993.8

  (+)-Negamycin and (-)-5-epi-negamycin were synthesized by a process involving the palladium-(II)-assisted alkylation of an optically active ene carbamate followed by carbonylative coupling to a trialkylvinyltin. The synthesis of (+)-negamycin was completed in 15 steps with an overall yield of 13%. The synthesis of (-)-5-epi-negamycin was completed in 12 steps with an overall yield of 20%. In preparing these compounds, a highly diastereoselective reduction of an unsaturated ketone and an efficient intramolecular Mitsunobu reaction were also carried out.

  (+)-内加霉素和(-)-5-表内加霉素的合成过程包括以下步骤：首先，对具有光学活性的烯基碳酸酯进行钯(II)辅助的烷基化反应，随后将其与三烷基乙烯基锡进行羰基化偶联反应。(+)-内加霉素的合成共需15步，总产率为13%。而(-)-5-表内加霉素的合成则在12步内完成，总产率为20%。在制备这些化合物的过程中，还实现了不对称还原反应中的高度非对映选择性酮的还原，以及高效的分子内Mitsunobu反应的实施。