5,6-dimethyl-2-sulfanylidene-1H-thieno[2,3-d][1,3]oxazin-4-one | 207743-81-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 杂芳族化合物
• 英文名称: 5,6-dimethyl-2-sulfanylidene-1H-thieno[2,3-d][1,3]oxazin-4-one
• CAS: 207743-81-5
• 化学式: C₈H₇NO₂S₂
• 分子量: 213.281
• InChiKey: JHAMPLNRGDBSNN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  13
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  98.7
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  溴乙烷 、 5,6-dimethyl-2-sulfanylidene-1H-thieno[2,3-d][1,3]oxazin-4-one 在 sodium carbonate 作用下， 以 丙酮 为溶剂， 反应 6.0h， 以85%的产率得到2-Ethylsulfanyl-5,6-dimethyl-thieno[2,3-d][1,3]oxazin-4-one
  参考文献：
  名称：

  Novel Thieno[2,3-d][1,3]oxazin-4-ones as Inhibitors of Human Leukocyte Elastase

  摘要：

  A series of thieno[2,3-d][1,3]oxazin-4-ones was synthesized and evaluated in vitro for inhibitory activity toward human leukocyte elastase. New synthetic routes to 2-alkoxy-, 2-alkylthio-, and 2-sec-amino-substituted derivatives are reported. This study demonstrates the versatility of 2-aminothiophenes prepared by Gewald reaction as a synthetic entry to serine protease-inhibiting, fused 1,3-oxazin-4-ones. Introduction of ethoxy, n-propoxy, and ethylthio groups at C-2 delivered the most potent inhibitors of this series with K-i values lower than 11 nM. Kinetic studies and product analyses revealed the formation of acyl-enzymes as a result of the attack of the active site serine at the carbon C-4 and subsequent deacylation. This mode of action is similar to the inhibition of serine proteases by 4H-3,1-benzoxazin-4-ones. Replacement of the benzene ring in benzoxazinones by a (substituted) thiophene led to improved hydrolytic stability and retained inhibitory potency.

  DOI：

  10.1021/jm9708341
• 作为产物：
  描述：

  4,5-二甲基-2-氨基噻吩-3-甲酸叔丁酯 在 三氟乙酸 、 calcium carbonate 作用下， 以 二氯甲烷 、 水 为溶剂， 反应 3.03h， 生成 5,6-dimethyl-2-sulfanylidene-1H-thieno[2,3-d][1,3]oxazin-4-one
  参考文献：
  名称：

  Novel Thieno[2,3-d][1,3]oxazin-4-ones as Inhibitors of Human Leukocyte Elastase

  摘要：

  A series of thieno[2,3-d][1,3]oxazin-4-ones was synthesized and evaluated in vitro for inhibitory activity toward human leukocyte elastase. New synthetic routes to 2-alkoxy-, 2-alkylthio-, and 2-sec-amino-substituted derivatives are reported. This study demonstrates the versatility of 2-aminothiophenes prepared by Gewald reaction as a synthetic entry to serine protease-inhibiting, fused 1,3-oxazin-4-ones. Introduction of ethoxy, n-propoxy, and ethylthio groups at C-2 delivered the most potent inhibitors of this series with K-i values lower than 11 nM. Kinetic studies and product analyses revealed the formation of acyl-enzymes as a result of the attack of the active site serine at the carbon C-4 and subsequent deacylation. This mode of action is similar to the inhibition of serine proteases by 4H-3,1-benzoxazin-4-ones. Replacement of the benzene ring in benzoxazinones by a (substituted) thiophene led to improved hydrolytic stability and retained inhibitory potency.

  DOI：

  10.1021/jm9708341