(5R)-methyl 7,9-dibromo-8-methoxy-6-oxo-1-oxa-2-azaspiro[4.5]deca-2,7,9-triene-3-carboxylate

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑啉类
• 英文名称: (5R)-methyl 7,9-dibromo-8-methoxy-6-oxo-1-oxa-2-azaspiro[4.5]deca-2,7,9-triene-3-carboxylate
• 英文别名: methyl (5R)-7,9-dibromo-8-methoxy-6-oxo-1-oxa-2-azaspiro[4.5]deca-2,7,9-triene-3-carboxylate
• 化学式: C₁₁H₉Br₂NO₅
• 分子量: 395.004
• InChiKey: BMEUJRLCQFEPLZ-NSHDSACASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  19
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  74.2
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  (5R,10S)-methyl 7,9-dibromo-10-hydroxy-8-methoxy-1-oxa-2-azaspiro[4.5]deca-2,6,8-triene-3-carboxylate 在 邻苯二甲酸二甲酯 作用下， 以 二氯甲烷 为溶剂， 以75%的产率得到(5R)-methyl 7,9-dibromo-8-methoxy-6-oxo-1-oxa-2-azaspiro[4.5]deca-2,7,9-triene-3-carboxylate
  参考文献：
  名称：

  Asymmetric synthesis of aerothionin, a marine dimeric spiroisoxazoline natural product, employing optically active spiroisoxazoline derivative

  摘要：

  Successful first synthesis of optically pure (+)- and (-)-aerothionins (1) from the racemic spiroisoxazoline derivative 8 has been accomplished. The absolute configuration of natural (+)-1 was determined by comparison of (+)- and (-)-8 with related derivatives. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2005.11.097

文献信息

• Asymmetric Oxidative Cyclization of <i>o</i>-Phenolic Oxime-Esters:  First Synthesis of Enantiomerically Enriched Spiroisoxazoline Methyl Esters
  作者：Masatoshi Murakata、Masafumi Tamura、Osamu Hoshino

  DOI：10.1021/jo970082i

  日期：1997.6.1

  A new method for the synthesis of enantiomerically enriched cyclohexadienone spiroisoxazoline (-)-2a has been described. Asymmetric intramolecular oxidative cyclization of the o-phenolic oxime-ester 1c using a novel optically active tertiary alcohol (-)-3 as a chiral auxiliary proceeded smoothly to afford cyclohexadienone spiroisoxazoline 2c in 83% yield. Opitcally active tertiary alcohol (-)-3 was

  已经描述了一种合成对映体富集的环己二酮螺异恶唑啉（-）-2a的新方法。使用新型旋光性叔醇（-）-3作为手性助剂，对邻苯酚肟酯1c的不对称分子内氧化环化反应顺利进行，从而以83％的收率得到环己二酮螺异异唑啉2c。通过光学拆分，由外消旋（1S，8R，9R，10R）-8-苯基-1-癸醇（4）合成了具有活性的叔醇（-）-3。用CF（3）COOH除去2c中的手性助剂，然后进行甲基化，得到具有S-构型的74％ee（化学收率71％）的甲酯（-）-2a。2awas的绝对构型由海洋天然产物（+）-aeroothionin的合成决定。
• Asymmetric synthesis of aerothionin, a marine dimeric spiroisoxazoline natural product, employing optically active spiroisoxazoline derivative
  作者：Takahisa Ogamino、Rika Obata、Shigeru Nishiyama

  DOI：10.1016/j.tetlet.2005.11.097

  日期：2006.1

  Successful first synthesis of optically pure (+)- and (-)-aerothionins (1) from the racemic spiroisoxazoline derivative 8 has been accomplished. The absolute configuration of natural (+)-1 was determined by comparison of (+)- and (-)-8 with related derivatives. (c) 2005 Elsevier Ltd. All rights reserved.