penicillin G α-carboxy-4,5-dimethoxy-2-nitrobenzyl ester | 1233875-92-7

• 英文名称: penicillin G α-carboxy-4,5-dimethoxy-2-nitrobenzyl ester
• 英文别名: 2-(4,5-dimethoxy-2-nitrophenyl)-2-[(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(2-phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carbonyl]oxyacetic acid
• CAS: 1233875-92-7
• 化学式: C₂₆H₂₇N₃O₁₀S
• 分子量: 573.58
• InChiKey: CZDSEMFOKMDLQR-ZGQDTVHISA-N

物化性质

• 沸点：
  867.0±65.0 °C(Predicted)
• 密度：
  1.49±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  40
• 可旋转键数：
  10
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  203
• 氢给体数：
  2
• 氢受体数：
  11

反应信息

• 作为反应物：
  描述：

  penicillin G α-carboxy-4,5-dimethoxy-2-nitrobenzyl ester 以72%的产率得到penicillin G
  参考文献：
  名称：

  α-Carboxy-6-nitroveratryl: A Photolabile Protecting Group for Carboxylic Acids

  摘要：

  The synthesis of a new photolabile protecting group for carboxylic acids, alpha-carboxy-6-nitroveratryl (alpha CNV), is described. Bromide 3, prepared in four steps from 3,4-dimethoxyphenylacetic acid, was used to alkylate carboxylic acids under mild conditions in good yield. Palladium-catalyzed deallylation afforded the acids 4a-h, which underwent rapid and quantitative photolysis at wavelengths longer than 300 nm to liberate the carboxylic acid in good to quantitative yield. The rate of photolysis and quantum yield were determined to be 325 s(-1) and 0.17.

  DOI：

  10.1021/jo100783v
• 作为产物：
  描述：

  penicillin G α-allyloxycarbonyl-4,5-dimethoxy-2-nitrobenzyl ester 在 四(三苯基膦)钯 、 甲酸 、 三正丁胺 、 三苯基膦 、 盐酸 作用下， 以 四氢呋喃 、 水 为溶剂， 以80%的产率得到penicillin G α-carboxy-4,5-dimethoxy-2-nitrobenzyl ester
  参考文献：
  名称：

  α-Carboxy-6-nitroveratryl: A Photolabile Protecting Group for Carboxylic Acids

  摘要：

  The synthesis of a new photolabile protecting group for carboxylic acids, alpha-carboxy-6-nitroveratryl (alpha CNV), is described. Bromide 3, prepared in four steps from 3,4-dimethoxyphenylacetic acid, was used to alkylate carboxylic acids under mild conditions in good yield. Palladium-catalyzed deallylation afforded the acids 4a-h, which underwent rapid and quantitative photolysis at wavelengths longer than 300 nm to liberate the carboxylic acid in good to quantitative yield. The rate of photolysis and quantum yield were determined to be 325 s(-1) and 0.17.

  DOI：

  10.1021/jo100783v