2-(5-tetrazolyl)benzopyran-4-one | 33543-91-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 2-(5-tetrazolyl)benzopyran-4-one
• 英文别名: 5-(4-Oxo-4H-1-benzopyran-2-yl)tetrazol；2-(Tetrazol-5-yl)-chromon；2-(1H-tetrazol-5-yl)-chromen-4-one；2-(tetrazol-5-yl)-4-oxo-4H-benzopyran；4H-1-Benzopyran-4-one, 2-(1H-tetrazol-5-yl)-；2-(2H-tetrazol-5-yl)chromen-4-one
• CAS: 33543-91-8
• 化学式: C₁₀H₆N₄O₂
• 分子量: 214.183
• InChiKey: ZZLXVXGOFGHKHP-UHFFFAOYSA-N

物化性质

• 沸点：
  419.5±55.0 °C(Predicted)
• 密度：
  1.560±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  16
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  80.8
• 氢给体数：
  1
• 氢受体数：
  5

安全信息

• 海关编码：
  2934999090

反应信息

• 作为产物：
  描述：

  2-cyanochromone 在 sodium azide 、 氯化铵 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 生成 2-(5-tetrazolyl)benzopyran-4-one
  参考文献：
  名称：

  苯并吡喃酮。7.一些2-（5-四唑基）色酮的合成和抗过敏活性。

  摘要：

  DOI：

  10.1021/jm00278a027

文献信息

• Process of producing 2-cyano-4-oxo-4H-benzopyran compounds
  申请人：SUMITOMO CHEMICAL COMPANY, LIMITED

  公开号：EP0634409A1

  公开（公告）日：1995-01-18

  There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2): wherein R¹ and R² are independently hydrogen, halogen, hydroxy, C₁-C₅ alkyl, C₁-C₅ alkoxy, nitro or a group of the RCONH wherein R is C₁-C₂₀ alkyl, phenyl, phenyl-substituted (C₁-C₂₀)alkyl, phenyl(C₁-C₂₀)alkoxyphenyl or (C₁-C₂₀)alkoxyphenyl. This production process is characterized in that a carboxamide of the general formula (1): wherein R¹ and R² are each as defined above, is reacted with a dehydrating agent in the presence of a pyridine compound of the general formula (4): wherein A¹ and A² are independently hydrogen or C₁-C₅ alkyl. If the final product cannot be obtained as crystals having good filtration properties by ordinary treatments, a novel technique as disclosed herein can provide such crystals by dissolving the reaction product in an organic solvent insoluble or slightly soluble in water; pouring the resultant solution into water; and removing the organic solvent by distillation with stirring to effect the crystallization of the final product.

  本发明公开了一种通式（2）的 2-氰基-4-氧代-4H-苯并吡喃化合物的生产工艺： 其中 R¹ 和 R² 独立地为氢、卤素、羟基、C₁-C₅ 烷基、C₁-C₅ 烷氧基、硝基或 RCONH 的基团，其中 R 为 C₁-C₂₀ 烷基、苯基、苯基取代(C₁-C₂₀)烷基、苯基(C₁-C₂₀)烷氧基苯基或(C₁-C₂₀)烷氧基苯基。该生产工艺的特征在于通式(1)的羧酰胺： 其中 R¹ 和 R² 均如上定义，在通式（4）的吡啶化合物存在下与脱水剂反应： 其中 A¹ 和 A² 独立地为氢或 C₁-C₅ 烷基。如果通过普通的处理方法无法获得具有良好过滤性能的结晶体，那么本文公开的一种新技术可以提供这种结晶体，其方法是将反应产物溶解在不溶于水或微溶于水的有机溶剂中；将所得溶液倒入水中；然后在搅拌下通过蒸馏除去有机溶剂，以实现最终产物的结晶。
• PROCESS FOR PRODUCING 2-(TETRAZOL-5-YL)-4-OXO-4H-BENZOPYRANS
  申请人：SUMITOMO CHEMICAL COMPANY, LIMITED

  公开号：EP0716088A1

  公开（公告）日：1996-06-12

  There is disclosed a process for producing a 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran of general formula (1): which comprises reacting a hydroxyacetophenone of general formula (2): with a tetrazole compound of general formula (3): in the presence of a base in a solvent composed mainly of at least one selected from hydrocarbons, halogenated hydrocarbons and alcohols, and then treating the reaction mixture under acidic conditions.

  本发明公开了一种通式（1）的 2-（四唑-5-基）-4-氧代-4H-苯并吡喃的生产工艺： 其中包括使通式(2)的羟基苯乙酮反应： 与通式（3）的四唑化合物反应： 在主要由碳氢化合物、卤代烃和醇中至少一种组成的溶剂中，在碱存在下与四唑化合物反应，然后在酸性条件下处理反应混合物。
• PROCESS FOR PRODUCING TETRAZOLE COMPOUND AND INTERMEDIATE THEREFOR
  申请人：SUMITOMO CHEMICAL COMPANY LIMITED

  公开号：EP0711762A1

  公开（公告）日：1996-05-15

  There are disclosed an industrially favorable process for producing a tetrazole compound of general formula (1): characterized in that a nitrile of general formula (2):         R¹CN     (2) is reacted with hydrazine or a salt thereof in the presence of a catalyst, followed by reaction with a nitrous acid compound of general formula (3):         ANO₂     (3) or a nitrile of general formula (2) is reacted with hydrogen sulfide, followed by reaction with an alkyl halide of general formula (4):         R⁴J     (4) with hydrazine or a salt thereof, and then with a nitrous acid compound of general formula (3); and an intermediate of general formula (5):         R¹C(=R⁵)R⁶     (5) which is useful for the production of the tetrazole compound (in which R¹ to R⁶, A and J in the above formulas are as defined in the specification).

  本发明公开了一种生产通式（1）四唑化合物的工业化生产工艺： 其特征在于，通式（2）的腈： R¹CN (2) 在催化剂存在下与肼或其盐反应，然后与通式(3)的亚硝酸化合物反应： ANO₂ (3) 或通式（2）的腈与硫化氢反应，然后与通式（4）的烷基卤化物反应： R⁴J (4) 与肼或其盐反应，然后与通式（3）的亚硝酸化合物反应；以及通式（5）的中间体： R¹C(=R⁵)R⁶ (5) 其中上述式中的 R¹ 至 R⁶、A 和 J 如说明书中所定义）。
• A Direct and High Yielding Route to 2-(5-Tetrazolyl) Substituted Benzopyran-4-ones: Synthesis of Pranlukast
  作者：Graham R. Geen、Robert G. Giles、Trevor J. Grinter、John D. Hayler、Simon L. B. Howie、Graham Johnson、Inderjit S. Mann、Vance J. Novack、Paul W. Oxley、John K. Quick、Neil Smith

  DOI：10.1080/00397919708003052

  日期：1997.3

  A direct and high yielding route to 2-(5-tetrazolyl)benzopyran-4-ones 1, including pranlukast 1a is described. This involves the Claisen condensation reaction between the relevant hydroxyacetophenone 2 and the ethyl eater of tetrazole-2-carboxylic acid 5 to give the 1,3-diketone 6, which is then cyclised to give the desired benzopyran-4-ones 1.
• PROCESS FOR PRODUCING TETRAZOLE COMPOUNDS
  申请人：SUMITOMO CHEMICAL COMPANY LIMITED

  公开号：EP0711762B1

  公开（公告）日：2003-08-06