4-[1-bromometh-(Z)-ylidene]-1-methyl-1,4-dihydrobenzo[d][1,3]oxazin-2-one | 1290035-24-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶嗪类
• 英文名称: 4-[1-bromometh-(Z)-ylidene]-1-methyl-1,4-dihydrobenzo[d][1,3]oxazin-2-one
• 英文别名: (4Z)-4-(bromomethylidene)-1-methyl-3,1-benzoxazin-2-one
• CAS: 1290035-24-3
• 化学式: C₁₀H₈BrNO₂
• 分子量: 254.083
• InChiKey: MNPFEZKRLRFQSO-TWGQIWQCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  14
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  29.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  [2-(2,2-dibromovinyl)phenyl]methylcarbamic acid tert-butyl ester 在 三氟乙酸 作用下， 以 二氯甲烷 、 二甲基亚砜 为溶剂， 反应 2.33h， 生成 4-[1-bromometh-(Z)-ylidene]-1-methyl-1,4-dihydrobenzo[d][1,3]oxazin-2-one
  参考文献：
  名称：

  Rapid, robust, clean, catalyst-free synthesis of 2-halo-3-carboxyindoles

  摘要：

  A novel synthesis of 2-halo-3-carboxyindoles from 2-(2,2-dihalovinyl)anilines was discovered. Reaction conditions and substrate applicability were studied. Optimally, the reaction takes only minutes when these substrates are heated in DMSO at 120 degrees C in the presence of cesium carbonate. However, the reaction is robust and takes place at a wide range of temperatures, is tolerant of aqueous reaction conditions, and can be performed in a variety of polar solvent/carbonate base combinations where the limiting factor is base solubility. A wide range of substituents is tolerated on the 2-(2,2-dihalovinyl)anilines, and yields are generally high, requiring only acidic aqueous work-up to obtain pure products. No catalyst is required for the transformation. The mechanism is believed to involve initial formation of an alkynyl bromide intermediate followed by ring closure and carbon dioxide trapping, leading to product formation. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2011.02.037

文献信息

• Rapid, robust, clean, catalyst-free synthesis of 2-halo-3-carboxyindoles
  作者：Aaron R. Kunzer、Michael D. Wendt

  DOI：10.1016/j.tetlet.2011.02.037

  日期：2011.4

  A novel synthesis of 2-halo-3-carboxyindoles from 2-(2,2-dihalovinyl)anilines was discovered. Reaction conditions and substrate applicability were studied. Optimally, the reaction takes only minutes when these substrates are heated in DMSO at 120 degrees C in the presence of cesium carbonate. However, the reaction is robust and takes place at a wide range of temperatures, is tolerant of aqueous reaction conditions, and can be performed in a variety of polar solvent/carbonate base combinations where the limiting factor is base solubility. A wide range of substituents is tolerated on the 2-(2,2-dihalovinyl)anilines, and yields are generally high, requiring only acidic aqueous work-up to obtain pure products. No catalyst is required for the transformation. The mechanism is believed to involve initial formation of an alkynyl bromide intermediate followed by ring closure and carbon dioxide trapping, leading to product formation. (C) 2011 Elsevier Ltd. All rights reserved.