6,8-dibromo-7-methoxy-3-hydroximino-3,4-dihydrocoumarin | 914222-80-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并呋喃
• 英文名称: 6,8-dibromo-7-methoxy-3-hydroximino-3,4-dihydrocoumarin
• 英文别名: 6,8-dibromo-3-hydroxyimino-7-methoxy-4H-chromen-2-one
• CAS: 914222-80-3
• 化学式: C₁₀H₇Br₂NO₄
• 分子量: 364.978
• InChiKey: AQHHBLNOFAELHG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.51
• 重原子数：
  17.0
• 可旋转键数：
  1.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  68.12
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  6,8-dibromo-7-methoxy-3-hydroximino-3,4-dihydrocoumarin 在 polymer-supported phenyliodine(III) diacetate 作用下， 以 乙腈 为溶剂， 生成 N-benzyl-7,9-dibromo-8-methoxy-6-oxo-1-oxa-2-azaspiro[4,5]deca-2,7,9-triene-3-carbamide
  参考文献：
  名称：

  Efficient Synthesis of Tyrosine-Derived Marine Sponge Metabolites via Acylation of Amines with a Coumarin

  摘要：

  Condensation of N-acetylglycine with aldehyde 15 in acetic anhydride gave acetamido coumarin 16. Hydrolysis to the enol coumarin 17 and reaction with hydroxylamine gave the oximino coumarin 18. Reaction of the oximino coumarin 18 with a range of nucleophiles gave the phenolic oximes in excellent yield. The rates of acylation of histamine with the oximino coumarin 18 and methyl ester 9 were compared. Oxidative spirocyclization of three representative phenolic oximes with polymersupported (diacetoxyiodo) benzene gave the spiroisoxazolines.

  DOI：

  10.1021/jo050846r
• 作为产物：
  描述：

  6,8-dibromo-3-hydroxy-7-methoxy-coumarin 在 盐酸羟胺 、 sodium acetate 作用下， 以 乙醇 、 水 为溶剂， 生成 6,8-dibromo-7-methoxy-3-hydroximino-3,4-dihydrocoumarin 、 (2E)-3-(3,5-dibromo-2-hydroxy-4-methoxyphenyl)-N-hydroxy-2-hydroxyiminopropanamide
  参考文献：
  名称：

  Efficient Synthesis of Tyrosine-Derived Marine Sponge Metabolites via Acylation of Amines with a Coumarin

  摘要：

  Condensation of N-acetylglycine with aldehyde 15 in acetic anhydride gave acetamido coumarin 16. Hydrolysis to the enol coumarin 17 and reaction with hydroxylamine gave the oximino coumarin 18. Reaction of the oximino coumarin 18 with a range of nucleophiles gave the phenolic oximes in excellent yield. The rates of acylation of histamine with the oximino coumarin 18 and methyl ester 9 were compared. Oxidative spirocyclization of three representative phenolic oximes with polymersupported (diacetoxyiodo) benzene gave the spiroisoxazolines.

  DOI：

  10.1021/jo050846r