7-acetoxy-8-acetyl-3-ethyl-4-methylcoumarin | 1360548-06-6

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 香豆素及其衍生物
• 英文名称: 7-acetoxy-8-acetyl-3-ethyl-4-methylcoumarin
• 英文别名: (8-Acetyl-3-ethyl-4-methyl-2-oxochromen-7-yl) acetate
• CAS: 1360548-06-6
• 化学式: C₁₆H₁₆O₅
• 分子量: 288.3
• InChiKey: JWIMOEVJMXAVGP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  21
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  69.7
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  2-乙基乙酰乙酸乙酯 在 4-二甲氨基吡啶 、 aluminum (III) chloride 、 硫酸 作用下， 以 四氢呋喃 为溶剂， 反应 26.0h， 生成 7-acetoxy-8-acetyl-3-ethyl-4-methylcoumarin
  参考文献：
  名称：

  Substrate specificity of acetoxy derivatives of coumarins and quinolones towards Calreticulin mediated transacetylation: Investigations on antiplatelet function

  摘要：

  Calreticulin transacetylase (CRTAase) is known to catalyze the transfer of acetyl group from polyphenolic acetates (PA) to certain receptor proteins (RP), thus modulating their activity. Herein, we studied for the first time the substrate specificity of CRTAase towards N-acetylamino derivatives of coumarins and quinolones. This study is endowed with antiplatelet action by virtue of causing CRTAase catalyzed activation of platelet Nitric Oxide Synthase (NOS) by way of acetylation leading to the inhibition of ADP/Arachidonic acid (AA)-dependent platelet aggregation. Among all the N-acetylamino/acetoxy coumarins and quinolones screened, 7-N-acetylamino-4-methylcoumarin (7-AAMC, 17) was found to be the superior substrate to platelet CRTAase and emerged as the most promising antiplatelet agent both in vitro and in vivo. Further it caused the inhibition of cyclooxygenase-1 (Cox-1) resulting in the down regulation of thromboxane A2 (TxA2), modulation of tissue factor and the inhibition of platelet aggregation. It was also found effective in the inhibition of LPS induced pro-thrombotic conditions. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2011.11.016

文献信息

• Substrate specificity of acetoxy derivatives of coumarins and quinolones towards Calreticulin mediated transacetylation: Investigations on antiplatelet function
  作者：Abha Kathuria、Nivedita Priya、Karam Chand、Prabhjot Singh、Anjali Gupta、Sarah Jalal、Shilpi Gupta、Hanumantharao G. Raj、Sunil K. Sharma

  DOI：10.1016/j.bmc.2011.11.016

  日期：2012.2

  Calreticulin transacetylase (CRTAase) is known to catalyze the transfer of acetyl group from polyphenolic acetates (PA) to certain receptor proteins (RP), thus modulating their activity. Herein, we studied for the first time the substrate specificity of CRTAase towards N-acetylamino derivatives of coumarins and quinolones. This study is endowed with antiplatelet action by virtue of causing CRTAase catalyzed activation of platelet Nitric Oxide Synthase (NOS) by way of acetylation leading to the inhibition of ADP/Arachidonic acid (AA)-dependent platelet aggregation. Among all the N-acetylamino/acetoxy coumarins and quinolones screened, 7-N-acetylamino-4-methylcoumarin (7-AAMC, 17) was found to be the superior substrate to platelet CRTAase and emerged as the most promising antiplatelet agent both in vitro and in vivo. Further it caused the inhibition of cyclooxygenase-1 (Cox-1) resulting in the down regulation of thromboxane A2 (TxA2), modulation of tissue factor and the inhibition of platelet aggregation. It was also found effective in the inhibition of LPS induced pro-thrombotic conditions. (C) 2011 Elsevier Ltd. All rights reserved.