Methyl 6-chloro-4-hydroxy-2H-1-benzothiopyran-3-carboxylate | 188423-69-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 硫色烯
• 英文名称: Methyl 6-chloro-4-hydroxy-2H-1-benzothiopyran-3-carboxylate
• 英文别名: methyl 6-chloro-4-hydroxy-2H-thiochromene-3-carboxylate
• CAS: 188423-69-0
• 化学式: C₁₁H₉ClO₃S
• 分子量: 256.71
• InChiKey: VJHMPCUHRXCKRI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  71.8
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-氨基吡啶 、 Methyl 6-chloro-4-hydroxy-2H-1-benzothiopyran-3-carboxylate 以 xylene 为溶剂， 反应 4.5h， 生成 6-Chloro-4-hydroxy-N-2-pyridinyl-2H-1-benzothiopyran-3-carboxamide
  参考文献：
  名称：

  Effect of Structural Modification of Enol−Carboxamide-Type Nonsteroidal Antiinflammatory Drugs on COX-2/COX-1 Selectivity

  摘要：

  Meloxicam (5), an NSAID in the enol-carboxamide class, was developed on the basis of its antiinflammatory activity and relative safety in animal models. In subsequent screening in microsomal assays using human COX-1 and COX-2, we discovered that it possessed a selectivity profile for COX-2 superior to piroxicam and other marketed NSAIDs. We therefore embarked on a study of enol-carboxamide type compounds to determine if COX-2 selectivity and potency could be dramatically improved by structural modification. Substitution at the 6- and 7-positions of the 4-oxo-1,2-benzothiazine-3-carboxamide, alteration of the N-methyl substituent, and amide modification were all examined. In addition we explored several related systems including the isomeric 3-oxo-1,2-benzothiazine-4-carboxamides, thienothiazines, indolothiazines, benzothienothiazines, naphthothiazines, and 1,3- and 1,4-dioxoisoquinolines. While a few examples were found with greater potency in the COX-2 assay, no compound tested had a better COX-2/COX-1 selectivity profile than that of 5.

  DOI：

  10.1021/jm9607010
• 作为产物：
  描述：

  6-氯硫代苯并二氢吡喃-4-酮 、 氰基甲酸甲酯 在 六甲基磷酰三胺 、 lithium diisopropyl amide 作用下， 生成 Methyl 6-chloro-4-hydroxy-2H-1-benzothiopyran-3-carboxylate
  参考文献：
  名称：

  Effect of Structural Modification of Enol−Carboxamide-Type Nonsteroidal Antiinflammatory Drugs on COX-2/COX-1 Selectivity

  摘要：

  Meloxicam (5), an NSAID in the enol-carboxamide class, was developed on the basis of its antiinflammatory activity and relative safety in animal models. In subsequent screening in microsomal assays using human COX-1 and COX-2, we discovered that it possessed a selectivity profile for COX-2 superior to piroxicam and other marketed NSAIDs. We therefore embarked on a study of enol-carboxamide type compounds to determine if COX-2 selectivity and potency could be dramatically improved by structural modification. Substitution at the 6- and 7-positions of the 4-oxo-1,2-benzothiazine-3-carboxamide, alteration of the N-methyl substituent, and amide modification were all examined. In addition we explored several related systems including the isomeric 3-oxo-1,2-benzothiazine-4-carboxamides, thienothiazines, indolothiazines, benzothienothiazines, naphthothiazines, and 1,3- and 1,4-dioxoisoquinolines. While a few examples were found with greater potency in the COX-2 assay, no compound tested had a better COX-2/COX-1 selectivity profile than that of 5.

  DOI：

  10.1021/jm9607010

文献信息

• A New Mild Method for the C-Acylation of Ketone Enolates. A Convenient Synthesis of β-Keto-Esters, -Thionoesters, and -Thioesters
  作者：Karl J. Hale、Milosz Grabski、Jakub T. Flasz

  DOI：10.1021/ol303324a

  日期：2013.1.18

  A new method for ketone enolate C-acylation is described which utilizes alkyl pentafluorophenylcarbonates, thiocarbonates, and thionocarbonates as the reactive acylating agents, and MgBr2·Et2O, DMAP, and i-Pr2NEt as the reagents for enolization. A wide range of ketones have been observed to undergo clean C-acylation via this protocol.

  描述了一种新的酮烯醇C-酰化方法，该方法利用烷基五氟苯基碳酸酯，硫代碳酸酯和硫代碳酸氢酯作为反应性酰化剂，并使用MgBr 2 ·Et 2 O，DMAP和i -Pr 2 NEt作为烯醇化试剂。通过该方案，已经观察到各种各样的酮经历了清洁的C-酰化。